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Method for deeply treating nonbiodegradable sewage

A treatment method and advanced treatment technology, applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problem of unsatisfactory treatment efficiency, high operating cost, and large dosage of ozone And other issues

Active Publication Date: 2013-03-13
BEIJING ORIGINWATER TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] There are still some technical defects in the existing patent application technology, such as large dosage of ozone, high operating cost, unsatisfactory treatment efficiency, and cannot fully meet the growing market demand. Improvements have been made, and the present invention has been completed

Method used

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  • Method for deeply treating nonbiodegradable sewage
  • Method for deeply treating nonbiodegradable sewage

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Embodiment 1: Advanced treatment of biologically refractory sewage by the present invention

[0050] The implementation steps are as follows:

[0051] A. Coagulation and flocculation

[0052] Let COD cr The biodegradable sewage with a concentration of 60mg / L enters the coagulation area of ​​the coagulation flocculation tank, and at the same time, the coagulant polyaluminum chloride is continuously added at a ratio of 85mg coagulant per liter of biodegradable sewage, and the stirring intensity G is 1000 Under the conditions of the above conditions, let the sewage and the coagulant mix for 30s, then let the mixture enter the flocculation area of ​​the coagulation flocculation tank, and mix for 16min under the condition that the stirring intensity G is 40, and the SS containing 86mg / L is obtained. the water of the alum flower;

[0053] B. Membrane filtration

[0054] Let the effluent obtained in step A enter the membrane filtration unit from the lower part of the membr...

Embodiment 2

[0057] Embodiment 2: Advanced treatment of biologically refractory sewage by the present invention

[0058] The implementation steps are as follows:

[0059] A. Coagulation and flocculation

[0060] Let COD cr The biodegradable sewage with a concentration of 130mg / L enters the coagulation area of ​​the coagulation and flocculation tank, and at the same time, the coagulant polyaluminum chloride is continuously added according to the ratio of 100mg coagulant per liter of biodegradable sewage, and the stirring intensity G is 600 Under the condition of , let the sewage and the coagulant mix for 60s, then let the mixture enter the flocculation area of ​​the coagulation flocculation tank, mix for 20min under the condition that the stirring intensity G is 30, and obtain the SS containing 50mg / L the water of the alum flower;

[0061] B. Membrane filtration

[0062] Let the effluent obtained in step A enter the membrane filtration unit from the lower part of the membrane filtration...

Embodiment 3

[0065] Embodiment 3: Advanced treatment of biologically refractory sewage by the present invention

[0066] The implementation steps are as follows:

[0067] A. Coagulation and flocculation

[0068] Let COD cr The biodegradable sewage with a concentration of 100mg / L enters the coagulation area of ​​the coagulation flocculation tank, and at the same time, the coagulant polyaluminum chloride is continuously added at a ratio of 50mg coagulant per liter of biodegradable sewage, and the stirring intensity G is 850 Under the condition of , let the sewage and the coagulant mix for 50s, then let the mixture enter the flocculation area of ​​the coagulation flocculation tank, mix it for 15min under the condition that the stirring intensity G is 60, and obtain the SS containing 100mg / L the water of the alum flower;

[0069] B. Membrane filtration

[0070] Let the effluent obtained in step A enter the membrane filtration unit from the lower part of the membrane filtration unit. The rati...

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Abstract

The invention relates to a method for deeply treating nonbiodegradable sewage which combines a membrane filtration technology and a catalytic ozonation technology. The method comprises the steps of coagulating, flocculating, membrane filtration and ozonation. Compared with the prior art, the method for deeply treating nonbiodegradable sewage is capable of improving the efficiency of removing pollutants, guaranteeing the effluent quality to reach the standard, fully saving medicament adding amount and reducing operation cost, has excellent economical efficiency, and is suitable for the situation of China and worthy of popularization.

Description

【Technical field】 [0001] The invention belongs to the technical field of sewage treatment. More specifically, the present invention relates to a method for advanced treatment of biologically refractory sewage that combines membrane filtration technology and ozone catalytic oxidation technology. 【Background technique】 [0002] With the rapid advancement of industrialization and urbanization in our country, especially in some economic development zones, industrial wastewater occupies a large proportion of the total sewage in the area. From a technical point of view, due to the complex types of industrial wastewater, industrial wastewater treatment is more difficult and challenging than urban sewage treatment. If proper treatment is not carried out, it will increase the pressure on water environmental pollution and threaten ecological security and residents' health. In view of this, the "Twelfth Five-Year Plan" clearly stipulates that environmental protection should be strengt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04
Inventor 俞开昌薛涛李桂平方莎黄霞文剑平戴日成
Owner BEIJING ORIGINWATER TECH CO LTD
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