乾式メタン発酵方法 - Kurita Water Industries Ltd.

Title:

乾式メタン発酵方法

Document Type and Number:

Japanese Patent JP4337307

Kind Code:

B2

Abstract:

To efficiently carry out dry type methane fermentation while properly keeping the NH4-N concentration and TS (total solid) concentration in a fermentation tank without requiring a hardly decomposable solid matter such as wood chips in the case of dry type methane fermentation of easily decomposable organic wastes at 60-100% organic matter decomposition ratio.

Organic wastes are loaded to a dry type methane fermentation tank 3 and subjected to dry type methane fermentation. The sludge obtained by the dry type methane fermentation is taken out and dehydrated by a dehydrator 4 and after the TS concentration is adjusted by adding water based on the necessity to the dehydrated sludge, the dehydrated sludge is turned back to the dry type methane fermentation tank 3. The effluent from the dehydration is discharge to outside of the system and subjected to nitrification and denitrification.

Inventors:

Haji Hideki
Mitsuaki Kuroshima
Yoshikazu Takeda
Shimizu Saiko

Application Number:

JP2002180256A

Publication Date:

September 30, 2009

Filing Date:

June 20, 2002

Export Citation:

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Assignee:

Kurita Water Industries Ltd.

International Classes:

B09B3/00; C02F11/04

Domestic Patent References:

JP11197697A
JP11309493A
JP2001070915A
JP2001347247A
JP2002052398A

Attorney, Agent or Firm:

Tsuyoshi Shigeno

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