J.of Soc of Agri Struc, Japan.
Vol.23,No.3 March 1993,111-116
Original:
Language: English

    The dependence of CH₄ gas production on digester temperatures and volatile solid(VS) loading rates was investigated. Erlenmeyer flasks with a 1 x 10^-3 m³ capacity were used as digesters. Liquid fraction, after the solid-liquid separation of dairy cattle manure, were digested by semi continuous operation under the conditions of the temperatures of 20, 30, 35, 40 and 48 centigrade, VS loading rates of 3.0, 6.6, 10.2,14.8 and 21.9 kg-VS.m^-3.day^-1, and manual shaking of flasks twice a day. CH₄ gas production rates were measured by using floating cap type gas holders. The results were as follows ;
(a) The dairy cattle manure should be digested at a digester temperature of approximately 40 centigrade.
(b) The liquid fraction was digested better with a higher VS loading rate contrary to conventional values.

Keywords: Anaerobic Digestion, Digester Temperature, Dairy Cattle Manure, Liquid Fraction

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