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Dynamic membrane sewage direct filtering reactor based on different sewage qualities and operation method

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

Active Publication Date: 2016-10-12
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • 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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  • Dynamic membrane sewage direct filtering reactor based on different sewage qualities and operation method

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Effect test

Embodiment 1

[0046] Such as 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. ...

Embodiment 2

[0048] Such as figure 1 As shown, the low turbidity sewage (turbidity is 70NTU) is pumped into the sewage regulating tank 3 from 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 the high turbidity. 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 regul...

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Abstract

The invention relates to a dynamic membrane sewage direct filtering reactor based on different sewage qualities and an operation method. According to the dynamic membrane sewage direct filtering reactor, a dynamic membrane is formed on the surface of a macropore membrane support material by virtue of inherent suspended solids in sewage, the dynamic membrane can be adopted for direct filtration and concentration on sewage, produced water can meet the standard of city sewage recycling landscape irrigation water, and a concentrated liquid can be discharged into a municipal pipe network or is further treated and recycled; on the basis of different contents of suspended solids in sewage, the operation method comprises the following steps: (1) under a high-turbidity raw water condition, powering on a stirring device in a sewage regulating pond, pumping the sewage into a dynamic membrane filtering reactor by using a lifting pump till the turbidity is less than 10 NTU to form a dynamic membrane, feeding back primary effluent to the sewage regulating pond, and carrying out normal operation to generate water; (2) under a low-turbidity raw water condition, powering off the stirring device in the sewage regulating pond, pumping settled sewage into the dynamic membrane filtering reactor by using the lifting pump so as to form the dynamic membrane in a manner the same as that of the process (1), after the dynamic membrane is formed, powering on the stirring device in the sewage regulating pond, and subsequently carrying out normal operation to generate 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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IPC IPC(8): C02F1/44B01D63/08B01D65/02
CPCB01D63/08B01D65/02C02F1/44B01D2321/04B01D2321/16C02F2001/007
Inventor 胡以松王晓昌杨媛
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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