Optimizing Biogas Production: Comparative Analysis Of Organic Substrates For Enhanced Gas Yield

Abstract

Study’s Novelty/Excerpt This study uniquely evaluates the biogas optimization potential of various locally sourced substrates, including cow dung, poultry dung, human, and pig manure, through a comparative analysis over a 15-day period using custom-made biodigesters. The research reveals that poultry dung yields the highest gas production, significantly outperforming other substrates with a gas production ratio of 0.20 on day 15, indicating its superior effectiveness. These findings contribute valuable insights into substrate efficiency for biogas production, suggesting poultry dung as a highly effective substrate and proposing co-digestion strategies to further enhance biogas yields. Full Abstract This research aimed to investigate the utilization of various locally sourced substrates in the biogas optimization process and compare the gas yield to determine the most efficient domestic substrate. The samples tested included cow dung, poultry dung, human, and pig manure. A comparative analysis of gas production over a 15-day period was carried out at 3-day intervals using four custom-made biodigesters with batch culture fermentation. The findings revealed that digester 4, utilizing poultry dung, exhibited the highest gas output. The gas production ratios for human, cow, pig, and poultry dung on day 15 were 0.10:0.11:0.12:0.20, equating to percentages of 18.86%, 20.78%, 22.64%, and 37.73% respectively. The notably higher percentage for poultry dung suggests its superior effectiveness as a substrate for biogas production. Alternatively, the co-digestion of cow and/or poultry dung could be considered as a strategy to enhance biogas production.