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Qu Y, Yang Y, Sonne C, Chen X, Yue X, Gu H, Lam SS, Peng W. Phytosphere purification of urban domestic wastewater. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2023; 336:122417. [PMID: 37598935 DOI: 10.1016/j.envpol.2023.122417] [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: 05/29/2023] [Revised: 07/26/2023] [Accepted: 08/18/2023] [Indexed: 08/22/2023]
Abstract
Industrialization and overpopulation have polluted aquatic environments with significant impacts on human health and wildlife. The main pollutants in urban sewage are nitrogen, phosphorus, heavy metals and organic pollutants, which need to be treated with sewage, and the use of aquatic plants to purify wastewater has high efficiency and low cost. However, the effectiveness and efficiency of phytoremediation are also affected by temperature, pH, microorganisms and other factors. The use of biochar can reduce the cost of wastewater purification, and the combination of biochar and nanotechnology can improve the efficiency of wastewater purification. Some aquatic plants can enrich pollutants in wastewater, so it can be considered to plant these aquatic plants in constructed wetlands to achieve the effect of purifying wastewater. Biochar treatment technology can purify wastewater with high efficiency and low cost, and can be further applied to constructed wetlands. In this paper, the latest research progress of various pollutants in wastewater purification by aquatic plants is reviewed, and the efficient treatment technology of wastewater by biochar is discussed. It provides theoretical basis for phytoremediation of urban sewage pollution in the future.
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Affiliation(s)
- Yimeng Qu
- Henan Province International Collaboration Lab of Forest Resources Utilization,School of Forestry,Henan Agricultural University,Zhengzhou 450002,China
| | - Yafeng Yang
- Henan Province International Collaboration Lab of Forest Resources Utilization,School of Landscape Architecture,Henan Agricultural University,Zhengzhou 450002,China
| | - Christian Sonne
- Department of Ecoscience, Aarhus University, Frederiksborgvej 399, Roskilde DK-4000, Denmark; Sustainability Cluster, School of Engineering, University of Petroleum & Energy Studies, Dehradun, Uttarakhand 248007, India
| | - Xiangmeng Chen
- Henan Province International Collaboration Lab of Forest Resources Utilization,School of Science,Henan Agricultural University,Zhengzhou 450002,China
| | - Xiaochen Yue
- Henan Province International Collaboration Lab of Forest Resources Utilization,School of Forestry,Henan Agricultural University,Zhengzhou 450002,China
| | - Haiping Gu
- Henan Province International Collaboration Lab of Forest Resources Utilization,School of Forestry,Henan Agricultural University,Zhengzhou 450002,China
| | - Su Shiung Lam
- Higher Institution Centre of Excellence (HICoE), Institute of Tropical Aquaculture and Fisheries (AKUATROP), Universiti Malaysia Terengganu, 21030 Kuala Nerus, Terengganu, Malaysia; Department of Chemical Engineering and Materials Science, Yuan Ze University, Taoyuan, Taiwan; Center for Global Health Research (CGHR), Saveetha Institute of Medical and Technical Sciences (SIMATS), Saveetha University, Chennai, India
| | - Wanxi Peng
- Henan Province International Collaboration Lab of Forest Resources Utilization,School of Forestry,Henan Agricultural University,Zhengzhou 450002,China.
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Li Y, Shi C, Wei D, Ding J, Xu N, Jin L, Wang L. Associations of soil bacterial diversity and function with plant diversity in Carex tussock wetland. Front Microbiol 2023; 14:1142052. [PMID: 37089570 PMCID: PMC10115198 DOI: 10.3389/fmicb.2023.1142052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2023] [Accepted: 02/10/2023] [Indexed: 03/05/2023] Open
Abstract
Some species of Carex can form tussocks, which are usually distributed in valleys and flood plains. The soil microbial community diversity and function of micro–habitats formed by tussocks are associated with plant diversity, and research on these associations can guide Carex tussock wetland restoration. In this study, we selected tussock wetlands dominated by Carex appendiculata, including natural wetlands (NW), artificially restored wetlands (ARW), and naturally restored wetlands (NRW), and investigated plant diversity. Soil samples were collected from the quadrats of each sample plot with the maximum (ma), median (me), and minimum (mi) plant Shannon index values, and high-throughput sequencing was used to analyze the bacterial community composition, diversity, and functions. The plant diversity indexes of neither ARW nor NRW significantly differed from that of NW, but the companion species in NRW were hygrophytes and mesophytes, in contrast to only hygrophytes serving as companion species in NW and ARW. The soil bacterial communities at the operational taxonomic unit level of the nine quadrats with different plant Shannon index values significantly (p < 0.01) differed. The relative abundances of the dominant phyla (Proteobacteria, Chloroflexi, and Bacteroidetes) and the dominant genera (Geobacter, Sideroxydans, and Clostridium except for unassigned genera) significantly (p < 0.05) differed under the different levels of plant diversity. The plant Shannon index, soil moisture content, total organic carbon, N, and P were significantly (p < 0.05 or p < 0.01) correlated with the bacterial Shannon index. The phylogenetic diversity of the bacterial community in NW was significantly (p < 0.0001) different from those in ARW and NRW, and that in ARW was also significantly (p < 0.05) different from that in NRW. The functional groups of bacterial communities associated with plant diversity. In the NWme, ARWme, and NRWme bacterial communities, the relative proportions of functional groups related to soil N cycle were higher, but those related to soil S and C cycles were lower. Considering the rehabilitation of both plant and microbial communities, the methods used for establishing the ARW are recommended for Carex tussock wetland restoration.
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Affiliation(s)
- Yan Li
- Institute of Plant Nutrition, Resources and Environment, Beijing Academy of Agriculture and Forestry Sciences, Beijing, China
| | - Chuanqi Shi
- Heilongjiang Province Key Laboratory of Cold Region Wetland Ecology and Environment Research, Harbin University, Harbin, Heilongjiang, China
| | - Dan Wei
- Institute of Plant Nutrition, Resources and Environment, Beijing Academy of Agriculture and Forestry Sciences, Beijing, China
- *Correspondence: Dan Wei,
| | - Junnan Ding
- Heilongjiang Province Key Laboratory of Cold Region Wetland Ecology and Environment Research, Harbin University, Harbin, Heilongjiang, China
| | - Nan Xu
- Heilongjiang Province Key Laboratory of Cold Region Wetland Ecology and Environment Research, Harbin University, Harbin, Heilongjiang, China
| | - Liang Jin
- Institute of Plant Nutrition, Resources and Environment, Beijing Academy of Agriculture and Forestry Sciences, Beijing, China
| | - Lei Wang
- Institute of Plant Nutrition, Resources and Environment, Beijing Academy of Agriculture and Forestry Sciences, Beijing, China
- Lei Wang,
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Fang J, Dong J, Li C, Chen H, Wang L, Lyu T, He H, Liu J. Response of microbial community composition and function to emergent plant rhizosphere of a constructed wetland in northern China. APPLIED SOIL ECOLOGY 2021; 168:104141. [DOI: 10.1016/j.apsoil.2021.104141] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2024]
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Ma L, Yang L, Liu W, Zhang Y, Zhou Q, Wu Z, He F. Effects of root exudates on rhizosphere bacteria and nutrient removal in pond-ditch circulation systems (PDCSs) for rural wastewater treatment. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 785:147282. [PMID: 33933761 DOI: 10.1016/j.scitotenv.2021.147282] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/09/2021] [Revised: 04/16/2021] [Accepted: 04/16/2021] [Indexed: 06/12/2023]
Abstract
Pond-ditch circulation system (PDCS) is a promising remediation strategy for rural wastewater treatment. Aquatic plants play nonnegligible roles in the nutrient removal of the PDCS. However, mechanisms of root exudates regulating nutrient removal in PDCSs remained unclear. In our study, the PDCS achieved higher total nitrogen (TN) and phosphorus (TP) removal rates (72.7-97.4%) compared to the static system. Protein contents in root exudates of the PDCS ranged from 0.041 to 1.332 mg L-1, showing negative associations with Simpson index. Lactic acid and tartaric acid in the PDCS varied from 0.045 to 0.380 mg L-1 and 0.024 to 5.446 mg L-1, which were tightly linked with TN, TP, and TP removal rates and most sediment properties, especially sediment total nitrogen (STN) and total organic carbon (TOC), and sediment inorganic phosphorus (SIP). Moreover, the top 3 relative dominant genus were Bacillus (0.11%-17.90%), Geobacter (0.35%-12.04%), and Clostridium sensu stricto 1 (0.14%-12.05%), which might be the predominant groups in nutrient removal of PDCSs. RDA results indicated that lactic acid, protein, and amino acids were positively correlated with Geobacter; while Bacillus was significantly affected by water content. Path analysis further demonstrated that the indirect effect of secretion from plant roots on nutrient removal rates was mainly through modulating bacteria diversity and relative abundance. Taken together, root exudates, especially protein, amino acids, and lactic acid, altered rhizosphere microbial relative abundance and diversity, where the impacts were bacterial species-dependent.
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Affiliation(s)
- Lin Ma
- CAS Key Laboratory of Aquatic Botany and Watershed Ecology, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, China; State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China; Hubei Key Laboratory of Wetland Evolution & Ecological Restoration, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, China
| | - Lingli Yang
- 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
| | - Wei Liu
- 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
| | - Yi Zhang
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
| | - Qiaohong Zhou
- 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
| | - Feng He
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China.
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Zhu Y, Cui L, Li J, Wang R, Vymazal J, Li W, Lei Y, Zhang M, Hao T, Wei J. Long-term performance of nutrient removal in an integrated constructed wetland. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 779:146268. [PMID: 33744583 DOI: 10.1016/j.scitotenv.2021.146268] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/13/2020] [Revised: 02/28/2021] [Accepted: 02/28/2021] [Indexed: 06/12/2023]
Abstract
Constructed wetlands (CWs) have been regarded as efficient technologies for both wastewater treatment and reuse of water resources. Most studies on CW treatment efficiency are limited to a short-term perspective, and there are still many unknowns about the long-term performance of CWs. Here we evaluated the performance of an integrated CW that has been in operation for more than ten years. The average removal rates of TN and TP were maintained at 53.6% and 67.3% over 10 years, respectively. The annual mass reductions in TN and TP reached 937.5 kg ha-1 yr-1 and 303.2 kg ha-1 yr-1, respectively. In addition, TN removal rate was significantly higher in summer and autumn than those in spring, yet there was no seasonal difference in TP removal. The bacterial richness and diversity in summer and autumn were higher than those in spring. TN and TOC not only determine the bacterial community structure, but also affect the removal efficiency of CW. Denitrification and dephosphorization microorganisms were enriched and accounted for a considerable proportion (21.14-52.85%) in the bacterial community. In addition, the relative abundance of Pseudomonas was significantly positively related with the rate of TN and TP removal.
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Affiliation(s)
- Yinuo Zhu
- Institute of Wetland Research, Chinese Academy of Forestry, Beijing 100091, China; Beijing Key Laboratory of Wetland Ecological Function and Restoration, Beijing 100091, China; Beijing Hanshiqiao National Wetland Ecosystem Research Station, Beijing 101399, China
| | - Lijuan Cui
- Institute of Wetland Research, Chinese Academy of Forestry, Beijing 100091, China; Beijing Key Laboratory of Wetland Ecological Function and Restoration, Beijing 100091, China; Beijing Hanshiqiao National Wetland Ecosystem Research Station, Beijing 101399, China.
| | - Jing Li
- Institute of Wetland Research, Chinese Academy of Forestry, Beijing 100091, China; Beijing Key Laboratory of Wetland Ecological Function and Restoration, Beijing 100091, China; Beijing Hanshiqiao National Wetland Ecosystem Research Station, Beijing 101399, China
| | - Rumiao Wang
- Institute of Wetland Research, Chinese Academy of Forestry, Beijing 100091, China; Beijing Key Laboratory of Wetland Ecological Function and Restoration, Beijing 100091, China; Beijing Hanshiqiao National Wetland Ecosystem Research Station, Beijing 101399, China
| | - Jan Vymazal
- Czech University of Life Sciences Prague, Faculty of Environmental Sciences, Kamýcká 129, 165 21 Praha 6, Czech Republic
| | - Wei Li
- Institute of Wetland Research, Chinese Academy of Forestry, Beijing 100091, China; Beijing Key Laboratory of Wetland Ecological Function and Restoration, Beijing 100091, China; Beijing Hanshiqiao National Wetland Ecosystem Research Station, Beijing 101399, China
| | - Yinru Lei
- Institute of Wetland Research, Chinese Academy of Forestry, Beijing 100091, China; Beijing Key Laboratory of Wetland Ecological Function and Restoration, Beijing 100091, China; Beijing Hanshiqiao National Wetland Ecosystem Research Station, Beijing 101399, China
| | - Manyin Zhang
- Institute of Wetland Research, Chinese Academy of Forestry, Beijing 100091, China; Beijing Key Laboratory of Wetland Ecological Function and Restoration, Beijing 100091, China; Beijing Hanshiqiao National Wetland Ecosystem Research Station, Beijing 101399, China
| | - Ting Hao
- Institute of Wetland Research, Chinese Academy of Forestry, Beijing 100091, China; Beijing Key Laboratory of Wetland Ecological Function and Restoration, Beijing 100091, China; Beijing Hanshiqiao National Wetland Ecosystem Research Station, Beijing 101399, China
| | - Jiaming Wei
- Beijing Construction Engineering Group Environmental Remediation Co. Ltd, National Engineering Laboratory for Site Remediation Technologies, Beijing 100015, China
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Nguyen XC, Ly QV, Peng W, Nguyen VH, Nguyen DD, Tran QB, Huyen Nguyen TT, Sonne C, Lam SS, Ngo HH, Goethals P, Le QV. Vertical flow constructed wetlands using expanded clay and biochar for wastewater remediation: A comparative study and prediction of effluents using machine learning. JOURNAL OF HAZARDOUS MATERIALS 2021; 413:125426. [PMID: 33621772 DOI: 10.1016/j.jhazmat.2021.125426] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2020] [Revised: 01/24/2021] [Accepted: 02/11/2021] [Indexed: 06/12/2023]
Abstract
This study evaluated and compared the performance of two vertical flow constructed wetlands (VF) using expanded clay (VF1) and biochar (VF2), of which both are low-cost, eco-friendly, and exhibit potentially high adsorption as compared to conventional filter layers. Both VFs achieved relatively high removal for organic matters (i.e. Biological oxygen demand during 5 days, BOD5) and nitrogen, accounting for 9.5 - 10.5 g.BOD5.m-2.d-1 and 3.5 - 3.6 g.NH4-N.m-2.d-1, respectively. The different filter materials did not exert any significant discrepancy to effluent quality in terms of suspended solids, organic matters and NO3-N (P > 0.05), but they did influence NH4-N effluent as evidenced by the removal rate of that by VF1 and VF2 being of 82.4 ± 5.7 and 84.6 ± 6.4%, respectively (P < 0.05). The results obtained from the designed systems were further subject to machine learning to clarify the effecting factors and predict the effluents. The optimal algorithms were random forest, generalized linear model, and support vector machine. The values of the coefficient of determination (R2) and the root mean square error (RMSE) of whole fitting data achieved 74.0% and 5.0 mg.L-1, 80.0% and 0.3 mg.L-1, 90.1% and 2.9 mg.L-1, and 48.5% and 0.5 mg.L-1 for BOD5_VF1, NH4-N_VF1, BOD5_VF2, and NH4-N_VF2, respectively.
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Affiliation(s)
- Xuan Cuong Nguyen
- Laboratory of Energy and Environmental Science, Institute of Research and Development, Duy Tan University, Da Nang 550000, Vietnam; Faculty of Environmental and Chemical Engineering, Duy Tan University, Da Nang 550000, Vietnam
| | - Quang Viet Ly
- School of Environmental Science and Engineering, Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Sun Yat-sen University, Guangzhou 510275, China
| | - Wanxi Peng
- Henan Province Engineering Research Center for Biomass Value-added Products, School of Forestry, Henan Agricultural University, Zhengzhou 450002, China
| | - Van-Huy Nguyen
- Department for Management of Science and Technology Development, Ton Duc Thang University, Ho Chi Minh City, Vietnam; Faculty of Applied Sciences, Ton Duc Thang University, Ho Chi Minh City, Vietnam.
| | - Dinh Duc Nguyen
- Faculty of Environmental and Food Engineering, Nguyen Tat Thanh University, 300A Nguyen Tat Thanh, District 4, Ho Chi Minh City 755414, Vietnam; Department of Environmental Energy Engineering, Kyonggi University, Suwon 16227, Republic of Korea
| | - Quoc Ba Tran
- Laboratory of Energy and Environmental Science, Institute of Research and Development, Duy Tan University, Da Nang 550000, Vietnam; Faculty of Environmental and Chemical Engineering, Duy Tan University, Da Nang 550000, Vietnam
| | - Thi Thanh Huyen Nguyen
- Laboratory of Energy and Environmental Science, Institute of Research and Development, Duy Tan University, Da Nang 550000, Vietnam; Faculty of Environmental and Chemical Engineering, Duy Tan University, Da Nang 550000, Vietnam
| | - Christian Sonne
- Aarhus University, Department of Bioscience, Arctic Research Centre (ARC), Frederiksborgvej 399, PO Box 358, DK-4000 Roskilde, Denmark
| | - Su Shiung Lam
- Higher Institution Centre of Excellence (HICoE), Institute of Tropical Aquaculture and Fisheries (AKUATROP), Universiti Malaysia Terengganu, 21030 Kuala Nerus, Terengganu, Malaysia
| | - Huu Hao Ngo
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Sydney, NWS 2007, Australia
| | - Peter Goethals
- Laboratory of Environmental Toxicology and Aquatic Ecology, Ghent University, Jozef Plateaustraat 22, B-9000 Ghent, Belgium
| | - Quyet Van Le
- Laboratory of Energy and Environmental Science, Institute of Research and Development, Duy Tan University, Da Nang 550000, Vietnam.
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Spatial-Temporal Changes in Removal of Fecal Indicators and Diversity of Bacterial Communities in a Constructed Wetland with Ornamental Plants. APPLIED SCIENCES-BASEL 2021. [DOI: 10.3390/app11093875] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
The present study was undertaken in a constructed wetland (CW), setup in a tourism house, for domestic wastewater treatment. The influence of season variations on the abundance of fecal indicator organisms (total coliforms and Escherichia coli) in the wastewater and in the substrate and the roots of plants inhabiting the inlet and outlet zones of the CW was evaluated along three consecutive years. The structure and diversity of bacterial communities associated to the CW’s substrate of inlet and outlet zones was also analyzed overtime. Wastewater was characterized for physicochemical and microbiological parameters and the bacterial communities colonizing the substrate surface, were analyzed by Denaturing Gradient Gel Electrophoresis (DGGE). The CW was effective in removing COD, BOD5, TSS, PO43−, NH4+, NO3−, and NO2−. It was also effective in removing fecal indicators, with a generalized decrease of total coliforms and E. coli in the substrate and in the wastewater from inlet to outlet of up to 2–3 log. The structure and composition of bacterial communities associated with the substrate was mainly influenced by the year rather than by the season or the CW zone.
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Alkylphenols and Chlorophenols Remediation in Vertical Flow Constructed Wetlands: Removal Efficiency and Microbial Community Response. WATER 2021. [DOI: 10.3390/w13050715] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
This study aims to investigate the effect of two different groups of phenolic compounds (the alkylphenols nonylphenol (NP) and octylphenol (OP), and the chlorophenol pentachlorophenol (PCP)) on constructed wetlands (CWs) performance, including on organic matter, nutrients and contaminants removal efficiency, and on microbial community structure in the plant bed substrate. CWs were assembled at lab scale simulating a vertical flow configuration and irrigated along eight weeks with Ribeira de Joane (an urban stream) water not doped (control) or doped with a mixture of NP and OP or with PCP (at a 100 μg·L−1 concentration each). The presence of the phenolic contaminants did not interfere in the removal of organic matter or nutrients in CWs in the long term. Removals of NP and OP were >99%, whereas PCP removals varied between 87% and 98%, mainly due to biodegradation. Microbial richness, diversity and dominance in CWs substrate were generally not affected by phenolic compounds, with only PCP decreasing diversity. Microbial community structure, however, showed that there was an adaptation of the microbial community to the presence of each contaminant, with several specialist genera being enriched following exposure. The three more abundant specialist genera were Methylotenera and Methylophilus (methylophilaceae family) and Hyphomicrobium (hyphomicrobiaceae family) when the systems were exposed to a mixture of NP and OP. When exposed to PCP, the three more abundant genera were Denitromonas (Rhodocyclaceae family), Xenococcus_PCC_7305 (Xenococcaceae family) and Rhodocyclaceae_uncultured (Rhodocyclaceae family). To increase CWs efficiency in the elimination of phenolic compounds, namely PCP which was not totally removed, strategies to stimulate (namely biostimulation) or increase (namely bioaugmentation) the presence of these bacteria should be explore. This study clearly shows the potential of vertical flow CWs for the removal of phenolic compounds, a still little explored subject, contributing to promote the use of CWs as nature-based solutions to remediate water contaminated with different families of persistent and/or emergent contaminants.
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Sui X, Zhang R, Frey B, Yang L, Liu Y, Ni H, Li M. Soil physicochemical properties drive the variation in soil microbial communities along a forest successional series in a degraded wetland in northeastern China. Ecol Evol 2021; 11:2194-2208. [PMID: 33717448 PMCID: PMC7920768 DOI: 10.1002/ece3.7184] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2020] [Revised: 08/19/2020] [Accepted: 12/22/2020] [Indexed: 12/29/2022] Open
Abstract
The Sanjiang Plain is the biggest freshwater wetland locating in northeastern China. Due to climate change and human activities, that wetland has degraded to a successional gradient from the original flooded wetland to dry shrub vegetation and a forest area with lower ground water level, which may result in changes in soil microbiologic structure and functions. The present study investigated the microbial diversity and community structure in relation to soil properties along that successional gradient. The soil physico-chemical properties changed significantly with degradation stage. The Shannon diversity index of both soil bacteria (5.90-6.42) and fungi (1.7-4.19) varied significantly with successional stage (both p < .05). The community structures of soil bacteria and fungi in the early successional stages (i.e., the wetland) were significantly determined by water content, total nitrogen, and available nitrogen concentrations in soils, while those in the later successional stages (i.e., forests) were significantly structured by soil organic carbon, soil pH, and available phosphorus concentrations. These results suggest that the soil microbial structure is mainly determined by soil properties rather than by plant community such as plant species composition along successional stages.
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Affiliation(s)
- Xin Sui
- Heilongjiang Provincial Key Laboratory of Ecological Restoration and Resource Utilization for Cold RegionSchool of Life SciencesHeilongjiang UniversityHarbinChina
- Institution of Nature and EcologyHeilongjiang Academy of SciencesHarbinChina
| | - Rongtao Zhang
- Institution of Nature and EcologyHeilongjiang Academy of SciencesHarbinChina
| | - Beat Frey
- Swiss Federal Research Institute WSLBirmensdorfSwitzerland
| | - Libin Yang
- Institution of Nature and EcologyHeilongjiang Academy of SciencesHarbinChina
| | - Yingnan Liu
- Institution of Nature and EcologyHeilongjiang Academy of SciencesHarbinChina
| | - Hongwei Ni
- Heilongjiang Academy of ForestryHarbinChina
| | - Mai‐He Li
- Swiss Federal Research Institute WSLBirmensdorfSwitzerland
- Key Laboratory of Geographical Processes and Ecological Security in Changbai MountainsMinistry of EducationSchool of Geographical SciencesNortheast Normal UniversityChangchunChina
- CAS Key Laboratory of Forest Ecology and ManagementInstitute of Applied EcologyErguna Forest‐Steppe Ecotone Research StationChinese Academy of SciencesShenyangChina
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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: 33] [Impact Index Per Article: 6.6] [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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Role of Microorganisms in the Remediation of Wastewater in Floating Treatment Wetlands: A Review. SUSTAINABILITY 2020. [DOI: 10.3390/su12145559] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
This article provides useful information for understanding the specific role of microbes in the pollutant removal process in floating treatment wetlands (FTWs). The current literature is collected and organized to provide an insight into the specific role of microbes toward plants and pollutants. Several aspects are discussed, such as important components of FTWs, common bacterial species, rhizospheric and endophytes bacteria, and their specific role in the pollutant removal process. The roots of plants release oxygen and exudates, which act as a substrate for microbial growth. The bacteria attach themselves to the roots and form biofilms to get nutrients from the plants. Along the plants, the microbial community also influences the performance of FTWs. The bacterial community contributes to the removal of nitrogen, phosphorus, toxic metals, hydrocarbon, and organic compounds. Plant–microbe interaction breaks down complex compounds into simple nutrients, mobilizes metal ions, and increases the uptake of pollutants by plants. The inoculation of the roots of plants with acclimatized microbes may improve the phytoremediation potential of FTWs. The bacteria also encourage plant growth and the bioavailability of toxic pollutants and can alleviate metal toxicity.
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Oliveira V, Martins P, Marques B, Cleary DFR, Lillebø AI, Calado R. Aquaponics using a fish farm effluent shifts bacterial communities profile in halophytes rhizosphere and endosphere. Sci Rep 2020; 10:10023. [PMID: 32572050 PMCID: PMC7308282 DOI: 10.1038/s41598-020-66093-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2018] [Accepted: 05/11/2020] [Indexed: 11/28/2022] Open
Abstract
The intensification of marine aquaculture raises multiple sustainability issues, namely the handling of nutrient-rich effluents that can adversely impact ecosystems. As integrated multi-trophic aquaculture (IMTA) gains momentum, the use of halophyte plants to phytoremediate aquaculture effluents has received growing attention, particularly in aquaponics. It is, therefore, important to obtain a more in-depth knowledge of the microbial communities present in the root systems of these plants, both in their natural environment (sediment) and in aquaponics, in order to understand their nutrient removal potential. The present study used denaturing gradient gel electrophoresis (DGGE) and barcoded pyrosequencing to assess the bacterial community present in the endosphere and rhizosphere of three halophyte plants: Halimione portulacoides, Salicornia ramosissima and Sarcocornia perennis. Species-specific effects were recorded in the profile and diversity of the bacterial communities present in halophyte roots, with significant differences also recorded for the same halophyte species grown in contrasting environments (sediment vs. aquaponics). In aquaponics the most abundant groups belonged to the orders Rhodocyclales, Campylobacterales, Rhodobacterales and Desulfobacterales, while in the natural environment (sediment) the most abundant groups belonged to the orders Rhizobiales, Sphingomonadales and Alteromonadales. An overall enrichment in bacterial taxa involved in nutrient cycling was recorded in the roots of halophytes grown in aquaponics (such as Denitromonas, Mesorhizobium, Colwellia, Dokdonella and Arcobacter), thereby highlighting their potential to reduce the nutrient loads from aquaculture effluents.
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Affiliation(s)
- Vanessa Oliveira
- CESAM - Centre for Environmental and Marine Studies, Departament of Biology, University of Aveiro, Campus Universitário de Santiago, 3810-193, Aveiro, Portugal
| | - Patrícia Martins
- ECOMARE, CESAM - Centre for Environmental and Marine Studies, Departament of Biology, University of Aveiro, Campus Universitário de Santiago, 3810-193, Aveiro, Portugal
| | - Bruna Marques
- ECOMARE, CESAM - Centre for Environmental and Marine Studies, Departament of Biology, University of Aveiro, Campus Universitário de Santiago, 3810-193, Aveiro, Portugal
| | - Daniel F R Cleary
- CESAM - Centre for Environmental and Marine Studies, Departament of Biology, University of Aveiro, Campus Universitário de Santiago, 3810-193, Aveiro, Portugal
| | - Ana I Lillebø
- ECOMARE, CESAM - Centre for Environmental and Marine Studies, Departament of Biology, University of Aveiro, Campus Universitário de Santiago, 3810-193, Aveiro, Portugal.
| | - Ricardo Calado
- ECOMARE, CESAM - Centre for Environmental and Marine Studies, Departament of Biology, University of Aveiro, Campus Universitário de Santiago, 3810-193, Aveiro, Portugal.
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Ramírez-Vargas CA, Arias CA, Zhang L, Paredes D, Brix H. Community level physiological profiling of microbial electrochemical-based constructed wetlands. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 721:137761. [PMID: 32163740 DOI: 10.1016/j.scitotenv.2020.137761] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/25/2019] [Revised: 03/02/2020] [Accepted: 03/04/2020] [Indexed: 06/10/2023]
Abstract
The performance of constructed wetlands (CW) can be enhanced through the use of microbial electrochemical technologies like METland systems. Given its novelty, uncertainties exist regarding processes responsible for the pollutant removal and microbial activity within the systems. Genetic characterization of microbial communities of METlands is desirable, but it is a time and resource consuming. An alternative, is the functional analysis based on community-level physiological profile (CLPP), which allows to evaluate the diversity of microbial communities based on the carbon consumption patterns and derived indexes (average well color development - AWCD -, richness, and diversity). This study aimed to characterize the microbial community function of laboratory-scale METlands using the CLPP method. It encompassed the analysis of planted and non-planted set-ups of two carbon-based electroconductive materials (Coke-A and Coke-LSN) colonized with electroactive biofilms, and compared to Sand-filled columns. Variations in the microbial metabolic activity were found to depend on the characteristics of the material rather than to the presence of plants. Coke-A systems showed lower values of AWCD, richness, and diversity than Sand and Coke-LSN systems. This suggests that Coke-A systems provided more favorable conditions for the development of relatively homogeneous microbial biofilms. Additionally, typical parameters of water quality were measured and correlations between utilization of carbon sources and removal of pollutants were established. The results provide useful insight into the spatial dynamics of the microbial activity of METland systems.
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Affiliation(s)
- Carlos A Ramírez-Vargas
- Department of Bioscience, Aarhus University, 8000 Aarhus C, Denmark; WATEC, Aarhus University, 8000 Aarhus C, Denmark.
| | - Carlos A Arias
- Department of Bioscience, Aarhus University, 8000 Aarhus C, Denmark; WATEC, Aarhus University, 8000 Aarhus C, Denmark
| | - Liang Zhang
- Department of Bioscience, Aarhus University, 8000 Aarhus C, Denmark; WATEC, Aarhus University, 8000 Aarhus C, Denmark
| | - Diego Paredes
- Grupo de Investigación en Agua y Saneamiento (GIAS), Universidad Tecnológica de Pereira, 660003 Pereira, Colombia
| | - Hans Brix
- Department of Bioscience, Aarhus University, 8000 Aarhus C, Denmark; WATEC, Aarhus University, 8000 Aarhus C, Denmark
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Tian T, Yang Q, Wei G, Cheung SG, Shin PKS, Wong YS, Li Z, Chen Z, Tam NFY. Changes of substrate microbial biomass and community composition in a constructed mangrove wetland for municipal wastewater treatment during 10-years operation. MARINE POLLUTION BULLETIN 2020; 155:111095. [PMID: 32469756 DOI: 10.1016/j.marpolbul.2020.111095] [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: 09/29/2019] [Revised: 03/16/2020] [Accepted: 03/18/2020] [Indexed: 06/11/2023]
Abstract
Constructed wetlands (CWs) have been used for wastewater treatment for decades, but research on microorganisms involved, especially long-term changes, is still limited. In this study, we evaluated changes in the substrate microbial community in a pilot-scale horizontal subsurface-flow constructed mangrove wetland during 10-years operation. In the 3rd year of operation, microbial biomass carbon and phospholipid fatty acids (PLFAs) reached peak values in two vegetated belts planted with Aegiceras corniculatum (Ac) and Kandelia obovata (Ko), respectively, then stabilized or declined in the 9th and 10th years of operation. PLFA profiles reflecting microbial community compositions varied significantly in the Ac belt during the operation period. Principal component (PCA) and redundancy analyses (RDA) revealed that microbial community compositions were significantly correlated with organic matter content, especially in the 9th and 10th years of operation, implying that the substrate microbial community in constructed mangrove wetland is sensitive to substrate characteristics and can be used as an indicator for long-term performance of CWs.
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Affiliation(s)
- Tingting Tian
- Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Guangdong Institute of Eco-environmental Science & Technology, Guangdong Academy of Sciences, Guangzhou, China; Futian-CityU Mangrove Research and Development Centre, City University of Hong Kong, Shenzhen, China; National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangzhou, China.
| | - Qiong Yang
- Guangdong Neilingding Futian National Nature Reserve, Shenzhen, China
| | - Gaoling Wei
- Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Guangdong Institute of Eco-environmental Science & Technology, Guangdong Academy of Sciences, Guangzhou, China; National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangzhou, China
| | - Siu Gin Cheung
- Futian-CityU Mangrove Research and Development Centre, City University of Hong Kong, Shenzhen, China; Department of Chemistry, City University of Hong Kong, Hong Kong, China
| | - Paul K S Shin
- Futian-CityU Mangrove Research and Development Centre, City University of Hong Kong, Shenzhen, China; Department of Chemistry, City University of Hong Kong, Hong Kong, China
| | - Yuk Shan Wong
- School of Science and Technology, Open University of Hong Kong, Hong Kong, China
| | - Zhang Li
- Futian-CityU Mangrove Research and Development Centre, City University of Hong Kong, Shenzhen, China; College of Life Science, South China Normal University, Guangzhou, China
| | - Zhanghe Chen
- College of Life Science, South China Normal University, Guangzhou, China
| | - Nora Fung Yee Tam
- Futian-CityU Mangrove Research and Development Centre, City University of Hong Kong, Shenzhen, China; Department of Chemistry, City University of Hong Kong, Hong Kong, China.
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Xing W, Han Y, Guo Z, Zhou Y. Quantitative study on redistribution of nitrogen and phosphorus by wetland plants under different water quality conditions. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2020; 261:114086. [PMID: 32062459 DOI: 10.1016/j.envpol.2020.114086] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2019] [Revised: 01/17/2020] [Accepted: 01/27/2020] [Indexed: 06/10/2023]
Abstract
The application of wetland plants to purify surface rivers has gradually become an important means to control water pollution. However, there are many species of wetland plants which differ greatly in living conditions, water purification effects and pollutant migration paths. Therefore, it is necessary to select suitable wetland plants and quantitatively analyze the effects of different wetland plants on pollutant transport paths for the protection of water quality. In this research, the Typha orientalis C. Presl (T), Lemna minor L.(L) and Ceratophyllum demersum L.(C) were selected as typical wetland plants to conduct single-factor and multi-factor experiments under different water quality conditions. The results showed that wetland plants had significantly decreased nitrogen (N) and phosphorus (P) concentration in two sewage bodies. The NH4+-N and NO3--N removal efficiencies ranged from 71 to 96% and from 46% to 76%, and the PO43--P removal efficiencies ranged from 79% to 94% . The concentration of nutrient in the sewage decreased rapidly in the early stage and then tended to reach a stable state. The total nitrogen (TN) removal efficiencies under two kinds of sewage ranked as follows: T+L+C>T>C>L. Under high concentration sewage, the TN removal efficiencies by wetland plants mostly attributed to the change in the microbial status of the water body, which ranged from 82% to 95%. Under low concentration sewage, the combination of wetland plants could optimize the purification effect of plant consumption and microbial decomposition, and the TN removal efficiencies ranged from 75% to 95%. The total phosphorus (TP) removal efficiencies of T and T+L+C were better in two concentration sewages. The research demonstrated that P in sewage was mainly accumulated in soil matrix and it was important to select the emergent plants with well-develoed roots and vigorous growth to purify sewage.
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Affiliation(s)
- Weimin Xing
- School of Soil and Water Conservation, Key Laboratory of State Forestry Administration on Soil and Water Conservation, Beijing Forestry University, Beijing, 100083, People's Republic of China
| | - Yuguo Han
- School of Soil and Water Conservation, Key Laboratory of State Forestry Administration on Soil and Water Conservation, Beijing Forestry University, Beijing, 100083, People's Republic of China.
| | - Zifan Guo
- School of Soil and Water Conservation, Key Laboratory of State Forestry Administration on Soil and Water Conservation, Beijing Forestry University, Beijing, 100083, People's Republic of China
| | - Yue Zhou
- School of Soil and Water Conservation, Key Laboratory of State Forestry Administration on Soil and Water Conservation, Beijing Forestry University, Beijing, 100083, People's Republic of China
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16
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Unveiling the Potential of Novel Macrophytes for the Treatment of Tannery Effluent in Vertical Flow Pilot Constructed Wetlands. WATER 2020. [DOI: 10.3390/w12020549] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
The phytoremediation potential of macrophytic species has made them an inevitable component of constructed wetlands (CWs) for the treatment of industrial effluents. The macrophytes must have tolerance for the harsh conditions imposed by effluents for an effective establishment of the CW system. In this context, the basic purpose of this work was to investigate the efficacy of five indigenous emergent macrophytes (Brachiaria mutica, Canna indica, Cyperus laevigatus, Leptochloa fusca, and Typha domingensis) for the remediation of tannery effluent in vertical subsurface flow CWs. The ability of each macrophytic species to tolerate pollution load and to remove pollutants from the effluent was assessed. The effect of tannery effluent on the survival and growth of macrophytes was also studied. The treated tannery effluent samples were analyzed for electrical conductivity (EC), pH, biochemical oxygen demand (BOD5), chemical oxygen demand (COD), total dissolved solids (TDS), total suspended solids (TSS), chlorides (Cl−), sulphates (SO42−), oil and grease, and Cr levels. All of the studied macrophytes significantly decreased the pollution load of tannery effluent, and the higher nutrient content of effluent stimulated their growth without any signs of negative health effects. Leptochloa fusca and T. domingensis performed better in removing pollutants and showed higher growth rates and biomass than other tested macrophytes and can be considered preferred species for use in CWs treating tannery effluent. Brachiaria mutica showed morphologically better results than C. indica and C. laevigatus.
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Ramírez S, Torrealba G, Lameda-Cuicas E, Molina-Quintero L, Stefanakis AI, Pire-Sierra MC. Investigation of pilot-scale constructed wetlands treating simulated pre-treated tannery wastewater under tropical climate. CHEMOSPHERE 2019; 234:496-504. [PMID: 31229710 DOI: 10.1016/j.chemosphere.2019.06.081] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2019] [Revised: 05/22/2019] [Accepted: 06/09/2019] [Indexed: 06/09/2023]
Abstract
Tannery wastewater is characterized by high and variable concentrations of diverse pollutants, which makes it difficult and costly to treat. In the search for sustainable treatment options for tannery effluents, two pilot-scale horizontal subsurface flow (HSF) constructed wetlands (CW) were built and operated for the treatment of synthetic water of quality similar to that of pre-treated tannery effluents. Five different loading phases were examined with gradual increase of inflow COD, NH4+-N and Cr loads until reaching and exceeding the typical composition of a tannery effluent. High COD and NH4+-N removals were observed (82 and 96%, respectively), and almost complete Cr removal in the outflow, which met the Venezuela national standards for environmental discharge. Plant uptake was measured, but microbial processes appear to be the main ammonium transformation/removal mechanism. Nitrogen, chlorophyll and Cr in the plant aerial parts and roots indicated the capacity of Phragmites sp. to grow and survive even under high loads. The measured heterotrophic bacteria in the substrate and rhizomes indicated the biofilm development and the oxidation of organic matter and nitrogen. Water losses via evapotraspiration were also measured and reached 14%. Overall, the tested CW design proved to be a sustainable and feasible alternative for the treatment of tannery wastewater in tropical climates.
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Affiliation(s)
- Susana Ramírez
- Environmental Research Laboratory, Department of Ecology and Quality Control, Agroindustrial Engineering Program, Centroccidental University "Lisandro Alvarado", Barquisimeto, Venezuela
| | - Graciela Torrealba
- Microbiology Laboratory, Department of Ecology and Quality Control, Agroindustrial Engineering Program, Centroccidental University "Lisandro Alvarado", Barquisimeto, Venezuela
| | - Eudimar Lameda-Cuicas
- Environmental Research Laboratory, Department of Ecology and Quality Control, Agroindustrial Engineering Program, Centroccidental University "Lisandro Alvarado", Barquisimeto, Venezuela; Microbiology Laboratory, Department of Ecology and Quality Control, Agroindustrial Engineering Program, Centroccidental University "Lisandro Alvarado", Barquisimeto, Venezuela
| | - Luisa Molina-Quintero
- Microbiology Laboratory, Department of Ecology and Quality Control, Agroindustrial Engineering Program, Centroccidental University "Lisandro Alvarado", Barquisimeto, Venezuela
| | | | - Maria Carolina Pire-Sierra
- Environmental Research Laboratory, Department of Ecology and Quality Control, Agroindustrial Engineering Program, Centroccidental University "Lisandro Alvarado", Barquisimeto, Venezuela
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18
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Wu Y, He T, Chen C, Fang X, Wei D, Yang J, Zhang R, Han R. Impacting Microbial Communities and Absorbing Pollutants by Canna Indica and Cyperus Alternifolius in a Full-Scale Constructed Wetland System. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2019; 16:E802. [PMID: 30841572 PMCID: PMC6427132 DOI: 10.3390/ijerph16050802] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/01/2019] [Revised: 02/26/2019] [Accepted: 03/01/2019] [Indexed: 12/01/2022]
Abstract
Wetland plants that cover the wetlands play an important role in reducing pollutants. The aim of this study was to investigate the effect of two plant species on microbial communities and nitrogen-removal genes and to evaluate the contributions of absorbing pollutants by Canna indica (CI) and Cyperus alternifolius (CA) to the removal performance in both a vertical subsurface flow constructed wetland and a horizontal subsurface flow constructed wetland, which were part of a full-scale hybrid constructed wetland system. The microbial assemblages were determined using 16S rRNA high-throughput sequencing. Results showed that the presence of CI and CA positively affected microbial abundance and community in general and which was positive for the total bacteria and ammonia nitrogen removal in the CWs. The higher abundance of Nitrospirae appeared in the non-rhizosphere sediment (NRS) than that in the rhizosphere sediment (RS). More denitrification genes were found in NRS than in RS. The copy numbers of narG, nirS and nosZ genes for CA were higher than those for CI. Wetland plant species can significantly (P < 0.05) affect the distribution of microbial communities in RS. Plant selection is important to promote the development of microbial communities with a more active and diverse catabolic capability and the contribution of plant absorption to the overall removal rate of wetland system can be neglected.
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Affiliation(s)
- Yinghai Wu
- College of Marine and Civil Engineering, Dalian Ocean University, Dalian 116023, China.
- Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Sun Yat-sen University, Guangzhou 510275, China.
| | - Tao He
- South China Institute of Environmental Science, Ministry of Environment Protection, Guangzhou 510655, China.
| | - Chen Chen
- South China Institute of Environmental Science, Ministry of Environment Protection, Guangzhou 510655, China.
| | - Xiaohang Fang
- South China Institute of Environmental Science, Ministry of Environment Protection, Guangzhou 510655, China.
| | - Dongyang Wei
- South China Institute of Environmental Science, Ministry of Environment Protection, Guangzhou 510655, China.
| | - Jing Yang
- South China Institute of Environmental Science, Ministry of Environment Protection, Guangzhou 510655, China.
| | - Renduo Zhang
- Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Sun Yat-sen University, Guangzhou 510275, China.
| | - Rui Han
- College of Marine Technology and Environment, Dalian Ocean University, Dalian 116023, China.
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19
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Zhang Y, Lyu T, Zhang L, Button M, Arias CA, Weber KP, Shi J, Chen Z, Brix H, Carvalho PN. Microbial community metabolic profiles in saturated constructed wetlands treating iohexol and ibuprofen. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 651:1926-1934. [PMID: 30317179 DOI: 10.1016/j.scitotenv.2018.10.103] [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: 04/23/2018] [Revised: 10/08/2018] [Accepted: 10/08/2018] [Indexed: 06/08/2023]
Abstract
The aim of the present study was to elucidate the microbial community metabolic profiles in saturated constructed wetland (CW) mesocosms planted with five different wetland plant species fed with water individually spiked with 100 μg L-1 ibuprofen or iohexol. Community-level physiological profiling (CLPP) using Biolog Ecoplates was performed and coupled with the assessment of water quality parameters (water temperature, pH, DO and TOC, TN, NH4-N, PO4-P removal efficiency). The microbial community metabolic profiles (microbial activity, richness, and carbon source utilization), as well as the water quality parameters revealed similar trends among the control mesocosms and the mesocosms fed with water spiked with iohexol and ibuprofen. Significant differences were observed between the planted and unplanted mesocosms and between seasons (summer and winter) within each of the feeding lines (control, iohexol or ibuprofen). The microbial community metabolic profiles in the saturated CW were shaped by plant presence and plant species, while no negative impact of iohexol and ibuprofen presence was noticed at the 100 μg L-1. In addition, the microbial activity and richness were generally higher in planted mesocosms than in the unplanted systems in the summer. For the first time, a positive correlation between iohexol removal and the microbial community metabolic profiles (activity, richness and amines and amides utilization in summer, and carbohydrates utilization in winter) in the saturated mesocosms was observed. Putrescine utilization in the summer and d-cellobiose, d,l-alpha-glycerol phosphate in winter were linked with the metabolic processing of iohexol, while glycogen in summer and l-phenylalanine, Glycyl-l-glutamic acid in winter were linked with ibuprofen removal efficiency in the saturated CW.
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Affiliation(s)
- Yang Zhang
- Department of Bioscience, Aarhus University, Aarhus 8000C, Denmark; School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, PR China; College of Life Science, South China Normal University, Guangzhou 510631, PR China
| | - Tao Lyu
- Department of Bioscience, Aarhus University, Aarhus 8000C, Denmark; School of Animal, Rural and Environmental Science, Nottingham Trent University, Nottinghamshire NG25 0QF, UK
| | - Liang Zhang
- Department of Bioscience, Aarhus University, Aarhus 8000C, Denmark
| | - Mark Button
- Department of Chemistry and Chemical Engineering, Royal Military College of Canada, Kingston, ON K7K 7B4, Canada; Fipke Laboratory for Trace Element Research, Earth, Environmental and Geographic Sciences, University of British Columbia Okanagan, Kelowna V1V 1V7, BC, Canada
| | - Carlos A Arias
- Department of Bioscience, Aarhus University, Aarhus 8000C, Denmark; WATEC - Centre for Water Technology, Aarhus University, Aarhus 8000C, Denmark
| | - Kela P Weber
- Department of Chemistry and Chemical Engineering, Royal Military College of Canada, Kingston, ON K7K 7B4, Canada
| | - Jianghong Shi
- School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, PR China
| | - Zhanghe Chen
- College of Life Science, South China Normal University, Guangzhou 510631, PR China
| | - Hans Brix
- Department of Bioscience, Aarhus University, Aarhus 8000C, Denmark; WATEC - Centre for Water Technology, Aarhus University, Aarhus 8000C, Denmark
| | - Pedro N Carvalho
- Department of Bioscience, Aarhus University, Aarhus 8000C, Denmark; WATEC - Centre for Water Technology, Aarhus University, Aarhus 8000C, Denmark; Department of Environmental Science, Aarhus University, Frederiksborgsvej 399, 4000 Roskilde, Denmark.
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20
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Singh T, Singh DK. Assessing the Bacterial Community Structure in the Rhizoplane of Wetland Plants. BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2018; 101:521-526. [PMID: 30182151 DOI: 10.1007/s00128-018-2426-1] [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: 05/09/2018] [Accepted: 08/21/2018] [Indexed: 06/08/2023]
Abstract
Plant-microorganism interaction in the rhizosphere is important for nutrient cycling, carbon sequestration in natural ecosystems, contaminant elimination and ecosystem functioning. Abundance of microbial communities and variation in species composition can be an imperative determinant of phytoremediation capability. In the present study we have assessed the bacterial community structure in the rhizoplane of wetland plants, Acorus calamus, Typha latifolia, and Phragmites karka using Terminal restriction fragment length polymorphism technique. The most dominant phylum, in the plants under study, was phylum Firmicutes, followed by Proteobacteria and Actinobacteria. Bacterial groups belonging to phylum Chloroflexi, Acidobacteria, Deferribacteres and Thermotogae also showed their presence in P. karka and T. latifolia but were absent in A. calamus. Diversity indices of bacterial community were assessed. The results of this study show the presence of bacterial phyla which play an important role in bioremediation of contaminants. Thus these plants can be used as potential candidates of phytoremediation.
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Affiliation(s)
- Tanvi Singh
- Department of Zoology, University of Delhi, Delhi, India.
| | - Dileep K Singh
- Department of Zoology, University of Delhi, Delhi, India
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21
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Pietrangelo L, Bucci A, Maiuro L, Bulgarelli D, Naclerio G. Unraveling the Composition of the Root-Associated Bacterial Microbiota of Phragmites australis and Typha latifolia. Front Microbiol 2018; 9:1650. [PMID: 30116224 PMCID: PMC6083059 DOI: 10.3389/fmicb.2018.01650] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2017] [Accepted: 07/02/2018] [Indexed: 01/08/2023] Open
Abstract
Phragmites australis and Typha latifolia are two macrophytes commonly present in natural and artificial wetlands. Roots of these plants engage in interactions with a broad range of microorganisms, collectively referred to as the microbiota. The microbiota contributes to the natural process of phytodepuration, whereby pollutants are removed from contaminated water bodies through plants. The outermost layer of the root corpus, the rhizoplane, is a hot-spot for these interactions where microorganisms establish specialized aggregates designated biofilm. Earlier studies suggest that biofilm-forming members of the microbiota play a crucial role in the process of phytodepuration. However, the composition and recruitment cue of the Phragmites, and Typha microbiota remain poorly understood. We therefore decided to investigate the composition and functional capacities of the bacterial microbiota thriving at the P. australis and T. latifolia root–soil interface. By using 16S rRNA gene Illumina MiSeq sequencing approach we demonstrated that, despite a different composition of the initial basin inoculum, the microbiota associated with the rhizosphere and rhizoplane of P. australis and T. latifolia tends to converge toward a common taxonomic composition dominated by members of the phyla Actinobacteria, Firmicutes, Proteobacteria, and Planctomycetes. This indicates the existence of a selecting process acting at the root–soil interface of these aquatic plants reminiscent of the one observed for land plants. The magnitude of this selection process is maximum at the level of the rhizoplane, where we identified different bacteria enriched in and discriminating between rhizoplane and rhizosphere fractions in a species-dependent and -independent way. This led us to hypothesize that the structural diversification of the rhizoplane community underpins specific metabolic capabilities of the microbiota. We tested this hypothesis by complementing the sequencing survey with a biochemical approach and scanning electron microscopy demonstrating that rhizoplane-enriched bacteria have a bias for biofilm-forming members. Together, our data will be critical to facilitate the rational exploitation of plant–microbiota interactions for phytodepuration.
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Affiliation(s)
- Laura Pietrangelo
- Department of Biosciences and Territory, University of Molise, Campobasso, Italy.,Plant Sciences, School of Life Sciences, University of Dundee, Dundee, United Kingdom
| | - Antonio Bucci
- Department of Biosciences and Territory, University of Molise, Campobasso, Italy
| | - Lucia Maiuro
- Department of Agricultural, Environmental and Food Sciences, University of Molise, Campobasso, Italy
| | - Davide Bulgarelli
- Plant Sciences, School of Life Sciences, University of Dundee, Dundee, United Kingdom
| | - Gino Naclerio
- Department of Biosciences and Territory, University of Molise, Campobasso, Italy
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22
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Guan M, Pan XC, Wang S, Wei XL, Zhang CB, Wang J, Liu WL, Liu SY, Chang J. Comparison of fungal communities among ten macrophyte rhizospheres. Fungal Biol 2018; 122:867-874. [PMID: 30115320 DOI: 10.1016/j.funbio.2018.05.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2017] [Revised: 04/16/2018] [Accepted: 05/03/2018] [Indexed: 11/17/2022]
Abstract
The fungal community composition, size and several physico-chemical properties were individually investigated in ten macrophyte rhizospheric substrates using nested PCR-denaturing gradient gel electrophoresis and soil chemical methods. Results indicated that both Dothideomycetes and Sordariomycetes were dominant fungi in macrophyte rhizospheric substrates, and denitrifying fungi (Fusarium graminearum) was found in nine of ten macrophyte rhizospheres. Fungal Shannon-Wiener diversity index (H) and richness (S) in Thalia dealbata, Typha latifolia, Iris hexagona and Hemerocallis aurantiaca rhizospheres were higher than those in other six rhizospheres. Fungal number and biomass were 1.91 × 103 CFUs g-1 dw and 1.53 μg ergosterol g-1 dw in Iris pseudacor rhizosphere, and were greater than in other nine rhizospheres. The correlation analysis showed that fungal number and biomass significantly and positively correlated to total soil phosphorus, while fungal H and S were significantly and negatively correlated to total organic carbon. The principal components analysis (PCA) showed that the fungal community significantly divided ten macrophyte rhizospheres into four groups, showing the significant difference of fungal communities among ten rhizospheric substrates. The current study revealed for the first time the importance of rhizospheric fungal community in distinguishing macrophyte rhizospheres, thus will undoubtedly widen our insight into fungal communities in aquatic rhizospheres.
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Affiliation(s)
- Ming Guan
- Institute of Constructed Wetland Technology, Taizhou University, Taizhou, 318000, China; College of Bioscience and Biotechnology, Shenyang Agricultural University, Shenyang, 110866, China
| | - Xiao-Cui Pan
- Institute of Constructed Wetland Technology, Taizhou University, Taizhou, 318000, China
| | - Shuo Wang
- College of Bioscience and Biotechnology, Shenyang Agricultural University, Shenyang, 110866, China
| | - Xiao-Lin Wei
- College of Bioscience and Biotechnology, Shenyang Agricultural University, Shenyang, 110866, China
| | - Chong-Bang Zhang
- Institute of Constructed Wetland Technology, Taizhou University, Taizhou, 318000, China.
| | - Jiang Wang
- Institute of Constructed Wetland Technology, Taizhou University, Taizhou, 318000, China
| | - Wen-Li Liu
- Institute of Constructed Wetland Technology, Taizhou University, Taizhou, 318000, China; School of Civil Engineering and Architecture, Taizhou University, Taizhou, 318000, China
| | - Shu-Yuan Liu
- School of Civil Engineering and Architecture, Taizhou University, Taizhou, 318000, China
| | - Jie Chang
- College of Life Sciences, Zhejiang University, Hangzhou, 310058, China
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23
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Tian T, Tam NFY, Zan Q, Cheung SG, Shin PKS, Wong YS, Zhang L, Chen Z. Performance and bacterial community structure of a 10-years old constructed mangrove wetland. MARINE POLLUTION BULLETIN 2017; 124:1096-1105. [PMID: 28711288 DOI: 10.1016/j.marpolbul.2017.07.005] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2016] [Revised: 06/30/2017] [Accepted: 07/03/2017] [Indexed: 06/07/2023]
Abstract
Constructed mangrove wetland has been used for wastewater treatment but its long-term performance has not been reported. One-year monitoring of a 10-years old horizontal subsurface-flow constructed mangrove wetland consisting of three belts, two with mangrove plants and one without, revealed that the system maintained high and stable removal percentages of organic matter and nutrients, and planted belts performed better than unplanted control. Substrates in belts planted with Aegiceras corniculatum or Kandelia obovata had higher abundance of ammonifiers, nitrifiers and denitrifiers but lower total heterotrophic bacteria than unplanted substrate. Denaturing gradient gel electrophoresis showed that microbial diversity in planted substrate was significantly lower than that in unplanted one. The bacteria in substrates, irrespective to belts, were phylogenetically related to Proteobacteria (most dominant), Acidobacteria, Firmicutes, Nitrospirae, Gemmatimonadetes, Chloroflexi and Cyanobacteria. The steady performance of this 10-year old constructed mangrove wetland was affected by the abundance and diversity of bacterial community in substrate.
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Affiliation(s)
- Tingting Tian
- Key Laboratory of Ecology and Environmental Science in Guangdong Higher Education, College of Life Science, South China Normal University, Guangzhou, China; Futian-CityU Mangrove Research and Development Centre, City University of Hong Kong, Shenzhen, China
| | - Nora F Y Tam
- Futian-CityU Mangrove Research and Development Centre, City University of Hong Kong, Shenzhen, China; Department of Biology and Chemistry, City University of Hong Kong, Hong Kong, China.
| | - Qijie Zan
- Guangdong Neilingding Futian National Nature Reserve, Shenzhen, China
| | - S G Cheung
- Futian-CityU Mangrove Research and Development Centre, City University of Hong Kong, Shenzhen, China; Department of Biology and Chemistry, City University of Hong Kong, Hong Kong, China
| | - Paul K S Shin
- Futian-CityU Mangrove Research and Development Centre, City University of Hong Kong, Shenzhen, China; Department of Biology and Chemistry, City University of Hong Kong, Hong Kong, China
| | - Y S Wong
- School of Science and Technology, Open University of Hong Kong, Hong Kong, China
| | - Li Zhang
- Key Laboratory of Ecology and Environmental Science in Guangdong Higher Education, College of Life Science, South China Normal University, Guangzhou, China; Futian-CityU Mangrove Research and Development Centre, City University of Hong Kong, Shenzhen, China
| | - Zhanghe Chen
- Key Laboratory of Ecology and Environmental Science in Guangdong Higher Education, College of Life Science, South China Normal University, Guangzhou, China.
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Huang X, Xiong W, Liu W, Guo X. Effect of reclaimed water effluent on bacterial community structure in the Typha angustifolia L. rhizosphere soil of urbanized riverside wetland, China. J Environ Sci (China) 2017; 55:58-68. [PMID: 28477834 DOI: 10.1016/j.jes.2016.06.022] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2016] [Revised: 05/16/2016] [Accepted: 06/02/2016] [Indexed: 06/07/2023]
Abstract
In order to evaluate the impact of reclaimed water on the ecology of bacterial communities in the Typha angustifolia L. rhizosphere soil, bacterial community structure was investigated using a combination of terminal restriction fragment length polymorphism and 16S rRNA gene clone library. The results revealed significant spatial variation of bacterial communities along the river from upstream and downstream. For example, a higher relative abundance of γ-Proteobacteria, Firmicutes, Chloroflexi and a lower proportion of β-Proteobacteria and ε-Proteobacteria was detected at the downstream site compared to the upstream site. Additionally, with an increase of the reclaimed water interference intensity, the rhizosphere bacterial community showed a decrease in taxon richness, evenness and diversity. The relative abundance of bacteria closely related to the resistant of heavy-metal was markedly increased, while the bacteria related for carbon/nitrogen/phosphorus/sulfur cycling wasn't strikingly changed. Besides that, the pathogenic bacteria markedly increased in the downstream rhizosphere soil since reclaimed water supplement, while the possible plant growth-promoting rhizobacteria obviously reduced in the downstream sediment. Together these data suggest cause and effect between reclaimed water input into the wetland, shift in bacterial communities through habitat change, and alteration of capacity for biogeochemical cycling of contaminants.
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Affiliation(s)
- Xingru Huang
- College of Resources Environment and Tourism, Capital Normal University, Beijing 100048, China; Beijing Municipal Key Laboratory of Resources Environment and GIS, Beijing 100048, China.
| | - Wei Xiong
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Wei Liu
- College of Resources Environment and Tourism, Capital Normal University, Beijing 100048, China; Beijing Municipal Key Laboratory of Resources Environment and GIS, Beijing 100048, China
| | - Xiaoyu Guo
- College of Resources Environment and Tourism, Capital Normal University, Beijing 100048, China; Beijing Municipal Key Laboratory of Resources Environment and GIS, Beijing 100048, China; Urban Environmental Processes and Digital Modeling Laboratory, Beijing 100048, China.
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25
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Sánchez O. Constructed Wetlands Revisited: Microbial Diversity in the -omics Era. MICROBIAL ECOLOGY 2017; 73:722-733. [PMID: 27832305 DOI: 10.1007/s00248-016-0881-y] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2016] [Accepted: 10/17/2016] [Indexed: 06/06/2023]
Abstract
Constructed wetlands (CWs) constitute an interesting alternative option to conventional systems for wastewater treatment. This technology is based on the utilization of the concerted activity of microorganisms for the removal of contaminants. Consequently, knowledge on the microbial assemblages dwelling CWs and the different environmental factors which can alter their activities is crucial for understanding their performance. In the last decades, the use of molecular techniques to characterize these communities and more recently, application of -omics tools, have broaden our view of microbial diversity and function in wastewater microbiology. In this manuscript, a review of the current knowledge on microbial diversity in CWs is offered, placing particular emphasis on the different molecular studies carried out in this field. The effect of environmental conditions, such as plant species, hydraulic design, water depth, organic carbon, temperature and substrate type on prokaryotic communities has been carefully revised, and the different studies highlight the importance of these factors in carbon, nitrogen and sulfur cycles. Overall, the novel -omics open a new horizon to study the diversity and ecophysiology of microbial assemblages and their interactions in CWs, particularly for those microorganisms belonging to the rare biosphere not detectable with conventional molecular techniques.
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Affiliation(s)
- Olga Sánchez
- Departament de Genètica i Microbiologia, Facultat de Biociències, Universitat Autònoma de Barcelona, 08193, Bellaterra, Spain.
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26
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Saxena G, Chandra R, Bharagava RN. Environmental Pollution, Toxicity Profile and Treatment Approaches for Tannery Wastewater and Its Chemical Pollutants. REVIEWS OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2017; 240:31-69. [PMID: 26795766 DOI: 10.1007/398_2015_5009] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Leather industries are key contributors in the economy of many developing countries, but unfortunately they are facing serious challenges from the public and governments due to the associated environmental pollution. There is a public outcry against the industry due to the discharge of potentially toxic wastewater having alkaline pH, dark brown colour, unpleasant odour, high biological and chemical oxygen demand, total dissolved solids and a mixture of organic and inorganic pollutants. Various environment protection agencies have prioritized several chemicals as hazardous and restricted their use in leather processing however; many of these chemicals are used and discharged in wastewater. Therefore, it is imperative to adequately treat/detoxify the tannery wastewater for environmental safety. This paper provides a detail review on the environmental pollution and toxicity profile of tannery wastewater and chemicals. Furthermore, the status and advances in the existing treatment approaches used for the treatment and/or detoxification of tannery wastewater at both laboratory and pilot/industrial scale have been reviewed. In addition, the emerging treatment approaches alone or in combination with biological treatment approaches have also been considered. Moreover, the limitations of existing and emerging treatment approaches have been summarized and potential areas for further investigations have been discussed. In addition, the clean technologies for waste minimization, control and management are also discussed. Finally, the international legislation scenario on discharge limits for tannery wastewater and chemicals has also been discussed country wise with discharge standards for pollution prevention due to tannery wastewater.
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Affiliation(s)
- Gaurav Saxena
- Laboratory for Bioremediation and Metagenomic Research (LBMR), Department of Environmental Microbiology (DEM), School for Environmental Sciences (SES), Babasaheb Bhimrao Ambedkar University (A Central University), Vidya Vihar, Raebareli Road, Lucknow, 226 025, Uttar Pradesh, India
| | - Ram Chandra
- Environmental Microbiology Section, Environmental Toxicology Group, Council of Scientific and Industrial Research (CSIR), Indian Institute of Toxicology Research (IITR), 80, M.G. Marg, Lucknow, 226 001, Uttar Pradesh, India
| | - Ram Naresh Bharagava
- Laboratory for Bioremediation and Metagenomic Research (LBMR), Department of Environmental Microbiology (DEM), School for Environmental Sciences (SES), Babasaheb Bhimrao Ambedkar University (A Central University), Vidya Vihar, Raebareli Road, Lucknow, 226 025, Uttar Pradesh, India.
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27
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Long Y, Yi H, Chen S, Zhang Z, Cui K, Bing Y, Zhuo Q, Li B, Xie S, Guo Q. Influences of plant type on bacterial and archaeal communities in constructed wetland treating polluted river water. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2016; 23:19570-9. [PMID: 27392623 DOI: 10.1007/s11356-016-7166-3] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2016] [Accepted: 06/28/2016] [Indexed: 05/12/2023]
Abstract
Both bacteria and archaeal communities can play important roles in biogeochemical processes in constructed wetland (CW) system. However, the influence of plant type on microbial community in surface water CW remains unclear. The present study investigated bacterial and archaeal communities in five surface water CW systems with different plant species. The abundance, richness, and diversity of both bacterial and archaeal communities considerably differed in these five CW systems. Compared with the other three CW systems, the CW systems planted with Vetiveria zizanioides or Juncus effusus L. showed much higher bacterial abundance but lower archaeal abundance. Bacteria outnumbered archaea in each CW system. Moreover, the CW systems planted with V. zizanioides or J. effusus L. had relatively lower archaeal but higher bacterial richness and diversity. In each CW system, bacterial community displayed much higher richness and diversity than archaeal community. In addition, a remarkable difference of both bacterial and archaeal community structures was observed in the five studied CW systems. Proteobacteria was the most abundant bacterial group (accounting for 33-60 %). Thaumarchaeota organisms (57 %) predominated in archaeal communities in CW systems planted with V. zizanioides or J. effusus L., while Woesearchaeota (23 or 24 %) and Euryarchaeota (23 or 15 %) were the major archaeal groups in CW systems planted with Cyperus papyrus or Canna indica L. Archaeal community in CW planted with Typha orientalis Presl was mainly composed of unclassified archaea. Therefore, plant type exerted a considerable influence on microbial community in surface water CW system.
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Affiliation(s)
- Yan Long
- Key Laboratory of Water/Soil Toxic Pollutants Control and Bioremediation of Guangdong Higher Education Institutes, School of Environment, Jinan University, Guangzhou, 510632, China
| | - Hao Yi
- South China Institute of Environmental Sciences (SCIES), Ministry of Environment Protection (MEP), Guangzhou, 510655, China
| | - Sili Chen
- South China Institute of Environmental Sciences (SCIES), Ministry of Environment Protection (MEP), Guangzhou, 510655, China
| | - Zhengke Zhang
- South China Institute of Environmental Sciences (SCIES), Ministry of Environment Protection (MEP), Guangzhou, 510655, China
| | - Kai Cui
- South China Institute of Environmental Sciences (SCIES), Ministry of Environment Protection (MEP), Guangzhou, 510655, China
| | - Yongxin Bing
- South China Institute of Environmental Sciences (SCIES), Ministry of Environment Protection (MEP), Guangzhou, 510655, China
| | - Qiongfang Zhuo
- South China Institute of Environmental Sciences (SCIES), Ministry of Environment Protection (MEP), Guangzhou, 510655, China
| | - Bingxin Li
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing, 100871, China
| | - Shuguang Xie
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing, 100871, China.
| | - Qingwei Guo
- South China Institute of Environmental Sciences (SCIES), Ministry of Environment Protection (MEP), Guangzhou, 510655, China.
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28
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Wang B, Zhang C, Li S, Lu G, Lu G, Li S, Zhou Y. An approach to biodegradation of chlorobenzenes: combination of Typha angustifolia and bacterial effects on hexachlorobenzene degradation in water. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2016; 74:1409-1416. [PMID: 27685970 DOI: 10.2166/wst.2016.313] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Although rhizoremediation is an effective approach to remove organic pollutants from the environment, little is known about the mechanism of hexachlorobenzene (HCB) biodegradation in water. In this study, we used Typha angustifolia (T. angustifolia) grown in sterile Hoagland nutrient solution to determine the rhizosphere effects on the ability of bacteria in water to reduce HCB levels. The results revealed that T. angustifolia could facilitate HCB degradation and that the initial HCB concentration was the major factor responsible for HCB degradation in nutrient solution. Furthermore, HCB biodegradation in low-HCB nutrient solution with T. angustifolia fitted the first-order kinetics, owing to the high concentration of total organic carbon, low HCB toxicity, and unique bacterial community in the T. angustifolia rhizosphere. Denaturing gradient gel electrophoresis indicated that the rhizosphere effects and different dosages of HCB have significant effects on the bacterial communities by repressing and favoring certain populations. The most successful bacteria to adapt to HCB contamination was Bacillus sp., while the dominant bacterial phyla in HCB-polluted water were Proteobacteria and Firmicutes.
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Affiliation(s)
- Bei Wang
- Research Center for Pollution Control and Ecological Restoration, Yuxi Normal University, Yuxi 653100, China E-mail: ; Institute of Ecology and Geobotany, Yunnan University, Kunming 650091, China; These authors equally contributed to this work
| | - Cuiping Zhang
- Research Center for Pollution Control and Ecological Restoration, Yuxi Normal University, Yuxi 653100, China E-mail: ; These authors equally contributed to this work
| | - Shuying Li
- Research Center for Pollution Control and Ecological Restoration, Yuxi Normal University, Yuxi 653100, China E-mail:
| | - Guangqiu Lu
- Research Center for Pollution Control and Ecological Restoration, Yuxi Normal University, Yuxi 653100, China E-mail:
| | - Guoli Lu
- Research Center for Pollution Control and Ecological Restoration, Yuxi Normal University, Yuxi 653100, China E-mail:
| | - Song Li
- Research Center for Pollution Control and Ecological Restoration, Yuxi Normal University, Yuxi 653100, China E-mail:
| | - Yuanqing Zhou
- Research Center for Pollution Control and Ecological Restoration, Yuxi Normal University, Yuxi 653100, China E-mail:
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29
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Babatunde AO, Miranda-CasoLuengo R, Imtiaz M, Zhao YQ, Meijer WG. Performance assessment and microbial diversity of two pilot scale multi-stage sub-surface flow constructed wetland systems. J Environ Sci (China) 2016; 46:38-46. [PMID: 27521934 DOI: 10.1016/j.jes.2015.02.018] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2014] [Revised: 01/30/2015] [Accepted: 02/16/2015] [Indexed: 06/06/2023]
Abstract
This study assessed the performance and diversity of microbial communities in multi-stage sub-surface flow constructed wetland systems (CWs). Our aim was to assess the impact of configuration on treatment performance and microbial diversity in the systems. Results indicate that at loading rates up to 100gBOD5/(m(2)·day), similar treatment performances can be achieved using either a 3 or 4 stage configuration. In the case of phosphorus (P), the impact of configuration was less obvious and a minimum of 80% P removal can be expected for loadings up to 10gP/(m(2)·day) based on the performance results obtained within the first 16months of operation. Microbial analysis showed an increased bacterial diversity in stage four compared to the first stage. These results indicate that the design and configuration of multi-stage constructed wetland systems may have an impact on the treatment performance and the composition of the microbial community in the systems, and such knowledge can be used to improve their design and performance.
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Affiliation(s)
- A O Babatunde
- Hydro-environmental Research Centre, Institute of Environment and Sustainability, Cardiff School of Engineering, Cardiff University, Queen's Buildings, The Parade, Cardiff, CF24 3AA, UK; UCD School of Civil, Structural and Environmental Engineering, Newstead Building, University College Dublin, Belfield, Dublin 4, Ireland.
| | - Raul Miranda-CasoLuengo
- UCD School of Biomolecular and Biomedical Science, Conway Institute, University College Dublin, Belfield, Dublin 4, Ireland
| | - Mehreen Imtiaz
- UCD School of Biomolecular and Biomedical Science, Conway Institute, University College Dublin, Belfield, Dublin 4, Ireland
| | - Y Q Zhao
- UCD School of Civil, Structural and Environmental Engineering, Newstead Building, University College Dublin, Belfield, Dublin 4, Ireland
| | - Wim G Meijer
- UCD School of Biomolecular and Biomedical Science, Conway Institute, University College Dublin, Belfield, Dublin 4, Ireland
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30
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Zhang D, Luo J, Lee ZMP, Gersberg RM, Liu Y, Tan SK, Ng WJ. Ibuprofen removal in horizontal subsurface flow constructed wetlands: treatment performance and fungal community dynamics. ENVIRONMENTAL TECHNOLOGY 2016; 37:1467-1479. [PMID: 26581707 DOI: 10.1080/09593330.2015.1119201] [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: 06/05/2023]
Abstract
The treatment performance of ibuprofen (IBP)-enriched wastewater by horizontal subsurface flow constructed wetlands planted with cattail (Typha angustifolia) and unplanted control mesocosms was investigated. Removal efficiencies of IBP were significantly (p < .05) enhanced in the planted mesocosms (78.5%) compared to those in the unplanted beds (57.9%). An 18S rRNA gene high-throughput pyrosequencing approach was used to investigate the effects of IBP on the structure of the fungal community in these wetland systems. The overall diversity of the fungal community was reduced under the IBP exposure. Taxonomic analysis revealed that 62.2% of the fungal sequences were affiliated with Basidiomycota, followed by Ascomycota (37.4%) at the phylum level. Uncultured fungus (48.2%), Chaetomium sp. (14.2%), Aspergillus sp. (12.4%), Trichoderma sp. (5.7%), Cladosporium sp. (5.4%), and Emericellopsis sp. (5.2%) were identified as dominant genera. At the genus level, a distinct profile of the fungal community in the IBP-enriched mesocosms was observed as compared to the control beds, and as well specific fungal genera were enhanced in the planted beds, regardless of IBP enrichment. However, despite these differences, the composition of the fungal community (as measured by Bray-Curtis similarity) was mostly unaffected by the significant IBP enrichment. On the other hand, a consistent similarity pattern of fungal community structure in the planted mesocosms suggests that the presence of higher macrophytes in the wetland systems may well help shape the fungal community structure.
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Affiliation(s)
- Dongqing Zhang
- a Advanced Environmental Biotechnology Centre, Nanyang Environment & Water Research Institute , Nanyang Technological University , Singapore , Singapore
| | - Jinxue Luo
- b Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Sciences , Chinese Academy of Sciences , Beijing People's Republic of China
| | - Zarraz May Ping Lee
- a Advanced Environmental Biotechnology Centre, Nanyang Environment & Water Research Institute , Nanyang Technological University , Singapore , Singapore
| | - Richard M Gersberg
- c Graduate School of Public Health , San Diego State University , San Diego , CA , USA
| | - Yu Liu
- a Advanced Environmental Biotechnology Centre, Nanyang Environment & Water Research Institute , Nanyang Technological University , Singapore , Singapore
| | - Soon Keat Tan
- a Advanced Environmental Biotechnology Centre, Nanyang Environment & Water Research Institute , Nanyang Technological University , Singapore , Singapore
| | - Wun Jern Ng
- a Advanced Environmental Biotechnology Centre, Nanyang Environment & Water Research Institute , Nanyang Technological University , Singapore , Singapore
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31
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Corbella C, Guivernau M, Viñas M, Puigagut J. Operational, design and microbial aspects related to power production with microbial fuel cells implemented in constructed wetlands. WATER RESEARCH 2015; 84:232-242. [PMID: 26253894 DOI: 10.1016/j.watres.2015.06.005] [Citation(s) in RCA: 65] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2015] [Revised: 06/03/2015] [Accepted: 06/05/2015] [Indexed: 06/04/2023]
Abstract
This work aimed at determining the amount of energy that can be harvested by implementing microbial fuel cells (MFC) in horizontal subsurface constructed wetlands (HSSF CWs) during the treatment of real domestic wastewater. To this aim, MFC were implemented in a pilot plant based on two HSSF CW, one fed with primary settled wastewater (Settler line) and the other fed with the effluent of a hydrolytic up-flow sludge blanket reactor (HUSB line). The eubacterial and archaeal community was profiled on wetland gravel, MFC electrodes and primary treated wastewater by means of 16S rRNA gene-based 454-pyrosequencing and qPCR of 16S rRNA and mcrA genes. Maximum current (219 mA/m(2)) and power (36 mW/m(2)) densities were obtained for the HUSB line. Power production pattern correlated well with water level fluctuations within the wetlands, whereas the type of primary treatment implemented had a significant impact on the diversity and relative abundance of eubacteria communities colonizing MFC. It is worth noticing the high predominance (13-16% of relative abundance) of one OTU belonging to Geobacter on active MFC of the HUSB line that was absent for the settler line MFC. Hence, MFC show promise for power production in constructed wetlands receiving the effluent of a HUSB reactor.
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Affiliation(s)
- Clara Corbella
- GEMMA, Department of Hydraulic, Maritime and Environmental Engineering, Universitat Politècnica de Catalunya, c/ Jordi Girona 1-3, Building D1, E-08034 Barcelona, Spain
| | - Miriam Guivernau
- GIRO Joint Research Unit IRTA-UPC, IRTA, Torre Marimon, 08140 Caldes de Montbui, Barcelona, Spain
| | - Marc Viñas
- GIRO Joint Research Unit IRTA-UPC, IRTA, Torre Marimon, 08140 Caldes de Montbui, Barcelona, Spain
| | - Jaume Puigagut
- GEMMA, Department of Hydraulic, Maritime and Environmental Engineering, Universitat Politècnica de Catalunya, c/ Jordi Girona 1-3, Building D1, E-08034 Barcelona, Spain.
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Improving oxygen dissolution and distribution in a bioreactor with enhanced simultaneous COD and nitrogen removal by simply introducing micro-pressure and swirl. Appl Microbiol Biotechnol 2015; 99:8741-9. [DOI: 10.1007/s00253-015-6714-y] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2015] [Revised: 05/15/2015] [Accepted: 05/19/2015] [Indexed: 11/26/2022]
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Wu H, Zhang J, Ngo HH, Guo W, Hu Z, Liang S, Fan J, Liu H. A review on the sustainability of constructed wetlands for wastewater treatment: Design and operation. BIORESOURCE TECHNOLOGY 2015; 175:594-601. [PMID: 25453440 DOI: 10.1016/j.biortech.2014.10.068] [Citation(s) in RCA: 397] [Impact Index Per Article: 39.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/23/2014] [Revised: 10/11/2014] [Accepted: 10/13/2014] [Indexed: 06/04/2023]
Abstract
Constructed wetlands (CWs) have been used as a green technology to treat various wastewaters for several decades. CWs offer a land-intensive, low-energy, and less-operational-requirements alternative to conventional treatment systems, especially for small communities and remote locations. However, the sustainable operation and successful application of these systems remains a challenge. Hence, this paper 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 on their sustainable design and operation for wastewater treatment. Firstly, a brief summary on the definition, classification and application of current CWs was presented. The design parameters and operational conditions of CWs including plant species, substrate types, water depth, hydraulic load, hydraulic retention time and feeding mode related to the sustainable operation for wastewater treatments were then discussed. Lastly, future research on improving the stability and sustainability of CWs were highlighted.
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Affiliation(s)
- Haiming Wu
- College of Resources and Environment, Northwest A & F University, Yangling, Shaanxi 712100, China; Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science & Engineering, Shandong University, Jinan 250100, PR China
| | - Jian Zhang
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science & Engineering, Shandong University, Jinan 250100, PR 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
| | - Zhen Hu
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science & Engineering, Shandong University, Jinan 250100, PR China
| | - Shuang Liang
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science & Engineering, Shandong University, Jinan 250100, PR China
| | - Jinlin Fan
- National Engineering Laboratory of Coal-Fired Pollutants Emission Reduction, Shandong University, Jinan 250061, PR China
| | - Hai Liu
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science & Engineering, Shandong University, Jinan 250100, PR China
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Saba B, Jabeen M, Khalid A, Aziz I, Christy AD. Effectiveness of Rice Agricultural Waste, Microbes and Wetland Plants in the Removal of Reactive Black-5 Azo Dye in Microcosm Constructed Wetlands. INTERNATIONAL JOURNAL OF PHYTOREMEDIATION 2015; 17:1060-1067. [PMID: 25849115 DOI: 10.1080/15226514.2014.1003787] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Azo dyes are commonly generated as effluent pollutants by dye using industries, causing contamination of surface and ground water. Various strategies are employed to treat such wastewater; however, a multi-faceted treatment strategy could be more effective for complete removal of azo dyes from industrial effluent than any single treatment. In the present study, rice husk material was used as a substratum in two constructed wetlands (CWs) and augmented with microorganisms in the presence of wetland plants to effectively treat dye-polluted water. To evaluate the efficiency of each process the study was divided into three levels, i.e., adsorption of dye onto the substratum, phytoremediation within the CW and then bioremediation along with the previous two processes in the augmented CW. The adsorption process was helpful in removing 50% dye in presence of rice husk while 80% in presence of rice husk biocahr. Augmentation of microorganisms in CW systems has improved dye removal efficiency to 90%. Similarly presence of microorganisms enhanced removal of total nitrogen (68% 0 and Total phosphorus (75%). A significant improvement in plant growth was also observed by measuring plant height, number of leaves and leave area. These findings suggest the use of agricultural waste as part of a CW substratum can provide enhanced removal of textile dyes.
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Affiliation(s)
- Beenish Saba
- a Department of Food Agricultural and Biological Engineering , The Ohio State University , Columbus , Ohio
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Desta AF, Assefa F, Leta S, Stomeo F, Wamalwa M, Njahira M, Appolinaire D. Microbial community structure and diversity in an integrated system of anaerobic-aerobic reactors and a constructed wetland for the treatment of tannery wastewater in Modjo, Ethiopia. PLoS One 2014; 9:e115576. [PMID: 25541981 PMCID: PMC4277355 DOI: 10.1371/journal.pone.0115576] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2014] [Accepted: 11/29/2014] [Indexed: 11/18/2022] Open
Abstract
A culture-independent approach was used to elucidate the microbial diversity and structure in the anaerobic-aerobic reactors integrated with a constructed wetland for the treatment of tannery wastewater in Modjo town, Ethiopia. The system has been running with removal efficiencies ranging from 94%-96% for COD, 91%-100% for SO4(2-) and S(2-), 92%-94% for BOD, 56%-82% for total Nitrogen and 2%-90% for NH3-N. 16S rRNA gene clone libraries were constructed and microbial community assemblies were determined by analysis of a total of 801 unique clone sequences from all the sites. Operational Taxonomic Unit (OTU)--based analysis of the sequences revealed highly diverse communities in each of the reactors and the constructed wetland. A total of 32 phylotypes were identified with the dominant members affiliated to Clostridia (33%), Betaproteobacteria (10%), Bacteroidia (10%), Deltaproteobacteria (9%) and Gammaproteobacteria (6%). Sequences affiliated to the class Clostridia were the most abundant across all sites. The 801 sequences were assigned to 255 OTUs, of which 3 OTUs were shared among the clone libraries from all sites. The shared OTUs comprised 80 sequences belonging to Clostridiales Family XIII Incertae Sedis, Bacteroidetes and unclassified bacterial group. Significantly different communities were harbored by the anaerobic, aerobic and rhizosphere sites of the constructed wetland. Numerous representative genera of the dominant bacterial classes obtained from the different sample sites of the integrated system have been implicated in the removal of various carbon- containing pollutants of natural and synthetic origins. To our knowledge, this is the first report of microbial community structure in tannery wastewater treatment plant from Ethiopia.
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Affiliation(s)
- Adey Feleke Desta
- Institute of Biotechnology, Addis Ababa University, Addis Ababa, Ethiopia
| | - Fassil Assefa
- Institute of Biotechnology, Addis Ababa University, Addis Ababa, Ethiopia
| | - Seyoum Leta
- Centre for Environmental Science, College of Natural Sciences, Addis Ababa University, Addis Ababa, Ethiopia
| | - Francesca Stomeo
- Biosciences eastern and central Africa- International Livestock Research Institute (BecA-ILRI) Hub, Nairobi, Kenya
| | - Mark Wamalwa
- Biosciences eastern and central Africa- International Livestock Research Institute (BecA-ILRI) Hub, Nairobi, Kenya
| | - Moses Njahira
- Biosciences eastern and central Africa- International Livestock Research Institute (BecA-ILRI) Hub, Nairobi, Kenya
| | - Djikeng Appolinaire
- Biosciences eastern and central Africa- International Livestock Research Institute (BecA-ILRI) Hub, Nairobi, Kenya
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Rhizosphere bacterial community of Typha angustifolia L. and water quality in a river wetland supplied with reclaimed water. Appl Microbiol Biotechnol 2014; 99:2883-93. [DOI: 10.1007/s00253-014-6182-9] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2014] [Revised: 10/17/2014] [Accepted: 10/20/2014] [Indexed: 10/24/2022]
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Dao L, Grigoryeva T, Laikov A, Devjatijarov R, Ilinskaya O. Full-scale bioreactor pretreatment of highly toxic wastewater from styrene and propylene oxide production. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2014; 108:195-202. [PMID: 25086231 DOI: 10.1016/j.ecoenv.2014.07.012] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2014] [Revised: 07/09/2014] [Accepted: 07/11/2014] [Indexed: 06/03/2023]
Abstract
The wastewater originating from simultaneous production of styrene and propylene oxide (SPO) is classified as highly polluted with chemical oxygen demand level in the range 5965 to 9137mgL(-1)-as well as highly toxic. The dilution factor providing for a 10 percent toxic effect of wastewater samples in a test with Paramecium caudatum was 8.0-9.5. Biological approach for pretreatment and detoxification of the wastewater under full-scale bioreactor conditions was investigated. The number of suspended microorganisms and the clean up efficiency were increased up to 5.5-6.58×10(8)CFUmL(-1) and 88 percent, respectively during the bioreactor's operation. Isolates in the Citrobacter, Burkholderia, Pseudomonas, and Paracoccus genera were dominant in the mature suspended, as well as the immobilized microbial community of the bioreactor. The most dominant representatives were tested for their ability to biodegrade the major components of the SPO wastewater and evidence of their role in the treatment process was demonstrated. The investigated pretreatment process allowed the wastewater to be detoxified for conventional treatment with activated sludge and was closely related to the maturation of the bioreactor's microbial community.
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Affiliation(s)
- Linh Dao
- Department of Microbiology, Kazan (Volga Region) Federal University, 420008 Kazan, Russian Federation.
| | - Tatiana Grigoryeva
- Department of Microbiology, Kazan (Volga Region) Federal University, 420008 Kazan, Russian Federation
| | - Alexander Laikov
- Department of Microbiology, Kazan (Volga Region) Federal University, 420008 Kazan, Russian Federation
| | - Ruslan Devjatijarov
- Department of Microbiology, Kazan (Volga Region) Federal University, 420008 Kazan, Russian Federation
| | - Olga Ilinskaya
- Department of Microbiology, Kazan (Volga Region) Federal University, 420008 Kazan, Russian Federation
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Guittonny-Philippe A, Masotti V, Höhener P, Boudenne JL, Viglione J, Laffont-Schwob I. Constructed wetlands to reduce metal pollution from industrial catchments in aquatic Mediterranean ecosystems: a review to overcome obstacles and suggest potential solutions. ENVIRONMENT INTERNATIONAL 2014; 64:1-16. [PMID: 24361512 DOI: 10.1016/j.envint.2013.11.016] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2013] [Revised: 11/22/2013] [Accepted: 11/26/2013] [Indexed: 06/03/2023]
Abstract
In the Mediterranean area, surface waters often have low discharge or renewal rates, hence metal contamination from industrialised catchments can have a high negative impact on the physico-chemical and biological water quality. In a context of climate and anthropological changes, it is necessary to provide an integrative approach for the prevention and control of metal pollution, in order to limit its impact on water resources, biodiversity, trophic network and human health. For this purpose, introduction of constructed wetlands (CWs) between natural aquatic ecosystems and industrialised zones or catchments is a promising strategy for eco-remediation. Analysis of the literature has shown that further research must be done to improve CW design, selection and management of wetland plant species and catchment organisation, in order to ensure the effectiveness of CWs in Mediterranean environments. Firstly, the parameters of basin design that have the greatest influence on metal removal processes must be identified, in order to better focus rhizospheric processes on specific purification objectives. We have summarised in a single diagram the relationships between the design parameters of a CW basin and the physico-chemical and biological processes of metal removal, on the basis of 21 mutually consistent papers. Secondly, in order to optimise the selection and distribution of helophytes in CWs, it is necessary to identify criteria of choice for the plant species that will best fit the remediation objectives and environmental and economic constraints. We have analysed the factors determining plant metal uptake efficiency in CWs on the basis of a qualitative meta-analysis of 13 studies with a view to determine whether the part played by metal uptake by plants is relevant in comparison with the other removal processes. Thirdly, we analysed the parameters to consider for establishing suitable management strategies for CWs and how they affect the whole CW design process. Finally, we propose monitoring and policy measures to facilitate the integration of CWs within Mediterranean industrialised catchments.
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Affiliation(s)
- Anna Guittonny-Philippe
- Aix-Marseille Université-CNRS, Institut Méditerranéen de Biodiversité et d'Ecologie marine et continentale UMR 7263/IRD 237 IMBE, 3 pl. Victor Hugo, Case 4, 13331 Marseille Cedex 3, France; ECO-MED SARL, Tour Méditerranée, 65 Avenue Jules Cantini, 13298 Marseille Cedex 20, France.
| | - Véronique Masotti
- Aix-Marseille Université-CNRS, Institut Méditerranéen de Biodiversité et d'Ecologie marine et continentale UMR 7263/IRD 237 IMBE, 3 pl. Victor Hugo, Case 4, 13331 Marseille Cedex 3, France.
| | - Patrick Höhener
- Aix-Marseille Université-CNRS, Laboratoire Chimie Environnement, FRE 3416, 3 pl. Victor Hugo, Case 29, 13331 Marseille Cedex 3, France.
| | - Jean-Luc Boudenne
- Aix-Marseille Université-CNRS, Laboratoire Chimie Environnement, FRE 3416, 3 pl. Victor Hugo, Case 29, 13331 Marseille Cedex 3, France.
| | - Julien Viglione
- ECO-MED SARL, Tour Méditerranée, 65 Avenue Jules Cantini, 13298 Marseille Cedex 20, France.
| | - Isabelle Laffont-Schwob
- Aix-Marseille Université-CNRS, Institut Méditerranéen de Biodiversité et d'Ecologie marine et continentale UMR 7263/IRD 237 IMBE, 3 pl. Victor Hugo, Case 4, 13331 Marseille Cedex 3, France
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Prevalence of potentially thermophilic microorganisms in biofilms from greenhouse-enclosed drip irrigation systems. Arch Microbiol 2014; 196:219-26. [DOI: 10.1007/s00203-014-0957-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2013] [Revised: 01/03/2014] [Accepted: 01/27/2014] [Indexed: 10/25/2022]
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Calheiros CSC, Rangel AOSS, Castro PML. Constructed wetlands for tannery wastewater treatment in Portugal: ten years of experience. INTERNATIONAL JOURNAL OF PHYTOREMEDIATION 2014; 16:859-870. [PMID: 24933889 DOI: 10.1080/15226514.2013.798622] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Wastewaters from tannery industry are complex in composition and providing adequate treatment can be difficult. Constructed wetlands (CW) are regarded as an alternative treatment to the conventional biological systems, as a developing cost-effective and environmentally friendly phytoremediation technology. The present review compiles and integrates information on CWs technology for the needs of the tannery sector. The following issues arise as crucial for the implementation of such systems, namely i) an accurate wastewater characterization and an effective pretreatment before reaching the CW, ii) choosing the plants species better adapted to the imposed conditions, iii) substrate selection and iv) range of organic loadings applied. The examples practiced in Portugal give indication that horizontal subsurface flow systems, with expanded clay media, are a suitable option to be considered when dealing with high organic loading tannery wastewater (up to c.a. 3800 kgCODha(-1)d(-1)), being resilient to a wide range of hydraulic variations. Plants such as Phragmites and Typha have shown to be adequate for tannery wastewater depuration, with Arundo donax proving resilient to high salinity wastewaters. The flexibility of implementation allows the CW to be adapted to different sites with different configurations, being suitable as main secondary or tertiary treatment stage.
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Biomass, nutrients and nutritive value of Persicaria salicifolia Willd. in the water courses of Nile Delta, Egypt. RENDICONTI LINCEI-SCIENZE FISICHE E NATURALI 2013. [DOI: 10.1007/s12210-013-0269-6] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Bacterial structure and spatiotemporal distribution in a horizontal subsurface flow constructed wetland. Appl Microbiol Biotechnol 2013; 98:3191-203. [DOI: 10.1007/s00253-013-5341-8] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2013] [Revised: 10/14/2013] [Accepted: 10/17/2013] [Indexed: 10/26/2022]
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Marques APGC, Duque AF, Bessa VS, Mesquita RBR, Rangel AOSS, Castro PML. Performance of an aerobic granular sequencing batch reactor fed with wastewaters contaminated with Zn2+. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2013; 128:877-882. [PMID: 23880431 DOI: 10.1016/j.jenvman.2013.06.052] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2013] [Revised: 06/17/2013] [Accepted: 06/24/2013] [Indexed: 06/02/2023]
Abstract
The main aim of this study was to investigate the performance of an aerobic granular sludge sequencing batch reactor (AGS-SBR) receiving water streams supplied with different loads of Zn(2+) (50 and 100 mg L(-1)) during an operation of 866 cycles (ca. 109 days). When the metal was not fed, chemical oxygen demand (COD), PO4(3-) and NH4(+) were efficiently removed, with efficiencies of 56, 23 and 72% respectively. DGGE profiles showed that Zn(2+) supply negatively affected the bacterial diversity and community structure of the granules. Consequently, the shock loadings with Zn(2+), particularly at the higher levels (100 mg L(-1)), affected the nutrient removal in the AGS-SBR, although the reactor still generally complied with admissible legal values concerning organic matter, nitrogen and Zn. Simultaneous removal of PO4(3-) and TSS in such conditions needs further refining but the application of aerobic granular SBR in the treatment of Zn(2+) contaminated wastewaters seems viable.
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Affiliation(s)
- Ana P G C Marques
- CBQF - Centro de Biotecnologia e Química Fina, Laboratório Associado, Escola Superior de Biotecnologia, Universidade Católica Portuguesa/Porto, Rua Dr. António Bernardino de Almeida, 4200-072 Porto, Portugal.
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Lofrano G, Meriç S, Zengin GE, Orhon D. Chemical and biological treatment technologies for leather tannery chemicals and wastewaters: a review. THE SCIENCE OF THE TOTAL ENVIRONMENT 2013; 461-462:265-281. [PMID: 23735721 DOI: 10.1016/j.scitotenv.2013.05.004] [Citation(s) in RCA: 189] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2013] [Revised: 05/01/2013] [Accepted: 05/02/2013] [Indexed: 06/02/2023]
Abstract
Although the leather tanning industry is known to be one of the leading economic sectors in many countries, there has been an increasing environmental concern regarding the release of various recalcitrant pollutants in tannery wastewater. It has been shown that biological processes are presently known as the most environmental friendly but inefficient for removal of recalcitrant organics and micro-pollutants in tannery wastewater. Hence emerging technologies such as advanced oxidation processes and membrane processes have been attempted as integrative to biological treatment for this sense. This paper, as the-state-of-the-art, attempts to revise the over world trends of treatment technologies and advances for pollution prevention from tannery chemicals and wastewater. It can be elucidated that according to less extent advances in wastewater minimization as well as in leather production technology and chemicals substitution, biological and chemical treatment processes have been progressively studied. However, there has not been a full scale application yet of those emerging technologies using advanced oxidation although some of them proved good achievements to remove xenobiotics present in tannery wastewater. It can be noted that advanced oxidation technologies integrated with biological processes will remain in the agenda of the decision makers and water sector to apply the best prevention solution for the future tanneries.
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Affiliation(s)
- Giusy Lofrano
- Department of Environment, Waste Division, Salerno Province, via Mauri, 61-84132 Salerno, Italy.
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Jasper JT, Nguyen MT, Jones ZL, Ismail NS, Sedlak DL, Sharp JO, Luthy RG, Horne AJ, Nelson KL. Unit Process Wetlands for Removal of Trace Organic Contaminants and Pathogens from Municipal Wastewater Effluents. ENVIRONMENTAL ENGINEERING SCIENCE 2013; 30:421-436. [PMID: 23983451 PMCID: PMC3746285 DOI: 10.1089/ees.2012.0239] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2012] [Accepted: 01/22/2013] [Indexed: 05/05/2023]
Abstract
Treatment wetlands have become an attractive option for the removal of nutrients from municipal wastewater effluents due to their low energy requirements and operational costs, as well as the ancillary benefits they provide, including creating aesthetically appealing spaces and wildlife habitats. Treatment wetlands also hold promise as a means of removing other wastewater-derived contaminants, such as trace organic contaminants and pathogens. However, concerns about variations in treatment efficacy of these pollutants, coupled with an incomplete mechanistic understanding of their removal in wetlands, hinder the widespread adoption of constructed wetlands for these two classes of contaminants. A better understanding is needed so that wetlands as a unit process can be designed for their removal, with individual wetland cells optimized for the removal of specific contaminants, and connected in series or integrated with other engineered or natural treatment processes. In this article, removal mechanisms of trace organic contaminants and pathogens are reviewed, including sorption and sedimentation, biotransformation and predation, photolysis and photoinactivation, and remaining knowledge gaps are identified. In addition, suggestions are provided for how these treatment mechanisms can be enhanced in commonly employed unit process wetland cells or how they might be harnessed in novel unit process cells. It is hoped that application of the unit process concept to a wider range of contaminants will lead to more widespread application of wetland treatment trains as components of urban water infrastructure in the United States and around the globe.
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Affiliation(s)
- Justin T. Jasper
- Engineering Research Center for Re-Inventing the Nation's Urban Water Infrastructure (ReNUWIt), National Science Foundation, Stanford, California
- Department of Civil & Environmental Engineering, University of California, Berkeley, California
| | - Mi T. Nguyen
- Engineering Research Center for Re-Inventing the Nation's Urban Water Infrastructure (ReNUWIt), National Science Foundation, Stanford, California
- Department of Civil & Environmental Engineering, University of California, Berkeley, California
| | - Zackary L. Jones
- Engineering Research Center for Re-Inventing the Nation's Urban Water Infrastructure (ReNUWIt), National Science Foundation, Stanford, California
- Department of Civil & Environmental Engineering, Colorado School of Mines, Golden, Colorado
| | - Niveen S. Ismail
- Engineering Research Center for Re-Inventing the Nation's Urban Water Infrastructure (ReNUWIt), National Science Foundation, Stanford, California
- Department of Civil & Environmental Engineering, Stanford University, Stanford, California
| | - David L. Sedlak
- Engineering Research Center for Re-Inventing the Nation's Urban Water Infrastructure (ReNUWIt), National Science Foundation, Stanford, California
- Department of Civil & Environmental Engineering, University of California, Berkeley, California
| | - Jonathan O. Sharp
- Engineering Research Center for Re-Inventing the Nation's Urban Water Infrastructure (ReNUWIt), National Science Foundation, Stanford, California
- Department of Civil & Environmental Engineering, Colorado School of Mines, Golden, Colorado
| | - Richard G. Luthy
- Engineering Research Center for Re-Inventing the Nation's Urban Water Infrastructure (ReNUWIt), National Science Foundation, Stanford, California
- Department of Civil & Environmental Engineering, Stanford University, Stanford, California
| | - Alex J. Horne
- Engineering Research Center for Re-Inventing the Nation's Urban Water Infrastructure (ReNUWIt), National Science Foundation, Stanford, California
- Department of Civil & Environmental Engineering, University of California, Berkeley, California
| | - Kara L. Nelson
- Engineering Research Center for Re-Inventing the Nation's Urban Water Infrastructure (ReNUWIt), National Science Foundation, Stanford, California
- Department of Civil & Environmental Engineering, University of California, Berkeley, California
- Corresponding author: Department of Civil and Environmental Engineering, University of California, Berkeley, CA 94720-1710. Phone: 510-643-5023; Fax: 510-642-7483. E-mail:
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Kim IS, Ekpeghere K, Ha SY, Kim SH, Kim BS, Song B, Chun J, Chang JS, Kim HG, Koh SC. An eco-friendly treatment of tannery wastewater using bioaugmentation with a novel microbial consortium. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART A, TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING 2013; 48:1732-1739. [PMID: 23947713 DOI: 10.1080/10934529.2013.815563] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
A novel microbial consortium (BM-S-1) enriched from natural soils was successfully used to treat tannery wastewater from leather manufacturing industries in Korea on a pilot scale. The objective of this study was to determine whether augmentation with a novel microbial consortium BM-S-1could successfully treat the recalcitrant wastewater without chemical pre-treatment in a tannery wastewater treatment system. Chemical oxygen demand (COD), total nitrogen (TN) and total phosphorus (TP) were monitored for water quality. The microbial population dynamics were analyzed using pyrosequencing, and denitrifying bacteria were quantified using real-time PCR (RT-PCR). The removal efficiencies for COD, TN and TP were greater than 91%, 79%, and 90%, respectively. The dominant phyla in the buffering tank (B), primary aeration (PA), secondary aeration (SA) and sludge digestion tank (SD) were Proteobacteria, Firmicutes, Bacteroidetes, Planctomycetes and Deinococcus-Thermus. Cluster analysis based on the UniFrac distance of the species in the different stages showed that the PA is similar to the SA, whereas the B is similar to the SD. qPCR of the nosZ genes showed the highest abundance of denitrifiers in B, which was increased 734-fold compared to the influent (I). It was hypothesized that anaerobic denitrifiers and the diverse microbial community may play important roles in the biological treatment of tannery wastewater. This technology may also contribute to the full-scale treatment of industrial wastewater containing food processing wastewater and marine sediment with high organic content.
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Affiliation(s)
- In-Soo Kim
- Department of Environmental Engineering , Korea Maritime University, Busan, Republic of Korea
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Lu XM, Lu PZ, Huang MS, Dai LP. Seasonal variations and aeration effects on water quality improvements and physiological responses of Nymphaea tetragona Georgi. INTERNATIONAL JOURNAL OF PHYTOREMEDIATION 2013; 15:522-535. [PMID: 23819294 DOI: 10.1080/15226514.2012.716103] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Seasonal variations and aeration effects on water quality improvements and the physiological responses of Nymphaea tetragona Georgi were investigated with mesocosm experiments. Plants were hydroponically cultivated in six purifying tanks (aerated, non-aerated) and the characteristics of the plants were measured. Water quality improvements in purifying tanks were evaluated by comparing to the control tanks. The results showed that continuous aeration affected the plant morphology and physiology. The lengths of the roots, petioles and leaf limbs in aeration conditions were shorter than in non-aeration conditions. Chlorophyll and soluble protein contents of the leaf limbs in aerated tanks decreased, while peroxidase and catalase activities of roots tissues increased. In spring and summer, effects of aeration on the plants were less than in autumn. Total nitrogen (TN) and ammonia nitrogen (NH4(+)-N) in aerated tanks were lower than in non-aerated tanks, while total phosphorus (TP) and dissolved phosphorus (DP) increased in spring and summer. In autumn, effects of aeration on the plants became more significant. TN, NH4(+)-N, TP and DP became higher in aerated tanks than in non-aerated tanks in autumn. This work provided evidences for regulating aeration techniques based on seasonal variations of the plant physiology in restoring polluted stagnant water.
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Affiliation(s)
- Xiao-Ming Lu
- Institute for Eco-environmental Sciences, Wenzhou Vocational College of Science & Technology, Wenzhou, China.
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Rodriguez-Caballero A, Ramond JB, Welz PJ, Cowan DA, Odlare M, Burton SG. Treatment of high ethanol concentration wastewater by biological sand filters: enhanced COD removal and bacterial community dynamics. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2012; 109:54-60. [PMID: 22683841 DOI: 10.1016/j.jenvman.2012.05.005] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2011] [Revised: 05/03/2012] [Accepted: 05/07/2012] [Indexed: 06/01/2023]
Abstract
Winery wastewater is characterized by its high chemical oxygen demand (COD), seasonal occurrence and variable composition, including periodic high ethanol concentrations. In addition, winery wastewater may contain insufficient inorganic nutrients for optimal biodegradation of organic constituents. Two pilot-scale biological sand filters (BSFs) were used to treat artificial wastewater: the first was amended with ethanol and the second with ethanol, inorganic nitrogen (N) and phosphorus (P). A number of biochemical parameters involved in the removal of pollutants through BSF systems were monitored, including effluent chemistry and bacterial community structures. The nutrient supplemented BSF showed efficient COD, N and P removal. Comparison of the COD removal efficiencies of the two BSFs showed that N and P addition enhanced COD removal efficiency by up to 16%. Molecular fingerprinting of BSF sediment samples using denaturing gradient gel electrophoresis (DGGE) showed that amendment with high concentrations of ethanol destabilized the microbial community structure, but that nutrient supplementation countered this effect.
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Affiliation(s)
- A Rodriguez-Caballero
- School of Sustainable Development of Society and Technology, Mälardalens University, Box 883, 721 23 Västerås, Sweden.
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Calheiros CSC, Silva G, Quitério PVB, Crispim LFC, Brix H, Moura SC, Castro PML. Toxicity of high salinity tannery wastewater and effects on constructed wetland plants. INTERNATIONAL JOURNAL OF PHYTOREMEDIATION 2012; 14:669-680. [PMID: 22908635 DOI: 10.1080/15226514.2011.619233] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The toxicity of high salinity tannery wastewater produced after an activated sludge secondary treatment on the germination and seedling growth of Trifolium pratense, a species used as indicator in toxicity tests, was evaluated. Growth was inhibited by wastewater concentrations >25% and undiluted effluent caused a complete germination inhibition. Constructed wetlands (CWs) with Arundo donax or Sarcocornia fruticosa were envisaged to further polish this wastewater. Selection of plant species to use in CWs for industrial wastewater treatment is an important issue, since for a successful establishment they have to tolerate the often harsh wastewater composition. For that, the effects of this wastewater on the growth of Arundo and Sarcocornia were assessed in pot assays. Plants were subject to different wastewater contents (0/50/100%), and both were resilient to the imposed conditions. Arundo had higher growth rates and biomass than Sarcocornia and may therefore be the preferred species for use in CWs treating tannery wastewater. CWs planted with the above mentioned plants significantly decreased the toxicity of the wastewater, as effluent from the CWs outlet stimulated the growth of Trifolium at concentrations <50%, and seed germination and growth even occurred in undiluted effluent.
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Affiliation(s)
- Cristina S C Calheiros
- CBQF/Escola Superior de Biotecnologia, Universidade Católica Portuguesa, Rua Dr António Bernardino de Almeida, Porto, Portugal
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Chen HJ, Lin YZ, Fanjiang JM, Fan C. Microbial community and treatment ability investigation in AOAO process for the optoelectronic wastewater treatment using PCR-DGGE biotechnology. Biodegradation 2012; 24:227-43. [DOI: 10.1007/s10532-012-9579-0] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2012] [Accepted: 07/19/2012] [Indexed: 11/30/2022]
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