Estimation of methane potential in household food waste in the Capital Regional District
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As a basis for discussing the feasibility of anaerobic digestion (AD) technology in the Capital Regional District (CRD), this research evaluated the annual methane potential in household food waste (HFW) in the CRD while taking into account biochemical methane potential (BMP) losses from food waste aerobic storage, scaling effect, and fugitive emissions at AD plants. For determining the BMP in HFW with local food waste properties, the BMP assay and the chemical property tests were conducted. The volatile solids of fresh, and stored, samples resulted 24.2 ± 0.3% and 25.07 ± 0.55% of their total mass, respectively. The annual methane potential of 777,175.98 m3 methane gas was estimated by referencing BMP of 300 mL CH4/g VS-1 because the tested BMP of fresh, and stored, samples, 53.56 ± 1.73 NmL CH4/g VS-1 and 40.44 ± 4.90 NmL CH4/g VS-1, were rejected for possible inhibition of methane formation in the present research.
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