Enhanced hydrogen production in microbial electrolysis through strategies of carbon recovery from alkaline/thermal treated sludge  

作　　者：Ling Wang Chunxue Yang Sangeetha Thangavel Zechong Guo Chuan Chen Aijie Wang Wenzong Liu 

机构地区：[1]State Key Laboratory of Urban Water Resource and Environment,Harbin Institute of Technology,Harbin,150001,China [2]Heilongjiang Cold Region Wetland Ecology and Environment Research Key Laboratory,School of Geography and Tourism,Harbin University,Harbin,150086,China [3]Department of Energy and Refrigerating Air-Conditioning Engineering,Taipei University of Technology,Taipei,10608,China [4]School of Environmental and Chemical Engineering,Jiangsu University of Science and Technology,Zhenjiang,212013,China [5]School of Civil and Environmental Engineering,Harbin Institute of Technology Shenzhen,Shenzhen,518055,China

出　　处：《Frontiers of Environmental Science & Engineering》2021年第4期121-130,共10页环境科学与工程前沿（英文）

基　　金：This research was supported by the National Natural Science Foundation of China(Grant No.51778607);and the Natural Science Fundation of Heilongjiang Province,China(No.LH2019E071).

摘　　要：The aim of this study was to investigate the biohydrogen production from thermal(T),alkaline(A)or thermal-alkaline(TA)pretreated sludge fermentation liquid(SFL)in a microbial electrolysis cells(MECs)without buffer addition.Highest hydrogen yield of 36.87±4.36 mgH_(2)/gVSS(0.026 m^(3)/kg COD)was achieved in TA pretreated SFL separated by centrifugation,which was 5.12,2.35 and 43.25 times higher than that of individual alkaline,thermal pretreatment and raw sludge,respectively.Separating SFL from sludge by centrifugation eliminated the negative effects of particulate matters,was more conducive for hydrogen production than filtration.The accumulated short chain fatty acid(SCFAs)after pretreatments were the main substrates for MEC hydrogen production.The maximum utilization ratio of acetic acid,propionic acid and n-butyric acid was 93.69%,90.72%and 91.85%,respectively.These results revealed that pretreated WAS was highly efficient to stimulate the accumulation of SCFAs.And the characteristics and cascade bioconversion of complex substrates were the main factor that determined the energy efficiency and hydrogen conversion rate of MECs.

关 键 词：Waste activated sludge(WAS) Short chain fatty acids(SCFAs) Hydrogen PRETREATMENT Microbial electrolysis cells(MECs) 

分 类 号：X703[环境科学与工程—环境工程]