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KMID : 1024519930020040311
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Journal of the Environmental Sciences
1993 Volume.2 No. 4 p.311 ~ p.316
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Methane Production by Anaerobic Digestion of Grain Dust in a Plug Flow Digester
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Yoon Tae-Kyung
Han Sung-Bum
Park Moon-Ki
Song Seung-Koo
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Abstract
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Methane production from grain dust was studied using a 3 L laboratory-scale anaerobic plug flow digester. The digester was operated at; temperature of 35, 45, and 55; hydraulic retention time(HRT) of 6 and 12 days; and influent concentration() of 7.8 and 9.0 % total solids(%TS). With ten different operation conditions, this study showed the significant effects of temperature, hydraulic retention time, and influent concentration on methane production. The highest methane-production rate achieved was 1.903 (L methane) /(L digester)(day) at 55, 6 days HRT, and of 7.8 %TS. A total of 3.767 L of biogas per day with a methane content of 50.57 % was obtained from this condition. The ultimate methane yield() was found to be a function of temperature and influent concentration, and was described as : = 0.02907T-0.1263-0.00297(T-10)(%TS), where TS is the total solids in the liquid effluent, and T is temperature(). Our results showed that thermophilic condition is better than mesophilic for grain dust stabilization in an anaerobic plug flow digester.
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KEYWORD
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anaerobic digestion, biogas, grain dust, methane, plug flow digester
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