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Title:
AMMONIUM MAGNESIUM PHOSPHATE GENERATION SUPPRESSION SYSTEM AND METHANE FERMENTATION SYSTEM
Document Type and Number:
Japanese Patent JP2013215681
Kind Code:
A
Abstract:

To suppress generation of scale due to ammonium magnesium phosphate in a methane fermentation system or the like.

In a system of sending a raw material to a methane fermentation tank 7, taking out a part of the raw material sent to the methane fermentation tank to an ammonia removal device 102 outside the methane fermentation tank in parallel with a methane fermentation step, gasifying and removing ammonia included in the raw material to be a final target concentration while circulating it in the device in an anaerobic atmosphere, and returning it to the methane fermentation tank, a carbon dioxide gas dissolving device 200 and a cooling device 300 are provided, and carbon dioxide is dissolved in a methane fermentation digesting liquid. As the carbon dioxide, for instance, the carbon dioxide generated in the process of deammoniation of an ammonia stripping tower 10 is recycled.


Inventors:
NAKAGAWA TAKAHIDE
SASAKI KOICHI
SHIBUYA KOJI
SATO CHIHARU
HISADA MINORU
Application Number:
JP2012088983A
Publication Date:
October 24, 2013
Filing Date:
April 10, 2012
Export Citation:
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Assignee:
HITACHI POWER SOLUTIONS CO LTD
International Classes:
B09B3/00; B01F1/00; C02F3/34; C02F11/04
Domestic Patent References:
JP2008188498A2008-08-21
JP2012050917A2012-03-15
JP2006087986A2006-04-06
JP2006167522A2006-06-29
JP2009066558A2009-04-02
JP2006218429A2006-08-24
JP2009160567A2009-07-23
Foreign References:
WO2009041009A12009-04-02
WO2003097540A12003-11-27
WO2009099208A12009-08-13
Attorney, Agent or Firm:
Polaire Patent Business Corporation