温度与接种比对餐厨垃圾厌氧消化的影响研究OA

Anaerobic digestion is one of the effective approaches for resource utilization and harmless disposal of food waste,among which temperature and inoculum-to-substrate ratio(ISR)are key process parameters de-termining its treatment performance.Batch anaerobic digestion experiments of food waste were carried out un-der two temperature conditions(54 ℃ and 35 ℃)and two ISR levels(1.4 and 1.0).The results indicated that the optimal process condition was 54 ℃ with an ISR of 1.0,achieving a TS-based biogas yield of 292.15 mL/g and a volatile solids degradation rate of 68.13％,respectively.Volatile fatty acids(VFAs)in all experimental groups were dominated by acetic acid.Nevertheless,temperature and ISR exerted significant im-pacts on the total VFAs concentration.VFAs could be effectively degraded in the thermophilic groups,while the mesophilic group with low inoculum dosage presented a higher risk of acid accumulation.Under thermoph-ilic conditions,the concentration of coenzyme F420 increased significantly,and showed a synergistic effect with the lower inoculum dosage,which effectively enhanced the activity of methanogenic communities and acceler-ated VFAs conversion.