Optimizing the ratio of raw materials and pH on biogas production from cow manure with banana peel waste in batch system reactors

Abstract

Politeknik Negeri Jember has dairy cows TEFA which produce relatively large amounts of cow dung waste, namely 280 kg per day. The fecal waste is directly thrown into waterways, causing air pollution, namely causing an unpleasant odor. It would be interesting to conduct research on cow dung waste in TEFA of dairy cows. This research was carried out with the aim of utilizing cow manure which is waste in TEFA dairy cattle as raw material for biogas with a mixture of banana peel waste as a substrate. In this research, a batch system reactor with an anaerobic fermentation method was used. The variables used were the ratio of cow manure to banana peel waste with variations of 1:1, 1:2, 1:3, and the pH variable variations of 6, 7, and 8. The test parameter observed in the research was the volume of biogas. The experimental design used to determine optimum conditions is the Response Surface Method (RSM). The experimental design was carried out on 2 variables with 3 variations so that 9 data points were obtained. Based on the test results, it is known that the optimum conditions for the variable ratio of cow dung to banana peel waste and pH are 1:3 and the pH variation is 6, where the volume of gas produced is 177.8 ml.