Anaerobic Digestion of Industrial Sludge to Produce Biogas

Proceedings of the
International Conference on Engineering Research, Innovation and Education 2013
ICERIE 2013, 11 ̶ 13 January, SUST, Sylhet, Bangladesh

Anaerobic Digestion of Industrial Sludge to Produce Biogas

Salma A. Iqbal1, Shahinur Rahaman, Mizanur Rahman, Abu Yousuf
Dept. of Chemical Engineering and Polymer Science
Shahjalal University of Science & Technology, Sylhet-3114

Keywords:
Anaerobic digestion,
Industrial sludge,
Biogas
Abstract: Anaerobic Digestion (AD) is a series of process in which microorganisms break down biodegradable material in the absence of oxygen, used for industrial or domestic purposes to manage waste and/or to release energy. It is a common scheme for industrial sludge treatment because of producing biogas the content of which includes methane (CH4)(55-65%),CO2(30-35%),small amounts of other O2, H2S etc. and is an environmentally friendly fuel. Large quantities of sludge are produced in industrial wastewater treatment. Industrial sludge has a high putrescibility and therefore has to be stabilized in order to enable an environmentally safe utilization or disposal. The anaerobic digestion is the standard technique to stabilize the industrial sludge. Digestion produces biogas and reduces the amount of organic matter. The amount of excess sludge production from wastewater treatment plants is continuously increasing. Therefore, minimization of excess industrial sludge is becoming more and more important. The objectives of the paper are the review of the anaerobic process, mass reduction, biogas production and improved dewatering properties of the treated sludge.

1. INTRODUCTION:

Biogas, as a renewable energy, can be produced from a variety of organic raw materials and utilized for various energy services, such as heat, combined heat and power or as a vehicle fuel. Biogas can be produced by anaerobic digestion or fermentation of biodegradable materials such as biomass, manure, sewage, industrial sludge,

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