膜科学与技术

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Effect of EPS components on membrane fouling in the treatment of livestock and poultry breeding wastewater

Authors： XIN Jiaqi，ZHUO Mengqiong, SUN Shengjin, GUO Yuantao, XIAO Congliang, FANG Fan, LI Kun

Units： School of Resources Environmental＆ Chemical Engineering Nanchang University，Key Laboratory of Poyang Lake Environment and Resources Utilization, Ministry of Education，Nanchang 330038，China

KeyWords： algae-bacteria symbionts, ultrafiltration, membrane fouling, extracellular polymeric substance

ClassificationCode：X703

year,volume(issue):pagination： 2021,41(2):63-70

Abstract：

The EPS secreted by microbes could cause complicated membrane fouling conditions. To further explore the influence of EPS secreted by the algae and bacteria symbionts treating livestock and poultry breeding wastewater on the membrane fouling conditions, the EPS produced by the algae and bacteria symbionts was collected, separated and divided into four components: soluble microbial products (SMP), loosely bound extracellular polymeric substances (LB-EPS), tightly bound extracellular polymeric substances (TB-EPS) and microbial floc residue (MFR) after EPS extraction, to study the influence of different extracellular polymeric substances (EPS) components on membrane fouling. Experimental results show that the membrane fouling caused by SMP is the most serious, followed by MFR. The linear fitting results show that SMP and LB-EPS are mainly standard blocking, MFR is mainly filter cake layer blocking and intermediate blocking, and TB-EPS is composed of four blocking models, which are more complicated. The pollutant composition analysis results show that the main organic matter causing membrane fouling are polysaccharides and protein substances.

Funds：

国家自然科学基金（51768043）；中国博士后科学基金（2017M622106）；江西省博士后研究人员科研项目（2019KY23）；江西省青年科学基金（20171BAB216037）

AuthorIntro：

辛佳期（1996-），女，江西进贤，硕士研究生，主要研究方向为废水资源化的膜污染，E-mail: 1053125199@qq.com

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