羟基烷酸
活性污泥
废水
化学
制浆造纸工业
混合液悬浮物
污水处理
序批式反应器
废物管理
细菌
生物
遗传学
工程类
作者
Adeline Seak May Chua,Hiroo Takabatake,Hiroyasu Satoh,Takashi Mino
出处
期刊:Water Research
[Elsevier]
日期:2003-09-01
卷期号:37 (15): 3602-3611
被引量:229
标识
DOI:10.1016/s0043-1354(03)00252-5
摘要
In this paper, the production of biodegradable plastics polyhydroxyalkanoates (PHA) by activated sludge treating municipal wastewater was investigated. The effect of three operational factors, i.e. the acetate concentration in influent, pH, and sludge retention time (SRT) were studied. Sludge acclimatized with municipal wastewater supplemented with acetate could accumulate PHA up to 30% of sludge dry weight, while sludge acclimatized with only municipal wastewater achieved 20% of sludge dry weight. It was found that activated sludge with an SRT of 3 days possessed better PHA production capability than sludge with an SRT of 10 days. Sludge acclimatized under pH 7 and 8 conditions in sequencing batch reactors (SBRs) exhibited similar PHA production capability. However, in PHA production batch experiments, pH value influenced significantly the PHA accumulation behavior of activated sludge. When pH of batch experiments was controlled at 6 or 7, a very low PHA production was observed. The production of PHA was stimulated when pH was kept at 8 or 9.
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