1
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Wang R, Lou J, Cai J. Strategies to attenuate ciprofloxacin inhibition on enhanced biological phosphorus removal from wastewater and its recoverability. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2024; 354:120456. [PMID: 38412731 DOI: 10.1016/j.jenvman.2024.120456] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2023] [Revised: 01/22/2024] [Accepted: 02/20/2024] [Indexed: 02/29/2024]
Abstract
The inhibiting effects of ciprofloxacin (CIP) on enhanced biological phosphorus removal (EBPR) were investigated with no change in reactor operation and with increased aeration rate and sludge retention time (SRT) to explore inhibition-alleviating solutions. Additionally, performance recoverability was evaluated. The results showed that the phosphorus removal efficiency in the presence of 0.002-0.092 mg/L CIP for 7 days was only 12.5%. Increasing the aeration rate relieved inhibition (33.5% phosphorus removal efficiency on Day 7), and increasing SRT slowed EBPR performance deterioration. The EBPR performance recovered from CIP inhibition and increases in the aeration rate and SRT resulted in different recovery phenomena. The maximum PO43--P release rate continued to decrease in the first 2 days of the recovery stage and then gradually increased. However, the maximum PO43--P uptake rate immediately increased at different rates among reactors, which might be attributed to variations in the microbial community structure, decreased poly-P content, and enhanced abundances of ABC transporters and quorum sensing. It was found that some microorganisms associated with phosphorus removal were more tolerant to CIP than glycogen accumulating organisms. Moreover, the increased relative abundance of the qepA gene indicated that the microorganisms in the EBPR system had strong antibiotic resistance capacity. The bacterial community structure was significantly affected by CIP and could not recover to the initial structure. The results help to provide technical support for the operation of the EBPR process in the presence of CIP and to increase the understanding of system recoverability.
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Affiliation(s)
- Ruyi Wang
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou, 310012, China.
| | - Juqing Lou
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou, 310012, China.
| | - Jing Cai
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou, 310012, China.
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2
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Awad H, Mossad M, Mahanna H, Foad M, Gar Alalm M. Comparative assessment of different scenarios for upgrading activated sludge wastewater treatment plants in developing countries. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 907:168022. [PMID: 37898189 DOI: 10.1016/j.scitotenv.2023.168022] [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: 08/12/2023] [Revised: 10/02/2023] [Accepted: 10/20/2023] [Indexed: 10/30/2023]
Abstract
Improvement of current wastewater treatment plants (WWTPs) to accommodate the growing influent flow rate and cope with the increasingly stringent regulations is hindered by the allowed space and the difficulty of changing the design parameters. Mathematical modeling is a useful tool for assessing the performance of WWTPs in light of broadening objectives. We herein explore the utilization of mathematical modeling to improve effluent quality in conventional activated sludge systems. BioWin was used to model Mansoura WWTP, one of the largest WWTPs in Egypt. Lab records, design reports, and additional analyses were conducted through site visits and a comprehensive sampling campaign. The wastewater was characterized, and the plant-wide model was calibrated following the protocol of the Dutch Foundation for Applied Water Research STOWA. Important kinetic and stoichiometric parameters were identified and adjusted during the calibration process. The model validity was assessed using different validation periods considering average relative deviation (ARD) values below 20 % as acceptable. The optimized nitrification and denitrification processes involved 16 scenarios with different operational conditions. By changing some zones in the aeration basin from aerobic to anoxic and increasing the return activated sludge, the average ammonia and nitrate concentrations were significantly reduced from 23.06 and 0.5 mg/L to 4.64 and 0.07 mg/L respectively. Furthermore, phosphorus removal optimization was carried out through biological and chemical processes. Chemical phosphorus removal was 85.76 % by using a coagulant dosage of 25 mg/L, resulting in an effluent concentration of 1.04 mg P/L. Biological phosphorus removal was increased to 85.43 % by modifying the volume of anaerobic and aerobic zones with lower power consumption. Overall, this study demonstrates the effectiveness of mathematical modeling in enhancing effluent quality and reducing energy consumption to meet stringent wastewater treatment regulations.
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Affiliation(s)
- Hamdy Awad
- Public Works Engineering Department, Faculty of Engineering, Mansoura University, Mansoura 35516, Egypt; Civil Engineering Dept., Delta University for Science and Technology, International Coastal Road, Gamasa City, Egypt
| | - Mohamed Mossad
- Public Works Engineering Department, Faculty of Engineering, Mansoura University, Mansoura 35516, Egypt
| | - Hani Mahanna
- Public Works Engineering Department, Faculty of Engineering, Mansoura University, Mansoura 35516, Egypt
| | - Moharram Foad
- Public Works Engineering Department, Faculty of Engineering, Mansoura University, Mansoura 35516, Egypt
| | - Mohamed Gar Alalm
- Public Works Engineering Department, Faculty of Engineering, Mansoura University, Mansoura 35516, Egypt.
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3
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Asghar S, Chen L, He BB. Optimization of Simultaneous Nutrients and Chemical Oxygen Demand Removal from Anaerobically Digested Liquid Dairy Manure in a Two-Step Fed Sequencing Batch Reactor System Using Taguchi Method and Grey Relational Analysis. Appl Biochem Biotechnol 2024; 196:537-557. [PMID: 37155003 DOI: 10.1007/s12010-023-04562-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/26/2023] [Indexed: 05/10/2023]
Abstract
The technological development for efficient nutrient removal from liquid dairy manure is critical to a sustainable dairy industry. A nutrient removal process using a two-step fed sequencing batch reactor (SBR) system was developed in this study to achieve the applicability of simultaneous removal of phosphorus, nitrogen, and chemical oxygen demand from anaerobically digested liquid dairy manure (ADLDM). Three operating parameters, namely anaerobic time:aerobic time (min), anaerobic DO:aerobic DO (mg L-1), and hydraulic retention time (days), were systematically investigated and optimized using the Taguchi method and grey relational analysis for maximum removal efficiencies of total phosphorus (TP), ortho-phosphate (OP), ammonia-nitrogen (NH3-N), total nitrogen (TN), and chemical oxygen demand (COD) simultaneously. The results demonstrated that the optimal mean removal efficiencies of 91.21%, 92.63%, 91.82%, 88.61%, and 90.21% were achieved for TP, OP, NH3-N, TN, and COD at operating conditions, i.e., anaerobic:aerobic time of 90:90 min, anaerobic DO:aerobic DO of 0.4:2.4 mg L-1, and HRT of 3 days. Based on analysis of variance, the percentage contributions of these operating parameters towards the mean removal efficiencies of TP and COD were ranked in the order of anaerobic DO:aerobic DO > HRT > anaerobic time:aerobic time, while HRT was the most influential parameter for the mean removal efficiencies of OP, NH3-N, and TN followed by anaerobic time:aerobic time and anaerobic DO:aerobic DO. The optimal conditions obtained in this study are beneficial to the development of pilot and full-scale systems for simultaneous biological removal of phosphorus, nitrogen, and COD from ADLDM.
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Affiliation(s)
- Sehrish Asghar
- Environmental Science Program, College of Natural Resources, University of Idaho, Moscow, ID, 83843, USA
| | - Lide Chen
- Department of Soil and Water Systems, Twin Falls Research and Extension Center, University of Idaho, 315 Falls Avenue, PO Box 1827, Twin Falls, ID, 83303-1827, USA.
| | - B Brian He
- Department of Chemical and Biological Engineering, College of Engineering, University of Idaho, 875 Perimeter Dr. MS 0904, Moscow, ID, 83844, USA
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4
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Lu X, Oehmen A, Zhao J, Duan H, Yuan Z, Ye L. Insights on biological phosphorus removal with partial nitrification in single sludge system via sidestream free ammonia and free nitrous acid dosing. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 895:165174. [PMID: 37385509 DOI: 10.1016/j.scitotenv.2023.165174] [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: 03/14/2023] [Revised: 06/10/2023] [Accepted: 06/25/2023] [Indexed: 07/01/2023]
Abstract
The sidestream sludge treatment by free ammonium (FA)/free nitrous acid (FNA) dosing was frequently demonstrated to maintain the nitrite pathway for the partial nitrification (PN) process. Nevertheless, the inhibitory effect of FA and FNA would severely influence polyphosphate accumulating organisms (PAOs), destroying the microbe-based phosphorus (P) removal. Therefore, a strategic evaluation was proposed to successfully achieve biological P removal with a partial nitrification process in a single sludge system by sidestream FA and FNA dosing. Through the long-term operation of 500 days, excellent phosphorus, ammonium and total nitrogen removal performance were achieved at 97.5 ± 2.6 %, 99.1 ± 1.0 % and 75.5 ± 0.4 %, respectively. Stable partial nitrification with a nitrite accumulation ratio (NAR) of 94.1 ± 3.4 was attained. The batch tests also reported the robust aerobic phosphorus uptake based on FA and FNA adapted sludge after exposure of FA and FNA, respectively, suggesting the FA and FNA treatment strategy could potentially offer the opportunity for the selection of PAOs, which synchronously have the tolerance to FA and FNA. Microbial community analysis suggested that Accumulibacter, Tetrasphaera, and Comamonadaceae collectively contributed to the phosphorus removal in this system. Summarily, the proposed work presents a novel and feasible strategy to integrate enhanced biological phosphorus removal (EBPR) and short-cut nitrogen cycling and bring the combined mainstream phosphorus removal and partial nitrification process closer to practical application.
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Affiliation(s)
- Xuanyu Lu
- School of Chemical Engineering, The University of Queensland, St. Lucia, QLD 4072, Australia; Australia Centre for Water and Environmental Biotechnology, The University of Queensland, St. Lucia, Brisbane, QLD 4072, Australia
| | - Adrian Oehmen
- School of Chemical Engineering, The University of Queensland, St. Lucia, QLD 4072, Australia
| | - Jing Zhao
- Sustainable minerals institute, the university of Queensland, St. Lucia, QLD 4072, Australia
| | - Haoran Duan
- School of Chemical Engineering, The University of Queensland, St. Lucia, QLD 4072, Australia; Australia Centre for Water and Environmental Biotechnology, The University of Queensland, St. Lucia, Brisbane, QLD 4072, Australia
| | - Zhiguo Yuan
- Australia Centre for Water and Environmental Biotechnology, The University of Queensland, St. Lucia, Brisbane, QLD 4072, Australia
| | - Liu Ye
- School of Chemical Engineering, The University of Queensland, St. Lucia, QLD 4072, Australia.
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5
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Nguyen P, Marques R, Wang H, Reis MA, Carvalho G, Oehmen A. The impact of pH on the anaerobic and aerobic metabolism of Tetrasphaera-enriched polyphosphate accumulating organisms. WATER RESEARCH X 2023; 19:100177. [PMID: 37008369 PMCID: PMC10063378 DOI: 10.1016/j.wroa.2023.100177] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/04/2023] [Revised: 03/05/2023] [Accepted: 03/19/2023] [Indexed: 06/19/2023]
Abstract
Members of the genus Tetrasphaera are putative polyphosphate accumulating organisms (PAOs) that have been found in greater abundance than Accumulibacter in many full-scale enhanced biological phosphorus removal (EBPR) wastewater treatment plants worldwide. Nevertheless, previous studies on the effect of environmental conditions, such as pH, on the performance of EBPR have focused mainly on the response of Accumulibacter to pH changes. This study examines the impact of pH on a Tetrasphaera PAO enriched culture, over a pH range from 6.0 to 8.0 under both anaerobic and aerobic conditions, to assess its impact on the stoichiometry and kinetics of Tetrasphaera metabolism. It was discovered that the rates of phosphorus (P) uptake and P release increased with an increase of pH within the tested range, while PHA production, glycogen consumption and substrate uptake rate were less sensitive to pH changes. The results suggest that Tetrasphaera PAOs display kinetic advantages at high pH levels, which is consistent with what has been observed previously for Accumulibacter PAOs. The results of this study show that pH has a substantial impact on the P release and uptake kinetics of PAOs, where the P release rate was >3 times higher and the P uptake rate was >2 times higher at pH 8.0 vs pH 6.0, respectively. Process operational strategies promoting both Tetrasphaera and Accumulibacter activity at high pH do not conflict with each other, but lead to a potentially synergistic impact that can benefit EBPR performance.
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Affiliation(s)
- P.Y. Nguyen
- UCIBIO, REQUIMTE, Department of Chemistry, Faculdade de Ciencias e Tecnologia, Universidade Nova de Lisboa, Caparica 2829-516, Portugal
| | - Ricardo Marques
- UCIBIO, REQUIMTE, Department of Chemistry, Faculdade de Ciencias e Tecnologia, Universidade Nova de Lisboa, Caparica 2829-516, Portugal
| | - Hongmin Wang
- School of Chemical Engineering, The University of Queensland, St Lucia, QLD 4072, Australia
| | - Maria A.M. Reis
- UCIBIO, REQUIMTE, Department of Chemistry, Faculdade de Ciencias e Tecnologia, Universidade Nova de Lisboa, Caparica 2829-516, Portugal
| | - Gilda Carvalho
- UCIBIO, REQUIMTE, Department of Chemistry, Faculdade de Ciencias e Tecnologia, Universidade Nova de Lisboa, Caparica 2829-516, Portugal
- School of Chemical Engineering, The University of Queensland, St Lucia, QLD 4072, Australia
- Australian Centre for Water and Environmental Biotechnology (formerly AWMC), The University of Queensland, St Lucia, QLD 4072, Australia
| | - Adrian Oehmen
- UCIBIO, REQUIMTE, Department of Chemistry, Faculdade de Ciencias e Tecnologia, Universidade Nova de Lisboa, Caparica 2829-516, Portugal
- School of Chemical Engineering, The University of Queensland, St Lucia, QLD 4072, Australia
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6
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Zheng K, Wang Y, Wang X, Zhu T, Chen X, Zhao Y, Sun P, Tong Y, Liu Y. Enhanced methane production from anaerobic digestion of waste activated sludge by combining ultrasound with potassium permanganate pretreatment. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 857:159331. [PMID: 36220480 DOI: 10.1016/j.scitotenv.2022.159331] [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: 08/11/2022] [Revised: 09/19/2022] [Accepted: 10/05/2022] [Indexed: 06/16/2023]
Abstract
The influence of ultrasound (US) and potassium permanganate (KMnO4) co-pretreatment on anaerobic digestion of waste activated sludge (WAS) was investigated in this survey. Results showed that KMnO4 (0.3 g/g TSS) cooperated with US (1 W/mL, 15 min) pretreatment significantly increased the cumulative methane yield to 174.44 ± 3.65 mL/g VS compared to the control group (108.72 ± 2.56 mL/g VS), solo US (125.39 ± 2.56 mL/g VS), and solo KMnO4 pretreatment group (160.83 ± 1.61 mL/g VS). Mechanistic investigation revealed that US combined with KMnO4 pretreatment effectively disrupted the structure of extracellular polymeric substances and cell walls by generating reactive radicals, accelerating the release of organics and hydrolytic enzymes as well as improving the biodegradability of soluble organics. Modeling analysis illustrated that the biochemical methane potential and hydrolysis rate of WAS were enhanced under US + KMnO4 pretreatment. Microbial community distribution indicated that the co-pretreatment of US and KMnO4 elevated the total relative abundance of functional microorganisms associated with anaerobic digestion (22.01 %) compared to the control (10.69 %), US alone (12.24 %) and KMnO4 alone (16.20 %).
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Affiliation(s)
- Kaixin Zheng
- School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China
| | - Yufen Wang
- School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China
| | - Xiaomin Wang
- School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China
| | - Tingting Zhu
- School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China
| | - Xueming Chen
- Fujian Provincial Engineering Research Center of Rural Waste Recycling Technology, College of Environment and Safety Engineering, Fuzhou University, Fujian 350116, China
| | - Yingxin Zhao
- School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China
| | - Peizhe Sun
- School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China
| | - Yindong Tong
- School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China
| | - Yiwen Liu
- School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China.
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7
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Zheng Y, Wan Y, Zhang Y, Huang J, Yang Y, Tsang DCW, Wang H, Chen H, Gao B. Recovery of phosphorus from wastewater: A review based on current phosphorous removal technologies. CRITICAL REVIEWS IN ENVIRONMENTAL SCIENCE AND TECHNOLOGY 2022; 53:1148-1172. [PMID: 37090929 PMCID: PMC10116781 DOI: 10.1080/10643389.2022.2128194] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Phosphorus (P) as an essential nutrient for life sustains the productivity of food systems; yet misdirected P often accumulates in wastewater and triggers water eutrophication if not properly treated. Although technologies have been developed to remove P, little attention has been paid to the recovery of P from wastewater. This work provides a comprehensive review of the state-of-the-art P removal technologies in the science of wastewater treatment. Our analyses focus on the mechanisms, removal efficiencies, and recovery potential of four typical water and wastewater treatment processes including precipitation, biological treatment, membrane separation, and adsorption. The design principles, feasibility, operation parameters, and pros & cons of these technologies are analyzed and compared. Perspectives and future research of P removal and recovery are also proposed in the context of paradigm shift to sustainable water treatment technology.
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Affiliation(s)
- Yulin Zheng
- Department of Agricultural and Biological Engineering, University of Florida, Gainesville, Florida, USA
| | - Yongshan Wan
- National Health and Environmental Effects Research Laboratory, US EPA, Gulf Breeze, Florida, USA
| | - Yue Zhang
- Department of Agricultural and Biological Engineering, University of Florida, Gainesville, Florida, USA
| | - Jinsheng Huang
- Department of Agricultural and Biological Engineering, University of Florida, Gainesville, Florida, USA
| | - Yicheng Yang
- Department of Agricultural and Biological Engineering, University of Florida, Gainesville, Florida, USA
| | - Daniel C W Tsang
- Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Kowloon, Hong Kong
| | - Hailong Wang
- School of Environmental and Chemical Engineering, Foshan University, Foshan, China
| | - Hao Chen
- Department of Agriculture, University of Arkansas at Pine Bluff, Pine Bluff, Arkansas, USA
| | - Bin Gao
- Department of Agricultural and Biological Engineering, University of Florida, Gainesville, Florida, USA
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8
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Zahed MA, Salehi S, Tabari Y, Farraji H, Ataei-Kachooei S, Zinatizadeh AA, Kamali N, Mahjouri M. Phosphorus removal and recovery: state of the science and challenges. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:58561-58589. [PMID: 35780273 DOI: 10.1007/s11356-022-21637-5] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2021] [Accepted: 06/20/2022] [Indexed: 06/15/2023]
Abstract
Phosphorus is one of the main nutrients required for all life. Phosphorus as phosphate form plays an important role in different cellular processes. Entrance of phosphorus in the environment leads to serious ecological problems including water quality problems and soil pollution. Furthermore, it may cause eutrophication as well as harmful algae blooms (HABs) in aquatic environments. Several physical, chemical, and biological methods have been presented for phosphorus removal and recovery. In this review, there is an overview of phosphorus role in nature provided, available removal processes are discussed, and each of them is explained in detail. Chemical precipitation, ion exchange, membrane separation, and adsorption can be listed as the most used methods. Identifying advantages of these technologies will allow the performance of phosphorus removal systems to be updated, optimized, evaluate the treatment cost and benefits, and support select directions for further action. Two main applications of biochar and nanoscale materials are recommended.
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Affiliation(s)
| | - Samira Salehi
- Department of Health, Safety and Environment, Petropars Company, Tehran, Iran.
| | - Yasaman Tabari
- Faculty of Sciences and Advanced Technologies, Science and Culture University, Tehran, Iran
| | - Hossein Farraji
- School of Physical and Chemical Sciences, University of Canterbury, Christchurch, New Zealand
| | | | - Ali Akbar Zinatizadeh
- Faculty of Chemistry, Department of Applied Chemistry, Environmental Research Center (ERC), Razi University, Kermanshah, 67144-14971, Iran
- Department of Environmental Sciences, College of Agriculture and Environmental Sciences, University of South Africa, P.O. Box 392, Florida, 1710, South Africa
| | - Nima Kamali
- Faculty of Civil and Environmental Engineering, Tarbiat Modares University, Tehran, Iran
| | - Mohammad Mahjouri
- Department of Environmental Engineering, University of Tehran, Kish International Campus, Tehran, Iran
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9
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Wu T, Dong W, Zhang Q, Huang Y, Yang J, Cai X, Chen J, Li X. 金属氧化物对磷酸盐吸附的预测及分子机制. CHINESE SCIENCE BULLETIN-CHINESE 2022. [DOI: 10.1360/tb-2022-0367] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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10
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Huang H, Dong L, Wu Y, Zhou S, Zheng X, Chen Y. Long-term exposure to zinc oxide nanoparticles improves PAOs function in enhanced biological phosphorus removal. ENVIRONMENTAL TECHNOLOGY 2022:1-9. [PMID: 35084292 DOI: 10.1080/09593330.2022.2034982] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2021] [Accepted: 01/15/2022] [Indexed: 06/14/2023]
Abstract
As the most widely applied process for biological phosphorus removal, enhanced biological phosphorus removal (EBPR) relies on phosphorus accumulating organisms (PAOs) and glycogen accumulating organisms (GAOs), whose function is crucial for the removal of phosphorus. In this study, the effect of zinc oxide nanoparticles (ZnO NPs, 0-50 mg/L) on EBPR performance was investigated in both long-term reactors and batch experiments. It was found that the performance of biological phosphorus removal was recovered from 0% (day 0) to >99% (day 70) after long-term exposure of ZnO NPs (50 mg/L). Further studies revealed that ZnO NPs treatment caused no significant effects on the morphology and settleability of activated sludge, but enhanced the release and uptake of phosphorus as well as the transformations of polyhydroxyalkanoates and glycogen in activated sludge, which suggested that PAOs were re-activated during long-term exposure to ZnO NPs. Fluorescence in-situ hybridization (FISH) analysis showed that the relative abundance of PAOs was increased after long-term exposure. Meanwhile, the enzymatic activities of PPX and PPK were also enhanced. These results indicated that compared with short-term exposure, long-term exposure to ZnO NPs favours PAOs function and thus led to the recovery of biological phosphorus removal.
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Affiliation(s)
- Haining Huang
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, Shanghai, People's Republic of China
- Shanghai Municipal Engn Design Inst Grp Co LTD, Shanghai, People's Republic of China
| | - Lei Dong
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, Shanghai, People's Republic of China
- Shanghai Municipal Engn Design Inst Grp Co LTD, Shanghai, People's Republic of China
| | - Yang Wu
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, Shanghai, People's Republic of China
- Shanghai Municipal Engn Design Inst Grp Co LTD, Shanghai, People's Republic of China
| | - Shuyang Zhou
- Zhuhai Gaolan Port Sino French Water Co. Ltd, Zhuhai, People's Republic of China
| | - Xiong Zheng
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, Shanghai, People's Republic of China
- Shanghai Municipal Engn Design Inst Grp Co LTD, Shanghai, People's Republic of China
| | - Yinguang Chen
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, Shanghai, People's Republic of China
- Shanghai Municipal Engn Design Inst Grp Co LTD, Shanghai, People's Republic of China
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11
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Izadi P, Izadi P, Eldyasti A. Enhancement of simultaneous nitrogen and phosphorus removal using intermittent aeration mechanism. J Environ Sci (China) 2021; 109:1-14. [PMID: 34607658 DOI: 10.1016/j.jes.2021.02.026] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2020] [Revised: 02/23/2021] [Accepted: 02/23/2021] [Indexed: 06/13/2023]
Abstract
Biological nutrient removal grows into complicated scenario due to the microbial consortium shift and kinetic competition between phosphorus (P)-accumulating and nitrogen (N)-removing microorganisms. In this study, three sequential batch reactors with constant operational conditions except aeration patterns at 6 h cycle periods were tested. Intermittent aeration was applied to develop a robust nutrient removal system aimed to achieve high energy saving and removal efficiency. The results showed higher correspondence of P-uptake, polymeric substance synthesis and glycogen degradation in intermittent-aeration with longer interval periods compared to continuous-aeration. Increasing the intermittent-aeration duration from 25 to 50 min, resulted in higher process performance where the system exhibited approximately 30% higher nutrient removal. This study indicated that nutrient removal strongly depends on reaction phase configuration representing the importance of aeration pattern. The microbial community examined the variation in abundance of bacterial groups in suspended sludge, where the 50 min intermittent aeration, favored the growth of P-accumulating organisms and nitrogen removal microbial groups, indicating the complications related to nutrient removal systems. Successful intermittently aerated process with high capability of simple implementation to conventional systems by elemental retrofitting, is applicable for upgrading wastewater treatment plants. With aeration as a major operational cost, this process is a promising approach to potentially remove nutrients in high competence, in distinction to optimizing cost-efficacy of the system.
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Affiliation(s)
- Parnian Izadi
- Civil engineering, York university, 4700 Keele St, Toronto, ON, Canada
| | - Parin Izadi
- Civil engineering, York university, 4700 Keele St, Toronto, ON, Canada
| | - Ahmed Eldyasti
- Civil engineering, York university, 4700 Keele St, Toronto, ON, Canada.
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12
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Tavares Ferreira TJ, Luiz de Sousa Rollemberg S, Nascimento de Barros A, Machado de Lima JP, Bezerra Dos Santos A. Integrated review of resource recovery on aerobic granular sludge systems: Possibilities and challenges for the application of the biorefinery concept. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2021; 291:112718. [PMID: 33962280 DOI: 10.1016/j.jenvman.2021.112718] [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: 11/25/2020] [Revised: 04/15/2021] [Accepted: 04/25/2021] [Indexed: 06/12/2023]
Abstract
Aerobic Granular Sludge (AGS) is a biological treatment technology that has been extensively studied in the last decade. The possibility of resource recovery has always been highlighted in these systems, but real-scale applications are still scarce. Therefore, this paper aimed to present a systematic review of resources recovery such as water, energy, chemicals, raw materials, and nutrients from AGS systems, also analyzing aspects of engineering and economic viability. In the solid phase, sludge application in agriculture is an interesting possibility. However, the biosolids' metal concentration (the granules have high adsorption capacity due to the high concentration of extracellular polymeric substances, EPS) may be an issue. Another possibility is the recovery of Polyhydroxyalkanoates (PHAs) and Alginate-like exopolymers (bio-ALE) in the solid phase, emphasizing the last one, which has already been made in some Wastewater Treatment Plants (WWTPs), named and patented as Kaumera® process. The Operational Expenditure (OPEX) can be reduced by 50% in the WWTP when recovery of ALE is made. The ALE recovery reduced sludge yield by up to 35%, less CO2 emissions, and energy saving. Finally, the discharged sludge can also be evaluated to be used for energetic purposes via anaerobic digestion (AD) or combustion. However, the AD route has faced difficulties due to the low biodegradability of aerobic granules.
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Affiliation(s)
| | | | - Amanda Nascimento de Barros
- Department of Hydraulic and Environmental Engineering, Federal University of Ceará, Fortaleza, Ceará, Brazil
| | - João Pedro Machado de Lima
- Department of Hydraulic and Environmental Engineering, Federal University of Ceará, Fortaleza, Ceará, Brazil
| | - André Bezerra Dos Santos
- Department of Hydraulic and Environmental Engineering, Federal University of Ceará, Fortaleza, Ceará, Brazil.
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13
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Amorim de Carvalho CD, Ferreira Dos Santos A, Tavares Ferreira TJ, Sousa Aguiar Lira VN, Mendes Barros AR, Bezerra Dos Santos A. Resource recovery in aerobic granular sludge systems: is it feasible or still a long way to go? CHEMOSPHERE 2021; 274:129881. [PMID: 33582539 DOI: 10.1016/j.chemosphere.2021.129881] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2020] [Revised: 01/26/2021] [Accepted: 02/02/2021] [Indexed: 06/12/2023]
Abstract
Lately, wastewater treatment plants are much often being designed as wastewater-resource factories inserted in circular cities. Among biological treatment technologies, aerobic granular sludge (AGS), considered an evolution of activated sludge (AS), has received great attention regarding its resource recovery potential. This review presents the state-of-the-art concerning the influence of operational parameters on the recovery of alginate-like exopolysaccharides (ALE), tryptophan, phosphorus, and polyhydroxyalkanoates (PHA) from AGS systems. The carbon to nitrogen ratio was identified as a parameter that plays an important role for the optimal production of ALE, tryptophan, and PHA. The sludge retention time effect is more pronounced for the production of ALE and tryptophan. Additionally, salinity levels in the bioreactors can potentially be manipulated to increase ALE and phosphorus yields simultaneously. Some existing knowledge gaps in the scientific literature concerning the recovery of these resources from AGS were also identified. Regarding industrial applications, tryptophan has the longest way to go. On the other hand, ALE production/recovery could be considered the most mature process if we take into account that existing alternatives for phosphorus and PHA production/recovery are optimized for activated sludge rather than granular sludge. Consequently, to maintain the same effectiveness, these processes likely could not be applied to AGS without undergoing some modification. Therefore, investigating to what extent these adaptations are necessary and designing alternatives is essential.
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Affiliation(s)
- Clara de Amorim de Carvalho
- Department of Hydraulic and Environmental Engineering, Federal University of Ceará, Fortaleza, Ceará, Brazil
| | - Amanda Ferreira Dos Santos
- Department of Hydraulic and Environmental Engineering, Federal University of Ceará, Fortaleza, Ceará, Brazil
| | | | | | | | - André Bezerra Dos Santos
- Department of Hydraulic and Environmental Engineering, Federal University of Ceará, Fortaleza, Ceará, Brazil.
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14
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Izadi P, Izadi P, Eldyasti A. A review of biochemical diversity and metabolic modeling of EBPR process under specific environmental conditions and carbon source availability. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2021; 288:112362. [PMID: 33831633 DOI: 10.1016/j.jenvman.2021.112362] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2020] [Revised: 02/25/2021] [Accepted: 03/09/2021] [Indexed: 05/25/2023]
Abstract
Enhanced biological phosphorus removal (EBPR) is one of the most promising technologies as an economical and environmentally sustainable technique for removal of phosphorus from wastewater (WW). However, with high capacity of EBPR, insufficient P-removal is a major yet common issue of many full-scale wastewater treatment plants (WWTP), due to misinterpreted environmental and microbial disturbance. By developing a rather extensive understanding on biochemical pathways and metabolic models governing the anaerobic and aerobic/anoxic processes; the optimal operational conditions, environmental changes and microbial population interaction are efficiently predicted. Therefore, this paper critically reviews the current knowledge on biochemical pathways and metabolic models of phosphorus accumulating organisms (PAOs) and glycogen accumulating organisms (GAOs) as the most abundant microbial populations in EBPR process with an insight on the effect of available carbon source types in WW on phosphorus removal performance. Moreover, this paper critically assesses the gaps and potential future research in metabolic modeling area. With all the developments on EBPR process in the past few decades, there is still lack of knowledge in this critical sector. This paper hopes to touch on this problem by gathering the existing knowledge and to provide farther insights on the future work onto chemical transformations and metabolic strategies in different conditions to benefit the quantitative model as well as WWTP designs.
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Affiliation(s)
- Parnian Izadi
- Civil engineering, York university, 4700 Keele St, Toronto, M3J 1P3, ON, Canada.
| | - Parin Izadi
- Civil engineering, York university, 4700 Keele St, Toronto, M3J 1P3, ON, Canada.
| | - Ahmed Eldyasti
- Civil engineering, York university, 4700 Keele St, Toronto, M3J 1P3, ON, Canada.
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Nur Atikah Abdul Salim, Fulazzaky MA, Abdullah NH, Puteh MH, Khamidun MH, Yusoff ARM, Zaini MAA, Nuid M, Ahmad N, Lazim ZM. The Alternating Aerobic-Anoxic System for the Treatment of Phosphorus in Waters. J WATER CHEM TECHNO+ 2021. [DOI: 10.3103/s1063455x21020120] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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16
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Belli TJ, Bassin JP, Costa RE, Akaboci TRV, Battistelli AA, Lobo-Recio MA, Lapolli FR. Evaluating the effect of air flow rate on hybrid and conventional membrane bioreactors: Implications on performance, microbial activity and membrane fouling. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 755:142563. [PMID: 33059133 DOI: 10.1016/j.scitotenv.2020.142563] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2020] [Revised: 09/04/2020] [Accepted: 09/22/2020] [Indexed: 06/11/2023]
Abstract
This study addressed the impact of air flow rate on the performance, membrane fouling behaviour and microbial community of a sequencing batch conventional membrane bioreactor (SB-MBR) and a sequencing batch hybrid membrane bioreactor (SB-HMBR) with carrier media for biofilm growth. Two different scenarios were evaluated: high (6.4 L min-1) and low (1.6 L min-1) air flow rates, associated with high (4.5 mg L-1) and low (1.5 mg L-1) dissolved oxygen (DO) concentrations and specific aeration demand per membrane area (SADm) of 0.426 and 0.106 m3 m-2 h-1, respectively. Both reactors were subjected to alternating non-aerated and aerated conditions for organic matter (as chemical oxygen demand - COD), nitrogen and phosphate removal from a municipal wastewater. From the bacterial community analysis, the key players in nutrient removal processes were assessed. The results showed that COD removal efficiencies were above 95% in both MBRs, regardless of the aeration intensity, while complete ammonium removal was observed at the higher DO. However, nitrifying activity was adversely affected under low DO levels. High nitrification levels were re-established faster in the hybrid MBR, thanks to the presence of biofilm, where nitrifying activity was favoured and the bacterial community profile did not exhibit substantial changes upon DO reduction. A higher denitrification potential was found for the carrier-based MBR, resulting in lower effluent nitrate concentrations. Regarding phosphorus removal, a slight improvement was observed in the SB-HMBR at reduced DO, while in the SB-MBR it remained practically constant. Moreover, the specific phosphate uptake rate exhibited a significant increase, especially in the hybrid MBR, reaching 44.6 mgP gVSS-1 h-1. At lower aeration rate, however, worse filterability and higher membrane fouling rates were observed, especially in the conventional MBR. Overall, the results demonstrated that the hybrid MBR better withstood the reduced air flow rate and DO as compared to the conventional counterpart.
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Affiliation(s)
- Tiago J Belli
- Dept. of Sanitary Engineering, State University of Santa Catarina, 89140-000 Ibirama, SC, Brazil.
| | - João P Bassin
- Chemical Engineering Program - COPPE, Federal University of Rio de Janeiro, P.O. Box 68502, 21941-972 Rio de Janeiro, RJ, Brazil.
| | - Rayra E Costa
- Dept. of Sanitary and Environmental Engineering, Federal University of Santa Catarina Florianópolis, SC, Brazil
| | - Tiago R V Akaboci
- Dept. of Sanitary Engineering, State University of Santa Catarina, 89140-000 Ibirama, SC, Brazil
| | - André A Battistelli
- Dept. of Environmental Engineering, State University of Maringá, Umuarama, PR, Brazil
| | - Maria A Lobo-Recio
- Dept. of Energy and Sustainability, Federal University of Santa Catarina, Araranguá, SC 88906-072, Brazil
| | - Flávio R Lapolli
- Dept. of Sanitary and Environmental Engineering, Federal University of Santa Catarina, Florianópolis, SC, Brazil
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Matsuura N, Masakke Y, Karthikeyan S, Kanazawa S, Honda R, Yamamoto-Ikemoto R, Konstantinidis KT. Metagenomic insights into the effect of sulfate on enhanced biological phosphorus removal. Appl Microbiol Biotechnol 2021; 105:2181-2193. [PMID: 33555362 DOI: 10.1007/s00253-021-11113-4] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2020] [Revised: 12/25/2020] [Accepted: 01/12/2021] [Indexed: 11/30/2022]
Abstract
Excess phosphorus in water supplies causes eutrophication, which degrades water quality. Hence, the efficient removal of phosphorus from wastewater represents a highly desirable process. Here, we evaluated the effect of sulfate concentration on enhanced biological phosphorus removal (EBPR), in which phosphorus is typically removed under anaerobic-oxic cycles, with sulfate reduction the predominant process in the anaerobic phase. Two sequencing batch EBPR reactors operated under high- (SBR-H) vs. low-sulfate (SBR-L) concentrations for 189 days and under three periods, i.e., start-up, sufficient acetate, and limited acetate. Under acetate-rich conditions, phosphorus removal efficiency was > 90% for both reactors; however, under acetate-limited conditions, only 34% and 91.3% of the phosphorus were removed for the SBR-L and the SBR-H, respectively. Metagenomic sequencing of the reactors showed that the relative abundance of the polyphosphate-accumulating and sulfur-reducing bacteria (SRB) was higher in the SBR-H, consistent with its higher phosphorus removal activity. Ten high-quality metagenome-assembled genomes, including one closely related to the genus Thiothrix disciformis (99.81% average amino acid identity), were recovered and predicted to simultaneously metabolize phosphorus and sulfur by the presence of phosphorus (ppk, ppx, pst, and pit) and sulfur (sul, sox, dsr, sqr, apr, cys, and sat) metabolism marker genes. The omics-based analysis provided a holistic view of the microbial ecosystem in the EBPR process and revealed that SRB and Thiothrix play key roles in the presence of high sulfate.Key points• We observed high phosphorus-removal efficiency in high-sulfate EBPR.• Metagenome-based analysis revealed sulfate-related metabolic mechanisms in EBPR.• SRB and PAOs showed interrelationships in the EBPR-sulfur systems.
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Affiliation(s)
- Norihisa Matsuura
- Faculty of Geosciences and Civil Engineering, Kanazawa University, Kanazawa, Ishikawa, Japan.
| | - Yalkhin Masakke
- Graduate School of Natural Science and Technology, Kanazawa University, Kanazawa, Ishikawa, Japan
| | - Smruthi Karthikeyan
- School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, GA, USA
| | - Sui Kanazawa
- Graduate School of Natural Science and Technology, Kanazawa University, Kanazawa, Ishikawa, Japan
| | - Ryo Honda
- Faculty of Geosciences and Civil Engineering, Kanazawa University, Kanazawa, Ishikawa, Japan
| | - Ryoko Yamamoto-Ikemoto
- Faculty of Geosciences and Civil Engineering, Kanazawa University, Kanazawa, Ishikawa, Japan
| | - Konstantinos T Konstantinidis
- School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, GA, USA.,School of Biological Sciences, Georgia Institute of Technology, Atlanta, GA, USA
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18
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Understanding microbial shift of Enhanced Biological Phosphorus Removal process (EBPR) under different Dissolved Oxygen (DO) concentrations and Hydraulic Retention Time (HRTs). Biochem Eng J 2021. [DOI: 10.1016/j.bej.2020.107833] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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19
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Zhao J, Yuan Q, Sun Y, Zhang J, Zhang D, Bian R. Effect of fluoxetine on enhanced biological phosphorus removal using a sequencing batch reactor. BIORESOURCE TECHNOLOGY 2021; 320:124396. [PMID: 33212384 DOI: 10.1016/j.biortech.2020.124396] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Revised: 10/31/2020] [Accepted: 11/06/2020] [Indexed: 06/11/2023]
Abstract
In this work, the potential impact of emerging pollutant Fluoxetine (FLX) on enhanced biological phosphorus removal (EBPR) was systematically investigated using the sequencing batch reactor. The experimental results showed that even 200 μg/L FLX had no significant effect on EBPR during the short-term exposure. However, in the long-term exposure test, high dosage of FLX inhibited EBPR. 200 μg/L FLX induced biological phosphorus removal efficiency dropped to 71.3 ± 2.1%, significantly lower than that of the blank. The mechanism investigation showed that high concentration of FLX reduced anaerobic phosphorus release and oxic phosphorus absorption, and the consumption of organic matter during the anaerobic period. In addition, FLX decreased the synthesis of intracellular polymer polyhydroxyalkanoates (PHA), but promoted the metabolism of glycogen and polyhydroxyvalerate. FLX reduced the activity of key enzymes in EBPR and the relative abundance of Accumulibacter, but improved the relative abundance of Candidatus Competibacter.
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Affiliation(s)
- Jianwei Zhao
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao 266033, China; Qingdao Solid Waste Pollution Control and Resource Engineering Research Center, Qingdao 266033, China.
| | - Qingjiang Yuan
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao 266033, China; Qingdao Solid Waste Pollution Control and Resource Engineering Research Center, Qingdao 266033, China
| | - Yingjie Sun
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao 266033, China; Qingdao Solid Waste Pollution Control and Resource Engineering Research Center, Qingdao 266033, China
| | - Jing Zhang
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao 266033, China; Qingdao Solid Waste Pollution Control and Resource Engineering Research Center, Qingdao 266033, China
| | - Dalei Zhang
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao 266033, China; Qingdao Solid Waste Pollution Control and Resource Engineering Research Center, Qingdao 266033, China
| | - Rongxing Bian
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao 266033, China; Qingdao Solid Waste Pollution Control and Resource Engineering Research Center, Qingdao 266033, China
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20
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Wang R, Lou J, Fang J, Cai J, Hu Z, Sun P. Effects of heavy metals and metal (oxide) nanoparticles on enhanced biological phosphorus removal. REV CHEM ENG 2020. [DOI: 10.1515/revce-2018-0076] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
AbstractWith the rapid growth of economics and nanotechnology, a significant portion of the anthropogenic emissions of heavy metals and nanoparticles (NPs) enters wastewater streams and discharges to wastewater treatment plants, thereby potentially posing a risk to the bacteria that facilitate the successful operation of the enhanced biological phosphorus (P) removal (EBPR) process. Although some efforts have been made to obtain detailed insights into the effects of heavy metals and metal (oxide) nanoparticles [Me(O)NPs], many unanswered questions remain. One question is whether the toxicity of Me(O)NPs originates from the released metal ions. This review aims to holistically evaluate the effects of heavy metals and Me(O)NPs. The interactions among extracellular polymeric substances, P, and heavy metals [Me(O)NPs] are presented and discussed for the first time. The potential mechanisms of the toxicity of heavy metals [Me(O)NPs] are summarized. Additionally, mathematical models of the toxicity and removal of P, heavy metals, and Me(O)NPs are overviewed. Finally, knowledge gaps and opportunities for further study are discussed to pave the way for fully understanding the inhibition of heavy metals [Me(O)NPs] and for reducing their inhibitory effect to maximize the reliability of the EBPR process.
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Affiliation(s)
- Ruyi Wang
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310012, China
| | - Juqing Lou
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310012, China
| | - Jing Fang
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310012, China
| | - Jing Cai
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310012, China
| | - Zhirong Hu
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310012, China
- GL Environment Inc., Hamilton, Canada
| | - Peide Sun
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310012, China
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21
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Using Microbial Aggregates to Entrap Aqueous Phosphorus. Trends Biotechnol 2020; 38:1292-1303. [DOI: 10.1016/j.tibtech.2020.03.012] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2020] [Revised: 03/23/2020] [Accepted: 03/24/2020] [Indexed: 02/06/2023]
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22
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Shan S, Wang W, Liu D, Zhao Z, Shi W, Cui F. Remarkable phosphate removal and recovery from wastewater by magnetically recyclable La 2O 2CO 3/γ-Fe 2O 3 nanocomposites. JOURNAL OF HAZARDOUS MATERIALS 2020; 397:122597. [PMID: 32416378 DOI: 10.1016/j.jhazmat.2020.122597] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2020] [Revised: 03/07/2020] [Accepted: 03/25/2020] [Indexed: 06/11/2023]
Abstract
Owing to the twin problems of eutrophication and global phosphorus (P) scarcity, the removal and recovery of phosphate from water and wastewater have received increasing attention. Herein, magnetically recyclable La2O2CO3/γ-Fe2O3 adsorbents were rationally designed by derivation from La/Fe binary metal organic framework (MOF) precursors via calcination treatment. Based upon preliminary screening of as-prepared La2O2CO3/γ-Fe2O3 nanocomposites with different La-to-Fe molar ratios in terms of phosphate sorption capacity and magnetic property as well as La content, La2O2CO3/γ-Fe2O3 nanocomposite with a La-to-Fe molar ratio of 2:1 was selected for further characterization and adsorption performance evaluation. Batch adsorption experiments showed that La2O2CO3/γ-Fe2O3 (2:1) adsorbent exhibited a remarkable phosphate sorption capacity of 134.82 mg P/g, a fast sorption kinetic, strong selectivity for phosphate in the presence of co-existing anions, and a wide applicable pH range of 3-9. Furthermore, La2O2CO3/γ-Fe2O3 (2:1) sorbent displayed an excellent sorption performance for low-concentration wastewater, a low dosage of 0.1 g/L was sufficiently enough for reducing P-concentration from 0.5 mg P/L to below 10 μg P/L within 20 min. In a real sewage of 2.68 mg P/L, 0.2 g/L of sorbent could reduce the concentration of phosphate to <0.01 mg P/L within 50 min. Moreover, over 83.1 % of original sorption capacity could be retained after 5 consecutive regeneration cycles, showing great regenerative performance of the adsorbent. These development is expected to be meaningful for practical water purification.
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Affiliation(s)
- Sujie Shan
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Wei Wang
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China.
| | - Dongmei Liu
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Zhiwei Zhao
- College of Urban Construction and Environmental Engineering, Chongqing University, Chongqing 400045, China
| | - Wenxin Shi
- College of Urban Construction and Environmental Engineering, Chongqing University, Chongqing 400045, China.
| | - Fuyi Cui
- College of Urban Construction and Environmental Engineering, Chongqing University, Chongqing 400045, China
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23
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Sowndarya S, Kanmani S, Raj SA. Treatment of high-strength sewage by textile fibers-based sequencing batch biofilm reactor for simultaneous removal of organics and nutrients. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART A, TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING 2020; 55:1548-1562. [PMID: 32990175 DOI: 10.1080/10934529.2020.1826239] [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: 05/27/2020] [Revised: 08/19/2020] [Accepted: 08/20/2020] [Indexed: 06/11/2023]
Abstract
This study investigates the effectiveness of SBBR with low-cost textile fibers-based bio-carrier namely polypropylene fibers for the treatment of real sewage. The influent loading rates of COD, TN, and TP were averaged at 0.2780, 0.0170, and 0.0077 kg/m3.d, respectively. The removal efficiencies of BOD, COD, TN, and TP recorded in SBBR were 98%, 93%, 82%, and 44%, respectively at an aeration time of 4 h. The TN and TP removal achieved in SBBR were 2.05 and 2.75 times, respectively higher than SBR. The COD removal efficiency was more than 90% under all SRT conditions (10, 14, 18, 22, and 26 d) in SBBR, and the highest efficiency of 93% was obtained at an SRT of 22 days. As the SRT increased, the nitrogen and phosphorus removal decreased, because the denitrification rate and phosphorus release and uptake rate decreased at longer SRT. Simultaneous nitrification and denitrification (SND) efficiency was 85% in SBBR and 44% in SBR, indicating the co-existence of aerobic nitrifiers and anoxic denitrifiers in the biofilm reactor. In SBBR, the nitrogen mass balance showed 74% of nitrogen removed by denitrification, 9% was removed through sludge wasting process, and 13% was removed in effluent at an SRT of 22 days and DO concentration of 3 mg/L. The t-test results suggest that the performance of SBBR was better than SBR in nitrogen and phosphorus removal at a 95% confidence interval.
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Affiliation(s)
- S Sowndarya
- Research scholar, Centre for Environmental Studies, College of Engineering Guindy, Anna University, Chennai, Tamil Nadu, India
| | - S Kanmani
- Centre for Environmental Studies, College of Engineering Guindy, Anna University, Chennai, Tamil Nadu, India
| | - S Amal Raj
- Centre for Environmental Studies, College of Engineering Guindy, Anna University, Chennai, Tamil Nadu, India
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Liu F, Moustafa H, El-Din Hassouna MS, He Z. Resource recovery from wastewater can be an application niche of microbial desalination cells. ENVIRONMENT INTERNATIONAL 2020; 142:105855. [PMID: 32559559 DOI: 10.1016/j.envint.2020.105855] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2020] [Revised: 05/31/2020] [Accepted: 06/01/2020] [Indexed: 06/11/2023]
Abstract
Microbial desalination cells (MDCs) have been studied as an emerging technology to accomplish simultaneous wastewater treatment and saline water desalination. A good amount of effort has been invested to understand fundamental problems and develop functional systems of the MDC technology. However, a revisit of MDCs' desalination function reveals that the unique requirements like co-location of wastewater and saline water will greatly limit the application of this technology. In addition, the relatively low desalination rate of MDCs will result in a large reactor size and thus higher capital cost. Because of the need for wastewater (as a substrate for electricity generation), the MDC technology may have a promising niche of application for resource recovery from wastewater. A proper design of MDCs will allow the current-driven separation of ammonia, phosphorus, and volatile fatty acids (VFAs) from wastewater for further recovery. Based on the literature data, we conduct a case study analysis of mass flow for MDC-based resource recovery and demonstrate the potential of this function. Resource recovery can be a new function of interest to MDCs and worth further exploration of its technical and economic feasibility.
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Affiliation(s)
- Fubin Liu
- Department of Energy, Environmental and Chemical Engineering, Washington University in St. Louis, St. Louis, MO 63130, USA
| | - Hanan Moustafa
- Department of Energy, Environmental and Chemical Engineering, Washington University in St. Louis, St. Louis, MO 63130, USA; Institute of Graduate Studies and Research, Alexandria University, Alexandria 21526, Egypt
| | | | - Zhen He
- Department of Energy, Environmental and Chemical Engineering, Washington University in St. Louis, St. Louis, MO 63130, USA.
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26
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Letshwenyo MW, Sima TV. Phosphorus removal from secondary wastewater effluent using copper smelter slag. Heliyon 2020; 6:e04134. [PMID: 32577557 PMCID: PMC7303565 DOI: 10.1016/j.heliyon.2020.e04134] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2020] [Revised: 05/16/2020] [Accepted: 06/01/2020] [Indexed: 11/29/2022] Open
Abstract
This study investigated the use of copper smelter slag for the removal of phosphorus from secondary wastewater effluent through batch tests. The media was physically and chemically characterized and showed presence of Fe2O3 (45.22%), SiO2 (14.98%), Al2O3 (3.21%), CaO (1.99%), SO3 (1.77%) and MgO (1.33%). Scanning electron microscopy monographs revealed smooth and flat surface and no heterogeneity on the surface of the slag with visible micro pores before the experiment and less visible after the experiment. The point of zero charge of the media was 5.0. Equilibrium was reached after 4 h at 29.5 ± 0.71% phosphorus removal efficiency and media dosage of 0.4/100 mL. The kinetic data was best described by Pseudo second order equation. More than one mechanisms were involved in the adsorption of phosphorus onto copper smelter slag as suggested by multi-linearity of intra particle diffusion model. Ninety seven percent (97.5 ± 0.0%) removal efficiency was achieved at an equilibrium dosage of 160 gL-1. The equilibrium isotherm was described better by Langmuir equation with observed maximum adsorption capacity of 0.16 mg P g-1 media and the experimental maximum adsorption capacity was 0.26 mg P g-1 media. Regeneration studies showed low performance with maximum efficiency of 11.7% revealed during the first regeneration trial therefore low practical benefits. Copper smelter slag is a poor adsorbent for phosphorus and further studies on the media should be conducted.
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Affiliation(s)
- Moatlhodi Wise Letshwenyo
- Botswana International University of Science and Technology, Faculty of Engineerimg and Technology, Department of Civil and Environmental Engineering, Private Bag 16, Palapye, Botswana
| | - Thandie Veronicah Sima
- Botswana International University of Science and Technology, Faculty of Engineerimg and Technology, Department of Civil and Environmental Engineering, Private Bag 16, Palapye, Botswana
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27
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Dorofeev AG, Nikolaev YA, Mardanov AV, Pimenov NV. Role of Phosphate-Accumulating Bacteria in Biological Phosphorus Removal from Wastewater. APPL BIOCHEM MICRO+ 2020. [DOI: 10.1134/s0003683820010056] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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28
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Bertanza G, Menoni L, Capoferri GU, Pedrazzani R. Promoting biological phosphorus removal in a full scale pre-denitrification wastewater treatment plant. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2020; 254:109803. [PMID: 31733473 DOI: 10.1016/j.jenvman.2019.109803] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2019] [Revised: 10/14/2019] [Accepted: 10/28/2019] [Indexed: 06/10/2023]
Abstract
A survey conducted in Italy revealed that less than 0.5% out of a sample of over 2,000 municipal wastewater treatment plants is equipped with an enhanced biological phosphorus removal process. Conditions promoting biological phosphorus removal have been investigated by monitoring three real plants equipped with, respectively: (A) simultaneous chemical precipitation; (B) enhanced biological removal powered by chemical precipitation; (C) tertiary chemical precipitation with evidence of phosphate accumulating bacteria. An anaerobic compartment revealed essential for the growth of these microorganisms, the readily degradable organic concentration in the influent playing a minor role. Mapping dissolved oxygen and oxidation-reduction potential in different compartments of plant (C) was carried out to understand the reasons why phosphate accumulating bacteria were found even in the absence of anaerobic reactor. Finally, the possibility to exploit the biological phosphorus removal in plant (C), by adjusting the aeration conditions, was explored and an economic analysis showed this to be a preferable approach with respect to the chemical removal of phosphorus.
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Affiliation(s)
- Giorgio Bertanza
- DICATAM - Department of Civil Engineering, Architecture, Land, Environment and Mathematics, University of Brescia, Via Branze 43, I-25123, Brescia, Italy
| | - Laura Menoni
- DICATAM - Department of Civil Engineering, Architecture, Land, Environment and Mathematics, University of Brescia, Via Branze 43, I-25123, Brescia, Italy
| | - Giacomo Umberto Capoferri
- DICATAM - Department of Civil Engineering, Architecture, Land, Environment and Mathematics, University of Brescia, Via Branze 43, I-25123, Brescia, Italy
| | - Roberta Pedrazzani
- DIMI - Department of Mechanical and Industrial Engineering, University of Brescia, Via Branze 38, I-25123, Brescia, Italy.
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Tao GJ, Long XY, Tang R, Wang JY, Fang ZD, Xie CX, Wang T, Peng XH. Comparison and optimization of extraction protocol for intracellular phosphorus and its polyphosphate in enhanced biological phosphorus removal (EBPR) sludge. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 699:134389. [PMID: 31522050 DOI: 10.1016/j.scitotenv.2019.134389] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2019] [Revised: 08/31/2019] [Accepted: 09/09/2019] [Indexed: 06/10/2023]
Abstract
Intracellular polyphosphate (poly-P) plays important roles in Enhanced biological phosphorus removal (EBPR) process, but an effective and reliable protocol for extracting intracellular P and its poly-P in EBPR sludge without hydrolysis of poly-P has not been setup yet. In the study, it was revealed that the severe hydrolysis of intracellular poly-P occurred during the different extraction processes, such as acid (i.e., HClO4, H2SO4 and HCl), basic (i.e., NaOH and KOH) and freezing-grind (under different solid-liquid ratios), but it did not occur during ultrasonic extraction process. The optimal extraction process of the ultrasonic protocol was 10 w/mL of ultrasonic power density and 15 min of ultrasonic time, when the extraction efficiency of intracellular P was 88.24 ± 1.56%. In addition, the extraction efficiency of intracellular P could be furtherly improved by that the 0.75 mol/L LiCl solution was used to resuspend the bacterial cell before ultrasonic extraction (i.e., LiCl-ultrasonic protocol). The ultrasonic protocol was more suitable to extract the intracellular P and its poly-P of EBPR sludge than the other 4 protocols (i.e., PCA-NaOH, EDTA-NaOH, freezing-grind and LiCl-ultrasonic), which had the technical characteristics of (i) with relatively high extraction efficiency of intracellular P, (ii) without hydrolysis of intracellular poly-P, (iii) with weak noise signal in 31P NMR spectrum and (iv) with simple extraction process and short extraction time. It was founded by the ultrasonic protocol that there was the high content (82.88%-89.79% of intracellular P content) of intracellular poly-P with long average chain length (376.4-383.2) in the EBPR sludges. Importantly, it was confirmed that the EBPR process was related to the combined action of extracellular and intracellular poly-P using a new fractionation method of P in EBPR sludge, which included the ultrasonic protocol at high power density for extracting the intracellular P and its poly-P.
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Affiliation(s)
- Guang-Jian Tao
- Department of Military installation, Army Logistics University of the People's Liberation Army, University Town, Shapingba District, Chongqing 401311, China
| | - Xiang-Yu Long
- Department of Military installation, Army Logistics University of the People's Liberation Army, University Town, Shapingba District, Chongqing 401311, China.
| | - Ran Tang
- College of Chemistry and Chemical Engineering, Chongqing University of Science and Technology, University Town, Shapingba District, Chongqing 401331, China
| | - Jia-Yue Wang
- Department of Military installation, Army Logistics University of the People's Liberation Army, University Town, Shapingba District, Chongqing 401311, China
| | - Zhen-Dong Fang
- Department of Military installation, Army Logistics University of the People's Liberation Army, University Town, Shapingba District, Chongqing 401311, China
| | - Chao-Xin Xie
- Department of Military installation, Army Logistics University of the People's Liberation Army, University Town, Shapingba District, Chongqing 401311, China
| | - Tao Wang
- Department of Military installation, Army Logistics University of the People's Liberation Army, University Town, Shapingba District, Chongqing 401311, China
| | - Xiao-Hong Peng
- Department of Military installation, Army Logistics University of the People's Liberation Army, University Town, Shapingba District, Chongqing 401311, China
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Wu B, Wan J, Zhang Y, Pan B, Lo IMC. Selective Phosphate Removal from Water and Wastewater using Sorption: Process Fundamentals and Removal Mechanisms. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2020; 54:50-66. [PMID: 31804806 DOI: 10.1021/acs.est.9b05569] [Citation(s) in RCA: 217] [Impact Index Per Article: 54.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Eutrophication of water bodies is a serious and widespread environmental problem. Achieving low levels of phosphate concentration to prevent eutrophication is one of the important goals of the wastewater engineering and surface water management. Meeting the increasingly stringent standards is feasible in using a phosphate-selective sorption system. This critical review discusses the most fundamental aspects of selective phosphate removal processes and highlights gains from the latest developments of phosphate-selective sorbents. Selective sorption of phosphate over other competing anions can be achieved based on their differences in acid-base properties, geometric shapes, and metal complexing abilities. Correspondingly, interaction mechanisms between the phosphate and sorbent are categorized as hydrogen bonding, shape complementarity, and inner-sphere complexation, and their representative sorbents are organic-functionalized materials, molecularly imprinted polymers, and metal-based materials, respectively. Dominating factors affecting the phosphate sorption performance of these sorbents are critically examined, along with a discussion of some overlooked facts regarding the development of high-performance sorbents for selective phosphate removal from water and wastewater.
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Affiliation(s)
- Baile Wu
- Department of Civil and Environmental Engineering, The Hong Kong University of Science and Technology, Hong Kong, China
| | - Jun Wan
- Department of Civil and Environmental Engineering, The Hong Kong University of Science and Technology, Hong Kong, China
| | - Yanyang Zhang
- Department of Civil and Environmental Engineering, The Hong Kong University of Science and Technology, Hong Kong, China
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China
| | - Bingcai Pan
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China
| | - Irene M C Lo
- Department of Civil and Environmental Engineering, The Hong Kong University of Science and Technology, Hong Kong, China
- Institute for Advanced Study, The Hong Kong University of Science and Technology, Hong Kong, China
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31
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Huang J, Xiao J, Guo Y, Guan W, Cao C, Yan C, Wang M. Long-term effects of silver nanoparticles on performance of phosphorus removal in a laboratory-scale vertical flow constructed wetland. J Environ Sci (China) 2020; 87:319-330. [PMID: 31791505 DOI: 10.1016/j.jes.2019.07.012] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2019] [Revised: 07/17/2019] [Accepted: 07/18/2019] [Indexed: 06/10/2023]
Abstract
Silver nanoparticles (AgNPs) have been widely used in many fields, which raised concerns about potential threats to biological sewage treatment systems. In this study, the phosphorus removal performance, enzymatic activity and microbial population dynamics in constructed wetlands (CWs) were evaluated under a long-term exposure to AgNPs (0, 50, and 200 μg/L) for 450 days. Results have shown that AgNPs inhibited the phosphorus removal efficiency in a short-term exposure, whereas caused no obviously negative effects from a long-term perspective. Moreover, in the coexisting CW system of AgNPs and phosphorus, competition exhibited in the initial exposure phase, however, cooperation between them was observed in later phase. Enzymatic activity of acid-phosphatase at the moderate temperature (10-20°C) was visibly higher than that at the high temperature (20-30°C) and CWs with AgNPs addition had no appreciable differences compared with the control. High-throughput sequencing results indicated that the microbial richness, diversity and composition of CWs were distinctly affected with the extension of exposure time at different AgNPs levels. However, the phosphorus removal performance of CWs did not decline with the decrease of polyphosphate accumulating organisms (PAOs), which also confirmed that adsorption precipitation was the main way of phosphorus removal in CWs. The study suggested that AgNPs and phosphorus could be removed synergistically in the coexistence system. This work has some reference for evaluating the influences of AgNPs on the phosphorus removal and the interrelation between them in CWs.
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Affiliation(s)
- Juan Huang
- School of Civil Engineering, Southeast University, Nanjing 211189, China.
| | - Jun Xiao
- School of Civil Engineering, Southeast University, Nanjing 211189, China
| | - Yang Guo
- Security Support Center for Urban Water Supply of Jiangsu Province, Nanjing 210036, China
| | - Wenzu Guan
- School of Civil Engineering, Southeast University, Nanjing 211189, China
| | - Chong Cao
- School of Civil Engineering, Southeast University, Nanjing 211189, China
| | - Chunni Yan
- School of Civil Engineering, Southeast University, Nanjing 211189, China
| | - Mingyu Wang
- School of Civil Engineering, Southeast University, Nanjing 211189, China
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Liu R, Hao X, Chen Q, Li J. Research advances of Tetrasphaera in enhanced biological phosphorus removal: A review. WATER RESEARCH 2019; 166:115003. [PMID: 31491619 DOI: 10.1016/j.watres.2019.115003] [Citation(s) in RCA: 55] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2019] [Revised: 08/16/2019] [Accepted: 08/18/2019] [Indexed: 06/10/2023]
Abstract
The processes of enhanced biological phosphorus removal (EBPR) have been widely applied in wastewater treatment plants (WWTPs). However, meeting the increasingly stringent effluent discharge standards requires a more stable EBPR performance. Under the circumstances, the identification of genus Tetrasphaera as potential phosphate accumulating organisms (PAOs) has aroused much research interests on them. In practice, a large biovolume of genus Tetrasphaera has been reliably observed in a number (up to 80) of WWTPs around the world. Tetrasphaera show a phenotype of aerobic polyphosphate (poly-P) accumulation at the condition of assimilating glucose and/or amino acids anaerobically in advance. Moreover, Tetrasphaera also present versatile physiologies, of which some show no net orthophosphate removal. While there are certainly some contradictory results and gaps in our knowledge concerning Tetrasphaera, this review summarizes the discovery, abundance in WWTPs, functions on EBPR, and biochemistry of the genus Tetrasphaera in the existing literature. It is expected to present the state-of-art progress about the genus Tetrasphaera, and to guide future R & D work.
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Affiliation(s)
- Ranbin Liu
- Sino-Dutch R&D Centre for Future Wastewater Treatment Technologies, Beijing Advanced Innovation Center for Future Urban Design, Beijing University of Civil Engineering & Architecture, Beijing, 100044, PR China
| | - Xiaodi Hao
- Sino-Dutch R&D Centre for Future Wastewater Treatment Technologies, Beijing Advanced Innovation Center for Future Urban Design, Beijing University of Civil Engineering & Architecture, Beijing, 100044, PR China.
| | - Qiao Chen
- Sino-Dutch R&D Centre for Future Wastewater Treatment Technologies, Beijing Advanced Innovation Center for Future Urban Design, Beijing University of Civil Engineering & Architecture, Beijing, 100044, PR China
| | - Ji Li
- Sino-Dutch R&D Centre for Future Wastewater Treatment Technologies, Beijing Advanced Innovation Center for Future Urban Design, Beijing University of Civil Engineering & Architecture, Beijing, 100044, PR China
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Kumar PS, Korving L, van Loosdrecht MC, Witkamp GJ. Adsorption as a technology to achieve ultra-low concentrations of phosphate: Research gaps and economic analysis. WATER RESEARCH X 2019; 4:100029. [PMID: 31334493 PMCID: PMC6614603 DOI: 10.1016/j.wroa.2019.100029] [Citation(s) in RCA: 92] [Impact Index Per Article: 18.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2018] [Revised: 03/02/2019] [Accepted: 03/27/2019] [Indexed: 05/19/2023]
Abstract
Eutrophication and the resulting formation of harmful algal blooms (HAB) causes huge economic and environmental damages. Phosphorus (P) from sewage effluent and agricultural run-off has been identified as a major cause for eutrophication. Phosphorous concentrations greater than 100 μg P/L are usually considered high enough to cause eutrophication. The strictest regulations however aim to restrict the concentration below 10 μg P/L. Orthophosphate (or phosphate) is the bioavailable form of phosphorus. Adsorption is often suggested as technology to reduce phosphate to concentrations less than 100 and even 10 μg P/L with the advantages of a low-footprint, minimal waste generation and the option to recover the phosphate. Although many studies report on phosphate adsorption, there is insufficient information regarding parameters that are necessary to evaluate its application on a large scale. This review discusses the main parameters that affect the economics of phosphate adsorption and highlights the research gaps. A scenario and sensitivity analysis shows the importance of adsorbent regeneration and reuse. The cost of phosphate adsorption using reusable porous metal oxide is in the range of $ 100 to 200/Kg P for reducing the phosphate to ultra-low concentrations. Future research needs to focus on adsorption capacity at low phosphate concentrations, regeneration and reuse of both the adsorbent and the regeneration liquid.
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Affiliation(s)
- Prashanth Suresh Kumar
- Wetsus, European Centre of Excellence for Sustainable Water Technology, Oostergoweg 9, 8911 MA, Leeuwarden, the Netherlands
- Department of Biotechnology, Applied Sciences, Delft University of Technology, Building 58, Van der Maasweg 9, 2629, HZ, Delft, the Netherlands
- Corresponding author. Department of Biotechnology, Applied Sciences, Delft University of Technology, Building 58, Van der Maasweg 9, 2629, HZ, Delft, the Netherlands.
| | - Leon Korving
- Wetsus, European Centre of Excellence for Sustainable Water Technology, Oostergoweg 9, 8911 MA, Leeuwarden, the Netherlands
| | - Mark C.M. van Loosdrecht
- Department of Biotechnology, Applied Sciences, Delft University of Technology, Building 58, Van der Maasweg 9, 2629, HZ, Delft, the Netherlands
| | - Geert-Jan Witkamp
- Department of Biotechnology, Applied Sciences, Delft University of Technology, Building 58, Van der Maasweg 9, 2629, HZ, Delft, the Netherlands
- King Abdullah University of Science and Technology (KAUST), Water Desalination and Reuse Center (WDRC), Division of Biological and Environmental Science and Engineering (BESE), Thuwal, 23955-6900, Saudi Arabia
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34
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Pishgar R, Dominic JA, Sheng Z, Tay JH. Denitrification performance and microbial versatility in response to different selection pressures. BIORESOURCE TECHNOLOGY 2019; 281:72-83. [PMID: 30798089 DOI: 10.1016/j.biortech.2019.02.061] [Citation(s) in RCA: 109] [Impact Index Per Article: 21.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/11/2018] [Revised: 02/11/2019] [Accepted: 02/12/2019] [Indexed: 06/09/2023]
Abstract
This study investigated functional dynamics of microbial community in response to different selection pressures, with a focus on denitrification. Suspended-biomass experiments demonstrated limited aerobic and relatively higher anoxic nitrate and nitrite reduction capabilities; the highest NO2-N and NO3-N removal rates were 1.3 ± 0.1 and 0.74 ± 0.01 in aerobic and 1.4 ± 0.05 and 3.4 ± 0.1 mg/L.h in anoxic media, respectively. Key potential denitrifiers were identified as: (i) complete aerobic denitrifiers: Dokdonella, Flavobacterium, and Ca. Accumulibacter; (ii) complete anoxic denitrifiers: Acinetobacter, Pseudomonas, Arcobacter, and Comamonas; (iii) incomplete nitrite denitrifier: Diaphorobacter (aerobic/anoxic), (iv): incomplete nitrate denitrifiers: Thauera (aerobic/anoxic) and Zoogloea (strictly-aerobic). Granular biomass removed 72 mg/L NH4-N with no NOx- accumulation. Heterotrophic nitrification and aerobic denitrification were proposed as the principal nitrogen removal pathway in granular reactors, potentially performed by two key organisms Thuaera and Flavobacterium. Biodiversity analysis suggested that the selection pressure of nourishment condition was the decisive factor for microbial selection and nitrogen removal mechanism.
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Affiliation(s)
- Roya Pishgar
- Department of Civil Engineering, University of Calgary, Calgary, Canada.
| | | | - Zhiya Sheng
- Department of Civil Engineering, University of Calgary, Calgary, Canada
| | - Joo Hwa Tay
- Department of Civil Engineering, University of Calgary, Calgary, Canada
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35
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Zhao J, Wang X, Li X, Jia S, Wang Q, Peng Y. Improvement of partial nitrification endogenous denitrification and phosphorus removal system: Balancing competition between phosphorus and glycogen accumulating organisms to enhance nitrogen removal without initiating phosphorus removal deterioration. BIORESOURCE TECHNOLOGY 2019; 281:382-391. [PMID: 30831518 DOI: 10.1016/j.biortech.2019.02.109] [Citation(s) in RCA: 55] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/26/2018] [Revised: 02/21/2019] [Accepted: 02/23/2019] [Indexed: 06/09/2023]
Abstract
The novel partial nitrification endogenous denitrification and phosphorus removal (PNEDPR) process can achieve deep-level nutrient removal from low carbon/nitrogen municipal wastewater without extra carbons. However, its performance is limited by long hydraulic retention time (HRT) and low specific endogenous denitrification rate (rNO2). This study aimed at investigating the effects of two improving strategies on PNEDPR. One was decreasing both anaerobic and anoxic reaction time for shortening HRT from 55 h to 17.5 h. The other was temporarily discharging orthophosphate-rich supernatant for balancing the competition between phosphorus and glycogen accumulating organisms to further raise rNO2 without deterioration of phosphorus removal. Results revealed that, desirable nutrient removal was obtained, as average effluent concentrations of total nitrogen and orthophosphate were 8.4 and 0.5 mg/L with their average removal efficiencies of 86.8% and 90.9%. High-throughput sequencing analysis revealed that, Candidatus_Competibacter conducted nitrogen removal endogenous denitrification and Candidatus_Accumulibacter and Tetrasphaera ensured phosphorus removal.
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Affiliation(s)
- Ji Zhao
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100124, PR China
| | - Xiaoxia Wang
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100124, PR China
| | - Xiyao Li
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100124, PR China
| | - Shuyuan Jia
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100124, PR China
| | - Qi Wang
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100124, PR China
| | - Yongzhen Peng
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100124, PR China.
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Yang M, Shi J, Xu Z, Zhu S, Cui Y. Phosphorus removal and recovery from fosfomycin pharmaceutical wastewater by the induced crystallization process. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2019; 231:207-212. [PMID: 30342333 DOI: 10.1016/j.jenvman.2018.10.036] [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: 06/17/2018] [Revised: 09/25/2018] [Accepted: 10/11/2018] [Indexed: 06/08/2023]
Abstract
The excessive release of phosphorus is a main cause of eutrophication, but phosphorus itself is an important non-renewable resource. If phosphorus could be recovered from wastewater, it can not only reduce the pollution, but also reach the aim of resource recycle. An induced crystallization process was combined with the schorl/H2O2 system to remove and recover phosphorus from the fosfomycin pharmaceutical wastewater. Firstly, in the schorl/H2O2 heterogeneous Fenton system, the organic phosphorus (OP) in fosfomycin pharmaceutical wastewater was transformed to the inorganic phosphorus (IP), and then IP was recovered by hydroxyapatite (HAP) induced crystallization process. In sequence batch reactors (SBR), the entire crystallization process went through 60 cycles, and each of the cycle lasted for 12 h, including 2 h for reaction and 10 h for sedimentation. The influence of different initial pH values, which were 8, 9, 10 and 11, on the induced crystallized product was investigated. The morphology and structure of the induced crystallized product were analysed. The results indicated that when the pH value was about 8, most of the recovery products was in the form of dicalcium phosphate anhydrous (DCP, CaHPO4). At pH 9 the recovery products were mainly DCP and HAP. As pH increased to 10 or 11, most of the recovery products would be HAP and calcium carbonate. Carbonate involved in the crystallization reaction, especially at pH 11.
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Affiliation(s)
- Meigui Yang
- School of Engineering, China Pharmaceutical University, Nanjing, 211198, People's Republic of China
| | - Jing Shi
- School of Engineering, China Pharmaceutical University, Nanjing, 211198, People's Republic of China; Department of Civil Engineering, McMaster University, Hamilton, L8S 4L7, Canada.
| | - Zhengwen Xu
- School of Environment, Nanjing University of Information Science & Technology, Nanjing, 210044, People's Republic of China
| | - Siyi Zhu
- School of Engineering, China Pharmaceutical University, Nanjing, 211198, People's Republic of China
| | - Yixin Cui
- School of Engineering, China Pharmaceutical University, Nanjing, 211198, People's Republic of China
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37
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Zeng F, Jin W, Zhao Q. Temperature effect on extracellular polymeric substances (EPS) and phosphorus accumulating organisms (PAOs) for phosphorus release of anaerobic sludge. RSC Adv 2019; 9:2162-2171. [PMID: 35516154 PMCID: PMC9059762 DOI: 10.1039/c8ra10048a] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2018] [Accepted: 01/08/2019] [Indexed: 12/28/2022] Open
Abstract
Phosphorus (P) is an essential element for living organisms and anaerobic sludge is an attractive source for P recovery. Anaerobic P release depends on both phosphorus-accumulating organisms (PAOs) and extracellular polymeric substances (EPS). However, the P release contributed by the microbial cells and EPS was not addressed completely and the effect of temperature on the mechanism of P release and transformation was rarely considered. This study, therefore, investigated the effects of temperature on the P fraction and the relationship between PAOs metabolic pathway and EPS reaction using the Standards in Measurements and Testing (SMT) protocol and the 31P nuclear magnetic resonance (31P-NMR) experiments. Experimental results showed that the temperature not only affected the metabolism of PAOs, but also significantly influenced the EPS components and the hydrolysis of EPS-associated polyphosphate (poly-P). And the P release mainly occurred due to biological mechanisms with a conversion from non-reactive P (NRP) in both intracellular and extracellular substances to reactive P (RP) fractions. The highest concentration of total P in the supernatant (TPL) occurred at 15 °C, and the TPL release from the solid to liquid phase was better fitted with pseudo-second-order kinetic model. More organic P in the sludge (OPs) released from the sludge phase at 35 °C would convert into inorganic P (IPs) and non-apatite inorganic phosphorus (NAIPs) was the most labile P fraction for P release. The hydrolysis of EPS-associated poly-P was enhanced by higher temperatures with the degradation of the long-chain poly-P by PAOs. Meanwhile, a lower temperature could obviously improve the P release because the dominance of PAOs would potentially shift to GAOs with the increase of temperature. But the very-low temperature (5 °C) was not beneficial for the P release and suppressed the microbial activities.
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Affiliation(s)
- Fanzhe Zeng
- State Key Laboratory of Urban Water Resources and Environment (SKLUWRE), School of Environment, Harbin Institute of Technology Harbin 150090 China +86-45186283017
| | - Wenbiao Jin
- School of Civil & Environmental Engineering, Harbin Institute of Technology Shenzhen 518055 China
| | - Qingliang Zhao
- State Key Laboratory of Urban Water Resources and Environment (SKLUWRE), School of Environment, Harbin Institute of Technology Harbin 150090 China +86-45186283017
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Cai W, Jin M, Zhao Z, Lei Z, Zhang Z, Adachi Y, Lee DJ. Influence of ferrous iron dosing strategy on aerobic granulation of activated sludge and bioavailability of phosphorus accumulated in granules. ACTA ACUST UNITED AC 2018. [DOI: 10.1016/j.biteb.2018.03.004] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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39
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Gong B, Wang Y, Wang J, Huang W, Zhou J, He Q. Intensified nitrogen and phosphorus removal by embedding electrolysis in an anaerobic-anoxic-oxic reactor treating low carbon/nitrogen wastewater. BIORESOURCE TECHNOLOGY 2018; 256:562-565. [PMID: 29454625 DOI: 10.1016/j.biortech.2018.02.014] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2017] [Revised: 01/31/2018] [Accepted: 02/02/2018] [Indexed: 06/08/2023]
Abstract
A modified anaerobic-anoxic-oxic (AAO) reactor embedding electrolysis was constructed for treatment of low carbon/nitrogen (C/N) wastewater. The effect of different current conditions on the performance of reactor was investigated in this study. When the current ranged from 0 mA to 200 mA, the removal efficiency of total nitrogen (TN) increased from 61.25% (0 mA) to 75.60% (200 mA), and that of total phosphorus (TP) increased from 72.24% (0 mA) to 93.93% (200 mA). In addition, the removal efficiencies of chemical oxygen demand (COD) and NH4+-N were not affected. The results indicated that AAO reactor coupling electrolysis was an effective way to strengthen the removal of nitrogen and phosphorus for treatment of low C/N wastewater.
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Affiliation(s)
- Benzhou Gong
- Faculty of Urban Construction and Environmental Engineering, Chongqing University, Chongqing 400045, PR China
| | - Yingmu Wang
- Faculty of Urban Construction and Environmental Engineering, Chongqing University, Chongqing 400045, PR China
| | - Jiale Wang
- Faculty of Urban Construction and Environmental Engineering, Chongqing University, Chongqing 400045, PR China
| | - Wei Huang
- Faculty of Urban Construction and Environmental Engineering, Chongqing University, Chongqing 400045, PR China
| | - Jian Zhou
- Faculty of Urban Construction and Environmental Engineering, Chongqing University, Chongqing 400045, PR China; Key Laboratory of the Three Gorges Reservoir's Eco-Environments, Ministry of Education, Chongqing University, Chongqing 400045, PR China.
| | - Qiang He
- Faculty of Urban Construction and Environmental Engineering, Chongqing University, Chongqing 400045, PR China; Key Laboratory of the Three Gorges Reservoir's Eco-Environments, Ministry of Education, Chongqing University, Chongqing 400045, PR China
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40
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Liu Y, Li X, Zhao J, Wang D, Yang Q, Zeng G. The feasibility of enhanced biological phosphorus removal in the novel oxic/extended idle process using fermentation liquid from sludge fermentation. RSC Adv 2018; 8:3321-3327. [PMID: 35541212 PMCID: PMC9077545 DOI: 10.1039/c7ra12886j] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2017] [Accepted: 01/10/2018] [Indexed: 11/28/2022] Open
Abstract
Carbon sources are essential for biological phosphorus removal (BPR); the carbon sources, however, are often inadequate in municipal wastewater treatment plants. This study demonstrated the feasibility of sludge fermentation liquid enhanced by biosurfactant alkylpolyglycosides (APG) as carbon sources to improve the performance of BPR in the novel oxic/extended idle (O/EI) reactor and the underlying mechanism was also investigated. The results showed that APG induced fermentation liquid could enhance the BPR performance in the O/EI reactor, and the BPR efficiency was 95.2%, which was significantly higher than that in the conventional anaerobic/oxic (A/O) reactor. Mechanism investigation showed that compared with the A/O reactor, the O/EI reactor enriched more polyphosphate accumulating organisms (PAOs) (38.2%), but less glycogen accumulating organisms (GAOs) when the APG-induced fermentation liquid was used as carbon source. The transformations of the polyhydroxyalkanoates (PHA) and glycogen in the O/EI reactor were lower than those in the A/O reactor. Further study found that the activities of polyphosphate kinase (PPK) and acetyl-CoA synthases (ACS) in the O/EI reactor were significantly higher than those of the A/O reactor, which was consistent with the higher BPR efficiency in the O/EI reactor. Long-term effect of fermented liquid as carbon source on effluent COD and SOP in O/EI reactor.![]()
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Affiliation(s)
- Yang Liu
- College of Environmental Science and Engineering
- Hunan University
- Changsha 410082
- P. R. China
- Key Laboratory of Environmental Biology and Pollution Control
| | - Xiaoming Li
- College of Environmental Science and Engineering
- Hunan University
- Changsha 410082
- P. R. China
- Key Laboratory of Environmental Biology and Pollution Control
| | - Jianwei Zhao
- College of Environmental Science and Engineering
- Hunan University
- Changsha 410082
- P. R. China
- Key Laboratory of Environmental Biology and Pollution Control
| | - Dongbo Wang
- College of Environmental Science and Engineering
- Hunan University
- Changsha 410082
- P. R. China
- Key Laboratory of Environmental Biology and Pollution Control
| | - Qi Yang
- College of Environmental Science and Engineering
- Hunan University
- Changsha 410082
- P. R. China
- Key Laboratory of Environmental Biology and Pollution Control
| | - Guangming Zeng
- College of Environmental Science and Engineering
- Hunan University
- Changsha 410082
- P. R. China
- Key Laboratory of Environmental Biology and Pollution Control
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Long X, Tang R, Fang Z, Xie C, Li Y, Xian G. The roles of loosely-bound and tightly-bound extracellular polymer substances in enhanced biological phosphorus removal. CHEMOSPHERE 2017; 189:679-688. [PMID: 28965063 DOI: 10.1016/j.chemosphere.2017.09.067] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2017] [Revised: 09/07/2017] [Accepted: 09/15/2017] [Indexed: 06/07/2023]
Abstract
Extracellular polymeric substances (EPS) have be founded to participate in the process of enhanced biological phosphorus removal (EBPR), but the exact role of EPS in EBPR process is unclear. In this work, the roles of loosely-bound EPS (LB-EPS), tightly-bound EPS (TB-EPS) and microbial cell in EBPR were explored, taking the activated sludge from 4 lab-scale A/O-SBR reactors with different temperatures and organic substrates as objects. It was founded that the P of EBPR activated sludge was mainly stored in TB-EPS, but the P of non-EBPR activated sludge was primarily located in microbial cell. The P release and uptake of EBPR activated sludge was attributed to the combined action of TB-EPS and microbial cell. Furthermore, TB-EPS played an more important role than microbial cell in EBPR process. With the analysis of 31P NMR spectroscopy, both polyP and orthoP were the main phosphorus species of TB-EPS in EBPR sludge, but only orthoP was the main phosphorus species of LB-EPS and microbial cell. During the anaerobic-aerobic cycle, the roles of LB-EPS, TB-EPS and microbial cell in transfer and transformation of P in EBPR sludge were obviously different. LB-EPS transported and retained orthoP, and microbial cell directly anaerobically released or aerobically absorbed orthoP. Importantly, TB-EPS not only transported and retained orthoP, but also participated in biological phosphorus accumulation. The EBPR performance of sludge was closely related with the polyp in TB-EPS, which might be synthesized and decomposed by extracellular enzyme.
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Affiliation(s)
- Xiangyu Long
- Department of National Defense Architectural Planning & Environmental Engineering, Logistic Engineering University, Chongqing, 401311, China
| | - Ran Tang
- Department of National Defense Architectural Planning & Environmental Engineering, Logistic Engineering University, Chongqing, 401311, China.
| | - Zhendong Fang
- Department of National Defense Architectural Planning & Environmental Engineering, Logistic Engineering University, Chongqing, 401311, China
| | - Chaoxin Xie
- Department of National Defense Architectural Planning & Environmental Engineering, Logistic Engineering University, Chongqing, 401311, China
| | - Yongqin Li
- Department of National Defense Architectural Planning & Environmental Engineering, Logistic Engineering University, Chongqing, 401311, China
| | - Guang Xian
- Department of National Defense Architectural Planning & Environmental Engineering, Logistic Engineering University, Chongqing, 401311, China
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42
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Melia PM, Cundy AB, Sohi SP, Hooda PS, Busquets R. Trends in the recovery of phosphorus in bioavailable forms from wastewater. CHEMOSPHERE 2017; 186:381-395. [PMID: 28802130 DOI: 10.1016/j.chemosphere.2017.07.089] [Citation(s) in RCA: 87] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2017] [Revised: 07/16/2017] [Accepted: 07/17/2017] [Indexed: 05/09/2023]
Abstract
Addressing food security issues arising from phosphorus (P) scarcity is described as one of the greatest global challenges of the 21st Century. Dependence on inorganic phosphate fertilisers derived from limited geological sources of P creates an urgent need to recover P from wastes and treated waters, in safe forms that are also effective agriculturally - the established process of P removal by chemical precipitation using Fe or Al salts, is effective for P removal but leads to residues with limited bioavailability and contamination concerns. One of the greatest opportunities for P recovery is at wastewater treatment plants (WWTPs) where the crystallisation of struvite and Ca-P from enhanced biological P removal (EBPR) sludge is well developed and already shown to be economically and operationally feasible in some WWTPs. However, recovery through this approach can be limited to <25% efficiency unless chemical extraction is applied. Thermochemical treatment of sludge ash produces detoxified residues that are currently utilised by the fertiliser industry; wet chemical extraction can be economically feasible in recovering P and other by-products. The bioavailability of recovered P depends on soil pH as well as the P-rich material in question. Struvite is a superior recovered P product in terms of plant availability, while use of Ca-P and thermochemically treated sewage sludge ash is limited to acidic soils. These technologies, in addition to others less developed, will be commercially pushed forward by revised fertiliser legislation and foreseeable legislative limits for WWTPs to achieve discharges of <1 mg P/L.
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Affiliation(s)
- Patrick M Melia
- Kingston University, Faculty of Science, Engineering and Computing, Kingston Upon Thames, KT1 2EE, UK.
| | - Andrew B Cundy
- University of Southampton, School of Ocean and Earth Science, Southampton, SO14 3ZH, UK
| | - Saran P Sohi
- UK Biochar Research Centre, The University of Edinburgh, School of GeoSciences, Edinburgh, EH9 3FF, UK
| | - Peter S Hooda
- Kingston University, Faculty of Science, Engineering and Computing, Kingston Upon Thames, KT1 2EE, UK
| | - Rosa Busquets
- Kingston University, Faculty of Science, Engineering and Computing, Kingston Upon Thames, KT1 2EE, UK
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43
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Chan C, Guisasola A, Baeza JA. Enhanced Biological Phosphorus Removal at low Sludge Retention Time in view of its integration in A-stage systems. WATER RESEARCH 2017; 118:217-226. [PMID: 28433692 DOI: 10.1016/j.watres.2017.04.010] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/05/2017] [Revised: 03/31/2017] [Accepted: 04/04/2017] [Indexed: 06/07/2023]
Abstract
The two-stage A/B WWTP configuration is being studied as a possible wastewater treatment with low energy consumption or even with a net energy generation. The first phase, A-stage, is designed to remove organic matter at very short Sludge Retention Time (SRT), while the B-stage is based on autotrophic nitrogen removal. However, P-removal in the A/B process usually only relies on precipitation. This work studies the potential inclusion of Enhanced Biological Phosphorus Removal (EBPR) in the A-stage phase. For this aim, the long-term operation of three different Sequencing Batch Reactors (SBR) enriched in Accumulibacter at low SRT was thoroughly monitored for more than three months each one. This work shows that EBPR can be sustained with a minimal SRT of 3.6 d at 25 °C. Lower values, SRT = 3 d, led to the PAO washout because of a reduction in P-release and P-uptake, an increase of the VSS/TSS ratio and a decrease of the P/C ratio. The Yobs could be related to the SRT with the parameters Y = 0.39 ± 0.05 gCODX·g-1CODS and kD = 0.06 ± 0.04 d-1 which leads to a 24% increase of biomass yield when SRT was reduced from 10 to 4 d.
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Affiliation(s)
- Carlos Chan
- GENOCOV, Departament d'Enginyeria Química, Biològica i Ambiental, Escola d'Enginyeria, Universitat Autònoma de Barcelona, 08193, Bellaterra, Barcelona, Spain.
| | - Albert Guisasola
- GENOCOV, Departament d'Enginyeria Química, Biològica i Ambiental, Escola d'Enginyeria, Universitat Autònoma de Barcelona, 08193, Bellaterra, Barcelona, Spain.
| | - Juan Antonio Baeza
- GENOCOV, Departament d'Enginyeria Química, Biològica i Ambiental, Escola d'Enginyeria, Universitat Autònoma de Barcelona, 08193, Bellaterra, Barcelona, Spain.
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44
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Chen Y, Lan S, Wang L, Dong S, Zhou H, Tan Z, Li X. A review: Driving factors and regulation strategies of microbial community structure and dynamics in wastewater treatment systems. CHEMOSPHERE 2017; 174:173-182. [PMID: 28161518 DOI: 10.1016/j.chemosphere.2017.01.129] [Citation(s) in RCA: 74] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/14/2016] [Revised: 01/24/2017] [Accepted: 01/25/2017] [Indexed: 06/06/2023]
Abstract
The performance and stabilization of biological wastewater treatment systems 1are closely related to the microbial community structure and dynamics. In this paper, the effects and mechanisms of influent composition, process configuration, operating parameters (dissolved oxygen [DO], pH, hydraulic retention time [HRT] and sludge retention time [SRT]) and environmental condition (temperature) to the change of microbial community structure and process performance (nitrification, denitrification, biological phosphorus removal, organics mineralization and utilization, etc.) are critically reviewed. Furthermore, some strategies for microbial community structure regulation, mainly bioaugmentation, process adjustment and operating parameters optimization, applied in the current wastewater treatment systems are also discussed. Although the recent studies have strengthened our understanding on the relationship between microbial community structure and wastewater treatment process performance, how to fully tap the microbial information, optimize the microbial community structure and maintain the process performance in wastewater treatment systems are still full of challenges.
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Affiliation(s)
- Yangwu Chen
- Key Laboratory of Environmental and Applied Microbiology, Chengdu Institute of Biology, Chinese Academy of Sciences, 610041, Chengdu, PR China; Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, 610041, Chengdu, PR China; University of Chinese Academy of Sciences, 100049, Beijing, PR China
| | - Shuhuan Lan
- Key Laboratory of Environmental and Applied Microbiology, Chengdu Institute of Biology, Chinese Academy of Sciences, 610041, Chengdu, PR China; Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, 610041, Chengdu, PR China
| | - Longhui Wang
- Key Laboratory of Environmental and Applied Microbiology, Chengdu Institute of Biology, Chinese Academy of Sciences, 610041, Chengdu, PR China; Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, 610041, Chengdu, PR China
| | - Shiyang Dong
- Key Laboratory of Environmental and Applied Microbiology, Chengdu Institute of Biology, Chinese Academy of Sciences, 610041, Chengdu, PR China; Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, 610041, Chengdu, PR China; University of Chinese Academy of Sciences, 100049, Beijing, PR China
| | - Houzhen Zhou
- Key Laboratory of Environmental and Applied Microbiology, Chengdu Institute of Biology, Chinese Academy of Sciences, 610041, Chengdu, PR China; Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, 610041, Chengdu, PR China
| | - Zhouliang Tan
- Key Laboratory of Environmental and Applied Microbiology, Chengdu Institute of Biology, Chinese Academy of Sciences, 610041, Chengdu, PR China; Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, 610041, Chengdu, PR China.
| | - Xudong Li
- Key Laboratory of Environmental and Applied Microbiology, Chengdu Institute of Biology, Chinese Academy of Sciences, 610041, Chengdu, PR China; Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, 610041, Chengdu, PR China
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45
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Yilmaz G, Cetin E, Bozkurt U, Aleksanyan Magden K. Effects of ferrous iron on the performance and microbial community in aerobic granular sludge in relation to nutrient removal. Biotechnol Prog 2017; 33:716-725. [DOI: 10.1002/btpr.2456] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2016] [Revised: 02/20/2017] [Indexed: 11/10/2022]
Affiliation(s)
- Gulsum Yilmaz
- Department of Environmental EngineeringIstanbul UniversityAvcilar Istanbul34320 Turkey
| | - Ender Cetin
- Department of Environmental EngineeringIstanbul UniversityAvcilar Istanbul34320 Turkey
| | - Umit Bozkurt
- Department of Environmental EngineeringIstanbul UniversityAvcilar Istanbul34320 Turkey
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46
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Hu Z, Lu X, Sun P, Hu Z, Wang R, Lou C, Han J. Understanding the performance of microbial community induced by ZnO nanoparticles in enhanced biological phosphorus removal system and its recoverability. BIORESOURCE TECHNOLOGY 2017; 225:279-285. [PMID: 27898318 DOI: 10.1016/j.biortech.2016.11.080] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2016] [Revised: 11/18/2016] [Accepted: 11/19/2016] [Indexed: 06/06/2023]
Abstract
In this study, the impacts of ZnO Nanoparticles (NPs) on the microbial community in enhanced biological phosphorus removal (EBPR) system and its recoverability were investigated. High-throughput sequencing was applied to study the microbial community shift. Results show that the species richness in the EBPR system was reduced under the condition of ZnO NPs with high concentration (above 6mg/L). Evolution analysis suggests that higher concentration ZnO NPs induced more microbial community shift. According to the analysis on genus level, Competibacter was more impressionable than Accumulibacter after exposure to 2mg/L ZnO NPs. Nonetheless, this phenomenon could not be found as the concentration of ZnO NPs got higher (above 6mg/L). Accumulibacter could reach to the initial level after recover for 20days, whereas Competibacter could not recover even when the concentration of ZnO NPs was only 2mg/L. Interestingly, although the phosphorus removal (P-removal) process was re-achieved, the microbial community in reactors was irreversible.
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Affiliation(s)
- Zhetai Hu
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310012, China
| | - Xuanyu Lu
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310012, China
| | - Peide Sun
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310012, China.
| | - Zhirong Hu
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310012, China; GL Environment Inc, Hamilton, Canada
| | - Ruyi Wang
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310012, China
| | - Chengke Lou
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310012, China
| | - Jingyi Han
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310012, China
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47
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Weerasekara AW, Jenkins S, Abbott LK, Waite I, McGrath JW, Larma I, Eroglu E, O'Donnell A, Whiteley AS. Microbial phylogenetic and functional responses within acidified wastewater communities exhibiting enhanced phosphate uptake. BIORESOURCE TECHNOLOGY 2016; 220:55-61. [PMID: 27566512 DOI: 10.1016/j.biortech.2016.08.037] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2016] [Revised: 08/08/2016] [Accepted: 08/10/2016] [Indexed: 06/06/2023]
Abstract
Acid stimulated accumulation of insoluble phosphorus within microbial cells is highly beneficial to wastewater treatment but remains largely unexplored. Using single cell analyses and next generation sequencing, the response of active polyphosphate accumulating microbial communities under conditions of enhanced phosphorus uptake under both acidic and aerobic conditions was characterised. Phosphorus accumulation activities were highest under acidic conditions (pH 5.5>8.5), where a significant positive effect on bioaccumulation was observed at pH 5.5 when compared to pH 8.5. In contrast to the Betaproteobacteria and Actinobacteria dominated enhanced biological phosphorus removal process, the functionally active polyP accumulators at pH 5.5 belonged to the Gammaproteobacteria, with key accumulators identified as members of the families Aeromonadaceae and Enterobacteriaceae. This study demonstrated a significant enrichment of key polyphosphate kinase and exopolyphosphatase genes within the community metagenome after acidification, concomitant with an increase in P accumulation kinetics.
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Affiliation(s)
- Anjani W Weerasekara
- School of Earth and Environment, Faculty of Science, The University of Western Australia, 35 Stirling Highway, Crawley 6009, Western Australia, Australia; Institute of Agriculture, The University of Western Australia, 35 Stirling Highway, Crawley 6009, Western Australia, Australia
| | - Sasha Jenkins
- School of Earth and Environment, Faculty of Science, The University of Western Australia, 35 Stirling Highway, Crawley 6009, Western Australia, Australia; Institute of Agriculture, The University of Western Australia, 35 Stirling Highway, Crawley 6009, Western Australia, Australia
| | - Lynette K Abbott
- School of Earth and Environment, Faculty of Science, The University of Western Australia, 35 Stirling Highway, Crawley 6009, Western Australia, Australia; Institute of Agriculture, The University of Western Australia, 35 Stirling Highway, Crawley 6009, Western Australia, Australia
| | - Ian Waite
- School of Earth and Environment, Faculty of Science, The University of Western Australia, 35 Stirling Highway, Crawley 6009, Western Australia, Australia; Institute of Agriculture, The University of Western Australia, 35 Stirling Highway, Crawley 6009, Western Australia, Australia
| | - John W McGrath
- School of Biological Sciences and the Institute for Global Food Security, The Queens University of Belfast, Medical Biology Centre, 97 Lisburn Road, Belfast BT9 7BL, Northern Ireland, United Kingdom
| | - Irma Larma
- Centre for Microscopy, Characterisation and Analysis (CMCA), The University of Western Australia, Crawley, 35 Stirling Highway, 6009 Western Australia, Australia
| | - Ela Eroglu
- Department of Chemical Engineering, Curtin University, Perth 6845, Western Australia, Australia
| | - Anthony O'Donnell
- School of Earth and Environment, Faculty of Science, The University of Western Australia, 35 Stirling Highway, Crawley 6009, Western Australia, Australia; Institute of Agriculture, The University of Western Australia, 35 Stirling Highway, Crawley 6009, Western Australia, Australia
| | - Andrew S Whiteley
- School of Earth and Environment, Faculty of Science, The University of Western Australia, 35 Stirling Highway, Crawley 6009, Western Australia, Australia.
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48
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Ye Y, Ngo HH, Guo W, Liu Y, Zhang X, Guo J, Ni BJ, Chang SW, Nguyen DD. Insight into biological phosphate recovery from sewage. BIORESOURCE TECHNOLOGY 2016; 218:874-881. [PMID: 27434305 DOI: 10.1016/j.biortech.2016.07.003] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2016] [Revised: 07/01/2016] [Accepted: 07/02/2016] [Indexed: 06/06/2023]
Abstract
The world's increasing population means that more food production is required. A more sustainable supply of fertilizers mainly consisting of phosphate is needed. Due to the rising consumption of scarce resources and limited natural supply of phosphate, the recovery of phosphate and their re-use has potentially high market value. Sewage has high potential to recover a large amount of phosphate in a circular economy approach. This paper focuses on utilization of biological process integrated with various subsequent processes to concentrate and recycle phosphate which are derived from liquid and sludge phases. The phosphate accumulation and recovery are discussed in terms of mechanism and governing parameters, recovery efficiency, application at plant-scale and economy.
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Affiliation(s)
- Yuanyao Ye
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Sydney, NWS 2007, Australia
| | - Huu Hao Ngo
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Sydney, NWS 2007, Australia; Department of Environmental and Municipal Engineering, Tianjin Chengjian University, Jinjing Road 26, Tianjin 300384, China.
| | - Wenshan Guo
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Sydney, NWS 2007, Australia
| | - Yiwen Liu
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Sydney, NWS 2007, Australia
| | - Xinbo Zhang
- Department of Environmental and Municipal Engineering, Tianjin Chengjian University, Jinjing Road 26, Tianjin 300384, China
| | - Jianbo Guo
- Department of Environmental and Municipal Engineering, Tianjin Chengjian University, Jinjing Road 26, Tianjin 300384, China
| | - Bing-Jie Ni
- State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
| | - Soon Woong Chang
- Department of Environmental Energy and Engineering, Kyonggi University, 442-760, Republic of Korea
| | - Dinh Duc Nguyen
- Department of Environmental Energy and Engineering, Kyonggi University, 442-760, Republic of Korea
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49
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Nur T, Loganathan P, Kandasamy J, Vigneswaran S. Phosphate Adsorption from Membrane Bioreactor Effluent Using Dowex 21K XLT and Recovery as Struvite and Hydroxyapatite. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2016; 13:ijerph13030277. [PMID: 26950136 PMCID: PMC4808940 DOI: 10.3390/ijerph13030277] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/29/2015] [Revised: 02/01/2016] [Accepted: 02/26/2016] [Indexed: 11/16/2022]
Abstract
Discharging phosphate through wastewaters into waterways poses a danger to the natural environment due to the serious risks of eutrophication and health of aquatic organisms. However, this phosphate, if economically recovered, can partly overcome the anticipated future scarcity of phosphorus (P) resulting from exhaustion of natural phosphate rock reserves. An experiment was conducted to determine the efficiency of removing phosphate from a membrane bioreactor effluent (pH 7.0-7.5, 20, 35 mg phosphate/L) produced in a water reclamation plant by adsorption onto Dowex 21K XLT ion exchange resin and recover the phosphate as fertilisers. The data satisfactorily fitted to Langmuir adsorption isotherm with a maximum adsorption capacity of 38.6 mg · P/g. The adsorbed phosphate was quantitatively desorbed by leaching the column with 0.1 M NaCl solution. The desorbed phosphate was recovered as struvite when ammonium and magnesium were added at the molar ratio of phosphate, ammonium and magnesium of 1:1:1 at pH 9.5. Phosphate was also recovered from the desorbed solution as hydroxyapatite precipitate by adding calcium hydroxide to the solution at a phosphate to calcium molar ratio of 1:2 at pH 7.0. The P contents of struvite and hydroxyapatite produced were close to those of the respective commercial phosphate fertilisers.
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Affiliation(s)
- Tanjina Nur
- Centre for Technology in Water and Wastewater, Faculty of Engineering and Information Technology, University of Technology Sydney, Broadway, Sydney NSW 2007, Australia.
| | - Paripurnanda Loganathan
- Centre for Technology in Water and Wastewater, Faculty of Engineering and Information Technology, University of Technology Sydney, Broadway, Sydney NSW 2007, Australia.
| | - Jaya Kandasamy
- Centre for Technology in Water and Wastewater, Faculty of Engineering and Information Technology, University of Technology Sydney, Broadway, Sydney NSW 2007, Australia.
| | - Saravanamuthu Vigneswaran
- Centre for Technology in Water and Wastewater, Faculty of Engineering and Information Technology, University of Technology Sydney, Broadway, Sydney NSW 2007, Australia.
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50
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