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Device and method for processing chemical wastewater with salinity higher than 10%

A chemical wastewater and salinity technology, applied in chemical instruments and methods, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., to achieve enhanced treatment effect, mild reaction, and guaranteed electrolysis efficiency

Active Publication Date: 2014-12-10
ZHEJIANG GONGSHANG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition to this, there is no other treatment method that can effectively treat ultra-high salt (>10%) wastewater

Method used

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  • Device and method for processing chemical wastewater with salinity higher than 10%
  • Device and method for processing chemical wastewater with salinity higher than 10%
  • Device and method for processing chemical wastewater with salinity higher than 10%

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] The treated water sample is high-salt, high-nitrogen, and high-organic medical wastewater, using the device and process flow of the present invention, wherein the current density in the first module is controlled to be 200A / m 2 , pH value is 7, hydrogen peroxide drop acceleration rate is 0.5ml·(h·L) -1 / g COD; the current density in the second module is 250A / m 2 , pH value is 5, hydrogen peroxide drop acceleration rate is 0.3ml·(h·L) -1 / g COD; the current density in the third module is 400A / m 2 . The raw water sample pollutants and the wastewater pollutants treated by this device are shown in Table 1.

[0060] Table 1 Salinity, ammonia nitrogen, COD indicators in water samples

[0061]

[0062]

Embodiment 2

[0064] The treated water sample is high-salt, high-nitrogen, and high-organic medical wastewater, using the device and process flow of the present invention, wherein the current density in the first module is controlled to be 250A / m 2 , pH value is 7, hydrogen peroxide drop acceleration rate is 1.0ml·(h·L) -1 / g COD; the current density in the second module is 300A / m 2 , pH value is 6, hydrogen peroxide drop acceleration rate is 0.2ml·(h·L) -1 / g COD; the current density in the third module is 500A / m 2 . The raw water sample pollutants and the waste water pollutants treated by this device are shown in Table 2.

[0065] Table 2 Salinity, ammonia nitrogen, COD indicators in water samples

[0066]

Embodiment 3

[0068] The treated water sample is high-salt, high-nitrogen, and high-organic medical wastewater, using the device and process flow of the present invention, wherein the current density in the first module is controlled to be 300A / m 2 , pH value is 6.5, hydrogen peroxide drop acceleration rate is 0.8ml·(h·L) -1 / g COD; the current density in the second module is 200A / m 2 , pH value is 5, hydrogen peroxide drop acceleration rate is 0.1ml·(h·L) -1 / g COD; the current density in the third module is 300A / m 2 . The raw water sample pollutants and the wastewater pollutants treated by this device are shown in Table 3.

[0069] Table 3 Salinity, ammonia nitrogen, COD indicators in water samples

[0070]

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Abstract

The invention discloses a device and a method used for processing chemical wastewater with salinity higher than 10%. The device comprises a reaction tank body and a control system. The reaction tank body comprises a sealed electrolysis tank with a water inlet and a water outlet. The sealed electrolysis tank is divided into a first module, a second module, and a third module through separation walls between the water inlet and the water outlet, wherein the modules are sequentially communicated. A plurality sets of electrode plates are respectively arranged in the first module, the second module, and the third module. The control system comprises a central control unit. The control system also comprises a first hydrogen peroxide adding device, a first pH value controller, a second hydrogen peroxide adding device, a second pH value controller, and a stabilized direct-current power supply, which are connected with the central control unit. The device and the method provided by the invention are used for processing chemical wastewater with salinity higher than 10%. The quality of final outlet water is better than that specified by a first-level standard of an Integrated Wastewater Discharge Standard (GB8978-1996).

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a standard-reaching treatment device and method for ultra-high-salt (>10%) chemical high-concentration wastewater. Background technique [0002] The chemical industry is the basic industry and pillar industry of the national economy, which plays an important role in promoting economic and social development. With the rapid development of this industry, about billions of tons of wastewater are generated every year. After years of hard work, most of the pharmaceutical and chemical wastewater can be effectively treated. It is worth noting that most pharmaceutical and chemical companies will discharge a stream of "three high" wastewater with a salinity of more than 10%, ammonia nitrogen>4000mg / L, and COD>8000mg / L. Although this wastewater only accounts for 1% of the wastewater in the pharmaceutical and chemical industry, its hazards are far greater than other wast...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/06
Inventor 梁禹翔冯华军蒋小丹谢春言张晓龙金晓林王珏华沈东升殷俊汪美贞龙於洋申屠佳丽
Owner ZHEJIANG GONGSHANG UNIVERSITY
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