| 摘要 |
The present invention relates to a method wherein solid organic waste originating from plants or animals or both, is digested by an anaerobic fermentation, that is less labor, time and space consuming than the conventional aerobic fermentation method, and may be performed with waste that has not to be subjected to a pre-treatment wherein a slurry having a rather low solids content is prepared. According to the present method solid organic waste originating from plants or animals or both is decomposed under anaerobic conditions in at least one primary reactor, whereupon the water soluble fatty acids formed by said decomposition together with other soluble organic and inorganic substances are removed to a substantial extent by rinsing with an aqueous liquid in order to avoid that in the reactor the concentration of fermentation inhibiting substances becomes too high and/or the pH of the contents of the reactor becomes too low, and the solution thus formed is fed to at least one auxiliary reactor wherein the organic material is converted into a mixture of carbon dioxide and methane under anaerobic conditions in a way known per se and the sludge formed in the primary reactor is removed therefrom.
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