Comparison of ultrafiltration characteristics between activated sludge and BAC sludge

被引：119

作者：

Kim, JS

Lee, CH

Chun, HD

机构：

[1] Seoul Natl Univ, Coll Engn, Dept Chem Technol, Seoul 151742, South Korea

[2] Res Inst Ind Sci & Technol, Pohang 790330, South Korea

来源：

WATER RESEARCH | 1998年 / 32卷 / 11期

关键词：

activated sludge; biological activated carbon; ultrafiltration; fouling; extracellular polymeric substance; powdered activated carbon;

D O I：

10.1016/S0043-1354(98)00104-3

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The effects of powdered activated carbon (PAC) addition on the ultrafiltration characteristics of activated sludge were investigated. Particle size distribution of biological activated carbon (BAC) sludge shifted to the lower region compared with that of nonnal activated sludge due to the relatively smaller size of the added PAC. Although the total suspended solid (SS) of BAC sludge was higher than that of normal activated sludge and the floc size was reduced, the membrane permeability of BAC sludge was greatly enhanced compared with that of normal activated sludge. It is because the addition of PAC led to the decrease of not only the compressibility of sludge flee but the content of extracellular polymeric substances (EPSs) inside the microbial floc, which increased porosity of cake layer and thus enhanced the membrane flux. The flux increase in BAC sludge was more pronounced a with the increase in the nitrification extent. (C) 1998 Elsevier Science Ltd. All rights reserved.

引用

页码：3443 / 3451

页数：9

共 27 条

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