Title:
TWO-PHASE TYPE METHANE FERMENTATION REACTOR
Document Type and Number:
WIPO Patent Application WO/2001/009280
Kind Code:
A2
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).
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Inventors:
MAEKAWA TAKAAKI (JP)
Application Number:
PCT/JP2000/004989
Publication Date:
February 08, 2001
Filing Date:
July 26, 2000
Export Citation:
Assignee:
TSUKUBA BIOSYSTEM LTD (JP)
MAEKAWA TAKAAKI (JP)
MAEKAWA TAKAAKI (JP)
International Classes:
B09B3/00; C02F11/04; C05F3/06; C05F17/02; C05G5/00; C10L3/06; C12M1/107; (IPC1-7): C12M/
Foreign References:
| DE19715646A1 | 1998-10-22 | |||
| EP0335825A1 | 1989-10-04 | |||
| FR2510605A1 | 1983-02-04 | |||
| FR2305113A1 | 1976-10-22 |
Attorney, Agent or Firm:
Agata, Akira (3rd Floor 12-5 Shimbashi 2-chome Minato-ku, Tokyo, JP)
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Claims:
CLAIMS
| 1. | A reactor for twophase 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 posi tioned sidebyside 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 sidebyside 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 fermenta tion 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. |
| 2. | The reactor for twophase methane fermentation of an organic waste material as claimed in claim 1 in which the gate valve in the first partition wall partitioning the acid fermentation tank and the methane fermentation tank is linked with a float floating on the liquid in the methane fermentation tank in such a manner that the gate valve is operated by the movement of the float. |
| 3. | The reactor for twophase methane fermentation of an organic waste material as claimed in claim 1 in which the gate valve in the second partition wall partitioning the methane fermentation tank and the settling tank is linked with a float floating on the liquid in the settling tank in such a manner that the gate valve is operated by the movement of the float. |
| 4. | The reactor for twophase methane fermentation of an organic waste material as claimed in claim 1 in which at least one of the acid fermentation tank, methane fermen tation tank and settling tank is provided with a means for controlling the temperature of the liquid therein. |
| 5. | The reactor for twophase methane fermentation of an organic waste material as claimed in claim 1 in which the ratio of the volume capacities of the acid fermentation tank and the methane fermentation tank is in the range from 1: 5 to 1: 10. |
Description:
INTERNATIONAL SEARCH REPORT tntt iona) Apptication No Information on patent tamily members PCT/JP 00/04989 Patent document Publication Patent family Publication cited in search report date member (s) date DE 19715646 A 22-10-1998 NONE EP 0335825 A 04-10-1989 DE 3810250 A 05-10-1989 AT 80134 T 15-09-1992 DE 58902173 D 08-10-1992 ES 2034743 T 01-04-1993 FR 2510605 A 04-02-1983 BR 8204415 A 19-07-1983 DE 3272138 D 28-08-1986 EP 0074290 A 16-03-1983 ES 514531 D 01-05-1983 ES 8306178 A 01-08-1983 JP 1752758 C 08-04-1993 JP 4038476 B 24-06-1992 JP 58070888 A 27-04-1983 MX 158025 A 29-12-1988 OA 7167 A 31-03-1984 US 4780415 A 25-10-1988 FR 2305113 A 22-10-1976 NONE
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