Biogas production from restaurant waste with the addition of co-substrate variation of tofu liquid waste and cow dung

Restaurant waste is a potential biomass to be developed into a renewable energy, especially in biogas production. It is the main substrate for anaerobic process, as it contains many organic materials. Tofu liquid waste and cow dung have the potential to be used as an additional substrate in this process. This research aims to determine the effect of variations in the restaurant waste, tofu liquid, and cow dung composition towards the quality of methane gas in biogas production. It was conducted using a ۳۰ liters reactor with a working volume of ۲۲.۵ liters. The substrate variables included ۵۰%, ۹۳.۷۵%, and ۱۰۰% variations of restaurant waste, ۵۰% tofu liquid, and ۶.۲۵% cow dung. The results showed that the variations in the organic waste composition affected methane gas quality in biogas production. The reactor with ۱۰۰% restaurant waste substrate, obtained the highest yield in each parameter. The anaerobic treatment with ۱۰۰% restaurant waste substrate in reactor C yielded the highest values for each parameter. Additionally, the largest volume of biogas formed in this reactor was ۱۰۹ liters, with a methane gas concentration of ۵۱.۳۰۷ ppm which is followed by reactor B and then reactor A with biogas production of ۴۸ Liters and ۴۵ Liters. The ratio of methane and carbon dioxide levels in the biogas formed was ۶۰% and ۴۰%.

کلیدواژه ها:

anaerobic processes ، Biogas ، cow dung ، restaurant waste ، tofu liquid waste