Effects of salinity on the characteristics of biomass and membrane fouling in membrane bioreactors

被引：149
|
作者：
Jang, Duksoo [1 ]
Hwang, Yuhoon [1 ,2 ]
Shin, Hangsik [1 ]
Lee, Wontae [3 ]
机构：
[1] Korea Adv Inst Sci & Technol, Dept Civil & Environm Engn, Taejon 305701, South Korea
[2] Tech Univ Denmark, Dept Environm Engn, DK-2800 Lyngby, Denmark
[3] Kumoh Natl Inst Technol, Sch Civil & Environm Engn, Gyeongbuk 730701, South Korea
来源：
BIORESOURCE TECHNOLOGY | 2013年 / 141卷
基金：
新加坡国家研究基金会;
关键词：
Salinity; Membrane fouling; Membrane bioreactor; Biomass characteristics; PCR-DGGE; ACTIVATED-SLUDGE; WASTE-WATER; SALT;
D O I：
10.1016/j.biortech.2013.02.062
中图分类号：
S2 [农业工程];
学科分类号：
0828 ;
摘要：
This study investigated the effects of high salinity on the performance and membrane fouling of membrane bioreactor (MBR) with saline wastewater. Synthetic wastewaters containing 5-20 g/L salts (NaCl) were treated in identical lab-scale (7 L) MBRs monitoring removals of dissolved organic carbon (DOC) and ammonia. Increase in salt concentrations did not significantly change the removal efficiency of DOC in the MBRs. However, the ammonia removals decreased from 87% to 46% with increasing salt concentrations. PCR-DGGE analysis indicated changes in the microbial communities' composition due to high salinity; and the changes in microbial composition in turn have affected the performance of the MBRs. Membrane fouling was accelerated by the increased pore blocking resistance at higher salt concentrations. Analysis results of physicochemical and biological characteristics of biomass (EPS, floc size, zeta potential) verified the impacts of high salinity on the increased membrane fouling. (C) 2013 Elsevier Ltd. All rights reserved.
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页码：50 / 56
页数：7
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