Characteristics and behaviors of soluble microbial products in sequencing batch membrane bioreactors at various sludge retention times

被引：48

作者：

Dong, Bin ^{[1
]}

Jiang, Shuangying ^{[1
]}

机构：

[1] Tongji Univ, Natl Engn Res Ctr Urban Pollut Control, Shanghai 200092, Peoples R China

来源：

DESALINATION | 2009年 / 243卷 / 1-3期

关键词：

Sequencing batch membrane bioreactor; Soluble microbial products; Sludge retention time; Accumulation; Molecular weight; Fouling potential; WASTE-WATER; REACTOR; SYSTEM; REUSE; SMP;

D O I：

10.1016/j.desal.2008.04.026

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The characteristics and behaviors of soluble microbial products (SMP) in sequencing batch membrane bioreactors (SBMBRs) were investigated at various sludge retention times (SRTs). SMP concentrations in SBMBRs reached a minimum at SRT of 40 days and were consistently higher than those in effluents. The extent of SMP accumulation was found to sigificantly increase with decreasing SRT. Similar molecular weight distributions of SMP in SBMBRs and in effluents were observed suggesting that SMP accumulation is not mainly because of size exclusion. Biomass associated products having a higher proportion of larger and more aromatic components appeared less prone to accumulate in SBMBRs than utilization associated products. Protein constituted a larger fraction of SMP than carbohydrate, especially at long SRTs and in effluents. The fouling potential of SMP was observed to be higher at shorter SRTs. Carbohydrate was speculated to be the major fraction of SMP possessing the highest potential to foul mernbranes and accumulate in SBMBRs.

引用

页码：240 / 250

页数：11

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