花生饼粕协同餐厨垃圾厌氧消化研究OA

Conventional treatment methods for food waste are often resource-intensive and inefficient.For this problem,we explore the feasibility and synergistic mechanisms of co-anaerobic digestion of food waste and peanut meal.Therefor,batch digestion experiments were conducted for 30 days at 35℃with food waste and peanut meal mixed at ratios of 8∶2,7∶3,1∶1,3∶7,and 2∶8(based on volatile sus-pended solid),and mono-digestion of each substrate is served as control.The results showed that the addition of peanut meal effectively adjusted the carbon to nitrogen ratio of system.At a mixing ratio of 7∶3,the methane production was increased by up to 22.43%,reaching 193.96 mL/g.Moreover,co-digestion increased the concentration of short-chain fatty acids(SCFAs).The concentration of SCFAs was 4 148.31 mg/L,representing an increase of 57.11%comparing to that of the mono-digestion.Co-digestion enhanced both the total output and the composition profile of SCFAs.This process also avoi-ded system instability caused by excessive acidification,thereby providing a more continuous and stable substrate supply for the methanogenic phase.The relative abundance of the methanogenic archae of Candidatus Methanofastidiosum in the co-digestion system increased by 4.86%,facilitating the optimi-zation of hydrogen metabolism process.This study demonstrates that co-digestion of food waste and peanut meal enhances anaerobic digestion performance,offering a viable pathway for the synergistic and efficient resource recovery of both substrates.