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A method for coupling MBR/MFC with PVDF/carbon fiber-based MFE2O4 type photocatalytic conductive filter membrane

A photocatalysis and carbon fiber technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve problems such as high energy consumption and membrane pollution, and achieve the effect of improving sewage treatment efficiency

Active Publication Date: 2018-04-10
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved in the present invention is to prepare a kind of MFe 2 o 4 Type photocatalyst-supported carbon fiber base / PVDF photocatalytic conductive filter membrane, and the membrane is used in the cathode to treat sewage under the drive of microbial fuel cell electricity generation and assist photocatalysis and MBR to achieve efficient treatment of wastewater

Method used

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  • A method for coupling MBR/MFC with PVDF/carbon fiber-based MFE2O4 type photocatalytic conductive filter membrane
  • A method for coupling MBR/MFC with PVDF/carbon fiber-based MFE2O4 type photocatalytic conductive filter membrane
  • A method for coupling MBR/MFC with PVDF/carbon fiber-based MFE2O4 type photocatalytic conductive filter membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Weigh 0.90g FeCl 3 ·6H 2 O and 0.40 g CoCl 2 ·6H 2 O, add 50mL of ethylene glycol and 20mL of 5mol / L NaOH solution in sequence, stir evenly and ultrasonicate for 5min, then pour the solution into a glass dish dedicated to microwave, and heat it with microwave until the solvent is completely evaporated to obtain CoFe 2 o 4 nanoparticles. The combined product has magnetic characteristics, and the product is washed with deionized water to remove ionic impurities, and then suction-filtered with an aqueous phase filter membrane. The resulting solid is placed in a vacuum oven for drying to obtain pure CoFe 2 o 4 nanoparticles.

[0026] Add 0.2g of carbon powder to the 5% PVDF casting solution, stir well, then add 0.1g of CoFe 2 o 4 , after stirring evenly, let it defoam and stand still, lay a piece of carbon fiber cloth (thickness is about 250 μm) on a flat glass plate, coat a 200 μm PVDF membrane on its surface, immerse in deionized water for phase inversion overnig...

Embodiment 2

[0029] Weigh 0.90g FeCl 3 ·6H 2 O and 0.23 g CoCl 2 ·6H 2 O, add 100mL of ethylene glycol and 5mL of 13mol / L NaOH solution in turn, stir evenly and ultrasonically for 20min, then pour the solution into a glass dish, heat with microwave until the solvent evaporates completely, and obtain CoFe 2 o 4 nanoparticles. The combined product has magnetic characteristics, and the product is washed with deionized water to remove ionic impurities, and then suction-filtered with an aqueous phase filter membrane. The resulting solid is placed in a vacuum oven for drying to obtain pure CoFe 2 o 4 nanoparticles.

[0030]In the 16% PVDF casting solution, add 2g of carbon powder, stir evenly, and then add 2g of CoFe 2 o 4 , after stirring evenly, defoaming and standing still, lay a piece of carbon fiber cloth (thickness about 250 μm) on a flat glass plate, coat a 2000 μm PVDF membrane on its surface, immerse in deionized water for phase inversion overnight, and obtain PVDF / carbon fibe...

Embodiment 3

[0033] Weigh 0.90g FeCl 3 ·6H 2 O and 0.48 g CoCl 2 ·6H 2 O, add 80mL of ethylene glycol and 8mL of 7.5mol / L NaOH solution in turn, stir evenly, place in an ultrasonic cell pulverizer for 15 minutes of ultrasonication, then pour the solution into a microwave-specific glass dish, and heat with microwave until the solvent is completely evaporated to obtain CoFe 2 o 4 nanoparticles. The combined product has magnetic characteristics, and the product is washed with deionized water to remove ionic impurities, and then suction-filtered with an aqueous phase filter membrane. The resulting solid is placed in a vacuum oven for drying to obtain pure CoFe 2 o 4 nanoparticles.

[0034] In 10% PVDF casting solution, add 0.3g carbon powder, stir evenly, then add 0.1-0.3g CoFe 2 o 4 , after stirring evenly, defoaming and standing still, lay a carbon fiber cloth (thickness about 250 μm) on a flat glass plate, coat a 300 μm PVDF membrane on its surface, immerse in deionized water for ...

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Abstract

The invention belongs to the fields of new energy and environment pollution control and discloses a method for coupling of a PVDF / carbon fiber-based MFe2O4 photocatalysis conductive filtering membrane and MBR / MFC. The membrane is used as the cathode of a microbial fuel cell (MFC), pollutant removal efficiency is improved through the cathode and photocatalysis under the powder generation driving of a biological anode, and finally membrane filtration is conducted to discharge water to achieve energy-efficient treatment of wastewater. A method for preparing the PVDF / carbon fiber-based MFe2O4 photocatalysis conductive filtering membrane comprises the steps of adding carbon nano powder and MFe2O4 photocatalyst to PVDF casting membrane solution in sequence, coating the surface of a carbon fiber cloth with the mixture by a certain thickness, and preparing the PVDF / carbon fiber-based MFe2O4 photocatalysis conductive filtering membrane with the phase inversion method. In an H type MFC, by placing the membrane on the cathode of the cell, energy-efficient treatment of wastewater can be achieved through biological power generation, photocatalysis and membrane filtration.

Description

technical field [0001] The invention belongs to the field of new energy and environmental pollution control, in particular relates to the coupling of biological photocatalysis and filter membrane to realize efficient treatment of sewage, and proposes a method for preparing MFe 2 o 4 A method for treating wastewater with a photocatalytic conductive filter membrane in an MBR / MFC system. Background technique [0002] Membrane Bioreactor (MBR) is a common secondary treatment technology in the field of wastewater treatment at present, but the two bottlenecks of membrane fouling and high energy consumption have seriously affected its wide application. In recent years, studies have been conducted on the coupling of microbial fuel cells (MFC) and MBR to prepare conductive membranes as cathodes, which can greatly reduce the degree of membrane fouling, improve the anti-fouling performance of the membrane and prolong its service life. Moreover, when MFC is used for sewage treatment, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D71/34B01D71/02B01D69/02B01D67/00B01J23/75C02F3/00
CPCB01D67/0079B01D69/02B01D71/02B01D71/34B01D2325/26B01J23/75B01J35/0013B01J35/0033B01J35/004C02F3/005C02F2305/10
Inventor 柳丽芬李益华杨凤林高常飞
Owner DALIAN UNIV OF TECH
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