Enhanced methane production with co-feeding spent coffee grounds using spare capacity of existing anaerobic food waste digesters.

ABSTRACT: With increasing coffee consumption worldwide, the efficient and sustainable management of spent coffee grounds (SCG) has become increasingly challenging. This study investigated the anaerobic co-digestion of small amounts of SCG with food waste (FW) at increasing co-feeding ratios of 1:100-1:10 (volatile solids basis) to assess the possibility of SCG treatment using the spare capacity of existing anaerobic digesters. Co-feeding SCG increased methane production compared to FW mono-digestion in the tested range of co-feeding ratios without compromising process stability. Methane yield did not further increase when the SCG/FW ratio increased above 4%, and process failure occurred at a 1:10 co-feeding ratio without trace element supplementation. The enhanced methanogenic performance was attrib

SUBMITTER: Kim D 

PROVIDER: S-EPMC10891051 | biostudies-literature | 2024 Feb

REPOSITORIES: biostudies-literature