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Enhanced excess sludge hydrolysis and acidification in an activated sludge side-stream reactor process with single-stage sludge alkaline treatment: a pilot scale study
Yan, Peng1,2; Guo, Jin-Song1,2; Wang, Jing3; Ji, Fang-Ying4; Zhang, Cheng-Cheng4; Chen, You-Peng1,2; Shen, Yu1,2
2016-11-01
摘要A pilot-scale side-stream reactor process with single-stage sludge alkaline treatment was employed to systematically investigate characteristics of excess sludge hydrolysis and acidification with alkaline treatment and evaluate feasibility of recovering a carbon source (C-source) from excess sludge to enhance nutrient removal at ambient temperature. The resulting C-source and volatile fatty acid specific yields reached 349.19 mg chemical oxygen demand (COD)/g volatile suspended solids (VSS) d(-1) and 121.3 mg COD/g VSS d(-1), respectively, the process had excellent C-source recovery potential. The propionic-to-acetic acid ratio of the recovered C-source was 3.0 times that in the influent, which beneficially enhanced biological phosphorus removal. Large populations and varieties of hydrolytic acid producing bacteria cooperated with alkaline treatment to accelerate sludge hydrolysis and acidification. Physicochemical characteristics indicated that recovered C-source was derived primarily from extracellular polymeric substances hydrolysis rather than from cells disruption during alkaline treatment. This study showed that excess sludge as carbon source was successfully recycled by alkaline treatment in the process.
关键词Excess sludge Carbon source recovery Alkaline treatment Single-stage Enhanced nutrient removal Pilot-scale
DOI10.1007/s11356-016-7490-7
发表期刊ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
ISSN0944-1344
卷号23期号:22页码:22761-22770
通讯作者Chen, YP ; Shen, Y (reprint author), Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Chongqing 400714, Peoples R China. ; Chen, YP ; Shen, Y (reprint author), Chinese Acad Sci, Key Lab Reservoir Aquat Environm, Chongqing 400714, Peoples R China.
收录类别SCI
WOS记录号WOS:000387602800046
语种英语