Design and construction of food waste-Biogas system for small scale application

Sivagiganesan, Dhayalan (2019) Design and construction of food waste-Biogas system for small scale application. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

Biogas is a type of biofuel that is produced naturally from decomposition of biodegradable waste through anaerobic digestion. Waste food that is not managed well causes greenhouse effect, and environmental issues. Current biogas technologies is not suitable for residential houses. The aim of this project is to do a survey, then design and construct a small scale biogas digester. Initially, a thorough study has been made through journals in order to find the best possible outcome in this project. The project was started by doing a survey in Melaka and Selangor areas followed by creating house of quality, morphological chart and Pugh method. With the weighted data, a design which includes the material selection has been made using SolidWorks. Using the design as the base, a prototype of small scale biogas digester was fabricated. 4kg of meat was used as the feedstock to generate biogas. After two weeks, the volume of gas measured every day for ten days. The rate of biogas production and the factors affecting the rate of biogas production was analysed. The findings show that, the surrounding temperature, size of the digester and the type of feedstock are the primary factors that affect the rate of biogas production. For this prototype testing, it was able to produce an average of 1 litre of biogas per day. The biogas produced was tested for the ability to create flame which resulted positively. All the objectives of the project were achieved. Conclusion and recommendation has been made to finalize the project.

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