Anaerobic digestion of ozonized biosolids

被引：285

作者：

Weemaes, M

Grootaerd, H

Simoens, F

Verstraete, W

机构：

[1] State Univ Ghent, Lab Microbial Ecol & Technol, B-9000 Ghent, Belgium

[2] Biotim NV, B-2610 Wilrijk, Belgium

来源：

WATER RESEARCH | 2000年 / 34卷 / 08期

关键词：

anaerobic sludge digestion; sludge hydrolysis; ozone;

D O I：

10.1016/S0043-1354(99)00373-5

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The effect of an oxidative pretreatment on the anaerobic digestion of sewage sludge was investigated. Sewage sludge from a domestic wastewater treatment plant was partially oxidized by ozone. The pretreatment could alter up to 67% of the organic matter: 29 +/- 3% was solubilized, 38 +/- 9% was removed. Anaerobic degradability tests indicated that the pretreatment step enhanced the subsequent anaerobic sludge digestion. The methane production was increased by a factor of 1.8 after an ozone treatment at a dose of 0.1 g O-3/g chemical oxygen demand (COD), while the methane production rate was 2.2 times higher compared to the untreated sludge. Higher ozone doses, although still positive, were found to have a less pronounced effect. Limited ozone treatment appears compatible with subsequent digestion of biosolids and economically feasible. (C) 2000 Elsevier Science Ltd. All rights reserved.

引用

页码：2330 / 2336

页数：7

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