Dynamic membrane automatic water flow-out solid-liquid separation method applicable to domestic sewage treatment

A technology of solid-liquid separation and dynamic membrane, which is applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problem of high power consumption, achieve low investment cost, and improve filtration Water permeability, light pollution effect

Active Publication Date: 2012-08-01
TONGJI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the shortage of high power consumption of membrane bioreactor in urban sewage treatment, and develop a dynamic membrane self-flowing water solid-liquid separation method suitable for domestic sewage treatment. Water-permeable powder particles (such as powder sintered diatomite, powdered activated carbon, etc.) form a bio-enhanced powder mixture to improve the structure of activated sludge; combined with dynamic membrane separation technology, the filtration and permeability of dynamic membrane mud cake are greatly improved Capability; it can realize the solid-liquid separation and water discharge of the dynamic membrane module (flat or tubular type) driven by the fixed gravity effect water head formed by the liquid level difference between the upper liquid level of the submerged dynamic membrane module in the reaction device and the water outlet, No need for external power, easy operation and low energy consumption

Method used

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  • Dynamic membrane automatic water flow-out solid-liquid separation method applicable to domestic sewage treatment
  • Dynamic membrane automatic water flow-out solid-liquid separation method applicable to domestic sewage treatment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] In this embodiment, the dynamic membrane reaction device for urban sewage treatment adds powdered sintered diatomaceous earth to improve the characteristics of the mixed solution and as a microbial carrier. The concentration of MLSS in the mixed solution is 10000 mg / L, and the gravity self-flow is carried out under the liquid level pressure difference of 4 KPa. water. The specific implementation method is as follows:

[0033] 1. Use 200-mesh stainless steel mesh as the support structure of the dynamic membrane module 4. The support structure is tubular, and the tubular dynamic membrane module 4 is fixed and immersed in the dynamic membrane bioreactor 1.

[0034] 2. When the dynamic membrane is pre-coated, the time relay 7 starts to control the water inlet pump 2 not to enter the water, the support body starts to discharge water under the action of the vacuum pump, and the pre-coated water flows back into the dynamic membrane bioreactor 1. After that, the time relay ...

Embodiment 2

[0038] In this embodiment, the dynamic membrane reaction device for urban sewage treatment adds powdered sintered diatomaceous earth to improve the characteristics of the mixed solution and serve as a microbial carrier. The concentration of MLSS in the mixed solution is 10000 mg / L, and the gravity self-flow is carried out under the liquid level pressure difference of 2 KPa. water. The specific implementation method is as follows:

[0039] 1. Use 200-mesh stainless steel mesh as the support structure of the dynamic membrane module 4. The support structure adopts a tubular type, and the tubular dynamic membrane module is fixed and immersed in the reaction device.

[0040] 2. When the dynamic membrane is pre-coated, the time relay 7 starts to control the water inlet pump 2 not to enter the water, the support body starts to discharge water under the action of the vacuum pump, and the pre-coated water flows back into the dynamic membrane bioreactor 1. After that, the time relay...

Embodiment 3

[0044] In this embodiment, the dynamic membrane reaction device for urban sewage treatment is added with powdered activated carbon to improve the characteristics of the mixed liquid and serve as a microbial carrier. The concentration of MLSS in the mixed liquid is 12000 mg / L, and the gravity self-flowing water is carried out under the liquid level pressure difference of 4 KPa. The specific implementation method is as follows:

[0045] 1. Use 200-mesh stainless steel mesh as the dynamic membrane module 4, and the support body structure is tubular, and the tubular dynamic membrane module is fixed and immersed in the reaction device.

[0046] 2. During the pre-coating of the dynamic film, the time relay 7 starts to control the water inlet pump not to enter the water, and the support body starts to discharge water under the action of the vacuum pump, and the pre-coated water is returned to the reactor device by the vacuum pump. After that, the time relay controls the water infl...

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Abstract

The invention provides a dynamic membrane automatic water flow-out solid-liquid separation method applicable to domestic sewage treatment. The method includes: adding powder particles with fine water permeable performance into activated sludge to form biological intensified powder mixed liquid to structurally improve the activated sludge; combining with the dynamic membrane separation technique to greatly improve the filtering capacity and water permeability of dynamic membrane filter cakes; performing solid-liquid separation of discharged water by allowing a dynamic membrane component to be driven by a water head having lower fixed gravity action and formed by liquid level waterhead between the upper liquid level of the immersed dynamic membrane component in a reaction device and a wateroutlet, stably controlling the unit area membrane filter flux of the dynamic membrane component to be more than 20-60L / m2h and the continuous operating time to be longer than 120h without action of external power; and allowing the dynamic membrane to completely shed with the air backwashing time being 1min-2min and the air inlet pressure being 9.8-49kPa. The dynamic membrane component does not need to be chemically cleaned regularly, and control and operation of the method can be automatically controlled in the whole process. The dynamic membrane solid-liquid separation technique can realize automatic water flowing out under differential pressure of low-liquid-level waterhead, energy consumption is greatly reduced, operation process is simplified, and discharged water is high in quality.

Description

technical field [0001] This invention relates to a method for solid-liquid separation of dynamic membrane self-flowing water suitable for domestic sewage treatment, which can realize dynamic membrane self-flowing water under the drive of gravity, without the need for power equipment, and saves energy consumption. It belongs to the new type of membrane solid-liquid in the field of domestic sewage treatment. Separation technology. Background technique [0002] The new membrane bioreactor formed by the combination of membrane separation and bioreactor is considered to be the most promising sewage treatment and bioreactor in the 21st century because of its reliable effluent quality, convenient operation, compact structure, and small footprint. One of the recycling technologies. Submerged membrane bioreactor combined membrane technology and bioreactor technology is a new bright spot in efficient sewage treatment system. However, there are not many examples of the application of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14
Inventor 张亚雷褚华强周雪飞张海苑辉
Owner TONGJI UNIV
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