J.of Soc of Agri Struc, Japan.
Vol.33,No.2 September 2002, 83-90
Original:
Language: Japanese

    In order to investigate the effect of the concentration of the trace metals on the kinetics of methane formation, the batch cultivation of met.hanogens for decomposition of acetate was carried out, in which the concentration of trace metals added to the culture medium was 0.5 - 300 times that of trace metals used in conventional method. As a result, appearance reaction rate constant increased with the concentration of trace metals added within 0.05 - 15mL^-1, and it reached maximum value of 0.586day^-1 at. 15mL^-1. On the other hand, the kinetics constant decreased with the increase of the trace metals added within 15 - 30mL^-1. Furthermore, appearance reaction rate constant became 8 times larger at the concentration of the trace metals added by 150 times the concentration used in conventional method. It is concluded that the concentration of the trace metals added to the culture medium affects significantly the rate of methane formation.

Keywords: methanogens, kinetics, trace metals, reaction rate constant

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