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Gao X, Liu Y, Cheng M, Wang Z, Zhang Y, Zhao Z. Investigating the addition of Fe for improving contaminant removal and regulating microbes in a simulated coastal wetland. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:42174-42184. [PMID: 38861066 DOI: 10.1007/s11356-024-33733-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2024] [Accepted: 05/14/2024] [Indexed: 06/12/2024]
Abstract
Contaminants from wastewater of aquaculture are increasing the risks of red tides in coastal areas. Such types of contaminants are difficult to remove by using conventional biological and ecological treatment methods because of the relatively low C/N ratios and the high salinity in coastal water ambience. Fe is considered a key element in natural chemical cycling and promotes the growth of animals and plants as well. The cycling of Fe ion combined with carbon, nitrogen, and phosphorus stimulates bacterial growth. As a result, it acts as a microbial carbon pump in coastal areas, such as natural wetlands, which have been activated and adapted to be salinity resistant and insufficient energy supply. Along these lines, in this work, constructed wetlands (CWs) with high ecological benefits and low cost of maintenance were used to treat aquaculture wastewater. The impact of Fe ion recycling on multiple contaminants was also systematically investigated. The two types of Fe dosage were pure ferrous ions and a mixture of iron powder and ferrous ions. After the application of a 3-day treatment, the dosage of iron powder/ferric ions (1:1 m/m) at a concentration of 15 mg L-1 showed a better effect, where the total nitrogen, total phosphorus, and chemical oxygen demand removal rates were increased by 2.95%, 2.16%, and 9.76%, respectively. From the microbial analysis, it was indicated that Fe ion affected the abundance and functions of the microbial communities in the CWs. The significant enrichment of Proteobacteria promoted the removal of multiple contaminants under saline stress and fixed carbon, and affected the whole microbe distribution and diversity in CWs. The implementation of such an environmentally friendly and economical approach arises as a promising candidate for the efficient removal of multiple contaminants from aquacultural wastewater in coastal zones.
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Affiliation(s)
- Xueqing Gao
- College of Oceanography and Ecological Science, Shanghai Ocean University, Engineering Research Center for Water Environment Ecology in Shanghai, Shanghai, 201306, China
| | - Yanqiu Liu
- College of Oceanography and Ecological Science, Shanghai Ocean University, Engineering Research Center for Water Environment Ecology in Shanghai, Shanghai, 201306, China
| | - Mengqi Cheng
- College of Oceanography and Ecological Science, Shanghai Ocean University, Engineering Research Center for Water Environment Ecology in Shanghai, Shanghai, 201306, China
- Environmental Science and Technology doctorate school, Autonomous University of Barcelona, 08290, Barcelona, Spain
| | - Zhufang Wang
- College of Oceanography and Ecological Science, Shanghai Ocean University, Engineering Research Center for Water Environment Ecology in Shanghai, Shanghai, 201306, China
- School of Sustainability, Civil and Environmental Engineering, University of Surrey, Guildford, GU2 7XH, England
| | - Yinjiang Zhang
- College of Oceanography and Ecological Science, Shanghai Ocean University, Engineering Research Center for Water Environment Ecology in Shanghai, Shanghai, 201306, China
| | - Zhimiao Zhao
- College of Oceanography and Ecological Science, Shanghai Ocean University, Engineering Research Center for Water Environment Ecology in Shanghai, Shanghai, 201306, China.
- Hebei Key Laboratory of Wetland Ecology and Conservation, Hengshui, 053000, Hebei, China.
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A D, Guo QM, Deng YY, Jiang Y, Chen CX. Purification of the secondary treatment tail water for wastewater reclamation by integrated subsurface-constructed wetlands. ENVIRONMENTAL TECHNOLOGY 2024; 45:2450-2458. [PMID: 36730286 DOI: 10.1080/09593330.2023.2176260] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2022] [Accepted: 01/25/2023] [Indexed: 06/18/2023]
Abstract
A whole-year investigation of full-scale integrated subsurface-constructed wetlands (ISCWs) was carried out to purify the tail water from a wastewater treatment plant (WWTP) for wastewater reclamation under four plant species, four hydraulic loading rates (HLRs), and four seasons. The results showed that ISCWs were effective for the purification of WWTP discharge, with the average removal efficiencies of COD, NH4+-N, TN, and TP being 48%, 49%, 9%, and 30%, respectively. Typical pollutant concentrations in the treated effluent of ISCWs were 8.19 mg/L COD, 1.76 mg/L NH4+-N, 11.57 mg/L TN, and 0.36 mg/L TP, which met most of the water quality standards for reusing recycling water. Emergent plants with well-developed root systems may be capable of promoting the decontamination of ISCWs. Seasonal change played an important role in the treatment process: the removal of phosphorus by plant uptake and microbial utilization was more active in the warm season and the co-occurrence of organic degradation and nitrification, whereas the cold season is conducive to exothermic adsorption process of pollutants to substrates. Properly increasing the HLRs may improve the availability of ISCWs according to the requirement of effluent quality. Furthermore, the C/N ratio might be the key factor for the purification effect of ISCWs, because the COD level of WWTP discharge may change the process of NH4+-N biotransformation.
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Affiliation(s)
- Dan A
- Engineering and Technology Research Center for Agricultural Land Pollution Integrated Prevention and Control of Guangdong Higher Education Institute, College of Resources and Environment, Zhongkai University of Agriculture and Engineering, Guangzhou, People's Republic of China
| | - Qin-Mei Guo
- Engineering and Technology Research Center for Agricultural Land Pollution Integrated Prevention and Control of Guangdong Higher Education Institute, College of Resources and Environment, Zhongkai University of Agriculture and Engineering, Guangzhou, People's Republic of China
| | - Yang-Yang Deng
- Engineering and Technology Research Center for Agricultural Land Pollution Integrated Prevention and Control of Guangdong Higher Education Institute, College of Resources and Environment, Zhongkai University of Agriculture and Engineering, Guangzhou, People's Republic of China
| | - Yu Jiang
- Engineering and Technology Research Center for Agricultural Land Pollution Integrated Prevention and Control of Guangdong Higher Education Institute, College of Resources and Environment, Zhongkai University of Agriculture and Engineering, Guangzhou, People's Republic of China
| | - Chun-Xing Chen
- Shenzhen Academy of Environmental Sciences, Shenzhen, People's Republic of China
- State Environmental Protection Key Laboratory of Drinking Water Source Management and Technology, Shenzhen, People's Republic of China
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Ewemoje OE, Semprini L, Wood BD, Sangodoyin AY, Radniecki TS. Effectiveness of the tropical plants Rhynchospora corymbosa and Coix lacryma-jobi in vertical flow constructed wetlands for municipal primary sewage effluent treatment. INTERNATIONAL JOURNAL OF PHYTOREMEDIATION 2023; 25:1542-1557. [PMID: 36880391 DOI: 10.1080/15226514.2023.2171963] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
The performance of two tropical plants, Rhynchospora corymbosa L. (RC) and Coix lacryma-jobi, L (CL) in treatment of primary sewage effluent in lab-scale vertical-flow constructed wetlands (VFCW) along with no plant control wetland was investigated. A batch-flow VFCWs were operated under batch fill and drain hydraulic loading system with hydraulic retention times (HRT) of 0.5, 1, and 2 days and fill rate of 8 L/day. Removal of solids, organics, nutrients, and pathogens were monitored. The volumetric contaminant removal rates were best described by 1st order kinetics except for ammonia and phosphate, which was best described by Stover-Kincannon kinetics. Influent TSS, PO43-, COD, BOD5, and total coliform concentration were low but high in NH4+ concentration. CL was better in nutrient removal as HRT increases compared to RC. RC was more efficient at TSS, turbidity, and organics removal. Pathogen removal was independent of plant type but HRT. Solids and organic removal were lower in CL planted CWs due to preferential flow paths created by their bulky root. CL planted CWs removed more nutrients followed by RC planted CWs and then no-plant control CWs. The results of these tests demonstrate that both CL and RC are suitable for the treatment of municipal wastewater in VFCW system.
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Affiliation(s)
- Oluseyi E Ewemoje
- Department of Agricultural and Environmental Engineering, University of Ibadan, Ibadan, Nigeria
| | - Lewis Semprini
- School of Chemical, Biological and Environmental Engineering, Oregon State University, Corvallis, OR, USA
| | - Brian D Wood
- School of Chemical, Biological and Environmental Engineering, Oregon State University, Corvallis, OR, USA
| | - Abimbola Y Sangodoyin
- Department of Agricultural and Environmental Engineering, University of Ibadan, Ibadan, Nigeria
| | - Tyler S Radniecki
- School of Chemical, Biological and Environmental Engineering, Oregon State University, Corvallis, OR, USA
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Nema A, Prasad R, Sharma D, Yadav KD, Christian RA, Ibrahim H. Performance evaluation of different macrophytes in small‐scale vertical flow constructed wetlands for greywater treatment using principal component analysis. CAN J CHEM ENG 2022. [DOI: 10.1002/cjce.24527] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Anudeep Nema
- Civil Engineering Department Sardar Vallabhbhai National Institute of Technology Surat Gujarat India
| | - Rajnikant Prasad
- Civil Engineering Department Sardar Vallabhbhai National Institute of Technology Surat Gujarat India
| | - Dayanand Sharma
- Civil Engineering Department National Institute of Technology Patna, Ashok Rajpath, Mahendru Patna Bihar India
| | - Kunwar D. Yadav
- Civil Engineering Department Sardar Vallabhbhai National Institute of Technology Surat Gujarat India
| | - Robin A. Christian
- Civil Engineering Department Sardar Vallabhbhai National Institute of Technology Surat Gujarat India
| | - Hussameldin Ibrahim
- Clean Energy Technologies Research Institute, Process Systems Engineering, Faculty of Engineering and Applied Science University of Regina, 3737 Wascana Parkway Regina Saskatchewan Canada
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Kilingo FM, Bernard Z, Hongbin C. Study of domestic wastewater treatment using Moringa oleifera coagulant coupled with vertical flow constructed wetland in Kibera Slum, Kenya. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:36589-36607. [PMID: 35064879 DOI: 10.1007/s11356-022-18692-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2021] [Accepted: 01/12/2022] [Indexed: 06/14/2023]
Abstract
The domestic wastewater collection and treatment rate of Nairobi, Kenya are not high. The wastewater in the Kibera slum on the outskirts of the city that is directly discharged to the environment and pollution of the surrounding water body is a serious problem. This paper takes the domestic wastewater in the slum area as the research objective and researches on the wastewater characteristics, collection, and treatment, therefore providing the reference for the wastewater collection and treatment technology in the region. In this paper, domestic wastewater in the Kibera slum of Nairobi was sampled and investigated to find out the characteristics of wastewater discharged, the way of discharge of the household wastewater, and the management in this area. The study shows that there are differences in the concentration of main pollutants such as nutrients and organic matter in the wastewater from the household discharged to the residential river in the slum area. The domestic wastewater in this slum area contained a high concentration of nutrients such as nitrogen and phosphorus and other organics, total suspended solids (TSS), total coliforms and color, and with no treatment methods. Therefore, economic and feasible treatment technology needs to be developed. A pilot study was conducted on the treatment of domestic wastewater in the slum area by combining the seed extract of the natural plant Moringa oleifera as a coagulant and vertical flow constructed wetland (VFCW) at Tongji University, Shanghai, China. The VFCW system was efficient in chemical oxygen demand (COD), TSS, turbidity, total phosphorus (TP), and phosphates (PO4-P) removal, but the removal efficiency of nitrogen (total nitrogen (TN), ammonium nitrogen (NH4-N), and nitrate (NO3-N)) was poor, and the effluent pH reached the required discharge country's standard of the water. The average removal efficiencies for COD (79.99%), TSS (86.84%), turbidity (87.35%), TP (61.29%), PO4-P (65.66%), TN (14.11%), NH4-N (18.17%), and NO3-N (93%) were achieved by the treatment system. Furthermore, the removal efficiencies of pollutants such as TP, PO4-P, TN, and NH4-N were carried out by using the fruit extract of Moringa oleifera as raw material and zeolite as an auxiliary agent. The comprehensive effect of zeolite combined with VFCW and natural coagulant in the treatment of domestic wastewater was investigated. The COD removal efficiency was increased by (9%). TN by (46%), NH4-N by (67%), TP by (19%), and turbidity improved by (9%). In short, the domestic wastewater in the Kibera slum was collected and pretreated with natural plant coagulant, and then purified by vertical flow constructed wetland, which can not only significantly reduce the pollutant concentration but also basically meet the discharge standards. It is a low-cost sewage treatment technology suitable for poor areas.
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Affiliation(s)
- Flory Mkangombe Kilingo
- UNEP-TONGJI Institute of Environmental Science and Sustainable Development (IESD), Tongji University, Siping Road 1239, Shanghai, 200092, People's Republic of China
- The State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Sciences and Engineering, Tongji University, Shanghai, 200092, China
| | - Zulu Bernard
- UNEP-TONGJI Institute of Environmental Science and Sustainable Development (IESD), Tongji University, Siping Road 1239, Shanghai, 200092, People's Republic of China
- The State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Sciences and Engineering, Tongji University, Shanghai, 200092, China
| | - Chen Hongbin
- UNEP-TONGJI Institute of Environmental Science and Sustainable Development (IESD), Tongji University, Siping Road 1239, Shanghai, 200092, People's Republic of China.
- The State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Sciences and Engineering, Tongji University, Shanghai, 200092, China.
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Seasonal Enhancement of Nitrogen Removal on Domestic Wastewater Treatment Performance by Partially Saturated and Saturated Hybrid Constructed Wetland. WATER 2022. [DOI: 10.3390/w14071089] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The aim of this study is to evaluate seasonal enhancement of nitrogen removal on domestic wastewater treatment performance by partially saturated and saturated HBCWs. To achieve this, two HBCWs consisting of a vertical subsurface flow constructed wetland, followed by a horizontal subsurface flow constructed wetland (VSSF-HSSF) were evaluated. Two saturation levels were used: (a) partially saturated HB1:VSSF1 (0.6 m)-HSSF1 (0.15 m), (b) saturated HB2: VSSF2 (0.8 m)-HSSF2 (0.25 m). Each unit was planted with Schoenoplectus californicus and was operated for 297 days. The removal efficiencies in HB1 and HB2 were above 70%, 86%, 77% and 55% for chemical oxygen demand (COD), total suspended solids (TSS), nitrogen as ammonium (NH4+-N), and total nitrogen (TN), respectively. For VSSF, a higher level of saturation (from 0.6 to 0.8 m) meant a decrease of 17% in the TN removal efficiencies, and for HSSF, an increase from 0.15 to 0.25 m of saturation meant a decrease of 11 and 10% in the NH4+-N and TN removal efficiencies, respectively. Thus, the increase of saturation level in HBCWs reduces the transformation and/or removal of components of the wastewaters to be treated, particularly nitrogen. Through this research, the possibility of optimizing the transformation of nitrogen with partially saturated hybrids can be examined.
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Lu J, Guo Z, Kang Y, Fan J, Zhang J. Recent advances in the enhanced nitrogen removal by oxygen-increasing technology in constructed wetlands. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2020; 205:111330. [PMID: 32977288 DOI: 10.1016/j.ecoenv.2020.111330] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2020] [Revised: 09/05/2020] [Accepted: 09/09/2020] [Indexed: 06/11/2023]
Abstract
Constructed wetland has attracted more and more attention for wastewater purification due to its low construction cost and convenient operation recently. However, the unique waterflooding structure of constructed wetland makes the low dissolved oxygen level, which limits the effect of nitrogen removal in the system. Therefore, it is necessary to develop the oxygen-increasing technology to overcome the drawback in constructed wetlands. In this review, the mechanism of nitrogen removal in constructed wetland is discussed and oxygen is main influence factor is concluded. In addition, oxygen-increasing technologies in recent advances which improve the nitrogen removal efficiency greatly, are emphatically introduced. Finally, some future perspectives about oxygen-increasing techniques are also put forward in order to provide reference for further research and engineering application.
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Affiliation(s)
- Jiaxing Lu
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao, 266237, China
| | - Zizhang Guo
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao, 266237, China.
| | - Yan Kang
- College of Environment and Safety Engineering, Qingdao University of Science and Technology, Qingdao, 266042, China
| | - Jinlin Fan
- Department of Science and Technology Management, Shandong University, Jinan, 250100, China
| | - Jian Zhang
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao, 266237, China.
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Kotsia D, Deligianni A, Fyllas NM, Stasinakis AS, Fountoulakis MS. Converting treatment wetlands into "treatment gardens": Use of ornamental plants for greywater treatment. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 744:140889. [PMID: 32711317 DOI: 10.1016/j.scitotenv.2020.140889] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Revised: 07/08/2020] [Accepted: 07/09/2020] [Indexed: 06/11/2023]
Abstract
Nowadays, the use of constructed wetlands for on-site greywater treatment is a very promising option. The successful application of this nature-based solution at full scale requires public acceptance, economic feasibility and the production of high-quality treated greywater. This work focuses on the use of ornamental plants as vertical flow constructed wetland (VFCW) vegetation for greywater treatment, aiming to improve aesthetic and acceptability of the system. The performance and economic feasibility of the proposed green technology were examined during a 2-years study. Results show that Pittosporum tobira and Hedera helix can grow in VFCW operating with greywater without any visible symptoms. These species tolerated both drought and flooding conditions, making them ideal for use not only in residential buildings but also in seasonal hotels and holiday homes. In contrast, partial defoliation of Polygala myrtifolia plants was observed during the winter period. High average removal efficiencies were observed for BOD (99%), COD (96%) and TSS (94%) in all examined VFCWs including unplanted beds. Phosphorus removal gradually decreased from 100% during first months of operation to 15% during second year of operation. In addition, total coliforms concentration reduced by 2.2 log units in the effluent of all planted systems, while lower removal efficiency was observed in the absence of plants. The mean concentration of BOD and TSS in the treated greywater met the standards for indoor reuse (<10 mg/L). Cost payback periods for the installation of the proposed technology in a multi-family building, a single house and a hotel in Greece were found 4.7, 16.6 and 2.5 years, respectively. Overall, the "treatment gardens" proposed in this study provide a technically and economically feasible solution for greywater treatment, with the additional benefit of improving the aesthetic of urban, semi-urban and touristic areas.
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Affiliation(s)
- D Kotsia
- Department of Environment, University of the Aegean, Mytilene, Greece
| | - A Deligianni
- Water Resources Management Group, Wageningen University, the Netherlands
| | - N M Fyllas
- Department of Environment, University of the Aegean, Mytilene, Greece
| | - A S Stasinakis
- Department of Environment, University of the Aegean, Mytilene, Greece
| | - M S Fountoulakis
- Department of Environment, University of the Aegean, Mytilene, Greece.
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Rahman ME, Bin Halmi MIE, Bin Abd Samad MY, Uddin MK, Mahmud K, Abd Shukor MY, Sheikh Abdullah SR, Shamsuzzaman SM. Design, Operation and Optimization of Constructed Wetland for Removal of Pollutant. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2020; 17:E8339. [PMID: 33187288 PMCID: PMC7698012 DOI: 10.3390/ijerph17228339] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/23/2020] [Revised: 10/26/2020] [Accepted: 10/31/2020] [Indexed: 01/30/2023]
Abstract
Constructed wetlands (CWs) are affordable and reliable green technologies for the treatment of various types of wastewater. Compared to conventional treatment systems, CWs offer an environmentally friendly approach, are low cost, have fewer operational and maintenance requirements, and have a high potential for being applied in developing countries, particularly in small rural communities. However, the sustainable management and successful application of these systems remain a challenge. Therefore, after briefly providing basic information on wetlands and summarizing the classification and use of current CWs, this study aims to provide and inspire sustainable solutions for the performance and application of CWs by giving a comprehensive review of CWs' application and the recent development of their sustainable design, operation, and optimization for wastewater treatment. To accomplish this objective, thee design and management parameters of CWs, including macrophyte species, media types, water level, hydraulic retention time (HRT), and hydraulic loading rate (HLR), are discussed. Besides these, future research on improving the stability and sustainability of CWs are highlighted. This article provides a tool for researchers and decision-makers for using CWs to treat wastewater in a particular area. This paper presents an aid for informed analysis, decision-making, and communication. The review indicates that major advances in the design, operation, and optimization of CWs have greatly increased contaminant removal efficiencies, and the sustainable application of this treatment system has also been improved.
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Affiliation(s)
- Md Ekhlasur Rahman
- Department of Land Management, Faculty of Agriculture, Universiti Putra Malaysia, Serdang 43400, Malaysia; (M.E.R.); (M.Y.B.A.S.); (M.K.U.)
- Divisional Laboratory, Soil Resource Development Institute, Krishi Khamar Sarak, Farmgate, Dhaka-1215, Bangladesh;
| | - Mohd Izuan Effendi Bin Halmi
- Department of Land Management, Faculty of Agriculture, Universiti Putra Malaysia, Serdang 43400, Malaysia; (M.E.R.); (M.Y.B.A.S.); (M.K.U.)
| | - Mohd Yusoff Bin Abd Samad
- Department of Land Management, Faculty of Agriculture, Universiti Putra Malaysia, Serdang 43400, Malaysia; (M.E.R.); (M.Y.B.A.S.); (M.K.U.)
| | - Md Kamal Uddin
- Department of Land Management, Faculty of Agriculture, Universiti Putra Malaysia, Serdang 43400, Malaysia; (M.E.R.); (M.Y.B.A.S.); (M.K.U.)
| | - Khairil Mahmud
- Department of Crop Science, Faculty of Agriculture, Universiti Putra Malaysia, Serdang 43400, Malaysia;
| | - Mohd Yunus Abd Shukor
- Department of Biochemistry, Faculty of Biotechnology and Biomolecular Science, Universiti Putra Malaysia, Serdang 43400, Malaysia;
| | - Siti Rozaimah Sheikh Abdullah
- Department of Chemical & Process Engineering, Faculty of Engineering & Built Environment, Universiti Kebangsaan Malaysia, UKM Bangi 43600, Malaysia;
| | - S M Shamsuzzaman
- Divisional Laboratory, Soil Resource Development Institute, Krishi Khamar Sarak, Farmgate, Dhaka-1215, Bangladesh;
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Removal of nutrients from domestic wastewater using constructed wetlands: assessment of suitable environmental and operational conditions. ACTA ACUST UNITED AC 2020. [DOI: 10.1007/s42398-020-00124-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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11
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Treatment of Winery Wastewater Using Bench-Scale Columns Simulating Vertical Flow Constructed Wetlands with Adsorption Media. APPLIED SCIENCES-BASEL 2020. [DOI: 10.3390/app10031063] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Wastewater produced during the wine-making process often contains an order of magnitude greater chemical oxygen demand (COD) concentration than is typical of domestic wastewater. This waste stream is also highly variable in flow and composition due to the seasonality of wine-making. The recent growth of small-scale wineries in cold climates and increasing regulations present a need for low-cost, easily-operable treatment systems that do not require large amounts of land, yet maintain a high level of treatment in cool temperatures. This research investigates the use of a subsurface vertical flow constructed wetland (SVFCW) to treat winery wastewater. In this study, clinoptilolite, tire chips, and a nano-enhanced iron foam were used to enhance bench-scale gravel cells to adsorb ammonia, nitrate, and phosphorus, respectively. The treatment systems, without nitrogen adsorption media, performed well, with >99% removal of COD and 94% removal of total nitrogen. Treatment systems with the nitrogen adsorption media did not enhance nitrogen removal. Equilibrium was reached within two weeks of start-up, regardless of prior inoculation, which suggests that microbes present in the winery wastewater are sufficient for the start-up of the wastewater treatment system; therefore, the seasonality of winery wastewater production will not substantially impact treatment. Operating the treatment systems under cool temperatures did not significantly impact COD or total nitrogen removal. Further, the use of nano-enhanced iron foam exhibited 99.8% removal of phosphorus, which resulted in effluent concentrations that were below 0.102 mg/L P.
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Batool A, Saleh TA. Removal of toxic metals from wastewater in constructed wetlands as a green technology; catalyst role of substrates and chelators. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2020; 189:109924. [PMID: 31759740 DOI: 10.1016/j.ecoenv.2019.109924] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/07/2019] [Revised: 11/03/2019] [Accepted: 11/04/2019] [Indexed: 06/10/2023]
Abstract
In recent years knowledge in regard to phytoremediation for removal of metals from wastewater has been extensively developed. Despite advance treatment methods; different plants were widely used for wastewater treatment that may affect the efficiency of plants by stressing their natural ability. Therefore, this paper reviews the catalytic role of constructed wetlands, spiking of chelators and substrates to enhance phytoremediation for removal of metals. Catalytic combination of substrates, chelators with plants helped to remove different metals from wastewater simultaneously without compromising the plant's health. Moreover, this paper summarizes the interaction mechanism of plants with the chelators and substrates within constructed wetlands. In addition, this paper also discusses the potential research needs for this field.
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Affiliation(s)
- Ammara Batool
- National University of Sciences and Technology, Islamabad, Pakistan.
| | - Tawfik A Saleh
- King Fahd University of Petroleum and Minerals, Dhahran, Saudi Arabia.
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13
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Nema A, Yadav KD, Christian RA. A small-scale study of plant orientation in treatment performance of vertical flow constructed wetland in continuous flow. INTERNATIONAL JOURNAL OF PHYTOREMEDIATION 2020; 22:849-856. [PMID: 31969000 DOI: 10.1080/15226514.2020.1715918] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
In constructed wetland (CW) ecology, plants play a vital role in wastewater treatment. The plants provide an adequate surface to various microorganisms, transfers oxygen and uptake nutrients to treat wastewater. This study deals with the treatment of greywater by using vertical flow constructed wetland system (VFCW). In the present study, two reactors were prepared for two different orientations in monoculture (S-1) and mixed culture (S-2) by using four types of macrophytes (Canna indica, Colocasia, Hymenocallis littoralis, and Phragmites australis). The reactors were operated in continuous mode for 90 days by maintaining the 10 mL/min flow rate and 1-day retention time. The mean removal efficiency of S-1 is 40.70, 33.69, 27.13, 48.17, 66.76, and 50.82% for ammonia, total kjeldahl nitrogen (TKN), phosphate, sulfate, turbidity, and chemical oxygen demand (COD), respectively. The mean removal efficiency of S-2 CW is 53.06, 34.54, 37.49, 48.64, 69.26, and 58.26% for ammonia, TKN, phosphate, sulfate, turbidity, and COD, respectively. ANOVA showed significant differences among both VFCWs in removal efficiency for all measured parameters. The performance of the two systems was compared with each other with the significance level of p = 0.05. The results indicated that the orientation of plant plays a major role in the removal of various physicochemical parameters.
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Affiliation(s)
- Anudeep Nema
- Department of Civil Engineering, Sardar Vallabhbhai National Institute of Technology, Surat, Gujarat, India
| | - Kunwar D Yadav
- Department of Civil Engineering, Sardar Vallabhbhai National Institute of Technology, Surat, Gujarat, India
| | - Robin A Christian
- Department of Civil Engineering, Sardar Vallabhbhai National Institute of Technology, Surat, Gujarat, India
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Zhao Z, Zhang X, Cheng M, Song X, Zhang Y, Zhong X. Influences of Iron Compounds on Microbial Diversity and Improvements in Organic C, N, and P Removal Performances in Constructed Wetlands. MICROBIAL ECOLOGY 2019; 78:792-803. [PMID: 31025062 DOI: 10.1007/s00248-019-01379-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2019] [Accepted: 04/08/2019] [Indexed: 06/09/2023]
Abstract
The effects of various combinations of iron compounds on the contaminant removal performance in constructed wetlands (CWs) were explored under various initial iron concentrations, contaminant concentrations, different hydraulic retention time (HRT), and different temperatures. The Combo 6 (nanoscale zero-valent iron combined with Fe3+) in CW treatments showed the highest pollutant removal performance under the conditions of C2 initial iron dosage concentration (total iron 0.2 mM) and I2 initial contaminant concentration (COD:TN:TP = 60 mg/L:60 mg/L:1 mg/L) in influent after 72-h HRT. These results were directly verified by two different microbial tests (Biolog test and high-throughput pyrosequencing) and microbial community analysis (principal component analysis of community-level physiological profile, biodiversity index, cluster tree, relative abundance at order of taxonomy level). Specific bacteria related to significant improvements in contaminant removal were domesticated by various combinations of iron compounds. Iron dosage was advised as a green, new, and effective option for wastewater treatment. Graphical Abstract .
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Affiliation(s)
- Zhimiao Zhao
- College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai, 201306, China
- Engineering Research Center for Water Environment Ecology in Shanghai, Shanghai, 201306, China
| | - Xiao Zhang
- College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai, 201306, China
- Engineering Research Center for Water Environment Ecology in Shanghai, Shanghai, 201306, China
| | - Mengqi Cheng
- College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai, 201306, China
- Engineering Research Center for Water Environment Ecology in Shanghai, Shanghai, 201306, China
| | - Xinshan Song
- State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry, College of Environmental Science and Engineering, Donghua University, People's road 2999, Donghua University academic building NO.4, office 5153, Songjiang District, Shanghai, 201620, China.
| | - Yinjiang Zhang
- College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai, 201306, China
- Engineering Research Center for Water Environment Ecology in Shanghai, Shanghai, 201306, China
| | - Xiangmei Zhong
- College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai, 201306, China
- Engineering Research Center for Water Environment Ecology in Shanghai, Shanghai, 201306, China
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Batool A. Metal accumulation from leachate by polyculture in crushed brick and steel slag using pilot-scale constructed wetland in the climate of Pakistan. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:31508-31521. [PMID: 31478177 DOI: 10.1007/s11356-019-06211-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2018] [Accepted: 08/14/2019] [Indexed: 06/10/2023]
Abstract
The temperate climate of Pakistan has enhanced the performance of macrophytes grown in crushed brick and steel slag in constructed wetland for removal of heavy metals from leachate. Two pilot-scale constructed wetlands [constructed wetland 1 (CW1) and constructed wetland 2 (CW2)] were planted with a polyculture of Phragmites australis and Typha latifolia in crushed brick and steel slag, respectively. These wetlands were located in the National University of Sciences and Technology, Islamabad campus, and operated for 15 months for treatment of leachate with climatic variations of Islamabad. The metal accumulation in a polyculture of Phragmites australis and Typha latifolia and in substrates was analyzed in the laboratory of Institute of Environmental Sciences and Engineering located near wetland site. Despite the high temperature in summer season, removal of Cu, Zn, and Pb was efficient due to the synergistic combination of macrophytes and substrates in both wetlands. Substrates acted as a primary sink of metals and enhanced metal accumulation in the plant's roots which resulted in poor translocation of Cu, Zn, and Pb to shoots. Despite the variation in precipitation and temperature during summer and winter seasons, the average removal of copper, zinc, and lead was 95%, 91%, and 89% by polyculture in crushed brick in CW1 and 97%, 95%, and 91% in steel slag in CW2, respectively. A The variation in climate has a negligible effect on the sorption of metals by both substrates in CW1 and CW2. Furthermore, Phragmites australis with crushed brick in CW1 was efficient for removal of Zn and Typha latifolia was performing better with steel slag in CW2 for significantly high removal of Cu and Pb in the climate of Islamabad, Pakistan.
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Affiliation(s)
- Ammara Batool
- Institute of Environmental Sciences and Engineering (IESE), School of Civil and Environmental Engineering (SCEE), National University of Sciences and Technology (NUST), Islamabad, 44000, Pakistan.
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16
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Xu P, Xiao E, He F, Xu D, Zhang Y, Wang Y, Wu Z. High performance of integrated vertical-flow constructed wetland for polishing low C/N ratio river based on a pilot-scale study in Hangzhou, China. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:22431-22449. [PMID: 31154652 DOI: 10.1007/s11356-019-05508-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2018] [Accepted: 05/16/2019] [Indexed: 06/09/2023]
Abstract
We investigated the treatment efficiency of micro-polluted NO3--dominated river water with low C/N ratio by five parallel pilot-scale IVCWs with different plant and substrate collocation. When the mean concentration was 2.24 and 0.193 mg L-1 in influent, IVCWs achieved an average (mass) removal rate of (0.09 g m-2 day-1) 46.8% and (0.77 g m-2 day-1) 62.3% for TN and TP, respectively, during 1 year of operation. Water quality was significantly improved from grade V to meet the criterion of grade IV of surface water. Through the comparison of removal rate by different IVCWs, we found that lack of carbon sources in influent limited the denitrification in the middle and bottom layers (ML, BL) of IVCW. Zeolites deployed in the upper layer (UL) of IVCW reduced the overall N removal efficiency compared with gravels, due to a stronger nitrification but weaker denitrification. Canna indica (C. indica) was superior to Arundo donax (A. donax) and Thalia dealbata (T. dealbata) for N removal in the UL of IVCW due to higher aboveground biomass accumulation and microbial removal during the first 10 months. Stronger nitrification and denitrification were simultaneously facilitated near the rhizosphere of C. indica. When entered into Dec., A. donax performed higher N removal efficiency than the other two species. The internal replenishment of peats in the ML as carbon sources significantly improved N and P removal efficiency. Zeolites with stronger capacity of ammonium (NH4+) adsorption was more in favor of anammox in the BL, when compared with roseites, but both of them were not conducive to the growth of denitrifiers. However, the deployment of shale ceramisites obtained an opposite result. Gemmata and Pirellula as anammox bacteria were more enriched in the zeolite layer, whereas some anaerobic denitrifiers (Corynebacterium and Paludibacter) and heterotrophic denitrifiers including Bacillus, Geobacter, Pseudomonas, and Lactococcus were more found in shale ceramisite. Supply of peats as carbon sources in the ML was beneficial for the adhesion of anammox bacteria and denitrifiers in the BL of shale ceramisites. An ideal model composed of C. indica + A. donax (DFU)-gravel (UL)-anthracite+peat (ML)-zeolite+shale ceramsite (BL)-Acorus calamus (UFU) was proposed for treating this type of river water to achieve high efficiency.
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Affiliation(s)
- Peng Xu
- School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan, 430072, China
| | - Enrong Xiao
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, China.
| | - Feng He
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, China
| | - Dong Xu
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, China
| | - Yi Zhang
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, China
| | - Yafen Wang
- School of Environmental Studies, China University of Geosciences, Wuhan, 430072, China
| | - Zhenbin Wu
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, China
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Kraiem K, Kallali H, Wahab MA, Fra-Vazquez A, Mosquera-Corral A, Jedidi N. Comparative study on pilots between ANAMMOX favored conditions in a partially saturated vertical flow constructed wetland and a hybrid system for rural wastewater treatment. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 670:644-653. [PMID: 30909042 DOI: 10.1016/j.scitotenv.2019.03.220] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/16/2018] [Revised: 03/02/2019] [Accepted: 03/14/2019] [Indexed: 06/09/2023]
Abstract
The objective of this research was to evaluate the nitrogen removal in a single stage rural wastewater treatment system. It was a modified subsurface vertical flow (SSVF) constructed wetland. The so-called Anaerobic Ammonium Oxidation(ANAMMOX) process is favored by imposing a saturated zone at the bottom of the basin. The nitrogen removal performances of this modified SSVF were compared to those of a conventional hybrid system where the well-known nitrification-denitrification process is performed. This study was carried out using three lab-scale pilots of constructed wetlands during four months: (1) a hybrid constructed wetlands with a reed-Phragmites australis SSVF bed in serial with a cattail-Typha angustofolia SSHF bed (SSVFp + SSHF). (2) A reed-Phragmites australis SSVF bed partially saturated at 40% of its depth (SSVFPS); (3) A cattail-Typha angustofolia SSVF bed partially saturated at 40% of its depth (SSVFTS). The results showed that the three configurations used in this study were efficient for most of the pollutants reduction. In fact, single-stage reactors have achieved similar chemical oxygen demand (COD) removal in comparison to the two-stage reactor independently of the macrophytes species. However, for Total Kjeldahl Nitrogen (TKN), a slightly higher nitrogen removal efficiency was recorded for (SSVF p + SSHF) with an average removal rate of 53% versus 48% and 51% for SSVF PS and SSVFTS respectively. These findings were highlighted with fluorescent in situ hybridization (FISH) analysis, which demonstrated the presence of major differences in the community composition and abundance of the bacteria involved with denitrification and nitrification in the three systems. In fact, SSVFP of the hybrid system was characterized by highest relative abundance of nitrifying bacteria (13% Nitrosomonas, 11% Nitrosospira, 14% Nitrospira and 10% Nitrobacter). While, the SSHF of hybrid system had larger number of denitrifying species than SSVF, with relative abundances of pseudomonas (3%), Paracoccus (9%), Zoogloea (6%), Thauera (4%), Thiobacillus (2%) and Aeromonas (1%). Interestingly, in the SSVFST (planted with Thypha angustofolia) where the relative abundance of nitrifying bacteria was very low (4% Nitrosomonas, 4% Nitrosospira, 4% Nitrospira and 1% Nitrobacter), we have detected the presence of ANAMMOX bacteria (3%). Accordingly SSVFST in the presence of Thypha angustofolia have favored the development of ANAMMOX activity in comparison to the other configurations.
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Affiliation(s)
- Khadija Kraiem
- Effluent Treatment and Valorization Laboratory (ETVL), Water Research and Technology Center (WATREC), Carthage University, Technopark Tourist Route of Soliman Nabeul, PO-box N°273-8020, Soliman, Tunisia; Faculty of Sciences of Tunis, University of Tunis El Manar, B.P. no. 94 - ROMMANA, Tunis 1068, Tunisia.
| | - Hamadi Kallali
- Effluent Treatment and Valorization Laboratory (ETVL), Water Research and Technology Center (WATREC), Carthage University, Technopark Tourist Route of Soliman Nabeul, PO-box N°273-8020, Soliman, Tunisia
| | - Mohamed Ali Wahab
- Effluent Treatment and Valorization Laboratory (ETVL), Water Research and Technology Center (WATREC), Carthage University, Technopark Tourist Route of Soliman Nabeul, PO-box N°273-8020, Soliman, Tunisia
| | - Andrea Fra-Vazquez
- Department of Chemical Engineering, Institute of Technological Research, School of Engineering, Universidade de Santiago de Compostela, Rua Lope Gómez de Marzoa s/n, E-15782 Santiago de Compostela, Spain
| | - Anukha Mosquera-Corral
- Department of Chemical Engineering, Institute of Technological Research, School of Engineering, Universidade de Santiago de Compostela, Rua Lope Gómez de Marzoa s/n, E-15782 Santiago de Compostela, Spain
| | - Naceur Jedidi
- Effluent Treatment and Valorization Laboratory (ETVL), Water Research and Technology Center (WATREC), Carthage University, Technopark Tourist Route of Soliman Nabeul, PO-box N°273-8020, Soliman, Tunisia
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18
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Zhao Z, Xu C, Zhang X, Song X. Addition of iron materials for improving the removal efficiencies of multiple contaminants from wastewater with a low C/N ratio in constructed wetlands at low temperatures. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:11988-11997. [PMID: 30827018 DOI: 10.1007/s11356-019-04648-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2018] [Accepted: 02/19/2019] [Indexed: 06/09/2023]
Abstract
Constructed wetlands (CWs) are widely used in wastewater treatment. Wastewater generally contains multiple contaminants. In this study, CWs were applied to treat wastewater with a low COD/TN ratio and containing heavy metals. Iron-based material was added in CWs to enhance the treatment efficiency. The contaminant removal efficiency was positively correlated with the dosage of iron-based material. Considering the operation cost, we added 1 g of iron-based material in CW and realized the multi-contaminant removal efficiency after 4-day treatment at low temperature: 99.51% of Cu(II), 87.22% of Cr(VI), 65.62% of TN, and 60.23% of COD. Microbial community analysis and kinetic analysis predicted that the removal mechanism involved ion exchange and microbial denitrification. Specific bacteria were found in CWs with iron-based material, such as Thiobacillus spp. and Thauera spp., indicating that the nitrate removal in the denitrification process was triggered by carbon sources and that Fe2+ worked as both the electron donor and the adjuster of the abundances of specific bacteria. The addition of iron-based material into CWs was a green option to improve the pollutant removal performance.
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Affiliation(s)
- Zhimiao Zhao
- College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai, 201306, China
- Engineering Research Center for Water Environment Ecology in Shanghai, Shanghai, 201306, China
| | - Chenglong Xu
- College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai, 201306, China
- Engineering Research Center for Water Environment Ecology in Shanghai, Shanghai, 201306, China
| | - Xiao Zhang
- College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai, 201306, China
- Engineering Research Center for Water Environment Ecology in Shanghai, Shanghai, 201306, China
| | - Xinshan Song
- Engineering Research Center for Water Environment Ecology in Shanghai, Shanghai, 201306, China.
- State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry, College of Environmental Science and Engineering, Donghua University, Shanghai, 201620, China.
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Role of Wetland Plants and Use of Ornamental Flowering Plants in Constructed Wetlands for Wastewater Treatment: A Review. APPLIED SCIENCES-BASEL 2019. [DOI: 10.3390/app9040685] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The vegetation in constructed wetlands (CWs) plays an important role in wastewater treatment. Popularly, the common emergent plants in CWs have been vegetation of natural wetlands. However, there are ornamental flowering plants that have some physiological characteristics similar to the plants of natural wetlands that can stimulate the removal of pollutants in wastewater treatments; such importance in CWs is described here. A literature survey of 87 CWs from 21 countries showed that the four most commonly used flowering ornamental vegetation genera were Canna, Iris, Heliconia and Zantedeschia. In terms of geographical location, Canna spp. is commonly found in Asia, Zantedeschia spp. is frequent in Mexico (a country in North America), Iris is most commonly used in Asia, Europe and North America, and species of the Heliconia genus are commonly used in Asia and parts of the Americas (Mexico, Central and South America). This review also compares the use of ornamental plants versus natural wetland plants and systems without plants for removing pollutants (organic matter, nitrogen, nitrogen and phosphorous compounds). The removal efficiency was similar between flowering ornamental and natural wetland plants. However, pollutant removal was better when using ornamental plants than in unplanted CWs. The use of ornamental flowering plants in CWs is an excellent option, and efforts should be made to increase the adoption of these system types and use them in domiciliary, rural and urban areas.
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20
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Mello D, Carvalho KQ, Passig FH, Freire FB, Borges AC, Lima MX, Marcelino GR. Nutrient and organic matter removal from low strength sewage treated with constructed wetlands. ENVIRONMENTAL TECHNOLOGY 2019; 40:11-18. [PMID: 28891384 DOI: 10.1080/09593330.2017.1377291] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2016] [Accepted: 08/19/2017] [Indexed: 06/07/2023]
Abstract
The role of Eichhornia crassipes for removing pollutants from low strength sewage was evaluated in three pilot-scale constructed wetlands (CW): CW 1, planted with E. crassipes in a filter media; CW 2, unplanted, composed by filter media; and CW 3, composed by E. crassipes floating on the sewage. The operation was divided into three stages by varying the nominal hydraulic retention time into: (I) 24 h; (II) 48 h; (III) 72 h. Temporal sampling profiles were carried out with collection of the influent and effluent samples to determine temperature, pH, chemical oxygen demand (COD), TKN and TP. Contents of TP and TN were analyzed in the plant tissue of the macrophyte. The best removal efficiency rates for phosphorus (38%) and TKN (47%) were obtained in CW 3 for 72 h. The highest COD removal was observed in the CW 2 (80%) for 48 h. The macrophyte E. crassipes contributed to the absorption process with uptake rate percentages of 8.3% (CW 1) and 9.0% (CW 3) for TN and 0.78% (CW 1) and 1.56% (CW 3) for TP on the dry matter of the plant. The chosen species planted in the systems contributed to the achievement of higher nutrient removal.
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Affiliation(s)
- D Mello
- a Environmental Sciences and Technology Graduate Program. St. Deputado Heitor de Alencar Furtado , Federal University of Technology , Curitiba , Brazil
| | - K Q Carvalho
- b Civil Construction Academic Department. St. Deputado Heitor de Alencar Furtado , Federal University of Technology , Curitiba , Brazil
| | - F H Passig
- c Chemistry and Biology Academic Department. St. Deputado Heitor de Alencar Furtado , Federal University of Technology , Curitiba , Brazil
| | - F B Freire
- b Civil Construction Academic Department. St. Deputado Heitor de Alencar Furtado , Federal University of Technology , Curitiba , Brazil
| | - A C Borges
- d Department of Agricultural Engineering , Federal University of Viçosa , Viçosa , Brazil
| | - M X Lima
- e Civil Engineering Graduate Program. St. Deputado Heitor de Alencar Furtado , Federal University of Technology , Curitiba , Brazil
| | - G R Marcelino
- c Chemistry and Biology Academic Department. St. Deputado Heitor de Alencar Furtado , Federal University of Technology , Curitiba , Brazil
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Decezaro ST, Wolff DB, Araújo RK, Faccenda HB, Perondi T, Sezerino PH. Vertical flow constructed wetland planted with Heliconia psittacorum used as decentralized post-treatment of anaerobic effluent in Southern Brazil. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART A, TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING 2018; 53:1131-1138. [PMID: 30596356 DOI: 10.1080/10934529.2018.1530106] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2018] [Accepted: 04/28/2018] [Indexed: 06/09/2023]
Abstract
In order to investigate the potential of vertical flow constructed wetlands (VFCWs), a 24.5 m2 surface area filled with gravel and planted with Heliconia psittacorum, was implemented as an experimental system for domestic wastewater treatment in southern Brazil. The aims of the study were to (i) evaluate the performance of a full scale system septic tank (ST) and VFCW for decentralized domestic wastewater treatment, and (ii) identify the influence of Heliconia for hydraulic characteristics and consequent performance of the VFCW. The applied load rates in the VFCW were, on average, 10 g biochemical oxygen demand (BOD) m-2 day-1, 4 g NH4+-N m-2 day-1 and a hydraulic loading rate (HLR) of 60 mm day-1. Physicochemical analyses of wastewater treatment were carried out through grab sample methodology, for 5 months. Additionally, hydrodynamic tests were performed during plant development using rhodamine. The study demonstrated the viability of the system for decentralized wastewater treatment in Brazil, with average removal efficiencies of 78% for chemical oxygen demand (COD) and 84% for total suspended solids (TSS), according to national effluent discharge regulations. In spite of media's large size, the VFCW achieved good average removal efficiencies. The tracer test results showed that the VFCW average hydraulic detention time increased as plants grew. This may have occurred due to interception of wastewater applied on the macrophyte's leaves as well as a reduction in filter media permeability caused by the spread of roots and rhizomes. These results indicate that the plants played an important role in increasing wastewater contact time in wetlands with high hydraulic conductivity such as a gravel VFCW.
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Affiliation(s)
- Samara Terezinha Decezaro
- a Department of Sanitary and Environmental Engineering , Federal University of Santa Maria , Santa Maria , Brazil
| | - Delmira B Wolff
- a Department of Sanitary and Environmental Engineering , Federal University of Santa Maria , Santa Maria , Brazil
| | - Ronaldo K Araújo
- a Department of Sanitary and Environmental Engineering , Federal University of Santa Maria , Santa Maria , Brazil
| | - Henrique B Faccenda
- b Postgraduate Program in Civil and Environmental Engineering , University of Passo Fundo , Passo Fundo , Brazil
| | - Taíse Perondi
- c Department of Research and Post-Graduation , Federal University of Technology - Paraná , Francisco Beltrão , Brazil
| | - Pablo H Sezerino
- d Department of Sanitary and Environmental Engineering , Federal University of Santa Catarina , Florianópolis , Brazil
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Almuktar SAAAN, Abed SN, Scholz M. Wetlands for wastewater treatment and subsequent recycling of treated effluent: a review. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:23595-23623. [PMID: 29959736 PMCID: PMC6096557 DOI: 10.1007/s11356-018-2629-3] [Citation(s) in RCA: 101] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2018] [Accepted: 06/20/2018] [Indexed: 05/23/2023]
Abstract
Due to water scarcity challenges around the world, it is essential to think about non-conventional water resources to address the increased demand in clean freshwater. Environmental and public health problems may result from insufficient provision of sanitation and wastewater disposal facilities. Because of this, wastewater treatment and recycling methods will be vital to provide sufficient freshwater in the coming decades, since water resources are limited and more than 70% of water are consumed for irrigation purposes. Therefore, the application of treated wastewater for agricultural irrigation has much potential, especially when incorporating the reuse of nutrients like nitrogen and phosphorous, which are essential for plant production. Among the current treatment technologies applied in urban wastewater reuse for irrigation, wetlands were concluded to be the one of the most suitable ones in terms of pollutant removal and have advantages due to both low maintenance costs and required energy. Wetland behavior and efficiency concerning wastewater treatment is mainly linked to macrophyte composition, substrate, hydrology, surface loading rate, influent feeding mode, microorganism availability, and temperature. Constructed wetlands are very effective in removing organics and suspended solids, whereas the removal of nitrogen is relatively low, but could be improved by using a combination of various types of constructed wetlands meeting the irrigation reuse standards. The removal of phosphorus is usually low, unless special media with high sorption capacity are used. Pathogen removal from wetland effluent to meet irrigation reuse standards is a challenge unless supplementary lagoons or hybrid wetland systems are used.
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Affiliation(s)
- Suhad A A A N Almuktar
- Civil Engineering Research Group, School of Computing, Science and Engineering, The University of Salford, Newton Building, Salford, England, M5 4WT, UK
- Department of Architectural Engineering, Faculty of Engineering, The University of Basrah, Al Basrah, Iraq
| | - Suhail N Abed
- Civil Engineering Research Group, School of Computing, Science and Engineering, The University of Salford, Newton Building, Salford, England, M5 4WT, UK
| | - Miklas Scholz
- Civil Engineering Research Group, School of Computing, Science and Engineering, The University of Salford, Newton Building, Salford, England, M5 4WT, UK.
- Division of Water Resources Engineering, Department of Building and Environmental Technology, Faculty of Engineering, Lund University, P.O. Box 118, 221 00, Lund, Sweden.
- Department of Civil Engineering Science, School of Civil Engineering and the Built Environment, University of Johannesburg, Kingsway Campus, Auckland Park, PO Box 524, Johannesburg, 2006, South Africa.
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23
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Lima MX, Carvalho KQ, Passig FH, Borges AC, Filippe TC, Azevedo JCR, Nagalli A. Performance of different substrates in constructed wetlands planted with E. crassipes treating low-strength sewage under subtropical conditions. THE SCIENCE OF THE TOTAL ENVIRONMENT 2018; 630:1365-1373. [PMID: 29554756 DOI: 10.1016/j.scitotenv.2018.02.342] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/11/2017] [Revised: 02/13/2018] [Accepted: 02/28/2018] [Indexed: 06/08/2023]
Abstract
The present study aimed to assess removal potential of chemical oxygen demand (COD), total Kjeldahl nitrogen (TKN), total ammonia nitrogen (TAN), total phosphorus (TP) and acetylsalicylic acid (ASA) in synthetic wastewater simulating low-strength sewage by sequencing-batch mode constructed wetlands (CWs). Six CWs with three substrates (gravel, light expanded clay and clay bricks) and one CW of each substrate was planted with E. crassipes to verify the feasibility of using a floating macrophyte in CWs and verify the best optimized substrate. Results showed that the presence of E. crassipes enhanced the removal of COD for systems with gravel, increasing the removal efficiency from 37% in the unplanted system (CWG-U) to 60% in the planted system (CWG-P). The vegetated CW with clay bricks (CWB-P) presented the best performance for both TKN and TAN removal, with maximum removal efficiencies of 68% and 35%, respectively. Phosphorus was observed to be efficiently removed in systems with clay bricks, both planted (CWB-U) and unplanted (CWB-P), with mean removal efficiencies of 82% and 87%, respectively, probably via adsorption. It was also observed that after 296days of operation, no desorption or increase on phosphorus in effluent samples were observed, thus indicating that the material was not yet saturated and phosphorus probably presents a strong binding to the media. ASA removal efficiency varied from 34% to 92% in CWs, probably due to plant uptake through roots and microbial biodegradation. Plant direct uptake varied from 4 to 74% of the total nitrogen and from 26 to 71% of the total phosphorus removed in CWG-P, CWC-P and CWB-P. E. crassipes was able to uptake up to 4.19g of phosphorus in CWC-P and 11.84g of nitrogen in CWB-P. The findings on this study suggest that E. crassipes could be used in CWs and clay bricks could significantly enhance phosphorus removal capacity in CWs.
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Affiliation(s)
- M X Lima
- The Federal University of Technology - Paraná (UTFPR), Civil Engineering Graduate Program, Deputado Heitor de Alencar Furtado St., 5000, Ecoville, 81280-340 Curitiba, Paraná, Brazil.
| | - K Q Carvalho
- The Federal University of Technology - Paraná (UTFPR), Civil Construction Academic Department, Deputado Heitor de Alencar Furtado St., 5000, Ecoville, 81280-340 Curitiba, Paraná, Brazil.
| | - F H Passig
- The Federal University of Technology - Paraná (UTFPR), Chemistry and Biology Academic Department, Deputado Heitor de Alencar Furtado St., 5000, Ecoville, 81280-340 Curitiba, Paraná, Brazil.
| | - A C Borges
- Federal University of Viçosa, Department of Agricultural Engineering, PH Rolfs Ave s/n, 36570-000 Viçosa, Minas Gerais, Brazil.
| | - T C Filippe
- The Federal University of Technology - Paraná (UTFPR), Environmental Sciences and Technology Graduate Program, Deputado Heitor de Alencar Furtado St., 5000, Ecoville, 81280-340 Curitiba, Paraná, Brazil
| | - J C R Azevedo
- The Federal University of Technology - Paraná (UTFPR), Chemistry and Biology Academic Department, Deputado Heitor de Alencar Furtado St., 5000, Ecoville, 81280-340 Curitiba, Paraná, Brazil.
| | - A Nagalli
- The Federal University of Technology - Paraná (UTFPR), Civil Construction Academic Department, Deputado Heitor de Alencar Furtado St., 5000, Ecoville, 81280-340 Curitiba, Paraná, Brazil.
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Leiva AM, Reyes-Contreras C, Vidal G. Influence of Agapanthus africanus on nitrification in a vertical subsurface flow constructed wetland. INTERNATIONAL JOURNAL OF PHYTOREMEDIATION 2018; 20:530-537. [PMID: 29688050 DOI: 10.1080/15226514.2017.1393390] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The aim of this study is to evaluate the influence of Agapanthus africanus (A. africanus) on nitrification in a vertical subsurface flow constructed wetlands (VSSFs) system. Two lab-scale VSSFs were operated: a) one was planted with A. africanus (vertical flow planted, VFP), and b) the other was unplanted (vertical flow control, VFC). The operation strategy was divided into three phases and consisted of increasing the ammoniacal nitrogen loading rate (ALR) (Phase I: 1.4; Phase II: 2.4; Phase III: 4.4 g NH4+-N·m-2·d-1). Nitrification was evaluated in the system at two different depths in the VSSFs (30.5 cm and 60.3 cm, from the top of the system). The removal efficiencies of COD, BOD5, TP, and PO4-3-P were above 40% in the VFP and VFC during all operation. The mean removal efficiencies of NH4+-N were above 70%. Nitrification was the principal NH4+-N removal mechanism in both systems and transformed more than 50% of the NH4+-N to NO3--N. In terms of the effect of A. africanus on NH4+-N removal during the three operational phases, nonsignificant differences between the two VSSFs were noted (p > 0.05). Thus, A. africanus did not influence nitrification. Finally, the analysis at different depths showed that nitrification occurred in the upper 30.5 cm.
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Affiliation(s)
- Ana María Leiva
- a Engineering and Biotechnology Environmental Group, Environmental Science Faculty & Center EULA-Chile, University of Concepción , Concepción , Chile
| | - Carolina Reyes-Contreras
- a Engineering and Biotechnology Environmental Group, Environmental Science Faculty & Center EULA-Chile, University of Concepción , Concepción , Chile
| | - Gladys Vidal
- a Engineering and Biotechnology Environmental Group, Environmental Science Faculty & Center EULA-Chile, University of Concepción , Concepción , Chile
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Rana V, Maiti SK. Municipal wastewater treatment potential and metal accumulation strategies of Colocasia esculenta (L.) Schott and Typha latifolia L. in a constructed wetland. ENVIRONMENTAL MONITORING AND ASSESSMENT 2018; 190:328. [PMID: 29730705 DOI: 10.1007/s10661-018-6705-4] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2018] [Accepted: 04/24/2018] [Indexed: 06/08/2023]
Abstract
This paper elucidates phytoremediation potential of two wetland plants (Colocasia esculenta (L.) Schott and Typha latifolia L.) for municipal wastewater treatment using constructed wetland (CW) mesocosms. The concentrations (mg L-1) of chemical oxygen demand (COD), total kjeldahl nitrogen (TKN), Cu, Cd, Cr, Zn, and Pb in municipal wastewater were higher than permissible Indian standards for inland surface water disposal; however, Mn and Ni were within the permissible limits. The pollutant removal efficiencies of planted CWs varied as electrical conductivity (EC) 67.8-71.4%; COD 70.7-71.1%; TKN 63.8-72.3%; Cu 75.3-83.4%; Cd 73.9-83.1%; Mn 74.1-74.5%; Cr 64.8-73.6%; Co 82.2-84.2%; Zn 63.3-66.1%; Pb 71.4-77.9%; and Ni 76-80%. Mass balance analysis revealed that the loss of metals from wastewater was equivalent to net accumulation in plants and natural degradation of metals. Metal accumulation strategies of plants were investigated using bioconcentration factor (BCF) and translocation factor (TF) of metals which indicated that both plants could be employed for phytostabilization (BCF > 1 and TF < 1) of Cu, Cd, Co, Pb, and Ni and phytoextraction (BCF > 1 and TF > 1) of Mn and Zn. The study demonstrated that a reduction of pollutants (except Pb) was observed within permissible levels (BIS) and suggested disposal of municipal wastewater into the inland surface water bodies after 20 days of treatment. The study concluded that both the plants could potentially be used for an efficient municipal wastewater treatment using constructed wetlands.
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Affiliation(s)
- Vivek Rana
- Department of Environmental Science and Engineering, Indian Institute of Technology (Indian School of Mines), Dhanbad, 826004, India
| | - Subodh Kumar Maiti
- Department of Environmental Science and Engineering, Indian Institute of Technology (Indian School of Mines), Dhanbad, 826004, India.
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He Y, Peng L, Hua Y, Zhao J, Xiao N. Treatment for domestic wastewater from university dorms using a hybrid constructed wetland at pilot scale. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:8532-8541. [PMID: 29313198 DOI: 10.1007/s11356-017-1168-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2017] [Accepted: 12/26/2017] [Indexed: 06/07/2023]
Abstract
A hybrid constructed wetland (CW) system was operated at pilot scale to evaluate the treatment of domestic wastewater from university dorms in Hubei province, China. The hybrid system consisted of an integrated vertical flow constructed wetland (IVF CW) (a down-flow VF CW and an up-flow VF CW) and a horizontal subsurface flow constructed wetland (HSF CW). The influent for the hybrid CW containing chemical oxygen demand (COD), total phosphorus (TP), total nitrogen (TN), and ammonium nitrogen (NH4+-N) with mean concentrations of 152, 0.75, 18.9, and 8.9 mg L-1, respectively, was purified by the hybrid CW system to achieve mean removal efficiencies of 59.0% COD, 82.8% TP, 57.7% TN, and 79.2% NH4+-N over a 9-month period. The nitrification intensity of the media in the down-flow VF CW was the highest compared to the other CWs, whereas the denitrification intensity of the media in the HSF CW was significantly higher than the IVF CW. The abundance of nitrifying bacteria in the media of the IVF CW was higher than in the HSF CW, while a higher abundance of denitrifying bacteria was found in the HSF CW compared to the IVF CW, suggesting that the HSF CW was more suitable for the growth of denitrifying bacteria.
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Affiliation(s)
- Yuting He
- College of Resources and Environment, Huazhong Agricultural University, No.1 Shizishan Street, Hongshan District, Wuhan, 430070, People's Republic of China
| | - Lian Peng
- College of Resources and Environment, Huazhong Agricultural University, No.1 Shizishan Street, Hongshan District, Wuhan, 430070, People's Republic of China
| | - Yumei Hua
- College of Resources and Environment, Huazhong Agricultural University, No.1 Shizishan Street, Hongshan District, Wuhan, 430070, People's Republic of China.
| | - Jianwei Zhao
- College of Resources and Environment, Huazhong Agricultural University, No.1 Shizishan Street, Hongshan District, Wuhan, 430070, People's Republic of China
| | - Naidong Xiao
- College of Resources and Environment, Huazhong Agricultural University, No.1 Shizishan Street, Hongshan District, Wuhan, 430070, People's Republic of China
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Du L, Trinh X, Chen Q, Wang C, Wang H, Xia X, Zhou Q, Xu D, Wu Z. Enhancement of microbial nitrogen removal pathway by vegetation in Integrated Vertical-Flow Constructed Wetlands (IVCWs) for treating reclaimed water. BIORESOURCE TECHNOLOGY 2018; 249:644-651. [PMID: 29091849 DOI: 10.1016/j.biortech.2017.10.074] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2017] [Revised: 10/10/2017] [Accepted: 10/18/2017] [Indexed: 06/07/2023]
Abstract
Constructed wetland is an efficient way to lower N load from wastewater treatment plants. Here, the nitrogen removal rate and nitrogen balance, as well as the microbial community structure in IVCWs planted with different vegetation for treating reclaimed water were investigated. The results showed that IVCWs planted with vegetation generally achieved a higher TN removal rate than unplanted treatment, especially for Canna indica L. with 10.35% enhancement. Moreover, the microbial process proportion (83.87-87.94%) is the main N removal pathway in IVCW, and vegetation planting could increase 8.16% of it in average. The combination of quantitative polymerase chain reaction (qPCR) and high-throughput sequencing analysis revealed that IVCW planted with Canna indica L. showed the highest microbial abundant and biodiversity. The related denitrification genus Pseudomonas, Acinetobacter, Rhizobium, Bacillus and Rhodopseudomonas might be responsible for the high biological removal rate of nitrogen.
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Affiliation(s)
- Lu Du
- College of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, PR China; State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, PR China
| | - Xuantung Trinh
- College of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, PR China; State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, PR China; Vietnam Maritime University, Haiphong 180000, Viet Nam
| | - Qianru Chen
- College of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, PR China; State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, PR China
| | - Chuan Wang
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, PR China; University of Chinese Academy of Sciences, Beijing 100039, PR China
| | - Huihui Wang
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, PR China; University of Chinese Academy of Sciences, Beijing 100039, PR China
| | - Xue Xia
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, PR China; University of Chinese Academy of Sciences, Beijing 100039, PR China
| | - Qiaohong Zhou
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, PR China.
| | - Dong Xu
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, PR China
| | - Zhenbin Wu
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, PR China
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Wang H, Zhong H, Bo G. Existing forms and changes of nitrogen inside of horizontal subsurface constructed wetlands. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:771-781. [PMID: 29063402 DOI: 10.1007/s11356-017-0477-1] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2017] [Accepted: 10/11/2017] [Indexed: 05/21/2023]
Abstract
Horizontal zeolite subsurface constructed wetland system (HZCWs) and horizontal limestone subsurface constructed wetland system (HLCWs) were applied to the removal of nitrogen in lightly polluted wastewater, and the existing forms, changes, and removal mechanism of nitrogen in the constructed wetlands were analyzed. The results indicated that compared with HLCWs, HZCWs exhibited better nitrogen removal effect, and the maximum removal rates of ammonia nitrogen and total nitrogen could reach 96.97 ± 5.29 and 93.12 ± 3.35%, respectively. Besides, analysis of the removal effect on nitrogen in different existing forms on different substrate heights in the constructed wetlands showed that variation of nitrogen removal efficiency had certain regularities, which were related to the interior construction features of the wetland systems, and agreed with the regularities in the changes of the influential factors such as DO inside of the wetlands. In addition, degradation mechanism of pollutions was also analyzed, and the results indicated that the quantity of microorganisms and enzymes, including FDA, catalase, and urease, on the surface of the substrates had significant influence on the removal regularities and effects of the major pollutions in constructed wetlands.
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Affiliation(s)
- Hao Wang
- College of Civil and Architectural Engineering, North China University of Science and Technology, Tangshan, People's Republic of China.
| | - Huiyuan Zhong
- College of Civil and Architectural Engineering, North China University of Science and Technology, Tangshan, People's Republic of China
| | - Guozhu Bo
- College of Civil and Architectural Engineering, North China University of Science and Technology, Tangshan, People's Republic of China
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29
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Zhao Z, Song X, Zhang Y, Zhao Y, Wang B, Wang Y. Effects of iron and calcium carbonate on contaminant removal efficiencies and microbial communities in integrated wastewater treatment systems. CHEMOSPHERE 2017; 189:10-20. [PMID: 28922630 DOI: 10.1016/j.chemosphere.2017.09.020] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2017] [Revised: 07/25/2017] [Accepted: 09/05/2017] [Indexed: 06/07/2023]
Abstract
In the paper, we explored the influences of different dosages of iron and calcium carbonate on contaminant removal efficiencies and microbial communities in algal ponds combined with constructed wetlands. After 1-year operation of treatment systems, based on the high-throughput pyrosequencing analysis of microbial communities, the optimal operating conditions were obtained as follows: the ACW10 system with Fe3+ (5.6 mg L-1), iron powder (2.8 mg L-1), and CaCO3 powder (0.2 mg L-1) in influent as the adjusting agents, initial phosphorus source (PO43-) in influent, the ratio of nitrogen to phosphorus (N/P) of 30 in influent, and hydraulic retention time (HRT) of 1 day. Total nitrogen (TN) removal efficiency and total phosphorus (TP) removal efficiency were improved significantly. The hydrolysis of CaCO3 promoted the physicochemical precipitation in contaminant removal. Meanwhile, Fe3+ and iron powder produced Fe2+, which improved contaminant removal. Iron ion improved the diversity, distribution, and metabolic functions of microbial communities in integrated treatment systems. In the treatment ACW10, the dominant phylum in the microbial community was PLANCTOMYCETES, which positively promoted nitrogen removal. After 5 consecutive treatments in ACW10, contaminant removal efficiencies for TN and TP respectively reached 80.6% and 57.3% and total iron concentration in effluent was 0.042 mg L-1.
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Affiliation(s)
- Zhimiao Zhao
- College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai, 201306, China; Engineering Research Center for Water Environment Ecology in Shanghai, Shanghai, 201306, China
| | - Xinshan Song
- College of Environmental Science and Engineering, Donghua University, State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry, Shanghai, 201620, China.
| | - Yinjiang Zhang
- College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai, 201306, China; Engineering Research Center for Water Environment Ecology in Shanghai, Shanghai, 201306, China
| | - Yufeng Zhao
- College of Environmental Science and Engineering, Donghua University, State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry, Shanghai, 201620, China
| | - Bodi Wang
- College of Environmental Science and Engineering, Donghua University, State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry, Shanghai, 201620, China
| | - Yuhui Wang
- College of Environmental Science and Engineering, Donghua University, State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry, Shanghai, 201620, China
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30
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Fountoulakis MS, Daskalakis G, Papadaki A, Kalogerakis N, Manios T. Use of halophytes in pilot-scale horizontal flow constructed wetland treating domestic wastewater. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2017; 24:16682-16689. [PMID: 28560626 DOI: 10.1007/s11356-017-9295-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2016] [Accepted: 05/17/2017] [Indexed: 06/07/2023]
Abstract
Recent findings encourage the use of halophytes in constructed wetlands for domestic wastewater treatment due to their special physiological characteristics as the ability to accumulate heavy metals and salts in their tissues makes them ideal candidates for constructed wetland vegetation. In this particular study, we investigated the application of halophytic plants in a horizontal flow constructed wetland for domestic wastewater treatment purposes. The pilot plant which was situated in Crete (Greece) was planted with a polyculture of halophytes (Tamarix parviflora, Juncus acutus, Sarcocornia perrenis, and Limoniastrum monopetalum). The system's performance was monitored for a period of 11 months during which it received primary treated wastewater from the local wastewater treatment plant. Results show that halophytes developed successfully in the constructed wetland and achieved organic matter and pathogen removal efficiencies comparable to those reported for reeds in previous works (63% and 1.6 log units, respectively). In addition, boron concentration in the effluent was reduced by 40% in comparison with the influent. Salinity as expressed by electrical conductivity did not change during the treatment, indicating that the accumulation of salts in the leaves is not able to overcome electrical conductivity increasing due to evapotranspiration. The results indicate an improvement in the treatment of domestic wastewater via the use of halophyte-planted CWs.
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Affiliation(s)
- Michael S Fountoulakis
- Department of Agriculture, Technological Educational Institute of Crete, Heraklion, Greece.
- TM Solutions Ltd, Heraklion, Greece.
| | - Giorgos Daskalakis
- Department of Agriculture, Technological Educational Institute of Crete, Heraklion, Greece
- TM Solutions Ltd, Heraklion, Greece
| | - Akrivi Papadaki
- Department of Agriculture, Technological Educational Institute of Crete, Heraklion, Greece
- TM Solutions Ltd, Heraklion, Greece
| | - Nicolas Kalogerakis
- School of Environmental Engineering, Technical University of Crete, Chania, Greece
| | - Thrassyvoulos Manios
- Department of Agriculture, Technological Educational Institute of Crete, Heraklion, Greece
- TM Solutions Ltd, Heraklion, Greece
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31
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Liang K, Dai Y, Wang F, Liang W. Seasonal variation of microbial community for the treatment of tail water in constructed wetland. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2017; 75:2434-2442. [PMID: 28541951 DOI: 10.2166/wst.2017.124] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Effects of seasons and hydraulic loading rates (HLR) on the treatment performance and the response of the microbial community of vertical flow constructed wetland treating tail water were investigated. The seasonal treatment performance was evaluated at four HLR of 125, 250, 375 and 500 mm/d, respectively. The microbial community was detected by MiSeq Illumina platform at HLR 125 and 375 mm/d. The wetland showed significantly higher chemical oxygen demand (COD) and total nitrogen (TN), total phosphorus (TP) at HLR 125 mm/d, compared with other HLR. Overall removal efficiency was 61.47%, 71.40% and 76.31% for COD, TN and TP, respectively, while no significant differences for COD, TN and TP removal were found at HLR of 250, 375 and 500 mm/d. The best removal efficiency for COD and TN was achieved in summer and autumn, while the best TP removal was achieved in winter. Nitrification bacteria (Nitrosomonas and Nitrospira) were significantly higher in HLR 125 mm/d, whereas sequences associated with denitrification had no significant difference at the two HLR. The results can partially explain the significantly higher NH4+-N removal in HLR 125 mm/d and relatively low nitrogen performance in winter.
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Affiliation(s)
- Kang Liang
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China E-mail:
| | - Yanran Dai
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China E-mail:
| | - Feihua Wang
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China E-mail:
| | - Wei Liang
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China E-mail:
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32
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Fountoulakis MS, Sabathianakis G, Kritsotakis I, Kabourakis EM, Manios T. Halophytes as vertical-flow constructed wetland vegetation for domestic wastewater treatment. THE SCIENCE OF THE TOTAL ENVIRONMENT 2017; 583:432-439. [PMID: 28117162 DOI: 10.1016/j.scitotenv.2017.01.090] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2016] [Revised: 01/13/2017] [Accepted: 01/14/2017] [Indexed: 06/06/2023]
Abstract
Recent findings show that halophytes have the ability to accumulate salts in their tissues, making them a very interesting group of plants for domestic wastewater treatment in constructed wetlands (CWs). In that case, it might be possible to reduce the salinity of the final effluent, which is a crucial parameter for wastewater reuse in agriculture. During this study three halophytes, Atriplex halimus, Juncus acutus and Sarcocornia perennis, were tested for phyto-desalination of domestic wastewater in a vertical flow constructed wetland (VFCW) and compared with common reeds (Phragmites australis). In addition, the effect of this alternative vegetation on the overall performance of the system regarding organic matter, nutrients, boron and pathogen removal was monitored. The organic loading rate (OLR) was about 21gCOD/m2/d and the hydraulic loading rate (HLR) was 95mm/d in both cases. Promising results were obtained for A. halimus, which shows high biomass productivity and significant capability to accumulate salts, mainly Na, in its tissues. A positive effect on pathogen removal efficiency was also recorded. However, nitrogen concentration in the effluent of the VFCW planted with halophytes was found to be higher than in the effluent of the VFCW planted with reeds. Finally, no significant effect on organic matter and phosphorus removal efficiency was observed from the use of halophytes in place of reeds.
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Affiliation(s)
- M S Fountoulakis
- Department of Viticulture, Horticulture and Plant Protection, Institute of Olive Tree, Subtropical Crops and Viticulture, Hellenic Agricultural Organization-"DΕMETER", Heraklion 71307, Greece; Department of Agricultural Technology, Technological Educational Institute of Crete, Heraklion 71410, Greece.
| | - G Sabathianakis
- Department of Agricultural Technology, Technological Educational Institute of Crete, Heraklion 71410, Greece
| | - I Kritsotakis
- Department of Viticulture, Horticulture and Plant Protection, Institute of Olive Tree, Subtropical Crops and Viticulture, Hellenic Agricultural Organization-"DΕMETER", Heraklion 71307, Greece
| | - E M Kabourakis
- Department of Viticulture, Horticulture and Plant Protection, Institute of Olive Tree, Subtropical Crops and Viticulture, Hellenic Agricultural Organization-"DΕMETER", Heraklion 71307, Greece
| | - T Manios
- Department of Agricultural Technology, Technological Educational Institute of Crete, Heraklion 71410, Greece
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Bohórquez E, Paredes D, Arias CA. Vertical flow-constructed wetlands for domestic wastewater treatment under tropical conditions: effect of different design and operational parameters. ENVIRONMENTAL TECHNOLOGY 2017; 38:199-208. [PMID: 27628332 DOI: 10.1080/09593330.2016.1230650] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
This study assessed the treatment of domestic wastewater to find the optimum vertical flow-constructed wetland (VFCW) configuration under tropical conditions. Eight pilot-scale configurations units were studied to compare between fine sand and medium gravel used as substrate, two feeding frequencies (20 pulses d-1 and 10 pulses d-1), and the presence or absence of tropical plants (Heliconia psittacorum). The results showed that the sand beds were significantly more efficient in the removal of organic matter, ammonia nitrogen, and total suspended solids than gravel beds, presenting average removal rates of 48 and 24 g m-2 d-1 of COD; 35 and 16 g m-2 d-1 of BOD5; 7 and 4 g m-2 d-1 of [Formula: see text]; 9 and 0 g m-2 d-1 for sand and gravel, respectively. The oxygen consumption rates were calculated and a value of 65 g m-2 d-1 was obtained for sand beds while for the gravel beds the consumption rate was 30 g m-2 d-1. The assessment of different kinds of nitrogen showed interesting dynamics in the nitrification processes. The presence of H. psittacorum showed positive effects in the total nitrogen (TN) removal. The different loading frequencies applied did not show significant statistical differences in the removal of the tested contaminants. Preliminary results were found in the pathogen removal, where the sand is favorable as the substrate. This work represents the first step in the research of optimum VFWC design and operation parameters for Colombia as well as the use of plants of the genus Heliconia.
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Affiliation(s)
- Eliana Bohórquez
- a Water and Sanitation Research Group, Faculty of Environmental Sciences , Universidad Tecnológica de Pereira , Pereira , Colombia
| | - Diego Paredes
- a Water and Sanitation Research Group, Faculty of Environmental Sciences , Universidad Tecnológica de Pereira , Pereira , Colombia
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Zhimiao Z, Xinshan S, Yanping X, Yufeng Z, Zhijie G, Fanda L, Yi D, Wei W, Tianling Q. Influences of seasons, N/P ratios and chemical compounds on phosphorus removal performance in algal pond combined with constructed wetlands. THE SCIENCE OF THE TOTAL ENVIRONMENT 2016; 573:906-914. [PMID: 27599054 DOI: 10.1016/j.scitotenv.2016.08.148] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2016] [Revised: 08/17/2016] [Accepted: 08/20/2016] [Indexed: 06/06/2023]
Abstract
Nitrogen (N) and phosphorous (P) are main contaminants and P removal was restrained by several factors: season, N/P, and chemical compounds (CCs) in water ecosystems. In this paper, two algal ponds combined with constructed wetlands were built to increase the removal performance. Different hydraulic retention time (HRT), different N/P and chemical compounds were chosen to investigate the influences of the above factors on the contaminant removal performance. The optimum phosphorus removal rate was 69.74% under the nitrogen removal of 92.85% in influent containing PO43- after 3-day HRT in algal pond combined with constructed wetlands. The investigation results indicated that these factors improved the nutrient removal efficiencies. Seasonal influence on the removal performance can be avoided by choosing the optimal HRT length of 3days. The higher N/P at 60 can improve the phosphorus removal and the lower N/P at 15 showed the stronger synergistic effect between phosphorus and nitrogen removals. Compared with PO3- and P2O74- in influent, PO43- affected phosphorus removal more significantly. The better linear fitting between organic phosphorus removal and nitrogen removal in influent contained P2O74- was found. Algae can absorb nutrients for growth, and oxygen release, microbial activity intensification and microbial carbon replenishment induced by algae will improve the performance. The study suggested that the control of HRTs, N/Ps, CCs, and algae might be an effective way to improve wastewater treatment performance.
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Affiliation(s)
- Zhao Zhimiao
- College of Environmental Science and Engineering, Donghua University, State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry, Shanghai 201620, China
| | - Song Xinshan
- College of Environmental Science and Engineering, Donghua University, State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry, Shanghai 201620, China.
| | - Xiao Yanping
- College of Environmental Science and Engineering, Donghua University, State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry, Shanghai 201620, China
| | - Zhao Yufeng
- College of Environmental Science and Engineering, Donghua University, State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry, Shanghai 201620, China
| | - Gong Zhijie
- College of Environmental Science and Engineering, Donghua University, State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry, Shanghai 201620, China
| | - Lin Fanda
- College of Environmental Science and Engineering, Donghua University, State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry, Shanghai 201620, China
| | - Ding Yi
- College of Environmental Science and Engineering, Donghua University, State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry, Shanghai 201620, China
| | - Wang Wei
- College of Environmental Science and Engineering, Donghua University, State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry, Shanghai 201620, China
| | - Qin Tianling
- China Institute of Water Resources and Hydropower Research, Beijing 100038, China
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Liu H, Hu Z, Zhang J, Ngo HH, Guo W, Liang S, Fan J, Lu S, Wu H. Optimizations on supply and distribution of dissolved oxygen in constructed wetlands: A review. BIORESOURCE TECHNOLOGY 2016; 214:797-805. [PMID: 27177713 DOI: 10.1016/j.biortech.2016.05.003] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2016] [Revised: 04/30/2016] [Accepted: 05/03/2016] [Indexed: 06/05/2023]
Abstract
Dissolved oxygen (DO) is one of the most important factors that can influence pollutants removal in constructed wetlands (CWs). However, problems of insufficient oxygen supply and inappropriate oxygen distribution commonly exist in traditional CWs. Detailed analyses of DO supply and distribution characteristics in different types of CWs were introduced. It can be concluded that atmospheric reaeration (AR) served as the promising point on oxygen intensification. The paper summarized possible optimizations of DO in CWs to improve its decontamination performance. Process (tidal flow, drop aeration, artificial aeration, hybrid systems) and parameter (plant, substrate and operating) optimizations are particularly discussed in detail. Since economic and technical defects are still being cited in current studies, future prospects of oxygen research in CWs terminate this review.
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Affiliation(s)
- Huaqing Liu
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science & Engineering, Shandong University, Jinan 250100, China
| | - Zhen Hu
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science & Engineering, Shandong University, Jinan 250100, China
| | - Jian Zhang
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science & Engineering, Shandong University, Jinan 250100, China.
| | - Huu Hao Ngo
- School of Civil and Environmental Engineering, University of Technology Sydney, Broadway, NSW 2007, Australia
| | - Wenshan Guo
- School of Civil and Environmental Engineering, University of Technology Sydney, Broadway, NSW 2007, Australia
| | - Shuang Liang
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science & Engineering, Shandong University, Jinan 250100, China
| | - Jinlin Fan
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science & Engineering, Shandong University, Jinan 250100, China
| | - Shaoyong Lu
- Research Centre of Lake Environment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
| | - Haiming Wu
- College of Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China
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36
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Hu Y, He F, Ma L, Zhang Y, Wu Z. Microbial nitrogen removal pathways in integrated vertical-flow constructed wetland systems. BIORESOURCE TECHNOLOGY 2016; 207:339-345. [PMID: 26897412 DOI: 10.1016/j.biortech.2016.01.106] [Citation(s) in RCA: 69] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/19/2015] [Revised: 01/25/2016] [Accepted: 01/28/2016] [Indexed: 06/05/2023]
Abstract
Microbial nitrogen (N) removal pathways in planted (Canna indica L.) and unplanted integrated vertical-flow constructed wetland systems (IVCWs) were investigated. Results of, molecular biological and isotope pairing experiments showed that nitrifying, anammox, and denitrifying bacteria were distributed in both down-flow and up-flow columns of the IVCWs. Further, the N transforming bacteria in the planted IVCWs were significantly higher than that in the unplanted ones (p<0.05). Moreover, the potential nitrification, anammox, and denitrification rates were highest (18.90, 11.75, and 7.84nmolNg(-1)h(-1), respectively) in the down-flow column of the planted IVCWs. Significant correlations between these potential rates and the absolute abundance of N transformation genes further confirmed the existence of simultaneous nitrification, anammox, and denitrification (SNAD) processes in the IVCWs. The anammox process was the major N removal pathway (55.6-60.0%) in the IVCWs. The results will further our understanding of the microbial N removal mechanisms in IVCWs.
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Affiliation(s)
- Yun Hu
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Feng He
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China.
| | - Lin Ma
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
| | - Yi Zhang
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
| | - Zhenbin Wu
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
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37
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Xu D, Gu J, Li Y, Zhang Y, Howard A, Guan Y, Li J, Xu H. Purifying capability, enzyme activity, and nitrification potentials in December in integrated vertical flow constructed wetland with earthworms and different substrates. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2016; 23:273-281. [PMID: 26573309 DOI: 10.1007/s11356-015-5734-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2014] [Accepted: 11/03/2015] [Indexed: 06/05/2023]
Abstract
The response of purifying capability, enzyme activity, nitrification potentials, and total number of bacteria in the rhizosphere in December to wetland plants, substrates, and earthworms was investigated in integrated vertical flow constructed wetlands (IVFCW). The removal efficiency of total nitrogen (TN), NH4-N, chemical oxygen demand (COD), and total phosphorus (TP) was increased when earthworms were added into IVFCW. A significantly average removal efficiency of N in IVFCW that employed river sand as substrate and in IVFCW that employed a mixture of river sand and Qing sand as substrate was not found. However, the average removal efficiency of P was higher in IVFCW with a mixture of river sand and Qing sand as substrate than in IVFCW with river sand as substrate. Invertase activity in December was higher in IVFCW that used a mixture of river sand and Qing sand as substrate than in IVFCW which used only river sand as substrate. However, urease activity, nitrification potential, and total number of bacteria in December was higher in IVFCW that employed river sand as substrate than in IVFCW with a mixture of river sand and Qing sand as substrate. The addition of earthworms into the integrated vertical flow constructed wetland increased the above-ground biomass, enzyme activity (catalase, urease, and invertase), nitrification potentials, and total number of bacteria in December. The above-ground biomass of wetland plants was significantly positively correlated with urease and nitrification potentials (p < 0.01). The addition of earthworms into IVFCW increased enzyme activity and nitrification potentials in December, which resulted in improving purifying capability.
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Affiliation(s)
- Defu Xu
- Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, Nanjing, 210044, China
- School of Environmental Science and Engineering, Nanjing University of Information Science & Technology, Nanjing, 210044, China
- Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, Nanjing, 210044, China
| | - Jiaru Gu
- School of Environmental Science and Engineering, Nanjing University of Information Science & Technology, Nanjing, 210044, China
| | - Yingxue Li
- Jiangsu Key Laboratory of Agricultural Meteorology, Nanjing University of Information Science & Technology, Nanjing, 210044, China.
| | - Yu Zhang
- School of Environmental Science and Engineering, Nanjing University of Information Science & Technology, Nanjing, 210044, China
| | - Alan Howard
- Department of Geography and Environmental Science, University of Reading, Reading, RG6 6AB, UK
| | - Yidong Guan
- School of Environmental Science and Engineering, Nanjing University of Information Science & Technology, Nanjing, 210044, China
| | - Jiuhai Li
- School of Environmental Science and Engineering, Nanjing University of Information Science & Technology, Nanjing, 210044, China
| | - Hui Xu
- School of Environmental Science and Engineering, Nanjing University of Information Science & Technology, Nanjing, 210044, China
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38
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Valipour A, Ahn YH. Constructed wetlands as sustainable ecotechnologies in decentralization practices: a review. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2016; 23:180-197. [PMID: 26527342 DOI: 10.1007/s11356-015-5713-y] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/17/2015] [Accepted: 10/28/2015] [Indexed: 06/05/2023]
Abstract
Recently, a range of novel and cost-effective engineered wetland technologies for decentralization practices of domestic wastewater treatment have been developed with ecological process modification, the use of functionalized plants, and advanced biofilm formation. However, selecting the one that can be more appreciated for on-site sanitation is still uncertain. This paper reviews the role of plants, media materials, microorganisms, and oxygen transfer in domestic wastewater purification through constructed wetlands (CWs). The effectiveness of traditional and recently developed CWs and the necessity of an induced biofilm attachment surface (BAS) in these systems for the treatment of domestic sewage are presented. This review also elucidates the idea of CWs for domestic wastewater characteristics highly stressed by total dissolved solids and the adaptive strategies in mitigating the cold climate impacts on their efficiencies. Further research needed to enhance the stability and sustainability of CWs is highlighted. By a more advanced investigation, BAS CWs can be specified as an ideal treatment process in decentralization.
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Affiliation(s)
- Alireza Valipour
- Department of Civil Engineering, Yeungnam University, Gyeongsan, 712-749, South Korea
| | - Young-Ho Ahn
- Department of Civil Engineering, Yeungnam University, Gyeongsan, 712-749, South Korea.
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Xu D, Wang L, Li H, Li Y, Howard A, Guan Y, Li J, Xu H. The forms and bioavailability of phosphorus in integrated vertical flow constructed wetland with earthworms and different substrates. CHEMOSPHERE 2015; 134:492-498. [PMID: 26025066 DOI: 10.1016/j.chemosphere.2015.04.099] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/22/2014] [Revised: 04/17/2015] [Accepted: 04/30/2015] [Indexed: 06/04/2023]
Abstract
A sequential extraction method was utilized to analyze seven forms of P in an integrated vertical-flow constructed wetland (IVFCW) containing earthworms and different substrates. The aluminum-bound P (Al-P) content was found to be lower, and the occluded P (Oc-P) content was higher in the IVFCW. The addition of earthworms into the influent chamber of IVFCW increased the exchange P (Ex-P), iron-bound P (Fe-P), calcium bound P (Ca-P), Oc-P, detritus-bound (De-P) and organic P (Org-P) content in the influent chamber, and also enhanced P content uptake by wetland plants. A significantly positive correlation between P content of above-ground wetland plants and the Ex-P, Fe-P, Oc-P and Org-P content in the rhizosphere was found (P<0.05), which indicated that the Ex-P, Fe-P, Oc-P and Org-P could be bio-available P. The Ex-P, Fe-P, De-P, Oc-P and Ca-P content of the influent chamber was higher where the substrate contained a mixture of Qing sand and river sand rather than only river sand. Also the IVFCW with earthworms and both Qing sand and river sand had a higher removal efficiency of P, which was related to higher P content uptake by wetland plants and P retained in IVFCW. These findings suggest that addition of earthworms in IVFCW increases the bioavailable P content, resulting in enhanced P content uptake by wetland plants.
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Affiliation(s)
- Defu Xu
- Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, Nanjing 210044, China; School of Environmental Science and Engineering, Nanjing University of Information Science & Technology, Nanjing 210044, China.
| | - Lin Wang
- Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, Nanjing 210044, China; School of Environmental Science and Engineering, Nanjing University of Information Science & Technology, Nanjing 210044, China
| | - Huili Li
- Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, Nanjing 210044, China; School of Environmental Science and Engineering, Nanjing University of Information Science & Technology, Nanjing 210044, China
| | - Yingxue Li
- Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, Nanjing 210044, China; School of Environmental Science and Engineering, Nanjing University of Information Science & Technology, Nanjing 210044, China
| | - Alan Howard
- Department of Geography and Environmental Science, University of Reading, Reading RG6 6AB, UK
| | - Yidong Guan
- Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, Nanjing 210044, China; School of Environmental Science and Engineering, Nanjing University of Information Science & Technology, Nanjing 210044, China
| | - Jiuhai Li
- Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, Nanjing 210044, China; School of Environmental Science and Engineering, Nanjing University of Information Science & Technology, Nanjing 210044, China
| | - Hui Xu
- Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, Nanjing 210044, China; School of Environmental Science and Engineering, Nanjing University of Information Science & Technology, Nanjing 210044, China
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40
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Zhang DQ, Jinadasa KBSN, Gersberg RM, Liu Y, Tan SK, Ng WJ. Application of constructed wetlands for wastewater treatment in tropical and subtropical regions (2000-2013). J Environ Sci (China) 2015; 30:30-46. [PMID: 25872707 DOI: 10.1016/j.jes.2014.10.013] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2014] [Revised: 10/17/2014] [Accepted: 10/17/2014] [Indexed: 06/04/2023]
Abstract
Constructed wetlands (CWs) have been successfully used for treating various wastewaters for decades and have been identified as a sustainable wastewater management option for developing countries. With the goal of promoting sustainable engineered systems that support human well-being but are also compatible with sustaining natural (environmental) systems, the application of CWs has become more relevant. Such application is especially significant for developing countries with tropical climates, which are very conducive to higher biological activity and productivity, resulting in higher treatment efficiencies compared to those in temperate climates. This paper therefore highlights the practice, applications, and research of treatment wetlands under tropical and subtropical conditions since 2000. In the present review, removal of biochemical oxygen demand (BOD) and total suspended solid (TSS) was shown to be very efficient and consistent across all types of treatment wetlands. Hybrid systems appeared more efficient in the removal of total suspended solid (TSS) (91.3%), chemical oxygen demand (COD) (84.3%), and nitrogen (i.e., 80.7% for ammonium (NH)4-N, 80.8% for nitrate (NO)3-N, and 75.4% for total nitrogen (TN)) as compared to other wetland systems. Vertical subsurface flow (VSSF) CWs removed TSS (84.9%), BOD (87.6%), and nitrogen (i.e., 66.2% for NH4-N, 73.3% for NO3-N, and 53.3% for TN) more efficiently than horizontal subsurface flow (HSSF) CWs, while HSSF CWs (69.8%) showed better total phosphorus (TP) removal compared to VSSF CWs (60.1%). Floating treatment wetlands (FTWs) showed comparable removal efficiencies for BOD (70.7%), NH4-N (63.6%), and TP (44.8%) to free water surface (FWS) CW systems.
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Affiliation(s)
- Dong-Qing Zhang
- Advanced Environmental Biotechnology Centre, Nanyang Environment & Water Research Institute, Nanyang Technological University, 1 CleanTech Loop, #06-10, 637141, Singapore.
| | - K B S N Jinadasa
- Department of Civil Engineering, University of Peradeniya, Peradeniya 20400, Sri Lanka
| | - Richard M Gersberg
- Graduate School of Public Health, San Diego State University, Hardy Tower 119, 5500 Campanile, San Diego, CA 92182-4162, USA
| | - Yu Liu
- Advanced Environmental Biotechnology Centre, Nanyang Environment & Water Research Institute, Nanyang Technological University, 1 CleanTech Loop, #06-10, 637141, Singapore
| | - Soon Keat Tan
- Advanced Environmental Biotechnology Centre, Nanyang Environment & Water Research Institute, Nanyang Technological University, 1 CleanTech Loop, #06-10, 637141, Singapore
| | - Wun Jern Ng
- Advanced Environmental Biotechnology Centre, Nanyang Environment & Water Research Institute, Nanyang Technological University, 1 CleanTech Loop, #06-10, 637141, Singapore
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41
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Chang JJ, Wu SQ, Liang K, Wu Z, Liang W. Comparative study of microbial community structure in integrated vertical-flow constructed wetlands for treatment of domestic and nitrified wastewaters. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2015; 22:3518-3527. [PMID: 25245259 DOI: 10.1007/s11356-014-3594-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2014] [Accepted: 09/10/2014] [Indexed: 06/03/2023]
Abstract
Microbial processes play a vital important role in the removal of contaminants in constructed wetland (CW). However, the microbial physiology and community structure can be influenced by environmental conditions. In this study, four pilot-scale integrated vertical-flow constructed wetlands (IVCWs) were employed to treat domestic and nitrified wastewaters. The microbial properties, along with their response to wastewater quality characteristics and seasonal variation, were determined. The results showed higher Shannon-Weiner diversity (H) and evenness (E) index of fatty acids (FAs), and relative abundances of signature FAs in down-flow cells and in the systems fed with domestic wastewater (DW). The relative abundances of fungi and gram-negative and aerobic bacteria were greater in up-flow cells. The dominant anaerobic bacteria found in most cells might be accounted for the prevailing anaerobic environment within the wetland beds, which could mean that the system fed with nitrified wastewater (NW) should perform better in nitrogen removal. The redundancy analysis (RDA) showed that pollutant concentrations, especially organic matter, influence the FA compositions greatly, and the most significant difference of microbial community structures was detected in down-flow cells fed with DW and up-flow ones with NW. The branched FAs, which could be used to represent anaerobic bacteria, were observed in down-flow cells treating DW and had a significant positive correlation with chemical oxygen demand (COD) concentration, probably suggesting the important role of anaerobic bacteria in organic matter degradation in the IVCWs. Seasonal variation, however, did not greatly influence the microbial community structure in the IVCWs.
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Affiliation(s)
- Jun-Jun Chang
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, China
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42
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Effectiveness of Domestic Wastewater Treatment Using a Bio-Hedge Water Hyacinth Wetland System. WATER 2015. [DOI: 10.3390/w7010329] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Zhong F, Wu J, Dai Y, Xiang D, Cheng S, Ji H. Performance evaluation of wastewater treatment using horizontal subsurface flow constructed wetlands optimized by micro-aeration and substrate selection. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2015; 71:1317-1324. [PMID: 25945847 DOI: 10.2166/wst.2015.090] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The effects of micro-aeration and substrate selection on domestic sewage treatment performance were explored using three pairs (with or without micro-aeration) of horizontal subsurface flow (HSSF) constructed wetlands (CWs) filled with zeolite, ceramsite or quartz granules. The individual and combined effects of micro-aeration and substrate selection on the purification performance of the experimental-scale HSSF CWs were evaluated. The results showed that micro-aeration significantly increased the treatment efficiencies for chemical oxygen demand, total nitrogen, total phosphorus (TP), ortho-phosphate (PO4(3-)-P) and ammonium nitrogen (NH4+-N) using HSSF CWs, while the substrate selection significantly affected the TP, PO4(3-)-P and NH4+-N removal efficiencies (p<0.05). A two-way analysis of variance (ANOVA) indicated that there was a significant interaction term (i.e. micro-aeration×substrate selection) for NH4+-N removal (p<0.05). Among the three substrates, ceramsite was the best substrate for the treatment of domestic sewage using HSSF CWs. Therefore, the results of this study suggest that a ceramsite-filled HSSF CW with micro-aeration could be the optimal configuration for decentralized domestic sewage treatment.
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Affiliation(s)
- Fei Zhong
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China E-mail: ; Marine Fisheries Research Institute of Jiangsu Province, Nantong 226007, China
| | - Juan Wu
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China E-mail:
| | - Yanran Dai
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China E-mail:
| | - Dongfang Xiang
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China E-mail:
| | - Shuiping Cheng
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China E-mail:
| | - Hongjiu Ji
- Marine Fisheries Research Institute of Jiangsu Province, Nantong 226007, China
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44
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Chang JJ, Liang K, Wu SQ, Zhang SH, Liang W. Comparative evaluations of organic matters and nitrogen removal capacities of integrated vertical-flow constructed wetlands: Domestic and nitrified wastewater treatment. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART A, TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING 2015; 50:757-766. [PMID: 25901854 DOI: 10.1080/10934529.2015.1012009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Two groups of integrated vertical-flow constructed wetland (IVCW) microcosms were established for treating two types of representative wastewater: domestic and nitrified wastewater under two loading rates (LRs) over about two years. Their removal capacities of organic substance and nitrogen as well as the effects of loading rate (LR), outflow temperature and dissolved oxygen (DO) concentration were investigated and compared. Efficient chemical oxygen demand (COD) eliminations were achieved by the IVCWs, with the mass removal rates increasing linearly with the increasing LRs strongly, achieving average value of 56.07 g m(-2) d(-1) at the highest loading rate. Nevertheless, the effluent COD concentrations also increased, with the average value exceeding Class I A discharge standard (< 50 mg L(-1)) for municipal wastewater treatment plants in China at the highest loading rate. Greater total nitrogen (TN) mass removal rates but lower efficiencies were obtained at the high LR for both types of wastewater, and better removal was achieved for nitrified wastewater (NW) in comparison to domestic wastewater (DW), probably due to the prevailing anoxic conditions inside the IVCW beds restricted nitrification process of DW. The influences of LR, temperature and DO on COD removal were slight, but all remarkable on TN reduction. As compared to DO, temperature was more crucial for nitrogen removal, and the temperature dependence coefficient for TN removal of low LR of NW was significantly greater than others.
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Affiliation(s)
- Jun J Chang
- a Research Institute of Engineering and Technology, Yunnan University , Kunming , China
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45
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Zhang DQ, Jinadasa KBSN, Gersberg RM, Liu Y, Ng WJ, Tan SK. Application of constructed wetlands for wastewater treatment in developing countries--a review of recent developments (2000-2013). JOURNAL OF ENVIRONMENTAL MANAGEMENT 2014; 141:116-31. [PMID: 24784754 DOI: 10.1016/j.jenvman.2014.03.015] [Citation(s) in RCA: 113] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2013] [Revised: 03/06/2014] [Accepted: 03/13/2014] [Indexed: 05/03/2023]
Abstract
Inadequate access to clean water and sanitation has become one of the most pervasive problems afflicting people throughout the developing world. Replication of centralized water-, energy- and cost-intensive technologies has proved ineffective in resolving the complex water-related problems resulting from rapid urbanization in the developing countries. Instead constructed wetlands (CWs) have emerged and become a viable option for wastewater treatment, and are currently being recognized as attractive alternatives to conventional wastewater treatment methods. The primary objective of this review is to present a comprehensive overview of the diverse range of practice, applications and researches of CW systems for removing various contaminants from wastewater in developing countries, placing them in the overall context of the need for low-cost and sustainable wastewater treatment systems. Emphasis of this review is placed on the treatment performance of various types of CWs including: (i) free water surface flow CW; (ii) subsurface flow CW; (iii) hybrid systems; and, (iv) floating treatment wetland. The impacts of different wetland design and pertinent operational variables (e.g., hydraulic loading rate, vegetation species, physical configurations, and seasonal variation) on contaminant removal in CW systems are also summarized and highlighted. Finally, the cost and land requirements for CW systems are critically evaluated.
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Affiliation(s)
- Dong Qing Zhang
- Advanced Environmental Biotechnology Centre, Nanyang Environment and Water Research Institute, School of Civill and Environmental Engineering, Nanyang Technological University, 1 CleanTech Loop, #06-10, Singapore 637141, Singapore.
| | - K B S N Jinadasa
- Department of Civil Engineering, University of Peradeniya, Peradeniya 20400, Sri Lanka
| | - Richard M Gersberg
- Graduate School of Public Health, San Diego State University, Hardy Tower 119, 5500 Campanile, San Diego, CA 92182-4162, USA
| | - Yu Liu
- Advanced Environmental Biotechnology Centre, Nanyang Environment and Water Research Institute, School of Civill and Environmental Engineering, Nanyang Technological University, 1 CleanTech Loop, #06-10, Singapore 637141, Singapore
| | - Wun Jern Ng
- Advanced Environmental Biotechnology Centre, Nanyang Environment and Water Research Institute, School of Civill and Environmental Engineering, Nanyang Technological University, 1 CleanTech Loop, #06-10, Singapore 637141, Singapore
| | - Soon Keat Tan
- Advanced Environmental Biotechnology Centre, Nanyang Environment and Water Research Institute, School of Civill and Environmental Engineering, Nanyang Technological University, 1 CleanTech Loop, #06-10, Singapore 637141, Singapore; Maritime Research Centre, School of Civil and Environmental Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore.
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46
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Guo Y, Liu Y, Zeng G, Hu X, Li X, Huang D, Liu Y, Yin Y. A restoration-promoting integrated floating bed and its experimental performance in eutrophication remediation. J Environ Sci (China) 2014; 26:1090-1098. [PMID: 25079639 DOI: 10.1016/s1001-0742(13)60500-8] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2013] [Revised: 07/10/2013] [Accepted: 08/02/2013] [Indexed: 06/03/2023]
Abstract
Numerous studies on eutrophication remediation have mainly focused on purifying water first, then restoring submerged macrophytes. A restoration-promoting integrated floating bed (RPIFB) was designed to combine the processes of water purification and macrophyte restoration simultaneously. Two outdoor experiments were conducted to evaluate the ecological functions of the RPIFB. Trial 1 was conducted to compare the eutrophication purification among floating bed, gradual-submerging bed (GSB) and RPIFB technologies. The results illustrated that RPIFB has the best purification capacity. Removal efficiencies of RPIFB for TN, TP, NH(+)4-N, NO(-)3-N, CODCr, Chlorophyll-a and turbidity were 74.45%, 98.31%, 74.71%, 88.81%, 71.42%, 90.17% and 85%, respectively. In trial 2, influences of depth of GSB and photic area in RPIFB on biota were investigated. When the depth of GSB decreased and the photic area of RPIFB grew, the height of Potamogeton crispus Linn. increased, but the biomass of Canna indica Linn. was reduced. The mortalities of Misgurnus anguillicaudatus and Bellamya aeruginosa in each group were all less than 7%. All results indicated that when the RPIFB was embedded into the eutrophic water, the regime shift from phytoplankton-dominated to macrophyte-dominated state could be promoted. Thus, the RPIFB is a promising remediation technology for eutrophication and submerged macrophyte restoration.
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Affiliation(s)
- Yiming Guo
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, China.
| | - Yunguo Liu
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, China.
| | - Guangming Zeng
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, China
| | - Xinjiang Hu
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, China
| | - Xin Li
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, China
| | - Dawei Huang
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, China
| | - Yunqin Liu
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, China
| | - Yicheng Yin
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, China
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47
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Thongtha S, Teamkao P, Boonapatcharoen N, Tripetchkul S, Techkarnjararuk S, Thiravetyan P. Phosphorus removal from domestic wastewater by Nelumbo nucifera Gaertn. and Cyperus alternifolius L. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2014; 137:54-60. [PMID: 24603027 DOI: 10.1016/j.jenvman.2014.02.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2013] [Revised: 12/18/2013] [Accepted: 02/02/2014] [Indexed: 06/03/2023]
Abstract
Domestic wastewater is a source of phosphorus contamination that causes eutrophication when it contaminates aquatic environments. Nelumbo nucifera Gaertn. and Cyperus alternifolius L. were applied for phosphorus removal from domestic wastewater. From the study, phosphorus in domestic wastewater was removed from the initial concentration of 1.038 ± 0.001 mgL(-1) to 0.094 ± 0.001 and 0.048 ± 0.004 mgL(-1) by N. nucifera and C. alternifolius, respectively, within 5 days. In addition, total Kjeldahl nitrogen (TKN) and chemical oxygen demand (COD) also decreased when wetland systems were applied the same as treatment with conventional method (chemical + activated sludge process). However, the plant removed TDS better than the conventional method. During 5 cycles of exposure, the two plants still survived and were healthy. The weight of plants increased after the experiment from 4060 ± 0.05 g to 4820 ± 0.17 g of N. nucifera, and from 4000 ± 0.00 g to 4600 ± 0.14 g of C. alternifolius. Phosphorus content also increased in both plants after the experiment. However, in the wetland system, phosphorus was removed mainly by the soil, followed by the plants, and then microorganisms. The domain group in the microbial community of both wetland systems was Pseudomas sp.
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Affiliation(s)
- S Thongtha
- School of Bioresources and Technology, King Mongkut's University of Technology Thonburi, Bangkok 10150, Thailand
| | - P Teamkao
- Department of Plant Production Technology, Faculty of Agricultural Technology, King Mongkut's Institute of Technology Ladkrabang, Bangkok 10520, Thailand
| | - N Boonapatcharoen
- Excellent Center of Waste Utilization and Management, King Mongkut's University of Technology Thonburi, Bangkok 10150, Thailand
| | - S Tripetchkul
- School of Bioresources and Technology, King Mongkut's University of Technology Thonburi, Bangkok 10150, Thailand
| | - S Techkarnjararuk
- Biochemical Chemical Engineering and Pilot Plant Research Development Unit (BEC), Pilot Plant Development and Training Institute, King Mongkut's University of Technology Thonburi, Bangkok 10150, Thailand
| | - P Thiravetyan
- School of Bioresources and Technology, King Mongkut's University of Technology Thonburi, Bangkok 10150, Thailand.
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Saeed T, Al-Muyeed A, Afrin R, Rahman H, Sun G. Pollutant removal from municipal wastewater employing baffled subsurface flow and integrated surface flow-floating treatment wetlands. J Environ Sci (China) 2014; 26:726-736. [PMID: 25079402 DOI: 10.1016/s1001-0742(13)60476-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2013] [Revised: 08/15/2013] [Accepted: 08/16/2013] [Indexed: 06/03/2023]
Abstract
This article reports pollutant removal performances of baffled subsurface flow, and integrated surface flow-floating treatment wetland units, when arranged in series for the treatment of municipal wastewater in Bangladesh. The wetland units (of the hybrid system) included organic, inorganic media, and were planted with nineteen types of macrophytes. The wetland train was operated under hydraulic loading fluctuation and seasonal variation. The performance analyses (across the wetland units) illustrated simultaneous denitrification and organics removal rates in the first stage vertical flow wetland, due to organic carbon leaching from the employed organic media. Higher mean organics removal rates (656.0 g COD/(m(2)·day)) did not completely inhibit nitrification in the first stage vertical flow system; such pattern could be linked to effective utilization of the trapped oxygen, as the flow was directed throughout the media by the baffle walls. Second stage horizontal flow wetland showed enhanced biodegradable organics removal, which depleted organic carbon availability for denitrification. The final stage integrated wetland system allowed further nitrogen removal from wastewater, via nutrient uptake by plant roots (along with nitrification), and generation of organic carbon (by the dead macrophytes) to support denitrification. The system achieved higher E. coli mortality through protozoa predation, E. coli oxidation, and destruction by UV radiation. In general, enhanced pollutant removal efficiencies as demonstrated by the structurally modified hybrid wetland system signify the necessity of such modification, when operated under adverse conditions such as: substantial input organics loading, hydraulic loading fluctuation, and seasonal variation.
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Affiliation(s)
- Tanveer Saeed
- Department of Civil Engineering, Ahsanullah University of Science and Technology, Dhaka 1208, Bangladesh.
| | - Abdullah Al-Muyeed
- Department of Civil Engineering, Ahsanullah University of Science and Technology, Dhaka 1208, Bangladesh
| | - Rumana Afrin
- Department of Civil Engineering, Ahsanullah University of Science and Technology, Dhaka 1208, Bangladesh
| | - Habibur Rahman
- Department of Civil Engineering, Bangladesh University of Engineering and Technology, Dhaka 1000, Bangladesh
| | - Guangzhi Sun
- School of Engineering and Physical Sciences, James Cook University, Townsville, QLD 4811, Australia
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Nsanganwimana F, Marchand L, Douay F, Mench M. Arundo donax L., a candidate for phytomanaging water and soils contaminated by trace elements and producing plant-based feedstock. A review. INTERNATIONAL JOURNAL OF PHYTOREMEDIATION 2014; 16:982-1017. [PMID: 24933898 DOI: 10.1080/15226514.2013.810580] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Plants and associated microorganisms are used to remediate anthropogenic metal(loid) contamination of water, soils and sediments. This review focuses on the potential of Arundo donax L. (Giant reed) for alleviating risks due to soils, water, and sediments contaminated by trace elements (TE), with emphasis on its advantages and limits over macrophytes and perennial grasses used for bioenergy and plant-based feedstock. Arundo donax is relevant to phytomanage TE-contaminated matrices, notably in its native area, as it possesses characteristics of large biomass production even under nutrient and abiotic stresses, fast growth rate, TE tolerance and accumulation mainly in below ground plant parts. Cultivating A. donax on contaminated lands and in constructed wetlands can contribute to increase land availability and limit the food vs. plant-based feedstock controversy. To gain more tools for decision-taking and sustainable management,further researches on A. donax should focus on: interactions between roots, TE exposure, and rhizosphere and endophytic microorganisms; biomass response to (a)biotic factors; sustainable agricultural practices on marginal and contaminated land; integration into local, efficient, energy and biomass conversion chains with concern to biomass quality and production; Life-Cycle Assessment including contaminant behavior, as well as environmental, agricultural and socio-economic benefits and drawbacks.
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50
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Jamshidi S, Akbarzadeh A, Woo KS, Valipour A. Wastewater treatment using integrated anaerobic baffled reactor and Bio-rack wetland planted with Phragmites sp. and Typha sp. JOURNAL OF ENVIRONMENTAL HEALTH SCIENCE & ENGINEERING 2014; 12:131. [PMID: 25379186 PMCID: PMC4212116 DOI: 10.1186/s40201-014-0131-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2014] [Accepted: 10/15/2014] [Indexed: 05/13/2023]
Abstract
The purpose of this study is to examine the potential use of anaerobic baffled reactor (ABR) followed by Bio-rack wetland planted with Phragmites sp. and Typha sp. for treating domestic wastewater generated by small communities (751 mg COD/L, 500 SCOD mg/L, 348 mg BOD5/L). Two parallel laboratory-scale models showed that the process planted with Phragmites sp. and Typha sp. are capable of removing COD by 87% & 86%, SCOD by 90% & 88%, BOD5 by 93% & 92%, TSS by 88% & 86%, TN by 79% & 77%, PO4-P by 21% & 14% at an overall HRT of 21 (843 g COD/m(3)/day & 392 g BOD5/m(3)/day) and 27 (622 g COD/m(3)/day & 302 g BOD5/m(3)/day) hours, respectively. Microbial analysis indicated a high reduction in the MPN of total coliform and TVC as high as 99% at the outlet end of the processes. The vegetated system using Phragmites sp. showed significantly greater (p <0.05) pollutant removal efficiencies due to its extensive root and mass growth rate (p <0.05) of the plant compared to Typha sp. The Phragmites sp. indicated a higher relative growth rate (3.92%) than Typha sp. (0.90%). Microorganisms immobilized on the surface of the Bio-rack media (mean TVC: 2.33 × 10(7) cfu/cm(2)) were isolated, identified and observed using scanning electron microscopy (SEM). This study illustrated that the present integrated processes could be an ideal approach for promoting a sustainable decentralization, however, Phragmites sp. would be more efficient rather than Typha sp.
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Affiliation(s)
- Shervin Jamshidi
- />Department of Environmental Engineering, Faculty of Environment, University of Tehran, Tehran, Iran
| | | | - Kwang-Sung Woo
- />Department of Civil Engineering, Yeungnam University, Gyungsan, South Korea
| | - Alireza Valipour
- />Department of Civil Engineering, Yeungnam University, Gyungsan, South Korea
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