New insight into fouling behavior and foulants accumulation property of cake sludge in a full-scale membrane bioreactor

被引：53
作者：
Hu, Yisong [1 ]
Wang, Xiaochang C. [1 ]
Yu, ZhenZhen [1 ]
Ngo, Huu Hao [2 ]
Sun, Qiyuan [1 ]
Zhang, Qionghua [1 ]
机构：
[1] Xian Univ Architecture & Technol, Key Lab Northwest Water Resource Environm & Ecol, MOE, Xian 710055, Peoples R China
[2] Univ Technol Sydney, Sch Civil & Environm Engn, Ctr Technol Water & Wastewater, Sydney, NSW 2007, Australia
来源：
JOURNAL OF MEMBRANE SCIENCE | 2016年 / 510卷
基金：
中国国家自然科学基金;
关键词：
Full-scale membrane bioreactor; Cake sludge; Fouling behavior; Extracellular polymeric substances; Microbial community structure; SUBCRITICAL FLUX OPERATION; DISSOLVED ORGANIC-MATTER; MUNICIPAL WASTE-WATER; DYNAMIC MEMBRANE; LAYER; MBR; ULTRAFILTRATION; EXCITATION; DIVERSITY;
D O I：
10.1016/j.memsci.2016.02.058
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
Cake sludge attached on membrane surfaces was collected and characterized in a full scale membrane bioreactor (MBR) compared with bulk sludge. The morphological, chemical and microbial properties were examined through microscopic observations, particle size distribution (PSD) analysis, chemical analysis, Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM) and energy-diffusive X-ray (EDX) analysis, specific oxygen utilization rate (SOUR) measurements and Biolog assay. The results showed that fiber-like substances might have served as the skeleton of larger size aggregates in cake sludge. Moreover, much more polysaccharides and inorganic elements such as multivalent cations were accumulated in cake sludge than proteins and humics. Cake sludge showed lower microbial activity for aerobic degradation than bulk sludge, but higher metabolic activity for the degradation of refractory substances (aromatic proteins and humics) other than polysaccharides. Based on batch filtration experiments, it was found that cake sludge had much higher cake layer fouling potential but lower membrane pore blocking resistance, probably due to the heterogeneous structure of cake sludge resulting from accumulation and interaction of various inorganic and organic foulants. This investigation could assist in obtaining a better understanding of the fouling behavior and foulants accumulation properties of cake sludge in the full-scale MBRs. (C) 2016 Elsevier B.V. All rights reserved.
引用
收藏
页码：10 / 17
页数：8
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