Methane Gas Production from a Mixture of Cow Manure, Chicken Manure, Cabbage Waste, and Tofu Liquid Waste using the Anaerobic Digestion Method Fahmi Arifan (a*), Abdullah (b) Siswo Sumardiyono (b)
a) Department of Industrial Technology, Vocational School, Diponegoro University, Semarang, Indonesia
*fahmiarifan[at]live.undip.ac.id
b) Chemical Engineering, Diponegoro University
Abstract
Biomass is valuable alternative energy worldwide as a substitute for fossil fuels because it can be converted into various forms of usable energy such as heat, steam, electricity, biogas, and liquid transportation biofuels. Cabbage waste, tofu liquid waste, cow dung and chicken manure is dangerous for the surrounding environment, which produces CH4 gas and has a quite high BOD and COD values. This liquid waste has an amount of COD, suspended solids, and a high total solids content. One of the solutions to overcome this pollution is by processing the waste into biogas, especially methane gas. The material will be transform into methane gas by fermentation through anaerobic digestion method. Before transforming into biogas, initial characterization will be carried out in the form of total C content, total N, COD, and C/N ratio. Then from the results of the biogas produced, the maximum data obtained is in variable B4 ( 55% cow dung : 15% chicken manure: 15% cabbage waste : 15% liquid tofu waste) with a total amount of gas of 7140 ml. This shows that tofu liquid waste can increase the potential amount of biogas produced
