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Production of polyhydroxybutyrate by activated sludge performing enhanced biological phosphorus removal.

机构信息

Civil Engineering, College of Engineering and Informatics, National University of Ireland, Galway, Ireland.

出版信息

Bioresour Technol. 2010 Feb;101(3):1049-53. doi: 10.1016/j.biortech.2009.08.107. Epub 2009 Sep 17.

DOI:10.1016/j.biortech.2009.08.107

PMID:19765985

Abstract

In this study, polyhydroxybutyrate (PHB)--a biodegradable plastics material--was produced by activated sludge performing enhanced biological phosphorus removal (EBPR) in batch experiments under anaerobic, aerobic and anaerobic/aerobic conditions. Under anaerobic conditions, the maximum PHB content of the dry biomass was 28.8% by weight, while under aerobic or anaerobic/aerobic conditions, the maximum PHB content was about 50%. The PHB production rate with respect to the volatile suspended solids (VSS) was: (i) 70 mg/(g VSS)h under aerobic conditions that followed anaerobic conditions, (ii) 156 mg/(g VSS)h under anaerobic condition, and (iii) 200mg/(g VSS)h under aerobic conditions with energy also supplied from polyphosphate. A side stream, with initially anaerobic conditions for PHB accumulation and phosphorus release, and then aerobic conditions for PHB accumulation, was proposed. In this side stream, biomass with a high PHB content and a high PHB production rate could be both achieved.

摘要

在这项研究中，通过在厌氧、好氧和厌氧/好氧条件下进行的批实验，利用活性污泥进行强化生物除磷（EBPR）来生产聚羟基丁酸酯（PHB）——一种可生物降解的塑料材料。在厌氧条件下，干生物质中 PHB 的最大含量为 28.8%（按重量计），而在好氧或厌氧/好氧条件下，PHB 的最大含量约为 50%。相对于挥发性悬浮固体（VSS）的 PHB 生成率为：（i）在继厌氧条件之后的好氧条件下为 70mg/（g VSS）h，（ii）在厌氧条件下为 156mg/（g VSS）h，以及（iii）在有氧条件下为 200mg/（g VSS）h，同时还从多磷酸盐中获得能量。提出了一种侧流，最初在 PHB 积累和磷释放的厌氧条件下，然后在 PHB 积累的好氧条件下。在这个侧流中，可以同时实现具有高 PHB 含量和高 PHB 生成率的生物质。