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Effect of solids retention time and temperature on waste activated sludge hydrolysis and short-chain fatty acids accumulation under alkaline conditions in continuous-flow reactors

被引：92
作者：
Feng, Leiyu [1 ]
Wang, Hua [1 ]
Chen, Yinguang [1 ]
Wang, Qin [1 ]
机构：
[1] Tongji Univ, Sch Environm Sci & Engn, State Key Lab Pollut Control & Resources Reuse, Shanghai 200092, Peoples R China
来源：
BIORESOURCE TECHNOLOGY | 2009年 / 100卷 / 01期
基金：
美国国家科学基金会;
关键词：
Waste activated sludge (WAS); Short-chain fatty acids (SCFAs); Accumulation; Solids retention time (SRT); Temperature; BIOLOGICAL PHOSPHORUS REMOVAL; ANAEROBIC-DIGESTION; WATER; FERMENTATION; ACIDOGENESIS; MUNICIPAL; PHASE; CRYSTALLIZATION; SOLUBILIZATION; ACIDIFICATION;
D O I：
10.1016/j.biortech.2008.05.028
中图分类号：
S2 [农业工程];
学科分类号：
0828 ;
摘要：
The effects of solids retention time (SRT) and temperature on waste activated sludge (WAS) hydrolysis and short-chain fatty acids (SCFAs) accumulation were investigated in a series of continuous-flow reactors at pH 10. The experimental results showed that the increase of either SRT or temperature benefited the hydrolysis of WAS and the production of SCFAs. The changes in SRT gave also impact on the percentage of acetic and propionic acids in the fermentative SCFAs, but little influence on that of the slightly long-chain SCFAs, such as n-butyric, iso-butyric, n-valeric and iso-valeric acids. Compared with the control (pH unadjusted) experiment, at SRT of 12 d and temperature of 20 degrees C the concentration of SCFAs produced at pH 10 increased from 261.2 to 933.5 mg COD/L, and the propionic acid percentage improved from 11.7 to 16.0%. It can be concluded from this investigation that the efficient continuous production of SCFAs at pH 10 is feasible. (c) 2008 Elsevier Ltd. All rights reserved.
引用
收藏
页码：44 / 49
页数：6
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