METHOD AND DEVICE FOR GAS METHANATION USING SPRINKLE BIOREACTORS

摘要

The invention relates to a method for gas methanation using sprinkle bioreactors, as well as to a device for carrying out said method. The invention describes a method for methanating gaseous substrates in which the following steps are carried out: a) providing a reactor, filled with culture beds, with methane-forming micro-organisms that are immobilised on the surface of said culture beds; b) sprinkling the culture beds that have the methane-forming micro-organisms immobilised thereupon, with a process liquid, c) supplying a mixture of gaseous substrates to the reactor, the mix ratio of the substrates in the gas phase being selected such that dissolving said gaseous substrates in the process liquid results in a stoichiometric ratio of the gaseous substrates dissolved in said process liquid, and d) conducting the obtained gas mixture out of the reactor. The invention also describes suitable devices for carrying out the method and suggests culture beds which are designed as rotatable discs and arranged in the longitudinal axial direction of the cylindrical region of the reactor. The described method and device make the use of gas methanation more economical, particularly in the biochemical production of methane from carbon dioxide and hydrogen.