Effect of enzyme secreting bacterial pretreatment on enhancement of aerobic digestion potential of waste activated sludge interceded through EDTA

被引：128

作者：

Kavitha, S. ^{[1
]}

Kumar, S. Adish ^{[1
]}

Yogalakshmi, K. N. ^{[2
]}

Kaliappan, S. ^{[3
]}

Banu, J. Rajesh ^{[1
]}

机构：

[1] Anna Univ, Reg Ctr, Dept Civil Engn, Tirunelveli 627007, India

[2] Cent Univ Punjab, Ctr Environm Sci & Technol, Bathinda, India

[3] Ponjesly Coll Engn, Dept Civil Engn, Nagercoil, India

来源：

BIORESOURCE TECHNOLOGY | 2013年 / 150卷

关键词：

Suspended solid reduction; Ethylene diamine tetra acetic acid; Response surface methodology; Bacterial pretreatment; Aerobic digestion; EXTRACELLULAR POLYMERIC SUBSTANCES; ANAEROBIC-DIGESTION; SEWAGE-SLUDGE; SOLUBILIZATION; HYDROLYSIS; EXTRACTION; EFFICIENCY; MECHANISM; EPS;

D O I：

10.1016/j.biortech.2013.10.021

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

In this study, the effect of Ethylene diamine tetra acetic acid (EDTA) on Extracellular polymeric substance (EPS) removal tailed with bacterial enzymatic pretreatment on aerobic digestion of activated sludge was studied. In order to enhance the accessibility of sludge to the enzyme secreting bacteria; the extracellular polymeric substances were removed using EDTA. EDTA efficiently removed the EPS with limited cell lysis and enhanced the sludge enzyme activity at its lower concentration of 0.2 g/g SS. The sludge was then subjected to bacterial pretreatment to enhance the aerobic digestion. In aerobic digestion the best results in terms of Suspended solids (SS) reduction (48.5%) and COD (Chemical oxygen demand) solubilization (47.3%) was obtained in experimental reactor than in control. These results imply that aerobic digestion can be enhanced efficiently through bacterial pretreatment of EPS removed sludge. (C) 2013 Elsevier Ltd. All rights reserved.

引用

页码：210 / 219

页数：10

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