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Enzyme-containing alkaline membrane cleaning agent and application thereof

A cleaning agent and alkaline membrane technology, applied in the field of membrane cleaning, can solve the problems of good cleaning recovery effect, high cleaning concentration, damage, etc., and achieve the effects of low cleaning maintenance cost, high cleaning recovery rate, and good chemical safety

Inactive Publication Date: 2019-05-07
SANDA FILM SCI & TECH XIAMEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Conventional chemical cleaning agents such as alkali and acid can be used to clean lightly polluted membrane modules, but for serious membrane fouling in the biomedicine and food industries, it is difficult to completely restore membrane performance through physical cleaning, and a single chemical cleaning agent It is also difficult to have a good effect on the combined pollution of different components, often requiring multiple steps of multiple reagents for repeated cleaning, high cost and low efficiency, and no satisfactory cleaning effect can be obtained
Aiming at the complex and heavy fouling of the membrane application process in the biomedicine and food industries, there is no compound enzyme-containing alkaline membrane cleaning agent on the market that is highly targeted, has good cleaning and recovery effects, low cost, and short cleaning time.
[0005] At present, the problems of conventional cleaning agents used in biomedicine and food industry membrane cleaning are as follows: 1. When the expected effect is achieved, the cleaning concentration must be high, the cleaning time is long, repeated cleaning is required, and the maintenance cost of membrane equipment is high
2. The complex pollution sources in the biomedicine and food industries are not highly targeted, the cleaning effect is not ideal, and the membrane cleaning recovery rate is low
3. Long cleaning time and low cleaning recovery rate affect the user's production cycle and maintenance cost
4. Commercially available conventional alkaline cleaning agents often contain oxidizing components, which cause irreversible damage to membrane components such as polyamide composite membranes and cellulose materials, and affect the service life of the membranes

Method used

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  • Enzyme-containing alkaline membrane cleaning agent and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] An enzyme-containing alkaline film cleaning agent, the mass percentage of its components is 30% sodium hydroxide, 30% AEO-7 surfactant, 10% sodium citrate, 20% sodium tripolyphosphate, 10% protease, and The preparation method is as follows:

[0033] (1) Take each component by weighing;

[0034] (2) Fully mix the components except the enzyme preparation;

[0035] (3) adding an enzyme preparation to the material obtained in step (2) while stirring, and then passing through a sieve to obtain the enzyme-containing alkaline membrane cleaning agent.

[0036] Prepare the above enzyme-containing alkaline membrane cleaning agent into an aqueous solution with a concentration of 0.3-0.5 wt%, and then clean the membrane module, as follows:

[0037] The polluted membrane core used in this example is the nanofiltration membrane core in the erythromycin fermentation broth, and its pollution characteristics: the flux drops by 70%. As a new separation technology, membrane treatment i...

Embodiment 2

[0044] An enzyme-containing alkaline film cleaning agent, the mass percentage of its components is 45% sodium hydroxide, 25% AEO-9 surfactant, 10% EDTA, 15% potassium pyrophosphate, and 5% protease. Its preparation method is as follows:

[0045] (1) Take each component by weighing;

[0046] (2) Fully mix the components except the enzyme preparation;

[0047] (3) adding an enzyme preparation to the material obtained in step (2) while stirring, and then passing through a sieve to obtain the enzyme-containing alkaline membrane cleaning agent.

[0048] Prepare the above enzyme-containing alkaline membrane cleaning agent into an aqueous solution with a concentration of 0.1 to 0.3 wt%, and then clean the membrane core, as follows:

[0049] The polluted membrane core used in this example is the nanofiltration membrane core in the gibberellin fermentation broth. Its pollution characteristics: the membrane flux drops rapidly, and the water flux continues to decline after operation. By...

Embodiment 3

[0056] A kind of enzyme-containing alkaline film cleaning agent, the mass percent of its components is sodium carbonate 45%, AEO-9 surfactant 25%, EDTA 10%, potassium pyrophosphate 15%, protease 5%, and its preparation method is as follows:

[0057] (1) take each component;

[0058] (2) Fully mix the components except the enzyme preparation;

[0059] (3) adding an enzyme preparation to the material obtained in step (2) while stirring, and then passing through a sieve to obtain the enzyme-containing alkaline membrane cleaning agent.

[0060] The above enzyme-containing alkaline membrane cleaning agent is formulated into an aqueous solution with a concentration of 0.5 to 1 wt%, and then the roll-type ultrafiltration membrane is cleaned, as follows:

[0061] The polluted membrane core used in this example is a roll-type ultrafiltration membrane core in the amino acid fermentation liquid. Its pollution characteristics: the membrane flux drops rapidly, and the water flux continues...

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Abstract

The invention discloses an enzyme-containing alkaline membrane cleaning agent and an application thereof. The enzyme-containing alkaline membrane cleaning agent is composed of the following componentsin percentage by weight: 30-50% of an inorganic alkali, 20-30% of a surfactant, 5-10% of a complexing agent, 10-20% of a builder and 5-10% of an enzyme preparation. The alkaline enzyme-containing membrane cleaning agent disclosed by the invention can be used for cleaning membrane components polluted by various materials, and the flux of the membrane components can be rapidly and effectively recovered.

Description

technical field [0001] The invention belongs to the technical field of membrane cleaning, and in particular relates to an enzyme-containing alkaline membrane cleaning agent and application thereof. Background technique [0002] Membrane separation is a method that uses an inorganic or polymer material with a unique selective separation function as the separation layer, and uses external energy as the driving force to separate, fractionate or enrich the components in the fluid. Membrane technology is widely used in the field of biopharmaceuticals, such as the separation and filtration of various fermentation broths, and the concentration of antibiotics. Membrane technology has also been successfully applied to the recovery of protein in whey, milk deep processing, juice clarification, enzyme extraction, plant protein recovery, beer dregs recovery, sugar concentration and so on. Therefore, as a high-tech separation technology, membrane separation has unique technical advantag...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D65/02
Inventor 方永珍姚萌洪昱斌钟文德蓝伟光
Owner SANDA FILM SCI & TECH XIAMEN
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