Study on the Law of Co-digestion of Restaurant Food Waste and Household Kitchen Waste to Produce Biogas
The experiment designs 5 groups to explore the biogas production law and microbial community characteristics of anaerobic co-digestion systems under 5 different mixing ratios of restaurant food waste and household kitchen waste.Among them,the mixing ratios of restaurant food waste and household kitchen waste in experimental group 1,experimental group 2,experimental group 3,experimental group 4,and experimental group 5 are 10∶0,7∶3,5∶5,3∶7,and 0∶10,respectively.The results show that under different mixing ratios,the order of cumulative biogas production from high to low is experimental group 3＞experimental group 4＞experimental group 2＞experimental group 5＞experimental group 1,when the mixing ratio is 5∶5,the biogas production is the highest.Compared to the Cone model,the improved Gompertz model is more suitable for fitting the kinetics of co-digestion and biogas production of restaurant food waste and household kitchen waste.The synergistic effect of co-digestion of restaurant food waste and household kitchen waste mainly occurs in the first 10 d of anaerobic digestion,and the synergistic effect is strongest when the mixing ratio is 5∶5.Co-digestion of restaurant food waste and household kitchen waste can promote the improvement of Chemical Oxygen Demand(COD)removal rate,but has little effect on the degradation rate of carbohydrates and proteins.When the mixing ratio is 5∶5,the relative abundance of Syntrophomonas is higher,and the relative abundance of Methanococcus is the highest,indicating that the hydrolysis acid producing bacteria and methane producing bacteria are more balanced and more conducive to biogas production.
waste classificationrestaurant food wastehousehold kitchen wasteco-digestionlaw of biogas productionmicrobial community
万方数据
维普
