| With the development of social economy and acceleration of urbanization, the municipal solid waste (MSW) is rapidly increasing in China. Disposal of MSW had become a crucial problem which affected the environment and hindered development of society. MSW is characterized by a high content of organic compounds and anaerobic digestion has become one of the accepted and proven technologies for the treatment of municipal solid waste. Contract of other traditional disposal technologies, anaerobic digestion generate biogas which may be used as a source of energy.Batch co-digestion of municipal solid waste and night soil was carried out for 100 days at room temperature(30±4℃).The ultimate biochemical methane potential of substrates was found to be 0.099m3/kg volatile solids. The experimental and ultimate gas yield obtained from substrates compared well with the yields obtained from first order kinetic model.Then a mathematical model for anaerobic digestion of municipal garbage and night soil was developed to describe the dynamic behavior of batch digestion. The microbial kinetic model includes an enzymatic hydrolysis step and four microbial growth steps, together with the effects of substrates inhibition and pH consideration. The effects of the hydraulic retention time, the composition of feed, the initial conditions of the reactors and the process performance can be evaluated by the dynamic model. The mathematical model can help to design anaerobic digester and provide theory direction for engineering practice. In addition, human-machine interface is founded with Visual Basic program which can simplify calculation process.At last, correlation coefficient and MAPE of the date derived of mathematical model and experiment were calculated. The calculation result is feasible in permitted range of error. And the reason of error is analyzed.
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