Methane production and microbial community structure for alkaline pretreated waste activated sludge

被引：0

作者：

Sun, Rui ^{[1
]}

Xing, Defeng ^{[1
]}

Jia, Jianna ^{[1
]}

Zhou, Aijuan ^{[1
]}

Zhang, Lu ^{[1
]}

Ren, Nanqi ^{[1
]}

机构：

[1] State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China

来源：

Bioresource Technology | 2014年 / 169卷

基金：

中国国家自然科学基金;

关键词：

RNA - Alkalinity - Methane - Sludge digestion - Microorganisms;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

Alkaline pretreatment was studied to analyze the influence on waste activated sludge (WAS) reduction, methane production and microbial community structure during anaerobic digestion. Methane production from alkaline pretreated sludge (A-WAS) (pH. = 12) increased from 251.2. mL/L. d to 362.2. mL/L. d with the methane content of 68.7% compared to raw sludge (R-WAS). Sludge reduction had been improved, and volatile suspended solids (VSS) removal rate and protein reduction had increased by ~10% and ~35%, respectively. The bacterial and methanogenic communities were analyzed using 454 pyrosequencing and clone libraries of 16S rRNA gene. Remarkable shifts were observed in microbial community structures after alkaline pretreatment, especially for Archaea. The dominant methanogenic population changed from Methanosaeta for R-WAS to Methanosarcina for A-WAS. In addition to the enhancement of solubilization and hydrolysis of anaerobic digestion of WAS, alkaline pretreatment showed significant impacts on the enrichment and syntrophic interactions between microbial communities. © 2014 Elsevier Ltd.

引用

页码：496 / 501