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Xia J, Ji J, Hu Z, Rao T, Liu A, Ma J, Sun Y. Application of Advanced Oxidation Technology in Sludge Conditioning and Dewatering: A Critical Review. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:ijerph19159287. [PMID: 35954642 PMCID: PMC9368043 DOI: 10.3390/ijerph19159287] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/09/2022] [Revised: 07/22/2022] [Accepted: 07/26/2022] [Indexed: 02/04/2023]
Abstract
Sludge dewatering is an important link in sludge treatment. In practical engineering, the dewatering effect of unconditioned sludge is very poor. The use of advanced oxidation technology can improve sludge dewatering performance, reduce sludge capacity, and remove micro-pollutants, which is beneficial for sludge post-treatment and disposal. Based on the current status of sludge conditioning and dehydration, the characteristics of the advanced oxidation method for sludge dehydration were systematically explained using various free radical reaction mechanisms and dehydration conditions. The effects of various advanced oxidation technologies on sludge conditioning and dewatering has been extensively discussed. Finally, the application prospects of the advanced oxidation technology in sludge conditioning and dewatering are presented.
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Affiliation(s)
- Jiahua Xia
- Nanjing Jiangbei New Area Public Utilities Holding Group Co., Ltd., Nanjing 210044, China; (J.X.); (J.J.); (Z.H.); (T.R.)
| | - Juan Ji
- Nanjing Jiangbei New Area Public Utilities Holding Group Co., Ltd., Nanjing 210044, China; (J.X.); (J.J.); (Z.H.); (T.R.)
| | - Zhiqiang Hu
- Nanjing Jiangbei New Area Public Utilities Holding Group Co., Ltd., Nanjing 210044, China; (J.X.); (J.J.); (Z.H.); (T.R.)
| | - Ting Rao
- Nanjing Jiangbei New Area Public Utilities Holding Group Co., Ltd., Nanjing 210044, China; (J.X.); (J.J.); (Z.H.); (T.R.)
| | - Ankang Liu
- Nanjing Water Purification Environmental Research Institute Co., Ltd., Nanjing 211100, China;
| | - Jingqian Ma
- College of Urban Construction, Nanjing Tech University, Nanjing 211800, China;
| | - Yongjun Sun
- College of Urban Construction, Nanjing Tech University, Nanjing 211800, China;
- Correspondence:
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Tang X, Wen Y, He Y, Jiang H, Dai X, Bi X, Wagner M, Chen H. Full-scale semi-centralized wastewater treatment facilities for resource recovery: operation, problems and resolutions. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2020; 82:303-314. [PMID: 32941172 DOI: 10.2166/wst.2020.169] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The first full-scale semi-centralized wastewater treatment and resource recovery system based on source separation was implemented from 2014. To assess the operation performance, operating costs and resolve the problems faced in this system, the latest operation data from April 2017 to September 2018 was investigated. The results show that greywater and blackwater modules exhibited good removal performance for organics and nutrients, although misconnection between pipelines existed and influent loading rates fluctuated. The effluent could meet reuse standards. The biogas production rates of raw sludge could reach 7.27-10.9 m3 gas·per cubic raw sludge. The specific cost of treated water was higher than in a conventional treatment system. Power consumption made a major contribution to the total cost with a proportion of 55.3-94.2%. After optimizing and considering the comprehensive efficiencies, the costs would be affordable. The dewatered sludge of the anaerobic digestion module has been applied to agricultural and landscaping soil. It is suggested that organics in blackwater could be recovered as volatile fatty acids with high-efficiency anaerobic fermentation and used as an external carbon source for short-cut biological nitrogen removal. In conclusion, the semi-centralized system will be a feasible and sustainable alternative for conventional treatment systems in future.
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Affiliation(s)
- Xianchun Tang
- State Key Laboratory of Pollution Control and Resource Recovery, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China E-mail:
| | - Yexuan Wen
- State Key Laboratory of Pollution Control and Resource Recovery, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China E-mail:
| | - Yi He
- State Key Laboratory of Pollution Control and Resource Recovery, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China E-mail:
| | - Haixin Jiang
- State Key Laboratory of Pollution Control and Resource Recovery, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China E-mail:
| | - Xiaohu Dai
- State Key Laboratory of Pollution Control and Resource Recovery, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China E-mail:
| | - Xuejun Bi
- School of Environmental and Municipal Engineering, Qingdao University of Technology, 11 Fushun Road, Qingdao 266033, China
| | - Martin Wagner
- Wastewater Technology and Water Reuse, Technische Universität Darmstadt, Franziska-Braun-Str. 7, 64287 Darmstadt, Germany
| | - Hongbin Chen
- State Key Laboratory of Pollution Control and Resource Recovery, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China E-mail:
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