Biogas from Wastewater Treatment of Rajabhat Mahasarakham University Water Supply System, Maha Sarakham Province

Abstract

The objectives of the research were to produce biogas from wastewater treatment of the water supply system in RMU, Maha Sarakham Province. Fresh cow manure, which is the manure of beef cows, is part of the biogas production process. To assess biogas production and demonstrate renewable energy applications, the biogas system was constructed. The research focused on the fermentation four times, collecting data one time a day continuously, and designing an experiment for six months. The research results showed that the best ratio to produced biogas was waste water: cow leathate was polluted water 200: cow manure 200, with a yield of biogas of 3,429 litter, a fermentation time of 58 days, and the flammability of biogas of 171.39 minutes. The second ratio to produced biogas was wastewater: cow leathate was polluted water 200: cow manure 150, with a yield of biogas of 1,656 litter, a fermentation time of 46 days, and the flammability of biogas of 83.07 minutes. The third ratio to produced biogas was waste water: cow leathate was polluted water 200: cow manure 100, with a yield of biogas of 898.200 litter, a fermentation time of 29 days, and a flammability of biogas of 45.54 minutes. The minimum ratio to produced biogas was waste water: cow leathate was polluted water 200; cow manure was 5 with a yield of biogas of 522 litter; fermentation time was 17 days; and the flammability of biogas was 26.55 minutes. The research indicates that components of biogas with methane gas (CH₄) had a maximum average of 56.96% (vol/vol), followed by carbon dioxide (CO₂) at 25.44% (vol/vol), other gases at 15.28% (vol/vol), oxygen gas (O₂) at 2.42% (vol/vol), and hydrogen sulfide gas (H₂S) at 232.20 ppm.