Two-phase type methane fermentation reactor
AssigneeBioelex Corporation
InventorTakaaki Maekawa
Life of this patent
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Abstract
Provided by the invention is a reactor for two-phase methane fermentation of organic waste materials such as livestock excrements which can be operated for a long period with stability. The apparatus comprises an acid fermentation tank (1) connected to a feed tank, a methane fermentation tank (2) partitioned from the acid fermentation tank (1) with a partition wall (4) having a gate valve (4A) and a settling tank (3) partitioned from the methane fermentation tank (2) by a second partition wall (5) having a gate valve (5A) and the space in the upper part of the methane fermentation tank (2) serves as a gas holder (6). The methane gas generated in the methane fermentation tank (2) and collected in the gas holder (6) is taken out from a methane outlet pipeline (10) opening in the canopy of the gas holder (6).
Claims5
A reactor for two-phase methane fermentation of an organic waste material which comprises:
- (a) an acid fermentation tank which receives a feed liquid for fermentation treatment;
- (b) a methane fermentation tank of a gas holder type positioned side-by-side to the acid fermentation tank, of which the upper space serves as the methane gas holder;
- (c) a first vertical partition wall which partitions the acid fermentation tank and the methane fermentation tank;
- (d) a settling tank positioned side-by-side to the methane fermentation tank, out of which a digestion liquid is discharged;
- (e) a second vertical partition wall which partitions the methane fermentation tank and the settling tank;
- (f) a first gate valve provided on the first partition wall for controlling the liquid flow between the acid fermentation tank and the methane fermentation tank;
- (g) a second gate valve provided on the second partition wall for controlling the liquid flow between the methane fermentation tank and the settling tank;
- and
- (h) a methane gas outlet pipeline having a stopcock valve connected to the methane gas holder.
Dependencies are inferred from the claim text.