Abstract：
:A concept of methane yield at optimum pH was advanced and subsequently a mathematical model that simulates the optimal pH of a batch process for anaerobic digestion of organic fraction of municipal solid waste (MSW) was developed and validated. The model was developed on the basis of the microbial growth kinetics and was divided into three processes: hydrolysis of substrates by hydrolytic bacteria, consumption of soluble substrate by acidogenic bacteria, and finally consumption of acetate and methane generated by methanogenic bacteria. Material balance and liquid phase equilibrium chemistry were used in this study. A series of experiments were conducted to validate the model. The model simulation results agreed reasonably with experimental data in different temperatures and total solid (TS) concentrations under uncontrolled pH. A computer circulation program was used to predict the optimal pH in different conditions. Experiments in different temperatures and TS were run under optimal pH which predicted by the model. The model was succeeded in increasing the methane production and the cumulative methane production had an average increment about 35% in optimal pH of different temperatures and TS.
journal_name
Bioresour Technoljournal_title
Bioresource technologyauthors
Liu CF,Yuan XZ,Zeng GM,Li WW,Li Jdoi
10.1016/j.biortech.2007.01.013subject
Has Abstractpub_date
2008-03-01 00:00:00pages
882-8issue
4eissn
0960-8524issn
1873-2976pii
S0960-8524(07)00091-0journal_volume
99pub_type
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