A COLLABORATIVE TREATMENT PROCESS FOR MUNICIPAL SURPLUS SLUDGE AND THERMAL PRESS FILTRATE FROM CYANOBACTERIAL SLUDGE

ZHANG Yefan; ZHENG Zhiyong; CAO Qihao; ZHU Fukang; PAN Hui; LI Chong; YANG Hanwen; LIU He

doi:10.13205/j.hjgc.202302004

Volume 41 Issue 2

Feb. 2023

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2023 > 41(2): 24-29

ZHANG Yefan, ZHENG Zhiyong, CAO Qihao, ZHU Fukang, PAN Hui, LI Chong, YANG Hanwen, LIU He. A COLLABORATIVE TREATMENT PROCESS FOR MUNICIPAL SURPLUS SLUDGE AND THERMAL PRESS FILTRATE FROM CYANOBACTERIAL SLUDGE[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(2): 24-29. doi: 10.13205/j.hjgc.202302004

Citation:

ZHANG Yefan, ZHENG Zhiyong, CAO Qihao, ZHU Fukang, PAN Hui, LI Chong, YANG Hanwen, LIU He. A COLLABORATIVE TREATMENT PROCESS FOR MUNICIPAL SURPLUS SLUDGE AND THERMAL PRESS FILTRATE FROM CYANOBACTERIAL SLUDGE[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(2): 24-29. doi: 10.13205/j.hjgc.202302004

Citation:

ZHANG Yefan, ZHENG Zhiyong, CAO Qihao, ZHU Fukang, PAN Hui, LI Chong, YANG Hanwen, LIU He. A COLLABORATIVE TREATMENT PROCESS FOR MUNICIPAL SURPLUS SLUDGE AND THERMAL PRESS FILTRATE FROM CYANOBACTERIAL SLUDGE[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(2): 24-29. doi: 10.13205/j.hjgc.202302004

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A COLLABORATIVE TREATMENT PROCESS FOR MUNICIPAL SURPLUS SLUDGE AND THERMAL PRESS FILTRATE FROM CYANOBACTERIAL SLUDGE

doi: 10.13205/j.hjgc.202302004

1. Jiangsu Key Laboratory of Anaerobic Biotechnology, School of Environmental and Civil Engineering, Jiangnan University, Wuxi 214122, China;
2. Wuxi Guolian Environmental Protection Technology Co., Ltd, Wuxi 214131, China;
3. Jiangsu Collaborative Innovation Center of Water Treatment Technology & Material, Suzhou 215009, China

Received Date: 2021-12-21
Available Online: 2023-05-25
Publish Date: 2023-02-01

Abstract

Abstract

To solve the problem of high treatment cost of cyanobacterial sludge and fewer recycling procedures, a collaborative process of the filtrate and municipal surplus sludge was explored based on deep dewatering by thermal press filtration. The thermal press filtrate from the cyanobacterial sludge was reused to dilute the municipal surplus sludge for its deep dewatering. The dewatering performance of the thermal press filtrate on the municipal surplus sludge at various pH conditions, and the resulting pollutants' concentrations in the municipal sludge filtrate were investigated. The result showed that the ferric ions in the filtrate of the cyanobacterial sludge by thermal press filtration were conducive to the deep dewatering of municipal surplus sludge. The optimal condition for the thermal press filtrate to be reused and diluted for municipal surplus sludge dewatering was to adjust the pH value to 7 with calcium oxide, and then mixed it with the municipal surplus sludge. In this way, the dosage of chemicals for the collaborative treatment process could be reduced by 68.1%. Compared with the conventional municipal sludge treatment process, the filtrate volume was reduced by 45% and the total unit cost was decreased by 16.6%. The collaborative treatment process would promote the economic treatment of cyanobacterial sludge and expand the recycling methods.
- cyanobacterial sludge,
- thermal press filtrate,
- municipal surplus sludge,
- deep dewatering,
- collaborative treatment process

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References(23)

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