首页|Carbon source recovery from waste sludge reduces greenhouse gas emissions in a pilot-scale industrial wastewater treatment plant

Carbon source recovery from waste sludge reduces greenhouse gas emissions in a pilot-scale industrial wastewater treatment plant

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Carbon cycle regulation and greenhouse gas(GHG)emission abatement within wastewater treatment plants(WWTPs)can theoretically improve sustainability.Currently,however,large amounts of external carbon sources used for deep nitrogen removal and waste sludge disposal aggravate the carbon footprint of most WWTPs.In this pilot-scale study,considerable carbon was preliminarily recovered from primary sludge(PS)through short-term(five days)acidogenic fermentation and subsequently utilized on-site for denitrification in a wool processing industrial WWTP.The recovered sludge-derived carbon sources were excellent electron donors that could be used as additional carbon supplements for commercial glucose to enhance denitrification.Additionally,improvements in carbon and nitrogen flow further contributed to GHG emission abatement.Overall,a 9.1％reduction in sludge volatile solids was achieved from carbon recovery,which offset 57.4％of external carbon sources,and the indirect GHG emissions of the target industrial WWTP were reduced by 8.05％.This study demonstrates that optimizing the allocation of carbon mass flow within a WWTP has numerous benefits.

Carbon neutralizationResource recoveryAnaerobic fermentationSludge reductionPilot-scale study

Jiawen Xie、Xingchen Zhuge、Xixi Liu、Qian Zhang、Yiwen Liu、Peizhe Sun、Yingxin Zhao、Yindong Tong、Hongcheng Wang、Aijie Wang

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School of Environmental Science and Engineering,Tianjin University,Tianjin,300072,China

Robert M.Buchan Department of Mining,Queen's University,Kingston,K7L 3N6,Canada

School of Science,Tibet University,Lhasa,850012,China

State Key Laboratory of Urban Water Resource and Environment,Harbin Institute of Technology(Shenzhen),Shenzhen,518055,PR China

CAS Key Laboratory of Environmental Biotechnology,Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing,100085,PR China

University of Chinese Academy of Sciences,Beijing,100049,PR China

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Key Research and Development Project of Shandong Province,ChinaState Key Laboratory of Urban Water Resources and Environment(Harbin Institute of Technology),ChinaShenzhen Science and Technology Innovation Program,China

2020CXGC011202-0042022TS26KQTD20190929172630447

2023

环境科学与生态技术(英文)

环境科学与生态技术(英文)

ISSN：
年,卷(期)：2023.14(4)
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