A METHOD AND INSTALLATION FOR ANAEROBIC FERMENTATION OF LIQUID MANURE

摘要

A method an installation for anaerobic fermentation of a liquid suspension of an organic substance and the production of methane gas therefrom, comprises a continuous circulation of supplied substance mixed with active sludge in a treatment chamber composed of two concentric vessels (16, 17). The inner vessel (16) is filled with contact elements and constitutes an upflow reactor with a bottom inlet for the mixture which flows over the open upper edge of this vessel (16) into the outer vessel (17) constituting a down-stream reactor. A pump (31) maintains the circulation of the mixture and a heat-exchanger (40) keeps the temperature at an appropriate level. The produced methane gas is discharged at the top (23) of the treatment chamber.