Method for cleaning membrane pollution by utilizing singlet oxygen

A singlet oxygen and membrane fouling technology, applied in the field of membrane cleaning, can solve the problem of not effectively using singlet oxygen to clean the membrane, pollution, etc., and achieve the effects of avoiding unclean cleaning, convenient transportation and storage, and moderate price.

Active Publication Date: 2016-02-03
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, there is currently no method for effectively using singlet oxygen to clean membrane fouling

Method used

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  • Method for cleaning membrane pollution by utilizing singlet oxygen
  • Method for cleaning membrane pollution by utilizing singlet oxygen

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Experimental program
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specific Embodiment approach 1

[0020] Specific implementation mode 1: This implementation mode is a method for cleaning membrane fouling by using singlet oxygen, which is realized through the following steps:

[0021] 1. Put the contaminated membrane module to be cleaned into a pool filled with tap water;

[0022] 2. After mixing the catalyst and the oxidant according to the molar ratio of 1: (1-10), add it to the pool in step 1, stir evenly, control the peroxide concentration to 50-1000 mg / L, and soak for 30-180 minutes;

[0023] 3. Put the membrane module soaked in step 2 into another pool filled with tap water for rinsing, which means cleaning the membrane fouling with singlet oxygen; wherein, the catalyst is pyruvic acid, and the oxidant is peroxide oxide.

[0024] The principle of a method of utilizing singlet oxygen to clean membrane fouling in this embodiment is as follows: first, pyruvic acid catalyzes peroxide (peroxymonosulfate or percarbonate) to produce a diepoxy intermediate; then, diepoxide ...

specific Embodiment approach 2

[0026] Embodiment 2: This embodiment differs from Embodiment 1 in that the membrane material is polyvinylidene fluoride (PVDF), polyethersulfone (PES), polyethylene (PE) or polyvinyl chloride (PVC). Others are the same as in the first embodiment.

specific Embodiment approach 3

[0027] Embodiment 3: The difference between this embodiment and Embodiment 1 is that the peroxide is a mixture of one or more of persulfate and percarbonate in any ratio. Others are the same as in the first embodiment.

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Abstract

A method for cleaning membrane pollution by utilizing singlet oxygen relates to membrane cleaning methods. The membrane pollution cleaning method comprises adding a catalyst pyruvic acid and an oxidizing agent peroxide (a peroxymonosulfate or a percarbonate) into a pool holding a polluted membrane component, stirring, immersing, and then rinsing, so as to finished the process. A bisepoxy intermediate is generated by using pyruvic acid to catalyze the peroxide, and is further reacted with the peroxide for generating singlet oxygen and pyruvic acid, and the generated pyruvic acid continues to catalyze the peroxide and gives play to cyclic catalysis effect, the generated high-activity singlet oxygen can directly act on membrane-pollution biological cells, rapidly destroy enzyme structure, and reach the purpose of cleaning membrane pollution. The membrane cleaning effect is good, the method does not generate toxic or harmful side products, a waste liquid generated after cleaning can be directly discharged. Pyruvic acid and the peroxide are green, safe and free of toxic and side effects. Operation is simple and practicable.

Description

technical field [0001] The invention relates to a membrane cleaning method, in particular to a method for cleaning membrane contamination by using singlet oxygen. Background technique [0002] With the requirements for high separation and purification of substances, membrane filtration technology has emerged as the times require, and has become a new high separation, concentration, purification and purification technology. Due to its advantages of no phase change, low energy consumption, and clean system, it has been widely used in the fields of medicine, food, chemical industry, and water treatment, and has developed rapidly in countries all over the world. However, as the operating time of the membrane increases, the inorganic matter, suspended matter, organic matter and microorganisms in the raw material liquid to be treated will be adsorbed or deposited on the surface of the membrane or in the pores of the membrane through physical, chemical and mechanical interactions w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D65/06
Inventor 庞素艳鲁雪婷江进杨悦
Owner HARBIN UNIV OF SCI & TECH
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