The effect soluble microbial products (SMP) on the quality and fouling potential of MBR effluent

被引:24
|
作者
Juang, Lain-Chuen [1 ]
Tseng, Dyi-Hwa [2 ]
Chen, Yi-Min [2 ]
Semblante, Galilee Uy [3 ,4 ]
You, Sheng-Jie [3 ,4 ]
机构
[1] VaNung Univ, Dept Environm Engn, Chungli 320, Taiwan
[2] Natl Cent Univ, Grad Inst Environm Engn, Chungli 320, Taiwan
[3] Chung Yuan Christian Univ, Dept Bioenvironm Engn, Chungli 320, Taiwan
[4] Chung Yuan Christian Univ, R&D Ctr Membrane Technol, Chungli 320, Taiwan
关键词
Atomic force microscopy (AFM); Domestic wastewater; Excitation-emission matrix (EEM) fluorescence spectroscopy; Polytetrafluoroethylene (PTFE); Polyvinylidene fluoride (PVDF); EXTRACELLULAR POLYMERIC SUBSTANCES; MUNICIPAL WASTE-WATER; ORGANIC-MATTER NOM; MEMBRANE BIOREACTORS; RETENTION TIMES; ULTRAFILTRATION; PERFORMANCE; EXCITATION; FILTRATION; IMPACT;
D O I
10.1016/j.desal.2013.07.005
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
Soluble microbial products (SMP) that persist in the effluent of membrane bioreactors (MBRs) impact not only discharge quality, but also the performance of advanced filtration processes. This study investigated the effect of SMP on the characteristics and fouling potential of a laboratory-scale MBR effluent. First, the domestic waste-water influent, mixed liquor supernatant, and effluent were assessed. Variations in specific ultraviolet adsorption (SUVA) and molecular weight distribution (MWD) confirmed the degradation of pollutants, generation of SMP, and permeation of SMP through the membrane. The effluent contained more carbohydrates than proteins, but the two species combined had minority contribution to the total organic load. Instead, humic acids were the most abundant as confirmed by excitation-emission matrix (EEM) fluorescence spectroscopy analysis. Second, the MBR effluent was subjected to crossflow ultrafiltration (UF). The UF membrane quickly lost 60% of its initial flux, and dramatic transformations in surface morphology and roughness occurred. It also had poor SMP removal efficiency, as most of the carbohydrates and humic acids were not rejected. More proteins were identified on the fouled membrane surface, suggesting that they have a significant role in UF membrane fouling formation. (C) 2013 Elsevier B.V. All rights reserved.
引用
收藏
页码:96 / 102
页数:7
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