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- Title
Influence of Storage Time of Food Waste on the Substrate Characteristics and Energetic Potential Through Anaerobic Digestion.
- Authors
Parra-Orobio, Brayan Alexis; Correa-Betancourt, María Alejandra; Lozano-Messa, María Tatiana; Foronda-Zapata, Kevin Yeneifer; Marmolejo-Rebellón, Luis Fernando; Torres-Lozada, Patricia
- Abstract
The storage time (ST) of food waste (FW) influences the anaerobic digestion (AD) process. This study evaluated the effect of the ST (A1:0 — fresh FW; A2:2, A3:3 and A4:4 days) on the substrate characteristics, the biochemical methane potential (BMP), the substrate hydrolysis (kh) and the FW energy potential, considering two energy potential scenarios (A: energy use for electricity production and B: use of methane as biofuel) against C: final disposal in landfills, in terms of greenhouse gas (GHG) emissions and transportation costs. Although ST reduced the lignin content of the substrate (by 20%) for A4, this favoured the subsequent formation of humic substances (HS) and increased acidogenic activity, inhibiting the methanogenesis, being the BMPs for A1 and A2 (103.3 and 110.40 NmLCH4 gVS−1) higher than for A3 and A4 (14 and 34% respectively, p < 0.05,); additionally, the kh values for A3 and A4 were 39 and 73% lower than A2, with the highest kh (0.101 day−1). The scenarios A and B would avoid FW transport to the landfill and reduce annual diesel consumption costs by 639 and 1005%, respectively, while C would increase GHG emissions by 258 and 812% over scenarios A and B, respectively, being the least desirable option.
- Subjects
ANAEROBIC digestion; FOOD waste; FOOD storage; LANDFILL gases; HUMUS; FOOD industrial waste; EMISSIONS (Air pollution)
- Publication
Water, Air & Soil Pollution, 2022, Vol 233, Issue 6, p1
- ISSN
0049-6979
- Publication type
Article
- DOI
10.1007/s11270-022-05657-y