期刊
ENERGIES
卷 5, 期 11, 页码 4746-4757出版社
MDPI AG
DOI: 10.3390/en5114746
关键词
effluent; methane; response surface methodology
资金
- Fermentation Research Center for Value-Added Agricultural Products, Khon Kaen University
- National Research University Project through the Biofuels Research Cluster-Khon Kaen University, Office of the Higher Education Commission
Response surface methodology with a central composite design was applied to optimize the key factors affecting methane production from the acidic effluent coming from the sugarcane juice hydrogen fermentation process. The parameters studied were substrate concentration, ratio of NaHCO3 to substrate concentration and initial pH. The experimental results showed that substrate concentration and initial pH had significant individual (p < 0.05) effect on methane yield (MY). However, there was no interactive effect between these variables (p > 0.05). The maximum MY of 367 mL CH4/g-volatile solid (VS)(added) was obtained at the optimum conditions of 13,823 mg-COD/L, an NaHCO3 to substrate concentration ratio of 3.09 and an initial pH of 7.07. Under the optimum conditions, MY was enhanced 4.4-fold in comparison to raw effluent.
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