Production and Purification of Biogas Generated by Co-digestion of Cow Dung and Kitchen Waste

Abstract

This study was designed to produce biogas from co-digestion of cow dung and kitchen waste. 20 litres digester and gas collection systems were prepared from locally available materials. The feed materials were collected locally, pre-fermented, digested and analysed. Purification of the produced biogas was carried out by passing the gas through three chambers containing 40% KOH, CaO. activated charcoal and silica gel/activated charcoal respectively. The flame of the combusting purified biogas was observed to be more intense than that of the freshly produced impure biogas both in colour and height. The study confirmed that biogas can easily be generated and purified using locally and cheaply available raw materials.