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Patent Searching and Data


Title:
SEWAGE FILTRATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2021/059555
Kind Code:
A1
Abstract:
A sewage filtration device according to the present invention is provided with: a treatment tank; a sewage treatment unit which is provided within the treatment tank; a filtration layer which is provided onto the sewage treatment unit, while being configured from a floating filter medium that has a specific gravity of from 0.1 to 0.3 with respect to water; an air holding unit which is provided below the sewage treatment unit; an air supply pipe which is in communication with the air holding unit; a first air lift pump which extends from above the sewage treatment unit to the air holding unit, while penetrating through the filtration layer; and a water seal unit which is provided within the air holding unit, while being in communication with the first air lift pump. With respect to this sewage filtration device, the first air lift pump also serves as a raw water supply pipe, an air discharge pipe and a sludge discharge pipe at the same time.

Inventors:
KADOYOSHI HIRONORI (JP)
IINO HIRONARI (JP)
Application Number:
PCT/JP2020/008880
Publication Date:
April 01, 2021
Filing Date:
March 03, 2020
Export Citation:
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Assignee:
FUJITA CORP (JP)
International Classes:
C02F3/08; B01D24/00; B01D24/44; B01D29/94
Foreign References:
JP2010184210A2010-08-26
JPH08132082A1996-05-28
JP2010207662A2010-09-24
JPH0350969Y21991-10-31
US5770080A1998-06-23
Attorney, Agent or Firm:
TAKAHASHI, HAYASHI AND PARTNER PATENT ATTORNEYS, INC. (JP)
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