Bioenergy from Solid Waste

What is it about?

Biogas potential was explored for animal manure, wheat straw, food waste and rice straw. Batch experiments were performed at a laboratory scale using potential biomethane assays (BMP) for a period of 50 days. The biogas yield was observed higher when using rice straw (0.40 m3/kg VSadded) as a substrate, as compared to wheat straw (0.33 m3/kg VSadded) and animal manure (0.30 m3/kg VSadded) substrates. Around 10% of biogas was produced in the initial phase of 4 days for manure, wheat straw, and rice straw feedstocks. During the middle phase of 30 days for these feedstocks, 65 – 80% of biogas was produced. Less than 20% of biogas was produced during the final phase of last 16 days of the experiment. The biogas production from food waste was found lowest (0.02 m3/kg VSadded) among all substrates. Therefore, the anaerobic digestion (AD) of both food waste and animal manure is more suited in co-digestion fashion than mono-digestion.

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