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Preparation method of dopamine composite ultrafiltration membrane

A dopamine and ultrafiltration membrane technology, applied in chemical instruments and methods, membranes, membrane technologies, etc., can solve the problems of inability to remove pollutants well, reduced biological method efficiency, and high processing costs, and achieves good processing results. water-enhancing effect

Inactive Publication Date: 2017-02-15
SHAANXI EYOUNG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to the characteristics of marine aquaculture wastewater, these methods have some shortcomings: physical methods can remove suspended solids, but cannot remove some dissolved pollutants well; chemical methods are better than physical methods in removing dissolved pollutants , but its treatment cost is relatively high; the efficiency of biological method is significantly reduced due to the high salinity of seawater
Compared with traditional mariculture wastewater treatment methods, membrane technology has the advantages of convenient operation and management and high efficiency, which can make up for the shortcomings of traditional processes in the treatment of mariculture wastewater, but the membrane fouling problem in the application of membrane technology has affected its popularization and application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A preparation method of a dopamine composite ultrafiltration membrane, comprising the following preparation steps:

[0020] (1) The polysulfone base membrane is fully rinsed with deionized water, soaked in clean deionized water for 24 hours;

[0021] (2) Rinse the soaked polysulfone-based membrane with deionized water to remove the remaining soaking solution on the membrane;

[0022] (3) Soak in isopropanol for 2-5 hours, then shake and wash in isopropanol for 1 hour. Isopropanol treatment can remove bacteria growing on the membrane and membrane-making raw materials remaining on the surface of the membrane or in the pores of the membrane;

[0023] (4) Wash off the isopropanol completely with deionized water, soak in deionized water for later use;

[0024] (5) Cut the polysulfone-based membrane soaked in deionized water into the size of the reaction pool, put it into the membrane reaction pool, add 50ml of 2g / L dopamine solution, quickly close the reaction pool and put ...

Embodiment 2

[0030] A preparation method of a dopamine composite ultrafiltration membrane, comprising the following preparation steps:

[0031] (1) The polysulfone base membrane is fully rinsed with deionized water, soaked in clean deionized water for 24 hours;

[0032] (2) Rinse the soaked polysulfone-based membrane with deionized water to remove the remaining soaking solution on the membrane;

[0033] (3) Soak in isopropanol for 2-5 hours, then shake and wash in isopropanol for 1 hour. Isopropanol treatment can remove bacteria growing on the membrane and membrane-making raw materials remaining on the surface of the membrane or in the pores of the membrane;

[0034] (4) Wash off the isopropanol completely with deionized water, soak in deionized water for later use;

[0035] (5) Cut the polysulfone-based membrane soaked in deionized water into the size of the reaction pool, put it into the membrane reaction pool, add 50ml of 2g / L dopamine solution, quickly close the reaction pool and put ...

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Abstract

The invention relates to a preparation method of a dopamine composite ultrafiltration membrane. The preparation method of the dopamine composite ultrafiltration membrane is characterized by comprising the following steps: washing polysulfone-based membrane thoroughly with deionized water; soaking in clean deionized water for 24 h; washing the soaked polysulfone-based membrane with the deionized water so as to remove the remaining soaking solution on the membrane; then soaking in isopropanol for 2 to 5 h; shaking-washing the soaked polysulfone-based membrane in the isopropanol for 1h, wherein the isopropanol treatment can remove both bacteria generated on the membrane and membrane preparation materials remaining on the surface or in the aperture gap of the membrane. The prepared dopamine composite ultrafiltration membrane has a contact angle of 63 degree which is reduced by 21 degree compared with the contact angle of basement-membrane, the hydrophilicity is significantly enhanced, and the treatment effect on mariculture wastewater is good.

Description

technical field [0001] The invention relates to a preparation method of a dopamine composite ultrafiltration membrane. Background technique [0002] In recent years, with the rapid development of the aquaculture industry, seawater factory aquaculture has increased dramatically in scale and quantity. If the seawater factory aquaculture wastewater is not effectively treated and discharged, it will inevitably pollute the adjacent sea water. At present, the methods for treating mariculture wastewater mainly include physical methods, chemical methods and biological methods, which mainly remove suspended solids (SS), ammonia nitrogen, chemical oxygen demand (COD), and biological oxygen demand (BOD) in wastewater. In order to meet the requirements of recycling or emission. According to the characteristics of mariculture wastewater, these methods have some shortcomings: physical methods can remove suspended solids, but cannot remove some dissolved pollutants well; chemical methods...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D69/12B01D69/02B01D71/68B01D67/00C02F1/44C02F9/04C02F101/16C02F103/08
CPCB01D69/125B01D67/0093B01D69/02B01D71/60B01D71/68B01D2325/36B01D2325/48C02F1/444C02F1/78C02F2101/16C02F2103/08C02F2209/08C02F2209/10C02F2209/14
Inventor 张俊
Owner SHAANXI EYOUNG TECH
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