连续流反应器中污泥停留时间对剩余污泥碱性厌氧发酵生产短链脂肪酸的影响  

Effect of solids retention time on short-chain fatty acids production from waste activated sludge under alkaline conditions in continuous flow reactors

作　　者：黄达然[1] 冯雷雨[1] 陈银广[1] 王琴[1] 

机构地区：[1]同济大学环境科学与工程学院,污染控制与资源化研究国家重点实验室,上海200092

出　　处：《环境污染与防治》2008年第10期16-19,共4页Environmental Pollution & Control

基　　金：国家“863计划”项目(No.2007AA06Z326);国家自然科学基金资助项目(No.50678125);新世纪优秀人才支持计划项目(No.NCET-06-0373)

摘　　要：在pH=10条件下,研究了连续流反应器中不同污泥停留时间(SRT)对剩余污泥厌氧发酵生产短链脂肪酸(SCFAs)的影响。结果表明,SRT在一定范围内延长有利于SCFAs产量的提高。不同SRT对乙酸和丙酸在SCFAs中所占比例也有一定的影响,但对其他脂肪酸影响甚微。在pH=10和SRT=12d条件下,SCFAs的产量约为空白试验(不调节pH,SRT为12d)的3.6倍;丙酸在SCFAs中的质量分数由11.7%上升到16.0%。对碱性条件下SRT影响剩余污泥生产SCFAs的原因进行了探讨。The effect of solids retention time （SRT） on short-chain fatty acids （SCFAs） production from waste activated sludge （WAS） was investigated in a series of continuou-flow reactors at pH 10. The experimental results showed that the increase of SRT in a certain range benefited production of SCFAs from WAS. The changes of SRT gave also impact on the percentage of acetic and propionic acids in the fermentative SCFAs, but little influence on that of the other SCFAs. The SCFAs production obtained at pH 10 and SRT 12 d was almost three times of that in the blank test （SRT 12 d, no pH adjustment） and the propionic acid percentage improved from 11.7G to 16.0%. The reasons for SCFAs production from WAS at pH 10 were investigated.

关 键 词：剩余污泥 连续流反应器 短链脂肪酸(SCFAs) 污泥停留时间(SRT) 水解 

分 类 号：X703[环境科学与工程—环境工程] TQ465.5[化学工程—制药化工]