Membrane fouling mitigation in a moving bed membrane bioreactor combined with anoxic biofilter for treatment of saline wastewater from mariculture

被引：29
作者：
Song, Weilong [1 ]
You, Hong [1 ,2 ]
Li, Zhipeng [2 ]
Liu, Feng [1 ,2 ]
Qi, Peishi [1 ]
Wang, Fang [2 ]
Li, Yizhu [2 ]
机构：
[1] Harbin Inst Technol, Sch Municipal & Environm Engn, State Key Lab Urban Water Resource & Environm, Harbin 150090, Heilongjiang, Peoples R China
[2] Harbin Inst Technol Weihai, Sch Marine Sci & Technol, Weihai 264209, Peoples R China
来源：
BIORESOURCE TECHNOLOGY | 2017年 / 243卷
关键词：
Pre-positioned anoxic biofilter; Moving bed membrane bioreactor; Saline wastewater; Membrane fouling mitigation; Mariculture; SOLUBLE MICROBIAL PRODUCTS; SLUDGE CHARACTERISTICS; ACTIVATED-SLUDGE; CAKE LAYER; REACTOR; MBR; SUBSTANCES; BIOMASS; SALT; MICROFILTRATION;
D O I：
10.1016/j.biortech.2017.07.092
中图分类号：
S2 [农业工程];
学科分类号：
0828 ;
摘要：
Membrane fouling mitigation in a novel AF-MBMBR system (moving bed membrane bioreactor (10 L) coupled with anoxic biofilter (4 L)) under high salinity condition (35%) was systematically investigated. Pre-positioned AF served as a pretreatment induced significant decrease of suspended biomass by 85% and dissolved organic matters by 51.7% in subsequent MBR, which resulted in a reduction of cake layer formation. Based on this, sponge bio-carriers in MBMBR further alleviated the fouling propensity by modifying extracellular polymeric substances (EPS) properties. The protein component in EPS decreased from 181.4 to 116.5 mg/g MLSS, with a decline of protein/carbohydrate ratio from 4.6 to 3.4. In particular, elimination of hydrophobic groups like aromatic protein-like substance in EPS was detected. These caused the less biomass deposition on membrane surface, thereby alleviating membrane fouling. In summary, mitigation of membrane fouling in AF-MBMBR should be attributed to contributions from both pre-positioned AF and sponge bio-carriers. (C) 2017 Elsevier Ltd. All rights reserved.
引用
收藏
页码：1051 / 1058
页数：8
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