Abstract: In order to achieve the resources utilization of rice straw and cattle manure， the effect of 3 kinds of pretreatment agents （H2O2， H2SO4， NaOH）， different concentrations of pretreatment agents （2%， 4%， 6%） and the raw material ratios of cattle manure and rice straw （1∶1， 2∶1， 4∶1） on anaerobic fermentation of mixed cattle manure and rice straw were evaluated by batch tests. The results showed that H2O2 was the optimum pretreatment agent of rice straw， the optimum concentration was 2%， and the best raw material ratio of cattle manure and rice straw was 1∶1. The average production rate of biogas was 3980 mL·g-1. At the same time， the dynamics research found that the first order kinetic model and Modified Gompertz model system both could simulate the process of biogas production in the cattle manure and rice straw mixed fermentation system. The Modified Gompertz model system was more suitable for describing the anaerobic fermentation process of producing biogas.

Key words: cattle manure, rice straw, pretreatment, first order kinetic model, Modified Gompertz equation