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KMID : 0380020030180040318
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Korean Journal of Biotechnology and Bioengineering
2003 Volume.18 No. 4 p.318 ~ p.323
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Anaerobic Acid and Methane Fermentation using Paper Wastes
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Cho Geun-Hyung
Kim Jung-Kon
Kim Seong-Jun
Kim Si-Wook
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Abstract
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This study was carried out to investigate the possibility of reusing newspaper or paperbox waste by methane fermentation. When 15 g of newspaper and box wastes were digested separately for 24 days by batch fermentation, the amount of total organic acids produced were 2461 and 4978 mg/L, respectively. The tCOD removal rates were found to be 60.9 and 62.4%, respectively. In addition, the removal efficiencies of total solid were 34.8 and 33.4%, and those of volatile solid were 40.0 and 39.2%, respectively. During this period, the amounts of biogas produced were 6.95 and 6.43 L. In a semicontinuous reaction, tCOD removal efficiencies for newspaper and box wastes were 64.7 and 65.0%, respectively, after 14 days of digestion. After 25 days, which were needed to stabilize the methane fermentation, the amounts of biogas produced daily were 0.31 and 0.30 L/g.dry wt, respectively. Methane contents were 57.3 and 56.2%, respectively, and the pHs in the anaerobic acidogenic and methanogenic fermenters were 5.0 and 7.5, respectively.
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KEYWORD
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Acid fermentation, methane fermentation, organic acids
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