Title:
METHOD FOR OPERATING SEPARATION MEMBRANE, SEPARATION MEMBRANE DEVICE, AND PROGRAM FOR DETERMINING OPERATING CONDITIONS OF SEPARATION MEMBRANE
Document Type and Number:
WIPO Patent Application WO/2023/127818
Kind Code:
A1
Abstract:
A method for operating a separation membrane in which a liquid being filtered is subjected to filtration to obtain filtered water, the method comprising: a cumulative amount calculation step for calculating the amount of constituent components in a liquid being filtered that accumulate in a separation membrane, said constituent components accumulating on the surface and in pores of the separation membrane once an initial value for the amount of constituent components is set, and the calculation being carried out according to the initial value for the amount of constituent components of the liquid being filtered, a change over time in the constituent components of the liquid being filtered once the initial value is set, a change over time in the amount of constituent components, and a change over time in operating conditions of the separation membrane; a chemical solution cleansing effect calculation step for calculating the cumulative amount of constituent components in cleansing with a chemical solution, or the state of recovery of membrane filtration resistance in said cleansing, on the basis of the result of calculating the cumulative amount; and a chemical solution cleansing condition determination step for determining conditions for the cleansing with a chemical solution on the basis of the results obtained in the cumulative amount calculation step and the chemical solution cleansing effect calculation step.
Inventors:
HAMADA HIROSHI (JP)
HAGAWA KAZUKI (JP)
KOBAYASHI TAKUMI (JP)
HAGAWA KAZUKI (JP)
KOBAYASHI TAKUMI (JP)
Application Number:
PCT/JP2022/047974
Publication Date:
July 06, 2023
Filing Date:
December 26, 2022
Export Citation:
Assignee:
TORAY INDUSTRIES (JP)
International Classes:
B01D65/06
Domestic Patent References:
| WO2009054506A1 | 2009-04-30 |
Foreign References:
| JP2008142675A | 2008-06-26 | |||
| JP2007038212A | 2007-02-15 |
Attorney, Agent or Firm:
EIKOH, P.C. (JP)
Download PDF:
Previous Patent: SUBSTRATE TREATMENT METHOD AND PLASMA TREATMENT METHOD
Next Patent: COMPOSITE SEMIPERMEABLE MEMBRANE
Next Patent: COMPOSITE SEMIPERMEABLE MEMBRANE