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Title:
PRODUCTION METHOD FOR BIOGAS USING USED SANITARY ARTICLES
Document Type and Number:
WIPO Patent Application WO/2021/075148
Kind Code:
A1
Abstract:
Provided is a biogas production method that enables efficient production of a biogas from waste matter derived from used sanitary articles. This method is for producing a biogas using waste matter derived from used sanitary articles containing highly water-absorbent polymers, pulp fibers, synthetic resin materials, and excreta. This method comprises a crushing step (S1) for crushing used sanitary articles in an inactivation aqueous solution that can inactivate highly water-absorbent polymers, a forming step (S2) for separating highly water-absorbent polymers, pulp fibers, and synthetic resin materials from the inactivation aqueous solution containing the crushed used sanitary articles, to form a treatment liquid containing a decomposition product of the highly water-absorbent polymers and excreta, and a biogas production step (S3) for producing a biogas using the treatment liquid.

Inventors:
KONISHI, Takayoshi (1531-7 Wadahama, Toyohama-cho, Kanonji-sh, Kagawa 02, JP)
KURITA, Noritomo (1531-7 Wadahama, Toyohama-cho, Kanonji-sh, Kagawa 02, JP)
Application Number:
JP2020/031496
Publication Date:
April 22, 2021
Filing Date:
August 20, 2020
Export Citation:
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Assignee:
UNICHARM CORPORATION (Kinsei-cho Shikokuchuo-sh, Ehime 11, JP)
International Classes:
B09B3/00; C02F11/04; C02F11/06
Attorney, Agent or Firm:
AOKI, Atsushi et al. (Toranomon Hills Mori Tower 23-1, Toranomon 1-chome, Minato-k, Tokyo 01, JP)
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