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Wang C, Jiang T, Huang J, Chen M, Hu H, Peng L, Wu L, Chaocheng Z, Zhang Q. Efficient incorporation of highly migratory thallium into struvite structure: Unraveling the stabilization mechanisms from a mineralogical perspective. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 935:173329. [PMID: 38772482 DOI: 10.1016/j.scitotenv.2024.173329] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/03/2024] [Revised: 05/13/2024] [Accepted: 05/15/2024] [Indexed: 05/23/2024]
Abstract
The remediation of high-concentration thallium (Tl+) contaminated wastewater is a critical environmental concern. Current research emphasizes the effectiveness of adsorption and oxidation methods for Tl+ treatment, yet challenges persist in enhancing their performance. This study explores the feasibility of emergency Tl+ wastewater treatment and elucidates the mechanisms of Tl+ incorporation into mineral structures, with a focus on the struvite mineral as a framework for Tl+ integration via NH4+ ion exchange. To assess the efficacy and mechanisms of Tl+ immobilization, we utilized comprehensive analytical techniques, including X-ray Diffraction (XRD), X-ray Photoelectron Spectroscopy (XPS), Fourier-Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscopy with Energy-Dispersive X-ray Spectroscopy (SEM-EDS), Thermogravimetric Analysis (TG), and Density Functional Theory (DFT) calculations. The findings reveal that struvite adsorbs Tl+ onto its surface, followed by an ion exchange process between monovalent cations (NH4+/K+) within the structure and Tl+. Ultimately, Tl+ is incorporated in the form of a (NH4,Tl)MgPO4 solid solution within the structure, achieving a remarkable maximum incorporation capacity of 320.56 mg/g, which significantly surpasses the capacity of typical adsorbents. The findings demonstrate significant Tl+ incorporation, validating the approach for emergency wastewater treatment and suggesting the potential of mineralogy in environmental remediation. This research contributes to advancing heavy metal wastewater treatment strategies, offering a foundation for further investigation.
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Affiliation(s)
- Chao Wang
- School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, China
| | - Ting Jiang
- School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, China
| | - Junwei Huang
- School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, China
| | - Min Chen
- School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, China.
| | - Huimin Hu
- State Environmental Protection Key Laboratory of Water Environmental Simulation and Pollution Control, Ministry of Ecology and Environment, Guangzhou 510655, China
| | - Lei Peng
- School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, China
| | - Lei Wu
- The First Construction and Installation Company of China Construction Third Engineering Bureau Ltd, China
| | - Zeng Chaocheng
- School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, China
| | - Qiwu Zhang
- School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, China.
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2
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Zhang H, Liu WH, Gao YY, Sun P, Zeng YP, Ma LL, Wu JN, Zhou SG, Cui XQ, Zeng RJ, Wang HF. A novel approach for sludge deep-dewatering via flowing-out enhancement but not relying on cell lysis and bound water release. WATER RESEARCH 2024; 257:121743. [PMID: 38728775 DOI: 10.1016/j.watres.2024.121743] [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: 01/24/2024] [Revised: 04/14/2024] [Accepted: 05/05/2024] [Indexed: 05/12/2024]
Abstract
Effective deep-dewatering is crucial for wastewater sludge management. Currently, the dominant methods focus on promoting cell lysis to release intracellular water, but these techniques often lead to secondary pollution and require stringent conditions, limiting their practical use. This study explores an innovative method using a commercially available complex quaternary ammonium salt surfactant, known as G-agent. This agent remarkably reduces the sludge water content from 98.6 % to 56.8 % with a low dosage (50 mg/g DS) and under neutral pH conditions. This approach surpasses Fenton oxidation in terms of dewatering efficiency and avoids the necessity for cell lysis and bound water release, thereby reducing the risk of secondary pollution in the filtrate, including heavy metals, nitrogen, phosphorus, and other contaminants. The G-agent plays a significant role in destabilizing flocs and enhancing flocculation during the conditioning and initial dewatering stages, effectively reducing the solid-liquid interfacial affinity of the sludge. In the compression filtration stage, the agent's solidification effect is crucial in forming a robust skeleton that improves pore connectivity within the filter cake, leading to increased water permeability, drainage performance and water flow-out efficiency. This facilitates deep dewatering of sludge without cell lysis. The study reveals that the G-agent primarily improves water flow-out efficiency rather than water flowability, indicating that cell lysis and bound water release are not indispensable prerequisites for sludge deep-dewatering. Furthermore, it presents an encouraging prospect for overcoming the limitations associated with conventional sludge deep-dewatering processes.
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Affiliation(s)
- Hao Zhang
- Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Wen-Hui Liu
- Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Yun-Yan Gao
- Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Ping Sun
- Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Yuan-Ping Zeng
- Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Lin-Lin Ma
- Instrumental Analysis Center, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Jiang-Nan Wu
- Fujian Haixia Environmental Protection Group Co.,Ltd, Fuzhou 350002, China
| | - Shun-Gui Zhou
- Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Xi-Qin Cui
- Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou 350002, China.
| | - Raymond Jianxiong Zeng
- Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou 350002, China.
| | - Hou-Feng Wang
- Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou 350002, China.
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Long A, Weber N, Krampe J, Peer S, Rechberger H, Zessner M, Zoboli O. Multi-criteria analysis of strategies towards sustainable recycling of phosphorus from sewage sludge in Austria. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2024; 362:121339. [PMID: 38824897 DOI: 10.1016/j.jenvman.2024.121339] [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: 02/23/2024] [Revised: 05/10/2024] [Accepted: 05/30/2024] [Indexed: 06/04/2024]
Abstract
To promote optimal phosphorus (P) recovery from municipal wastewater and sewage sludge with viable legal instruments, it is imperative to understand the regional and national consequences of different legal requirements for recycling. In this study we develop a scenario-based analysis to assess the environmental and economic impact of different national P recovery strategies in the context of a detailed representation of the existing Austrian wastewater infrastructure. This assessment combines material flow analysis, life cycle assessment and life cycle costing and includes the indicators P recycling rate, P utilization degree, heavy metal removal rate, share of heavy metals' content in wastewater redirected to agricultural soils, global warming potential, cumulated energy demand, terrestrial acidification potential, volume of freight transport and annual costs. The following main conclusions can be drawn. P recovery from ash shows the highest potential regarding the utilization of P from wastewater. A high P utilization from wastewater should rely on recovery technologies that decontaminate products, otherwise pollutant loads to agricultural soils might increase. P recovery to the extent of 60-85 % of P in WWTPs influent can be achieved by savings/costs of -0.8 to +4.7 EUR inhabitant-1 yr-1 in addition to current cost of the wastewater treatment/sludge disposal system. Key factors to be considered for costs are the choice of recovery process, revenues from products, and the use of existing incineration infrastructure. P recovery can lead to the reduction of greenhouse gas emissions in Austria if nitrous oxide emissions from sludge incineration are limited and efficient heat utilization strategies are implemented. There is a trade-off in terms of environmental and economic costs in choosing a more centralized or decentralized mono-incineration strategy.
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Affiliation(s)
- A Long
- Institute for Water Quality and Resource Management - Research Unit for Water Quality, TU Wien, Karlsplatz 13/226-1, 1040, Vienna, Austria
| | - N Weber
- Institute for Water Quality and Resource Management - Research Unit for Water Quality, TU Wien, Karlsplatz 13/226-1, 1040, Vienna, Austria
| | - J Krampe
- Institute for Water Quality and Resource Management - Research Unit for Water Quality, TU Wien, Karlsplatz 13/226-1, 1040, Vienna, Austria
| | - S Peer
- Institute for Water Quality and Resource Management - Research Unit for Water Quality, TU Wien, Karlsplatz 13/226-1, 1040, Vienna, Austria
| | - H Rechberger
- Institute for Water Quality and Resource Management - Research Unit for Waste and Resource Management, TU Wien, Karlsplatz 13/226-2, 1040, Vienna, Austria
| | - M Zessner
- Institute for Water Quality and Resource Management - Research Unit for Water Quality, TU Wien, Karlsplatz 13/226-1, 1040, Vienna, Austria
| | - O Zoboli
- Institute for Water Quality and Resource Management - Research Unit for Water Quality, TU Wien, Karlsplatz 13/226-1, 1040, Vienna, Austria.
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Wang N, Yang W, Wang B, Bai X, Wang X, Xu Q. Predicting maturity and identifying key factors in organic waste composting using machine learning models. BIORESOURCE TECHNOLOGY 2024; 400:130663. [PMID: 38583671 DOI: 10.1016/j.biortech.2024.130663] [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: 01/02/2024] [Revised: 03/15/2024] [Accepted: 04/04/2024] [Indexed: 04/09/2024]
Abstract
The measurement of germination index (GI) in composting is a time-consuming and laborious process. This study employed four machine learning (ML) models, namely Random Forest (RF), Artificial Neural Network (ANN), Support Vector Regression (SVR), and Decision Tree (DT), to predict GI based on key composting parameters. The prediction results showed that the coefficient of determination (R2) for RF (>0.9) and ANN (>0.9) was higher than SVR (<0.6) and DT (<0.8), suggesting that RF and ANN displayed superior predictive performance for GI. The SHapley additive exPlanations value result indicated that composting time, temperature, and pH were the important features contributing to GI. Composting time was found to have the most significant impact on GI. Overall, RF and ANN were suggested as effective tools for predicting GI in composting. This study offers the reliable approach of accurately predicting GI in composting processes, thereby enabling intelligent composting practices.
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Affiliation(s)
- Ning Wang
- Shenzhen Engineering Laboratory for Eco-efficient Recycled Materials, School of Environment and Energy, Peking University, Shenzhen Graduate School, University Town, Xili, Nanshan District, Shenzhen 518055, China
| | - Wanli Yang
- Shenzhen Engineering Laboratory for Eco-efficient Recycled Materials, School of Environment and Energy, Peking University, Shenzhen Graduate School, University Town, Xili, Nanshan District, Shenzhen 518055, China
| | - Bingshu Wang
- School of Software, Northwestern Polytechnical University, Xi'an 710129, China
| | - Xinyue Bai
- Shenzhen Engineering Laboratory for Eco-efficient Recycled Materials, School of Environment and Energy, Peking University, Shenzhen Graduate School, University Town, Xili, Nanshan District, Shenzhen 518055, China
| | - Xinwei Wang
- School of Advanced Materials, Peking University Shenzhen Graduate School, Shenzhen 518055, China
| | - Qiyong Xu
- Shenzhen Engineering Laboratory for Eco-efficient Recycled Materials, School of Environment and Energy, Peking University, Shenzhen Graduate School, University Town, Xili, Nanshan District, Shenzhen 518055, China.
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Tiong YW, Sharma P, Xu S, Bu J, An S, Foo JBL, Wee BK, Wang Y, Lee JTE, Zhang J, He Y, Tong YW. Enhancing sustainable crop cultivation: The impact of renewable soil amendments and digestate fertilizer on crop growth and nutrient composition. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2024; 342:123132. [PMID: 38081377 DOI: 10.1016/j.envpol.2023.123132] [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: 10/01/2023] [Revised: 11/13/2023] [Accepted: 12/07/2023] [Indexed: 01/26/2024]
Abstract
Utilizing digestate as a fertilizer enhances soil nutrient content, improves fertility, and minimizes nutrient runoff, mitigating water pollution risks. This alternative approach replaces commercial fertilizers, thereby reducing their environmental impact and lowering greenhouse gas emissions associated with fertilizer production and landfilling. Herein, this study aimed to evaluate the impact of various soil amendments, including carbon fractions from waste materials (biochar, compost, and cocopeat), and food waste anaerobic digestate application methods on tomato plant growth (Solanum lycopersicum) and soil fertility. The results suggested that incorporating soil amendments (biochar, compost, and cocopeat) into the potting mix alongside digestate application significantly enhances crop yields, with increases ranging from 12.8 to 17.3% compared to treatments without digestate. Moreover, the combination of soil-biochar amendment and digestate application suggested notable improvements in nitrogen levels by 20.3% and phosphorus levels by 14%, surpassing the performance of the those without digestate. Microbial analysis revealed that the soil-biochar amendment significantly enhanced biological nitrification processes, leading to higher nitrogen levels compared to soil-compost and soil-cocopeat amendments, suggesting potential nitrogen availability enhancement within the rhizosphere's ecological system. Chlorophyll content analysis suggested a significant 6.91% increase with biochar and digestate inclusion in the soil, compared to the treatments without digestate. These findings underscore the substantial potential of crop cultivation using soil-biochar amendments in conjunction with organic fertilization through food waste anaerobic digestate, establishing a waste-to-food recycling system.
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Affiliation(s)
- Yong Wei Tiong
- NUS Environmental Research Institute, National University of Singapore, 1 Create Way, 138602, Singapore; Energy and Environmental Sustainability Solutions for Megacities (E2S2) Phase II, Campus for Research Excellence and Technological Enterprise (CREATE), 1 CREATE Way, Singapore, 138602, Singapore
| | - Pooja Sharma
- NUS Environmental Research Institute, National University of Singapore, 1 Create Way, 138602, Singapore; Energy and Environmental Sustainability Solutions for Megacities (E2S2) Phase II, Campus for Research Excellence and Technological Enterprise (CREATE), 1 CREATE Way, Singapore, 138602, Singapore
| | - Shuai Xu
- NUS Environmental Research Institute, National University of Singapore, 1 Create Way, 138602, Singapore; Engineering Research Center of Edible and Medicinal Fungi of Ministry of Education, Jilin Agricultural University, Changchun, Jilin, 130118, China
| | - Jie Bu
- NUS Environmental Research Institute, National University of Singapore, 1 Create Way, 138602, Singapore; Energy and Environmental Sustainability Solutions for Megacities (E2S2) Phase II, Campus for Research Excellence and Technological Enterprise (CREATE), 1 CREATE Way, Singapore, 138602, Singapore
| | - Soobin An
- Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive, 117585, Singapore
| | - Jordan Bao Luo Foo
- Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive, 117585, Singapore
| | - Bryan Kangjie Wee
- Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive, 117585, Singapore
| | - Yueyang Wang
- Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive, 117585, Singapore
| | - Jonathan Tian En Lee
- NUS Environmental Research Institute, National University of Singapore, 1 Create Way, 138602, Singapore; Energy and Environmental Sustainability Solutions for Megacities (E2S2) Phase II, Campus for Research Excellence and Technological Enterprise (CREATE), 1 CREATE Way, Singapore, 138602, Singapore
| | - Jingxin Zhang
- China-UK Low Carbon College, Shanghai Jiao Tong University, Shanghai, 201306, China
| | - Yiliang He
- China-UK Low Carbon College, Shanghai Jiao Tong University, Shanghai, 201306, China; School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Yen Wah Tong
- NUS Environmental Research Institute, National University of Singapore, 1 Create Way, 138602, Singapore; Energy and Environmental Sustainability Solutions for Megacities (E2S2) Phase II, Campus for Research Excellence and Technological Enterprise (CREATE), 1 CREATE Way, Singapore, 138602, Singapore; Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive, 117585, Singapore.
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6
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Karmann C, Mágrová A, Jeníček P, Bartáček J, Kouba V. Advances in nitrogen removal and recovery technologies from reject water: Economic and environmental perspectives. BIORESOURCE TECHNOLOGY 2024; 391:129888. [PMID: 37914052 DOI: 10.1016/j.biortech.2023.129888] [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: 08/07/2023] [Revised: 10/16/2023] [Accepted: 10/16/2023] [Indexed: 11/03/2023]
Abstract
This review critically assesses nitrogen removal technologies applied in the reject water treatment, across different stages of technological development, with a focus on their economic and environmental impacts. The prevalent use of biological processes raises concerns due to potential environmental impacts caused by N2O emissions. However, partial nitritation-anaerobic ammonium oxidation demonstrated economic benefits and the potential for positive environmental outcomes when properly operated and controlled. Furthermore, reject water, in many cases, provides sufficient nitrogen concentrations for nitrogen recovery processes, such as ammonia stripping, substituting production of industrial fertilizers and contributing to a circular economy. Nonetheless, their financial competitiveness is subject to various conditions, including the nitrogen concentration or reject water flow. As the environmental benefits of bioprocesses and economic benefits of nitrogen recovery processes may vary, it is crucial to further optimize both and investigate novel promising technologies such as electrochemical systems, denitrifying anaerobic methane oxidation or direct ammonia oxidation.
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Affiliation(s)
- Christina Karmann
- University of Chemistry and Technology Prague, Technická 5, Prague 166 28, Czech Republic.
| | - Anna Mágrová
- University of Chemistry and Technology Prague, Technická 5, Prague 166 28, Czech Republic.
| | - Pavel Jeníček
- University of Chemistry and Technology Prague, Technická 5, Prague 166 28, Czech Republic.
| | - Jan Bartáček
- University of Chemistry and Technology Prague, Technická 5, Prague 166 28, Czech Republic.
| | - Vojtěch Kouba
- University of Chemistry and Technology Prague, Technická 5, Prague 166 28, Czech Republic.
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7
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Ye M, Li Q, Li YY. Evaluation of anaerobic membrane bioreactor treating dairy processing wastewater: Elemental flow, bioenergy production and reduction of CO 2 emission. BIORESOURCE TECHNOLOGY 2023; 385:129342. [PMID: 37348569 DOI: 10.1016/j.biortech.2023.129342] [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: 04/28/2023] [Revised: 06/12/2023] [Accepted: 06/14/2023] [Indexed: 06/24/2023]
Abstract
The management of dairy processing wastewater (DPW) must address water pollution while delivering renewable energy and recovering resources. A high-rate anaerobic membrane bioreactor (AnMBR) was investigated for treating DPW, and the system was evaluated in terms of elemental flow, nutrient recovery, energy balance, and reduction of CO2 emission. The AnMBR system was superior in terms of both methanogenic performance and efficiency of bioenergy recovery in the DPW treatment, with a high net energy potential of 51.4-53.2 kWh/m3. The theoretical economic values of the digestate (13.8 $/m3) and permeate (4.1 $/m3) were assessed according to nutrient transformation and price of mineral fertilizer. The total CO2 emission equivalent in the AnMBR was 44.7 kg CO2-eq/m3, with a significant reduction of 54.1 kg CO2-eq/m3 compared to the conventional process. The application of the AnMBR in the DPW treatment is a promising approach for the development of carbon neutrality and a circular economy.
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Affiliation(s)
- Min Ye
- Department of Civil and Environmental Engineering, Graduate School of Engineering, Tohoku University, 6-6-06 Aza, Aramaki, Aoba-ku, Sendai, Miyagi 980-8579, Japan
| | - Qian Li
- Department of Civil and Environmental Engineering, Graduate School of Engineering, Tohoku University, 6-6-06 Aza, Aramaki, Aoba-ku, Sendai, Miyagi 980-8579, Japan; Key Lab of Environmental Engineering, Shaanxi Province, Xi'an University of Architecture and Technology, No.13 Yanta Road, Xi'an 710055, PR China
| | - Yu-You Li
- Department of Civil and Environmental Engineering, Graduate School of Engineering, Tohoku University, 6-6-06 Aza, Aramaki, Aoba-ku, Sendai, Miyagi 980-8579, Japan.
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Wang Z, Anand D, He Z. Phosphorus Recovery from Whole Digestate through Electrochemical Leaching and Precipitation. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2023. [PMID: 37364242 DOI: 10.1021/acs.est.3c02843] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/28/2023]
Abstract
Phosphorus (P) recovery from biosolids can play an important role in a circular economy. Herein, an electrochemical phosphorus recovery cell (EPRC) was proposed and examined to recover P from municipal whole digestate via simultaneous leaching and precipitation. The anode of the EPRC released P as aqueous PO43--P through acidification, achieving the highest leaching efficiency of 93.3% under a current density of 30 A m-2. When the leached P solution was treated in the cathode, native metals including Ca and Fe facilitated electrochemically mediated PO43--P precipitation (EMP) and precipitated ∼99% of the leached P in the cathode chamber. Around 54.3-78.7% of total P existed in two harvestable forms: suspended solids in the cathode effluent and immobilized P in the cathode chamber. The solid products contained 28.42-33.51% of P2O5, comparable to the high-grade phosphate rock. Higher current densities reduced cathode scaling and resulted in a lower content of heavy metals in the solid products. An acidic solution was reused three times and effectively maintained cathode performance during a 42-cycle operation, achieving a consistent P recovery efficiency of nearly 80%. Those results have demonstrated the feasibility of the EPRC for recovering P from P-rich solid wastes.
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Affiliation(s)
- Zixuan Wang
- Department of Energy, Environmental & Chemical Engineering, Washington University in St. Louis, St. Louis, Missouri 63130, United States
| | - Daran Anand
- Department of Energy, Environmental & Chemical Engineering, Washington University in St. Louis, St. Louis, Missouri 63130, United States
| | - Zhen He
- Department of Energy, Environmental & Chemical Engineering, Washington University in St. Louis, St. Louis, Missouri 63130, United States
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9
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Cheng B, Wang Y, Zhang D, Wu D, Zan F, Ma J, Miao L, Wang Z, Chen G, Guo G. Thiosulfate pretreatment enhancing short-chain fatty acids production from anaerobic fermentation of waste activated sludge: Performance, metabolic activity and microbial community. WATER RESEARCH 2023; 238:120013. [PMID: 37148694 DOI: 10.1016/j.watres.2023.120013] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2023] [Revised: 04/11/2023] [Accepted: 04/27/2023] [Indexed: 05/08/2023]
Abstract
A novel strategy based on thiosulfate pretreatment for enhancing short-chain fatty acids (SCFAs) from anaerobic fermentation (AF) of waste activated sludge (WAS) was proposed in this study. The results showed that the maximal SCFA yield increased from 206.1 ± 4.7 to 1097.9 ± 17.2 mg COD/L with thiosulfate dosage increasing from 0 to 1000 mg S/L, and sulfur species contribution results revealed that thiosulfate was the leading contributor to improve SCFA yield. Mechanism exploration disclosed that thiosulfate addition largely improved WAS disintegration, due to thiosulfate serving as a cation binder for removing organic-binding cations, especially Ca2+ and Mg2+, dispersing the extracellular polymeric substance (EPS) structure and further entering into the intracellularly by stimulated carrier protein SoxYZ and subsequently caused cell lysis. Typical enzyme activities and related functional gene abundances indicated that both hydrolysis and acidogenesis were remarkably enhanced while methanogenesis was substantially suppressed, which were further strengthened by the enriched hydrolytic bacteria (e.g. C10-SB1A) and acidogenic bacteria (e.g. Aminicenantales) but severely reduced methanogens (e.g. Methanolates and Methanospirillum). Economic analysis confirmed that thiosulfate pretreatment was a cost-effective and efficient strategy. The findings obtained in this work provide a new thought for recovering resource through thiosulfate-assisted WAS AF for sustainable development.
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Affiliation(s)
- Boyi Cheng
- School of Environmental Science and Engineering, Key Laboratory of Water and Wastewater Treatment (HUST), MOHURD, Huazhong University of Science and Technology (HUST), Wuhan 430074, PR China
| | - Yayi Wang
- State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Shanghai Institute of Pollution Control and Ecological Security, Tongji University, Siping Road, Shanghai 200092, PR China
| | - Da Zhang
- School of Environmental Science and Engineering, Key Laboratory of Water and Wastewater Treatment (HUST), MOHURD, Huazhong University of Science and Technology (HUST), Wuhan 430074, PR China
| | - Di Wu
- Centre for Environmental and Energy Research, Department of Green Chemistry and Technology, Ghent University Global Campus, Ghent University, Ghent B9000, Belgium.
| | - Feixiang Zan
- School of Environmental Science and Engineering, Key Laboratory of Water and Wastewater Treatment (HUST), MOHURD, Huazhong University of Science and Technology (HUST), Wuhan 430074, PR China
| | - Jie Ma
- School of Environmental Science and Engineering, Key Laboratory of Water and Wastewater Treatment (HUST), MOHURD, Huazhong University of Science and Technology (HUST), Wuhan 430074, PR China
| | - Lei Miao
- School of Environmental Science and Engineering, Key Laboratory of Water and Wastewater Treatment (HUST), MOHURD, Huazhong University of Science and Technology (HUST), Wuhan 430074, PR China
| | - Zongping Wang
- School of Environmental Science and Engineering, Key Laboratory of Water and Wastewater Treatment (HUST), MOHURD, Huazhong University of Science and Technology (HUST), Wuhan 430074, PR China
| | - Guanghao Chen
- Civil & Environmental Engineering and Hong Kong Branch of the Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, The Hong Kong University of Science and Technology, Hong Kong, PR China
| | - Gang Guo
- School of Environmental Science and Engineering, Key Laboratory of Water and Wastewater Treatment (HUST), MOHURD, Huazhong University of Science and Technology (HUST), Wuhan 430074, PR China.
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