Production of polyhydroxyalkanoates (PHA) by activated sludge treating municipal wastewater: effect of pH, sludge retention time (SRT), and acetate concentration in influent

被引：201

作者：

Chua, ASM

Takabatake, H

Satoh, H

Mino, T

机构：

[1] Univ Tokyo, Grad Sch Frontier Sci, Inst Environm Studies, Bunkyo Ku, Tokyo 1130033, Japan

[2] Tohoku Univ, Fac Engn, Dept Civil Engn, Sendai, Miyagi 980, Japan

来源：

WATER RESEARCH | 2003年 / 37卷 / 15期

关键词：

activated sludge; polyhydroxyalkanoates (PHA); anaerobic-aerobic process; acetate; pH; sludge retention time (SRT);

D O I：

10.1016/S0043-1354(03)00252-5

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

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. (C) 2003 Elsevier Science Ltd. All rights reserved.

引用

页码：3602 / 3611

页数：10

共 29 条

[1] Polyhydroxyalkanoates, biopolyesters from renewable resources: Physiological and engineering aspects [J].