Oxidation reduction potential as a parameter to regulate micro-oxygen injection into anaerobic digester for reducing hydrogen sulphide concentration in biogas

被引：91

作者：

Nghiem, Long D. ^{[1
]}

Manassa, Patrick ^{[1
]}

Dawson, Marcia ^{[2
]}

Fitzgerald, Shona K. ^{[2
]}

机构：

[1] Univ Wollongong, Sch Civil Min & Environm Engn, Strateg Water Infrastruct Lab, Wollongong, NSW 2522, Australia

[2] Sydney Water Corp, Parramatta, NSW 2124, Australia

来源：

BIORESOURCE TECHNOLOGY | 2014年 / 173卷

关键词：

Anaerobic digestion; Micro-aeration; Hydrogen sulphide; Biogas; Oxidation reduction potential (ORP); MICROAEROBIC CONDITIONS; WASTE-WATER; CO-DIGESTION; SLUDGE; REMOVAL; PLANT;

D O I：

10.1016/j.biortech.2014.09.052

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

This study aims to evaluate the use of oxidation reduction potential (ORP) to regulate the injection of a small amount of oxygen into an anaerobic digester for reducing H2S concentration in biogas. The results confirm that micro-oxygen injection can be effective for controlling H2S formation during anaerobic digestion without disturbing the performance of the digester. Biogas production, composition, and the removal of volatile solids (VS) and chemical oxygen demand (COD) were monitored to assessment the digester's performance. Six days after the start of the micro-oxygen injection, the ORP values increased to between -320 and -270 mV, from the natural baseline value of -485 mV. Over the same period the H2S concentration in the biogas decreased from over 6000 ppm to just 30 ppm. No discernible changes in the VS and COD removal rates, pH and alkalinity of the digestate or in the biogas production or composition were observed. Crown Copyright (c) 2014 Published by Elsevier Ltd. All rights reserved.

引用

页码：443 / 447

页数：5

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