AI Article Synopsis
- The study examined the effects of co-digestion (mixing multiple biomass types) versus mono-digestion (using individual biomass types) on biogas and methane (CH4) yields using five types of biomass, including vegetable waste and animal manures, over 65 days under high temperatures.
- Results showed that co-digestion significantly enhanced both biogas and CH4 yields, especially when three different biomass types were combined, regardless of the specific materials used.
- Early in the digestion process, co-digestion led to a greater increase in CH4 production compared to mono-digestion, and while it slightly improved the ratio of CH4 to CO2 in the gas produced, this change was not statistically significant.
Article Abstract
Impact of co-digestion versus mono-digestion on biogas and CH4 yield for a set of five biomass materials (vegetable food waste, cow dung, pig manure, grass clippings, and chicken manure) was investigated considering 95 different biomass mixes of the five materials under thermophilic conditions in bench-scale batch experiments over a period of 65days. Average biogas and CH4 yields were significantly higher during co-digestion than during mono-digestion of the same materials. This improvement was most significant for co-digestion experiments involving three biomass types, although it was independent of the specific biomasses being co-digested. Improvement in CH4 production was further more prominent early in the digestion process during co-digestion compared to mono-digestion. Co-digestion also appeared to increase the ultimate CH4/CO2 ratio of the gas produced compared to mono-digestion although this tendency was relatively weak and not statistically significant.
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| http://dx.doi.org/10.1016/j.wasman.2016.05.020 | DOI Listing |
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