Treating process of garbage contained wastes
AssigneeAgency of Industrial Science and Technology
InventorsMasahiko Ishida, Ryoichi Haga, Yoji Odawara
Life of this patent
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Abstract
The present invention relates to a process for digesting garbage or garbage contained wastes, particularly to a microbiological treatment which facilitates the treatment with high efficiency and economics, for the recovery of methane gas, first, by effecting an alcohol fermentation treatment by alcohol fermentative yeasts which can directly convert starch into ethanol without a starch hydrolysis pretreatment in the slurry state, followed by a direct methanization by methane bacteria of the fermented product containing ethanol, without effecting sterilization treatment of garbage or garbage contained wastes.
Claims9
A digestion process for treating starch containing garbage consisting essentially of the steps of:
- (a) subjecting said starch containing garbage to an alcohol producing anaerobic fermentation in the slurry state without sterilizing said starch containing garbage in the presence of at least one ethanol producing yeast which directly converts starch into ethanol without a hydrolysis pretreatment step,
- (b) subjecting the resultant alcohol fermented product containing ethanol directly to methane producing anaerobic fermentation in the presence of methane producing bacteria which directly converts ethanol into methane, and
- (c) recovering the methane generated by said methane producing anaerobic fermentation.
Dependencies are inferred from the claim text.