Low temperature thermo-chemical pretreatment of dairy waste activated sludge for anaerobic digestion process

被引：166

作者：

Rani, R. Uma ^{[1
]}

Kumar, S. Adish ^{[1
]}

Kaliappan, S. ^{[2
]}

Yeom, Ick-Tae ^{[3
]}

Banu, J. Rajesh ^{[1
]}

机构：

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

[2] Anna Univ, Dept Civil Engn, Madras 600025, Tamil Nadu, India

[3] Sungkyunkwan Univ, Dept Civil & Environm Engn, Seoul, South Korea

来源：

BIORESOURCE TECHNOLOGY | 2012年 / 103卷 / 01期

关键词：

Waste activated sludge; Thermo-chemical pretreatment; Biogas; Biodegradability; Anaerobic digestion; EXTRACELLULAR POLYMERIC SUBSTANCES; FLOC DISINTEGRATION; BIOLOGICAL SLUDGE; WATER SLUDGE; EXTRACTION; KINETICS; REACTOR; EPS;

D O I：

10.1016/j.biortech.2011.09.124

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

An investigation into the influence of low temperature thermo-chemical pretreatment on sludge reduction in a semi-continuous anaerobic reactor was performed. Firstly, effect of sludge pretreatment was evaluated by COD solubilization, suspended solids reduction and biogas production. At optimized condition (60 degrees C with pH 12), COD solubilization, suspended solids, reduction and biogas production was 23%, 22% and 51% higher than the control, respectively. Secondly, semi-continuous process performance was studied in a lab-scale semi-continuous anaerobic reactor (5 L), with 4 L working volume. With three operated SRTs, the SRT of 15 days was found to be most appropriate for economic operation of the reactor. Combining pretreatment with anaerobic digestion led to 80.5%, 117% and 90.4% of TS, SS and VS reduction respectively, with an improvement of 103% in biogas production. Thus, low temperature thermo-chemical can play an important role in reducing sludge production. (C) 2011 Elsevier Ltd. All rights reserved.

引用

页码：415 / 424

页数：10

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