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Enhanced disposal method applicable to wastewater of water-based cutting fluids

A technology of enhanced treatment and cutting fluid, applied in the direction of water/sewage treatment, oxidized water/sewage treatment, multi-stage water/sewage treatment, etc., can solve the problems of high operating costs, advanced oxidation technology and many insects, and achieve economical operation Cost, significant treatment effect, and the effect of increasing the probability of collision

Inactive Publication Date: 2019-08-09
SHANGHAI NAT ENG RES CENT FORNANOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are many insects in the advanced oxidation technology, and the operating cost is relatively high, so there are certain limitations in practical application.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] An enhanced treatment method suitable for water-based cutting fluid wastewater, using the combined process of physical oil separation-emulsification coagulation-ozone catalysis-flocculation sedimentation to achieve the effect of efficiently removing CODcr and ammonia nitrogen, according to the following steps:

[0020] (1) First, the water-based cutting fluid wastewater is centrifuged to remove slick oil;

[0021] (2) Demulsification coagulation:

[0022] At 65°C, add dimethyl diallyl ammonium chloride monomer with a solid content of 60% into the three-necked flask, add deionized water and stir thoroughly, adjust the pH to 5.5, and then inject nitrogen for 30 minutes according to the mass ratio Add ammonium persulfate and disodium ethylenediaminetetraacetic acid dihydrate as initiator and chelating agent at a ratio of 1:1, and react for 12 hours; slowly pour the obtained liquid into acetone, stir well, pour out the supernatant, and then add Wash with absolute ethanol u...

Embodiment 2

[0026] An enhanced treatment method suitable for water-based cutting fluid wastewater, using the combined process of physical oil separation-emulsification coagulation-ozone catalysis-flocculation sedimentation to achieve the effect of efficiently removing CODcr and ammonia nitrogen, according to the following steps:

[0027] (1) First, the water-based cutting fluid wastewater is centrifuged to remove slick oil;

[0028] (2) Demulsification coagulation:

[0029] At 70°C, add dimethyl diallyl ammonium chloride monomer with a solid content of 60% into the three-necked flask, add deionized water and stir thoroughly, adjust the pH to 4.5, and then inject nitrogen for 30 minutes according to the mass ratio Add ammonium persulfate and disodium ethylenediaminetetraacetic acid dihydrate as initiator and chelating agent at a ratio of 1:1, and react for 12 hours; slowly pour the obtained liquid into acetone, stir well, pour out the supernatant, and then add The demulsification coagulan...

Embodiment 3

[0034] An enhanced treatment method suitable for water-based cutting fluid wastewater, using the combined process of physical oil separation-emulsification coagulation-ozone catalysis-flocculation sedimentation to achieve the effect of efficiently removing CODcr and ammonia nitrogen, according to the following steps:

[0035] (1) First, the water-based cutting fluid wastewater is centrifuged to remove slick oil;

[0036] (2) Demulsification coagulation:

[0037] At 75°C, add dimethyl diallyl ammonium chloride monomer with a solid content of 60% into the three-necked flask, add deionized water and stir thoroughly, adjust the pH to 5, and then inject nitrogen gas for 30 minutes according to the mass ratio Add ammonium persulfate and disodium ethylenediaminetetraacetic acid dihydrate as initiator and chelating agent at a ratio of 1:1, and react for 12 hours; slowly pour the obtained liquid into acetone, stir well, pour out the supernatant, and then add The demulsification coagul...

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PUM

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Abstract

The invention relates to an enhanced disposal method applicable to wastewater of water-based cutting fluids. The method can effectively achieve removal of organic pollutants and ammonia nitrogen in the wastewater. According to the method, a combined process of physical oil separation, demulsification coagulation, ozone catalysis and flocculation sedimentation is adopted, a cationic demulsificationcoagulant is utilized to fully neutralize the surface charges of emulsified oil droplets, destroy hydration membranes of the emulsified oil droplets, compress an electric double layer, increase the collision probability among the oil droplets and thus accelerate the destabilization and demulsification of emulsified oil, and more free radicals of active hydroxyl are generated in combination with the decomposition rate of ozone under the action of a heterogeneous ternary composite ozone catalyst. In this way, catalyzation of organic pollutants in ozonized water is facilitated, the mineralization rate of organic matter is greatly increased, and the biodegradability of the wastewater is improved significantly.

Description

technical field [0001] The invention relates to an enhanced treatment method suitable for water-based cutting fluid wastewater, which can effectively improve the biodegradability of wastewater, promote the removal of high-concentration refractory organic matter in wastewater, and is used in the field of enhanced treatment of water pollution. Background technique [0002] Cutting fluid wastewater belongs to high-concentration industrial wastewater, which is difficult to treat and degrade, and contains a large amount of pollutants. Water-based cutting fluid is mainly used for cooling, and generally can be divided into emulsion fluid, semi-synthetic cutting fluid and synthetic cutting fluid. Due to its complex composition and good chemical stability, it is difficult to deal with it directly. It is usually difficult to remove it by one method. Several methods are combined, such as: physical separation, chemical removal, biological degradation, advanced oxidation mineralization, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F101/30
CPCC02F1/38C02F1/40C02F1/5236C02F1/5245C02F1/56C02F1/725C02F1/78C02F9/00C02F2001/007C02F2101/30
Inventor 何丹农童琴赵昆峰王泽轩代卫国金彩虹
Owner SHANGHAI NAT ENG RES CENT FORNANOTECH
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