초록
This study investigated the feasibility of anaerobic digestion (AD) of potato peel waste (PPW) and its lactic acid fermentation residue (PPW-FR) for methane (CH<SUB>4</SUB>) production. The experimental results showed that about 60-70% CH<SUB>4</SUB> content was obtained. The digester using PPW-FR as feedstock exhibited better performance and produced a highest cumulative CH<SUB>4</SUB> production of 273L/kg VS<SUB>fed</SUB>, followed by 239L/kg VS<SUB>fed</SUB> using PPW under the same conditions. However, with increasing solid loadings of PPW-FR feedstock from 6.4% to 9.1%, the CH<SUB>4</SUB> production was inhibited. The generation, accumulation, and degradation of volatile fatty acids (VFAs) in digesters were also investigated in this research.