This paper represents a process optimization model of
pH–methane yield of an ABR system for digestion of organic fraction of MSW. Through this model, the optimal
pH at different temperatures and initial TS concentrations
can be obtained by using a computer circulation program.
Furthermore, the maximal methane production can be predicted
in the optimal pH. Therefore a maximal generation
rate of methane can be obtained and a great efficiency of
anaerobic digestion can be achieved in the operation of
anaerobic digestion of MSW. However, this paper only
researched on the relation between the pH and cumulative
methane production. The factors on the value of pH such
as the concentration of VFA, HCO
3, NHþ
4 and furthermore
the controlling of the additional quantity of NaHCO3
would be studied in future.