Proceedings of the
International Conference on Mechanical Engineering 2009
(ICME2009) 26- 28 December 2009, Dhaka, Bangladesh

ICME09-TH-19

GENERATION OF BIOGAS FROM ANEROBIC DIGESTION OF
VEGETABLE WASTE

M. Islam, B. Salam and A. Mohajan
Department of Mechanical Engineering
Chittagong University of Engineering and Technology, Chittagong, Bangladesh

ABSTRACT

Biogas, a renewable form of energy, could be a very well substitute of natural gas which is depleting very fast. A research work was conducted to investigate the production ability of biogas from vegetable waste. Five laboratory scale digesters were made to experiment the effect of co-digestion of vegetable waste and cow-dung in various proportions. The digesters were made of plastic container of four litre capacity each. Vegetable waste was used from 200 gm to 300 gm, and cow-dung was used from 0 gm to 300 gm to make vegetable waste to cow dung ratios from 1:0 to 1:1.5. From 2 to 3 mm sized vegetable waste was used in the experiment. The digester was feed on batch mode and operated at ambient temperature for about 15 days. In the slurry, total solid concentration was maintained 8% by mass for all of the observations. The maximum amount of biogas was yield 1200 ml/Kg of wastes at the vegetable waste and cow dung ratio 1:1.

Key words: Anaerobic Digestion, Biogas, Vegetable Waste, Cow Dung.

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