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Sewage treatment membrane with high decontamination efficiency and preparation method of sewage treatment membrane

A high-efficiency technology for sewage treatment, applied in water/sludge/sewage treatment, water/sewage treatment, adsorbed water/sewage treatment, etc. The effect of dots, large specific surface area, excellent porous structure and high dispersibility

Active Publication Date: 2019-12-06
苏州清溪环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the application mainly utilizes physical adsorption to recover insoluble suspended pollutants in sewage through physical separation, there are defects of single treatment method and insufficient treatment efficiency.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0052] The preparation method of the sewage treatment membrane is as follows:

[0053] Step S1, dissolving polyethersulfone resin, modified polymer and porogen in N,N-dimethylformamide, first raising the temperature to 65°C, and stirring at a constant temperature of 65°C for 110-120min;

[0054] Step S2, adding functional fillers, ultrasonicating for 15-20 minutes at a constant temperature of 65°C, and then continuing mechanical stirring for 110-120 minutes;

[0055] Step S3, standing still for 4-6h to degas to obtain the casting solution;

[0056] Step S4, apply the casting solution on the carrier, put it into deionized water at 25°C to solidify into a phase, soak for 24 hours, and perform phase separation to obtain a sewage treatment membrane; wherein, the carrier is a polytetrafluoroethylene plate;

[0057] The polyethersulfone membrane made of porogen PEG2000 has a pore size range of 10-60nm, which is much smaller than the particle size of emulsified oil and suspended sol...

Embodiment 1

[0061] The functional filler is prepared by the following method:

[0062] (1) Put urea in a crucible, put it into a muffle furnace, raise the temperature up to 550°C at a rate of 5°C / min, keep it warm for 2 hours, and cool it down to room temperature to prepare graphite phase carbon nitride;

[0063] (2) According to the solid-to-liquid ratio of 1g: 10mL, put the graphite phase carbon nitride prepared above into deionized water, ultrasonically disperse, and take the system out every 20 minutes to cool down to room temperature. carbon;

[0064] (3) Dissolve the pretreated carbon nitride in ethylene glycol according to the solid-to-liquid ratio of 1g:40mL to form the first solution;

[0065] (4) Weigh the mixture of bismuth nitrate pentahydrate and thiourea according to the solid-to-liquid ratio of 50 mg: 30 mL, add it to 40 mL of ethylene glycol, and ultrasonically treat it for 25 minutes until it is completely dissolved to form the second solution;

[0066] The mol ratio of...

Embodiment 2

[0069] The functional filler is prepared by the following method:

[0070] (1) Put urea in a crucible, put it into a muffle furnace, raise the temperature up to 550°C at a rate of 5°C / min, keep it warm for 2 hours, and cool it down to room temperature to prepare graphite phase carbon nitride;

[0071] (2) According to the solid-to-liquid ratio of 1g: 14mL, put the graphite phase carbon nitride prepared above into deionized water, ultrasonically disperse, and take the system out every 20 minutes to cool down to room temperature. carbon;

[0072] (3) Dissolve the pretreated carbon nitride in ethylene glycol according to the solid-to-liquid ratio of 1g:50mL to form the first solution;

[0073] (4) Weigh the mixture of bismuth nitrate pentahydrate and thiourea according to the solid-to-liquid ratio of 50 mg: 40 mL, add it to 40 mL of ethylene glycol, and ultrasonically treat it for 35 minutes until it is completely dissolved to form the second solution;

[0074] The mol ratio of...

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Abstract

The invention discloses a sewage treatment membrane with high decontamination efficiency. The sewage treatment membrane is prepared from the following raw materials in parts by weight: 60 to 70 partsof polyethersulfone resin, 4 to 6 parts of a functional filler, 9 to 11 parts of a modification polymer, 20 to 24 parts of a pore-forming agent and 400 to 500 parts of N,N-dimethylformamide. The invention also discloses a preparation method of the sewage treatment membrane. The sewage treatment membrane provided by the invention is a polyethersulfone membrane prepared by using the pore-forming agent, not only has high acid and alkali resistance, but also has good retention performance; the polyethersulfone resin is modified by the modification polymer, a stable hydration layer can be formed onthe surface of the membrane, a low-adhesion micro region can be formed, excellent pollution release self-cleaning ability is given to the membrane surface without affecting the flux of the membrane,so that the decontamination efficiency of the membrane can be improved; and the functional filler is added into raw materials of the membrane, and the filler can not only exert physical and chemical adsorption, but also play a photocatalytic effect, has stronger sewage treatment capacity, and effectively improves the treatment efficiency of the membrane.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a sewage treatment membrane with high pollution removal efficiency and a preparation method thereof. Background technique [0002] The discharge of sewage has caused serious pollution to the environment. Some sewage discharges not only pollute surface water, but also pollute groundwater sources, and even affect people's lives and life safety. Therefore, sewage treatment is of great significance. There are many methods of sewage treatment. There are physical methods, which mainly separate and remove insoluble suspended pollutants in wastewater through physical action, such as screening and retention, centrifugal separation, etc.; there are chemical methods, which are separated by chemical reactions. Pollutants in dissolved or colloidal state in water, such as coagulation method, redox method, etc.; there are biological methods, which use the metabolism of micr...

Claims

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Application Information

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IPC IPC(8): B01D69/02B01D71/68B01D67/00C02F1/44C02F1/28C02F1/30C02F1/72C02F101/20C02F101/30
CPCB01D67/0079B01D69/02B01D71/68B01D2325/10B01D2325/12B01D2325/30C02F1/281C02F1/30C02F1/44C02F1/725C02F2101/20C02F2101/30C02F2303/14C02F2305/023C02F2305/10
Inventor 骆瑜
Owner 苏州清溪环保科技有限公司
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