Systems, methods, and devices for optimization of ultra filtration membrane performance for water treatment using artificial intelligence and optimization algorithms

Patent metadata

Field	Value
Publication number	US-2023398498-A1
Application number	US-202217749814-A
Country	US
Kind code	A1
Filing date	May 20, 2022
Priority date	May 20, 2022
Publication date	Dec 14, 2023
Grant date	—

Abstract

A method of implementing membrane cleaning is provided. The method includes accessing a membrane resistance record, where the membrane resistance record includes a plurality of membrane resistance curves, each of the plurality of membrane resistance curves includes a curve profile after a cleaning. The method further includes performing a first cleaning, determining a first membrane resistance after the first cleaning, determining a current position on the curve profile based on the first membrane resistance and a time period from a previous cleaning, and performing a second cleaning. The second cleaning may include a recovery cleaning when the current position on the curve profile exceeds a predetermined range, and a maintenance cleaning when the current position on the curve profile is within the predetermined range.

First claim

1 . A method of implementing membrane cleaning, the method comprising:
accessing a membrane resistance record, wherein the membrane resistance record comprises a plurality of membrane resistance curves that form a curve profile that predicts membrane resistance of a membrane during a membrane operation mode, after a maintenance cleaning, and after a recovery cleaning based on computer models trained with data associated with the membrane operation mode, the maintenance cleaning, and the recovery cleaning; performing, by equipment, a first cleaning of the membrane; generating, by at least one sensor, sensor data indicative of a first membrane resistance of the membrane after the first cleaning; determining, based on the sensor data from the at least one sensor, the first membrane resistance; determining a current position on the curve profile based on the first membrane resistance; and performing, by the equipment, a second cleaning of the membrane, wherein the second cleaning includes a recovery cleaning of the membrane when the current position on the curve profile exceeds a predetermined membrane resistance range, and a maintenance cleaning of the membrane when the current position on the curve profile is within the predetermined membrane resistance range.

2 . The method of claim 1 , wherein determining the first membrane resistance after the first cleaning is based on first data associated with the first cleaning, wherein the first data includes information associated with at least one of: a membrane resistance of the membrane before the first cleaning, chemical concentrations associated with the first cleaning, flux associated with the first cleaning, and total permeate volume associated with the first cleaning.

3 . The method of claim 1 , wherein the predetermined membrane resistance range is determined based on at least one of transmembrane pressure (TMP) asserted on a membrane and flux information associated with the first cleaning.

4 . The method of claim 1 , further comprising determining a second membrane resistance of the membrane after the second cleaning based on second data associated with the second cleaning, wherein the second data includes membrane resistance of the membrane before the second cleaning, chemical concentrations associated with the second cleaning, flux associated with the second cleaning, and total permeate volume associated with the second cleaning.

5 . The method of claim 1 , further comprising:
training the computer models with the data associated with the membrane operation mode, the maintenance cleaning, and the recovery cleaning; and generating the membrane resistance record based on the trained computer models.

6 . The method of claim 1 , wherein each of the plurality of membrane resistance curves is obtained by calculating membrane resistance of the membrane at a flux at a predetermined time interval, and by using a regression model.

7 . The method of claim 1 , further comprising simulating a plurality of membrane resistance records for a predetermined future period based on the first membrane resistance, a second membrane resistance of the membrane determined after the second cleaning, and the plurality of membrane resistance curves.

8 . The method of claim 7 , further comprising determining a chemical cleaning implementation for the predetermined future period based on the plurality of membrane resistance records, wherein the chemical cleaning implementation includes a chemical cleaning schedule and chemical cleaning concentrations.

9 . The method of claim 8 , wherein determining the chemical cleaning implementation for the predetermined future period includes:
performing use optimization associated with each of the plurality of membrane resistance records; and determining the chemical cleaning implementation based on comparison of a cost associated with each of the plurality of membrane resistance records.

10 . The method of claim 9 , wherein performing the use optimization associated with each of the plurality of membrane resistance records is based on a set of considerations associated with the first cleaning, the second cleaning, and the chemical cleaning implementation for the predetermined future period, wherein the set of considerations comprises, for each of the cleanings:
a first consideration associated with energy consumption during the membrane operation mode; and a second consideration including at least one of energy consumption and chemical costs associated with a chemical cleaning concentration.

11 . The method of claim 1 , wherein the first cleaning includes a maintenance cleaning or a recovery cleaning.

12 . The method of claim 1 , wherein each of the first membrane resistance and a second membrane resistance of the membrane determined after the second cleaning includes at least one of a membrane fouling resistance and a membrane initial resistance.

13 . A device comprising:
a processor; and a memory coupled with the processor, wherein the memory stores instructions that, when executed by the processor, enables the processor to: access a membrane resistance record, wherein the membrane resistance record comprises a plurality of membrane resistance curves that form a curve profile that predicts membrane resistance of a membrane during a membrane operation mode, after a maintenance cleaning, and after a recovery cleaning based on computer models trained with data associated with the membrane operation mode, the maintenance cleaning, and the recovery cleaning; send a control signal to equipment that instructs the equipment to perform a first cleaning, wherein the first cleaning includes a maintenance cleaning or a recovery cleaning; receive, from at least one sensor over a communication network, sensor data indicative of a first membrane resistance of the first membrane after the first cleaning; determine, based on the received sensor data, the first membrane resistance; determine a current position on the curve profile based on the first membrane resistance; and send a control signal to the equipment that instructs the equipment to perform a second cleaning, wherein the second cleaning includes:
a recovery cleaning when the current position on the curve profile exceeds a predetermined membrane resistance range; and
a maintenance cleaning when the current position on the curve profile is within the predetermined membrane resistance range.

14 . The device of claim 13 , wherein determining the first membrane resistance after the first cleaning is based on first data associated with the first cleaning, wherein the first data includes information associated with at least one oft a membrane resistance of the membrane before the first cleaning, chemical concentrations, flux associated with the first cleaning, and total permeate volume associated with the first cleaning.

15 . The device of claim 13 , wherein the predetermined membrane resistance range is determined based on at least one of transmembrane pressure (TMP) asserted on a membrane and flux information associated with the first cleaning.

16 . The device of claim 13 , wherein the instructions are further executable by the processor to determine a second membrane resistance of the membrane after the second cleaning based on second data associated with the second cleaning, wherein the second data includes membrane resistance of the membrane before the second cleaning, chemical concentrations associated with the second cleaning, flux associated with the second cleaning, and total permeate volume associated with the second cleaning.

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Assignees

• Yokogawa Electric Corp

Inventors

• Faramarzi Mahdi
• Sivaprakasam Gokula Krishnan
• Ghosh Kaushik
• Matsui Yasuhiro

Classifications

• B01D2321/16

  Use of chemical agents · CPC title

• B01D65/02 Primary

  Membrane cleaning or sterilisation {; Membrane regeneration} · CPC title

• B01D2321/40

  Automatic control of cleaning processes · CPC title

• B01D61/145

  Ultrafiltration · CPC title