期刊
INTERNATIONAL BIODETERIORATION & BIODEGRADATION
卷 94, 期 -, 页码 128-133出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ibiod.2014.07.004
关键词
Waste activated sludge; Microbial community; SCFAs; Alkaline adjustment; Protease
资金
- National High Technology Research and Development Program of China (863 Program) [2012AA063503-02]
Short chain fatty acids (SCFAs) are value-added products from waste activated sludge (WAS) anaerobic fermentation. The effects of alkaline adjustment, in the range of pH 7-10, on SCFAs accumulation and microbial community of ultrasonic-pretreated WAS at 20 +/- 2 degrees C were investigated in this study. Experimental results indicated that optimum conditions for SCFAs accumulation were pH 9 and fermentation time of 7 days. The changes of protease activity showed that on the initial phase, ultrasonic pretreatment and alkaline adjustment rather than biotic effect was the leading cause of SCFAs improvement at high pHs. DGGE analysis revealed that alkaline adjustment had a strong impact on microbial community. Some bacteria belonged to Firmicutes, Proteobacteria and Bacteroidetes could adapt to high alkaline environments and contribute to proteins and carbohydrates degradation and SCFAs production in the later phase of anaerobic fermentation. (C) 2014 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据