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

作　　者：Qiandi Wang Xiqi Li Wenzong Liu Siyuan Zhai Qiongying Xu Chang'an Huan Shichen Nie Qinghua Ouyang Hongcheng Wang Aijie Wang 

机构地区：[1]CAS Key Laboratory of Environmental Biotechnology,Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing,100085,PR China [2]University of Chinese Academy of Sciences,Beijing,100049,PR China [3]State Key Laboratory of Urban Water Resource and Environment,Harbin Institute of Technology(Shenzhen),Shenzhen,518055,PR China [4]State Key Laboratory of Urban Water Resource and Environment,School of Environment,Harbin Institute of Technology,Harbin,150090,PR China [5]Shandong Shenshui Hynar Water Environmental Protection Co.,Ltd.,Shandong,274000,PR China [6]Shenshui Hynar Water Group Co.,Ltd.,Shenzhen,518055,PR China

出　　处：《Environmental Science and Ecotechnology》2023年第2期106-113,共8页环境科学与生态技术（英文）

基　　金：supported by the Key Research and Development Project of Shandong Province,China(2020CXGC011202-004);the State Key Laboratory of Urban Water Resources and Environment(Harbin Institute of Technology),China(No.2022TS26);the Shenzhen Science and Technology Innovation Program,China(KQTD20190929172630447).

摘　　要：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 industrialWWTP.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.

关 键 词：Carbon neutralization Resource recovery Anaerobic fermentation Sludge reduction Pilot-scale study 

分 类 号：X703[环境科学与工程—环境工程]