Design and fabrication of a domestic biogas unit for cooking applications

Abstract

This paper presents the design and fabrication of a domestic biogas unit by using daily organic waste for cooking. Basically, this unit consists a gas storage unit and a digester barrel. Initially, the organic wastes including kitchen wastes were deposited into the digester barrel which contains water with pH 6 once in every two days for two weeks. Then the mix started to produce biogas when the pH value reached around 6.8-7.5. After that food wastes were added slowly every day. When this step is continued further, the daily collection of biogases is 50 liters. As the digestate of this anaerobic digester is rich in nutrients this is also a good organic fertilizer for plants in the home garden. Also, this unit is designed and fabricated with easy maintenance and usage. Further, it is very much beneficial to dispose biodegradable kitchen wastes in an eco-friendly manner. In order to answer the energy demand in domestic level, it is highly essential to utilize the daily organic waste as a source of energy and produce methane as an alternative solution for cooking-energy requirement.