Title:
METHOD AND APPARATUS FOR ANAEROBIC TREATMENT OF ORGANIC WASTEWATER
Document Type and Number:
WIPO Patent Application WO/2023/153026
Kind Code:
A1
Abstract:
Provided are an anaerobic treatment method and an anaerobic treatment apparatus, each of which is configured such that organic wastewater is subjected to a methane fermentation treatment in an anaerobic reaction vessel 1 and sludge in the anaerobic reaction vessel 1 is subjected to membrane filtration through a membrane module 4 to produce treated water, in which the membrane is subjected to alkaline washing when a converted flux decreases and reaches a predetermined value when a transmembrane pressure difference during the membrane filtration increases and reaches a predetermined value, and the membrane is subjected to acid washing when a rate of increase in a logarithmic value of the transmembrane pressure difference or a rate of decrease in a logarithmic value of the converted flux reaches a predetermined value.
Inventors:
KOMATSU KAZUYA (JP)
UCHIDA HIROKI (JP)
UCHIDA HIROKI (JP)
Application Number:
PCT/JP2022/039449
Publication Date:
August 17, 2023
Filing Date:
October 24, 2022
Export Citation:
Assignee:
KURITA WATER IND LTD (JP)
International Classes:
B01D63/06; B01D65/02; B01D65/06; B01D69/04; C02F1/44; C02F3/28
Domestic Patent References:
| WO2017014298A1 | 2017-01-26 |
Foreign References:
| JP2013056321A | 2013-03-28 | |||
| JP2014124579A | 2014-07-07 | |||
| JP2004230222A | 2004-08-19 | |||
| JP2019202305A | 2019-11-28 | |||
| JP2015071155A | 2015-04-16 | |||
| US20180346858A1 | 2018-12-06 | |||
| CN215161380U | 2021-12-14 | |||
| JP2015229146A | 2015-12-21 |
Attorney, Agent or Firm:
SHIGENO, Tsuyoshi et al. (JP)
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