Title:
METHANE FERMENTATION METHOD, METHANE FERMENTATION SYSTEM, WASTE MATERIAL RECYCLING METHOD, AND WASTE MATERIAL RECYCLING SYSTEM
Document Type and Number:
WIPO Patent Application WO/2020/213701
Kind Code:
A1
Abstract:
A methane fermentation method whereby a methane-containing biogas can be produced from a raw material containing at least one of glycerin and a fatty acid glycerin ester, the method being characterized by comprising: a first separation step of mixing the raw material with an inorganic acid and separating the resultant mixture into a first oil component and a first glycerin-containing solution; a neutralization step of neutralizing the first glycerin-containing solution with an alkaline substance; a second separation step of separating a second oil component and a precipitated inorganic salt from the neutralized first glycerin-containing solution to produce a second glycerin-containing solution; and a fermentation step of carrying out methane fermentation using the second glycerin-containing solution. According to the present invention, it is possible to produce a methane-containing biogas from a waste material containing glycerin or a waste material containing a fatty acid glycerin ester with high efficiency. Furthermore, it is also possible to dramatically increase the rate of recovery of methane from a glycerin-containing waste material compared with the conventional methods.
Inventors:
KAJIMA HIROSHI (JP)
TACHIBANA MINEO (JP)
ABE TAKESHI (JP)
TACHIBANA MINEO (JP)
ABE TAKESHI (JP)
Application Number:
PCT/JP2020/016795
Publication Date:
October 22, 2020
Filing Date:
April 16, 2020
Export Citation:
Assignee:
BIOFUEL TECH RESEARCH CO LTD (JP)
KUBOTA ENV SERVICE CO LTD (JP)
KUBOTA ENV SERVICE CO LTD (JP)
International Classes:
C12P5/02; C02F11/04
Domestic Patent References:
| WO2019039531A1 | 2019-02-28 | |||
| WO2017174775A1 | 2017-10-12 |
Foreign References:
| CN103772149A | 2014-05-07 | |||
| JP2010065154A | 2010-03-25 |
Other References:
SILES LOPEZ, J. A. ET AL.: "Anaerobic digestion of glycerol derived from biodiesel manufacturing", BIORESOURCE TECHNOLOGY, vol. 100, 2009, pages 5609 - 5615, XP026469458, DOI: 10.1016/j.biortech.2009.06.017
TAKESHITA, TOSHIHIRO: "Application of Dilution and Neutralization to Recycling of Glycerol Waste Fluid Left after Manufacturing Bio-diesel Fuel", OLEOSCIENCE, vol. 17, no. 7, 2017, pages 305 - 311, XP055751568
TAKESHITA, TOSHIHIRO: "Application of Dilution and Neutralization to Recycling of Glycerol Waste Fluid Left after Manufacturing Bio-diesel Fuel", OLEOSCIENCE, vol. 17, no. 7, 2017, pages 305 - 311, XP055751568
Attorney, Agent or Firm:
HAYAKAWA Yuzi et al. (JP)
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