Study Of Anaerobic Co-digestion With Biomass And Refuse Leachate

In this thesis, studies sequencing batch and semi-continous anaerobic co-digestion with the biomass and refuse Leachate at the temperature of35℃unger different organic load.A batch anaerobic digestion with the refuse Leachate,The results show that the digestion process runs stable and the methane content stable at a high level. The highest methane concentration is up to79.8%,showing that the fresh refuse Leachate has a good biodegradability.A batch anaerobic co-digestion with biomass and refuse Leachate with the organic load of3gVS/L and30gVS/L.The results indicates that the digestion process with the organic load of30gVS/L is more stabilize than that of3gVS/L. The digestion system of both organic load can transit to methanogenic stage. The highest methane concentration of the biogas at the reaction end was77.14%and74.47%, showing that co-digestion with biomass and refuse Leachate is feasible,and the OLR has a great impact on the digestion stability.A semi-continous anaerobic co-digestion with biomass and refuse Leachatewith the organic load of0.5gVS/L-d and0.75gVS/L-d. The results indicates that both of the two OLR could not obtain a ideal digestion effect,with the performance of a low methane concentration and a high carbon dioxide content. The highest VFA concentration is up to9576mg/L under load of0.75gVS/L-d.Gompertz model was used to investigate the correlation of accumulative biogas yield and time on batch mesophilic anaerobic digestion with the organic load of30gVS/L.The results showed that accumulative biogas yield as a function of time had an strong excellent correlation with Gompertz model from which kinetic parameters of anaerobic digestion, such as the maximum accumulative biogas yield, the maximum biogas rate, lag-phase time.