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Separation membrane diagnosis method, water processing method, separation membrane diagnosis device, water processing device and separation membrane diagnosis program

A diagnostic method and diagnostic program technology, applied in the field of separation membrane diagnosis, can solve the problems of reduced water treatment operation rate, increased labor costs, chemical costs, etc., and achieve the effect of reducing water treatment costs

Active Publication Date: 2018-09-28
MITSUBISHI CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the frequency of cleaning of the separation membrane increases, the operation rate of the water treatment will decrease due to the stop for cleaning.
In addition, if the number of cleanings increases, the labor costs of the workers who perform the cleaning work, the cost of chemicals for cleaning, and other costs will increase.

Method used

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  • Separation membrane diagnosis method, water processing method, separation membrane diagnosis device, water processing device and separation membrane diagnosis program
  • Separation membrane diagnosis method, water processing method, separation membrane diagnosis device, water processing device and separation membrane diagnosis program
  • Separation membrane diagnosis method, water processing method, separation membrane diagnosis device, water processing device and separation membrane diagnosis program

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Experimental program
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Embodiment approach

[0170] According to at least one embodiment described above, the separation membrane diagnosis method includes the acquisition step, the time-lapse recording step, the vibration analysis step, and the determination step, so as to accurately grasp the state of the separation membrane used for water treatment, thereby providing a A separation membrane diagnosis method for reducing water treatment costs, a water treatment method, a separation membrane diagnosis device, a water treatment device and a separation membrane diagnosis program, or a storage medium recording the program.

[0171]In addition, the above-mentioned device may also be realized by a computer. At this time, a program for realizing the function of each functional block is recorded on a computer-readable recording medium. It can also be realized by causing the computer system to read the program recorded on the recording medium and execute it by the CPU. The term "computer system" herein refers to a system inclu...

Embodiment 1

[0175] (Example 1) Figure 15 Indicates an example of predicting membrane fouling for MBR. Figure 15 It is a graph showing the transition of the membrane resistance R of the separation membrane 21 in the present embodiment, the band 1 contribution rate, and the band 2 contribution rate. From February 13th, the membrane resistance increased rapidly, and the operation was stopped on February 14th. A method of predicting the sharp increase using the transition of the Band 1 contribution rate will be described. In addition, here, the judgment of the sign of pollution is performed using the value of the band 1 contribution rate within 2 days. The calculation method of the band 1 contribution rate is as described above.

[0176] It can be judged that the water permeation state of the separation membrane is good if the value of the band 1 contribution rate does not remain below 60% for 2 days from the start of operation until February 9. The band 1 contribution rate continued to...

Embodiment 2

[0177] (Example 2) Figure 16 An example of predicting MBR membrane fouling in the same manner as in Example 1 is shown. Figure 16 This is an example of operation from June 1st to July 4th, and the film resistance rapid rise operation was stopped on July 4th. From June 1st to June 17th in the initial stage of operation, if the contribution rate of frequency band 1 is not continuously below 60% for 2 days, it can be judged that the water permeability of the separation membrane is good. Since June 17, the contribution rate of band 1 has continued to be 60% or less, and it can be judged that the state of the separation membrane is poor. From this, predictions of contamination can start about two weeks in advance.

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Abstract

Provided are a separation membrane diagnosis method, a water processing method, a separation membrane diagnosis device, a water processing device, a separation membrane diagnosis program, and a storage medium on which the program is stored, with which the cost of water processing can be reduced by accurately ascertaining the state of a separation member used in water processing. The separate membrane diagnosis method includes: an acquisition step for acquiring an indicator expressing the state of a separation membrane that performs solid-liquid separation; a change-over-time recording step forrecording the change over time of the acquired indicator; an oscillation analysis step for analyzing the oscillations of the recorded change over time; and a determination step for determining the water permeability state of the separation membrane on the basis of the analyzed oscillations.

Description

technical field [0001] The invention relates to a separation membrane diagnosis method, a water treatment method, a separation membrane diagnosis device, a water treatment device and a separation membrane diagnosis program. [0002] This application claims priority based on Japanese Patent Application No. 2016-017371 filed in Japan on February 1, 2016, and uses the contents thereof herein. Background technique [0003] Conventionally, a membrane separation activated sludge method (MBR: Membrane Bioreactor, Membrane Bioreactor) using a separation membrane for solid-liquid separation has been used for water treatment such as sewage. In the MBR, when the permeated water of the liquid is separated from the activated sludge, the adhered substances contained in the generated sludge accumulate on the surface of the separation membrane over time, or the permeation flow path of the separation membrane is blocked, causing the separation membrane to deteriorate. A phenomenon called fo...

Claims

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Application Information

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IPC IPC(8): B01D65/10B01D65/02G01N15/08
CPCB01D65/02B01D65/10G01N15/08B01D65/109
Inventor 石桥龙太郎沟越祐吾
Owner MITSUBISHI CHEM CORP
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