Comparative analysis of biogas production from food waste and cow dung
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Date
2025-09-16
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UMT Lahore
Abstract
This work investigates the relative effectiveness of vegetable waste and cow dung as mono-digestion substrates for the production of biogas. Over the course of 21 days, two comparable batch-type digesters were operated using 4 L slurries that had been made separately from vegetable and cow manure. The manufacturing of gas Daily monitoring was conducted using the water displacement method, and biochemical tests were used to characterize the microbial communities. According to the results, a total of 6599 ml was produced by cow dung, while 5199 ml was produced by vegetable waste. Vegetable waste digestion peaked at 491 ml/day on day 12 and then quickly fell, suggesting less stability, while cow dung digestion maintained steady production, peaking at 520.6 ml/day on day 13. According to these findings, vegetable waste produces gas more quickly but is less sustainable than cow dung, which is a superior long-term substrate. Vegetable waste decomposed swiftly but fell quickly, while cow dung produced steady, consistent supplies. According to biochemical studies, Pseudomonas, Klebsiella, E. coli, and Enterobacter sp. predominated in vegetable waste, whereas Bacillus, Clostridium, Proteus, and Enterobacter spp. predominated in cow dung. The greater methane quality of cow manure biogas was validated by flame tests. All things considered, anaerobic digestion of organic wastes is a sustainable approach to waste management, renewable energy, and environmental preservation that directly supports several Sustainable Development Goals (SDGs) of the UN.