活性污泥处理城市污水生产聚羟基脂肪酸酯（PHA）：pH值、污泥停留时间（SRT）和进水乙酸盐浓度的影响。

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

作者信息

Chua Adeline S M, Takabatake Hiroo, Satoh Hiroyasu, Mino Takashi

机构信息

Institute of Environmental Studies, Graduate School of Frontier Sciences, The University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.

出版信息

Water Res. 2003 Sep;37(15):3602-11. doi: 10.1016/S0043-1354(03)00252-5.

DOI:10.1016/S0043-1354(03)00252-5

PMID:12867326

Abstract

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.

摘要

本文研究了活性污泥处理城市污水生产可生物降解塑料聚羟基脂肪酸酯（PHA）的情况。研究了进水乙酸盐浓度、pH值和污泥停留时间（SRT）这三个运行因素的影响。用添加了乙酸盐的城市污水驯化的污泥可积累高达污泥干重30%的PHA，而仅用城市污水驯化的污泥积累量为污泥干重的20%。结果发现，污泥停留时间为3天的活性污泥比污泥停留时间为10天的污泥具有更好的PHA生产能力。在序批式反应器（SBR）中，在pH值为7和8的条件下驯化的污泥表现出相似的PHA生产能力。然而，在PHA生产批次实验中，pH值显著影响活性污泥的PHA积累行为。当批次实验的pH值控制在6或7时，观察到PHA产量非常低。当pH值保持在8或9时，PHA的产量会受到刺激。