Effect of organic loading rate on VFA production, organic matter removal and microbial activity of a two-stage thermophilic anaerobic membrane bioreactor

被引：178
|
作者：
Wijekoon, Kaushalya C. [1 ]
Visvanathan, Chettiyappan [1 ]
Abeynayaka, Amila [1 ]
机构：
[1] Asian Inst Technol, Environm Engn & Management Program, Sch Environm Resources & Dev, Klongluang 12120, Pathumthani, Thailand
来源：
BIORESOURCE TECHNOLOGY | 2011年 / 102卷 / 09期
关键词：
Thermophilic anaerobic; Wastewater treatment; Two stage anaerobic membrane bioreactor; Volatile fatty acids; Biogas; Biological activity;
D O I：
10.1016/j.biortech.2010.12.081
中图分类号：
S2 [农业工程];
学科分类号：
0828 ;
摘要：
This study focused on the VFA (volatile fatty acid) profile variation with organic loading rate (OLR) of a two stage thermophilic anaerobic membrane bioreactor (TAnMBR). The two stage TAnMBR treating high strength molasses-based synthetic wastewater was operated under a side-stream partial sedimentation mode at 55 degrees C. Reactor performances were studied at different OLR ranging from 5 to 12 kg COD m(-3) d(-1). Operational performance of TAnMBR was monitored by assessing biological activity, organic removal efficiency, and VFA. The major intermediate products of anaerobic digestion were identified as acetate, propionate, iso-butyrate, n-butyrate and valerate. Among them acetate and n-butyrate were identified as the most abundant components. Increase of OLR changes the predominant VFA type from acetic acid to n-butyric acid and the total VFA concentration was increased with increased OLR. Moreover, increased OLR increased organic removal efficiency up to second loading rate and dropped in third loading rate while biological activity was increased continuously. (C) 2010 Elsevier Ltd. All rights reserved.
引用
收藏
页码：5353 / 5360
页数：8
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