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A dynamic membrane sewage direct filtration reactor based on different sewage water quality and its operation method

A dynamic membrane and reactor technology, applied in chemical instruments and methods, osmotic/dialysis water/sewage treatment, membrane technology, etc., can solve problems such as increasing the dosage of coagulants, affecting process operation and maintenance, and increasing treatment costs. , to achieve the effect of saving treatment costs, controlling membrane pollution, and low cost and energy consumption

Active Publication Date: 2018-12-04
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This patent is a representative technology of dynamic membrane technology applied to sewage direct filtration. The disadvantages are: (1) Adding coagulant increases the treatment cost, especially for low turbidity sewage, the dosage of coagulant increases significantly ;(2) The use of coagulants, especially organic polymers, can easily lead to irreversible membrane fouling, which affects the operation and maintenance of the process; (3) The residual coagulants in the production may cause potential reuse risks

Method used

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  • A dynamic membrane sewage direct filtration reactor based on different sewage water quality and its operation method

Examples

Experimental program
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Effect test

Embodiment 1

[0046] like figure 1 As shown, the high turbidity sewage (turbidity is 300-400NTU) is pumped into the sewage regulating tank 3 through the water inlet pipe 1, the stirring device 2 is started, the electric valve 4 is started (the electric valve 5 is closed), and the sewage is poured into the sewage through the lift pump 6 Dynamic membrane filtration reactor 10, now the aeration device 7 is opened, and the gas flow meter 8 is adjusted to a low aeration rate (1-2m 3 / m 2 h), the sewage passes through the dynamic membrane module 11, and flows to the outlet pipe 12 under the action of the water level pressure difference (10-10.5cm), and the initial produced water returns to the sewage regulating tank 3 due to high turbidity. Below 10NTU, the flux is at (20-80L / m 2 h). After the dynamic film is formed, adjust the gas flow meter 8 to a high aeration rate (4-6m 3 / m 2 h), continuously flush the surface of the membrane module, and the reactor runs stably for more than 6 hours. The...

Embodiment 2

[0048] like figure 1 As shown, the low turbidity sewage (turbidity is 70NTU) is pumped into the sewage regulating tank 3 by the water inlet pipe 1, the stirring device 2 is closed, the electric valve 5 is started (the electric valve 4 is closed), and the sedimentation sewage (the turbidity reaches 350-450NTU left and right) into the dynamic membrane filtration reactor 10 through the lifting pump 6, and now the aeration device 7 is opened, and the gas flow meter 8 is adjusted to a low aeration rate (1-2m 3 / m 2 h), the sewage passes through the dynamic membrane module 11, and flows to the outlet pipe 12 under the action of the water level pressure difference (10-10.5cm), and the initial produced water returns to the sewage regulating tank 3 due to high turbidity, and after 30-40 minutes of such circulation, the turbidity Below 10NTU, the flux is at (20-80L / m 2 h). After the dynamic film is formed, start the stirring device 2 to ensure that the sewage in the sewage regulating...

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Abstract

The invention relates to a dynamic membrane sewage direct filtration reactor based on different sewage water quality and its operation method, which utilizes the inherent suspended matter in the sewage to form a dynamic membrane on the surface of a macroporous membrane support material for direct filtration and concentration of sewage, and the produced water can be To meet the urban sewage reuse landscape irrigation water standards, the concentrated liquid is discharged into the municipal pipe network or further processed for reuse; based on the different suspended solids content in the sewage, it can be used: (1) Under the condition of high turbidity raw water, open the sewage adjustment tank The stirring device in the pump, the sewage is injected into the dynamic membrane filtration reactor through the lifting pump until the turbidity is lower than 10NTU, the formation of the dynamic membrane is completed, the initial effluent returns to the sewage adjustment tank, and then the normal operation produces water; (2) low turbidity Under raw water conditions, turn off the stirring device in the sewage regulating tank, and pump the sedimented sewage into the dynamic membrane filtration reactor. The dynamic membrane formation process is the same as (1). After the dynamic film is formed, turn on the stirring device in the sewage regulating tank, and then run the production normally. water.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to a dynamic membrane sewage direct filtration reactor and an operation method based on different sewage water qualities. Background technique [0002] Recently, water environment pollution and water resource shortage have seriously affected people's daily life and the development of the national economy. Sewage regeneration treatment and reuse is an important measure of widespread concern, and the application of membrane separation technology is increasing day by day. [0003] When membrane separation technology is applied to secondary treatment and advanced treatment of sewage, there are problems of long process, high investment, high energy consumption, and high operation and maintenance costs. The application of membrane separation technology (microfiltration or ultrafiltration) to the direct filtration of raw sewage has been explored by researchers at home ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/44B01D63/08B01D65/02
CPCB01D63/08B01D65/02B01D2321/04B01D2321/16C02F1/44C02F2001/007
Inventor 胡以松王晓昌杨媛
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY