从传统活性污泥法和氧化沟工艺中获得的活性污泥的脂质增强。

Lipid-enhancement of activated sludges obtained from conventional activated sludge and oxidation ditch processes.

机构信息

Renewable Fuels and Chemicals Laboratory, Dave C. Swalm School of Chemical Engineering, Mail Stop 9595, Mississippi State University, MS 39762, USA.

出版信息

Bioresour Technol. 2013 Nov;148:487-93. doi: 10.1016/j.biortech.2013.08.158. Epub 2013 Sep 5.

DOI:10.1016/j.biortech.2013.08.158

PMID:24077159

Abstract

Lipid-enhancement of activated sludges was conducted to increase the amount of saponifiable lipids in the sludges. The sludges were obtained from a conventional activated sludge (CAS) and an oxidation ditch process (ODP). Results showed 59-222% and 150-250% increase in saponifiable lipid content of the sludges from CAS and ODP, respectively. The fatty acid methyl ester (FAMEs) obtained from triacylglycerides was 57-67% (of total FAMEs) for enhanced CAS and 55-73% for enhanced ODP, a very significant improvement from 6% to 10% (CAS) and 4% to 8% (ODP). Regardless of the source, the enhancement resulted in sludges with similar fatty acid profile indicating homogenization of the lipids in the sludges. This study provides a potential strategy to utilize existing wastewater treatment facilities as source of significant amount of lipids for biofuel applications.

摘要

采用富脂法提高活性污泥中的可皂化脂质含量。实验所用的活性污泥取自传统活性污泥法（CAS）和氧化沟工艺（ODP）。结果表明，CAS 和 ODP 的可皂化脂质含量分别提高了 59%-222%和 150%-250%。从三酰基甘油中提取的脂肪酸甲酯（FAMEs）占增强型 CAS 和 ODP 总 FAMEs 的 57%-67%，这一比例较 CAS 的 6%-10%和 ODP 的 4%-8%有显著提高。无论来源如何，强化处理后的污泥均具有相似的脂肪酸组成，表明污泥中的脂质得到了均匀化。本研究为利用现有的废水处理设施作为生物燃料应用中大量脂质的潜在来源提供了一种策略。