Industrial wastewater decoloring treatment process

A technology for treating process and industrial wastewater, which is applied in the fields of water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc. , the problem of high cost of adsorbent regeneration, to achieve the effect of eliminating resin desorption and regeneration, improving oxidative decolorization efficiency and improving reaction conditions

Active Publication Date: 2011-12-14
杭州浙大易泰环境科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] Industrial wastewater such as pharmaceutical wastewater, printing and dyeing wastewater, and chemical wastewater is generally difficult to achieve chromaticity with a single method
The coagulation method has a poor removal effect on water-soluble chromogenic organic compounds; the adsorption method has problems such as high regeneration costs of the adsorbent; the chemical oxidation method has strong selectivity, and the selection of a suitable catalyst is the most critical; The decolorization efficiency is not high

Method used

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  • Industrial wastewater decoloring treatment process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Adjust the pH of pharmaceutical wastewater, and input it into the adsorption oxidation reactor filled with NKA-9 polar macroporous adsorption resin (manufacturer: Nankai University Chemical Factory), a large amount of color-forming organic matter is adsorbed in the resin, when the chromaticity removal rate is less than 60% When draining water, add H to the adsorbent resin 2 o 2 , carry out oxidative decolorization, and activate the regenerated resin at the same time; the effluent of the adsorption oxidation reactor adjusts the pH and then enters the catalytic oxidation reactor, which is filled with the adsorption resin loaded with copper oxide, and added H 2 o 2 , carry out catalytic oxidation decolorization, and remove small molecules and non-polar chromogenic organic substances that are difficult to adsorb in the adsorption oxidation unit.

[0036] Wastewater influent water quality: chromaticity is 5000 times;

[0037] Adsorption oxidation reactor hydrogen peroxide...

Embodiment 2

[0047] Adjust the pH of printing and dyeing wastewater, and input it into the adsorption oxidation reactor filled with NKA-II polar macroporous adsorption resin (manufacturer: Nankai University Chemical Factory), a large amount of color-forming organic matter is adsorbed in the resin, when the chromaticity removal rate is less than 60% When draining water, add ClO to the adsorption resin 2 Solution, carry out oxidative decolorization, and activate the regeneration resin at the same time; The effluent of the adsorption oxidation reactor enters the catalytic oxidation reactor, and the adsorption resin loaded with nickel oxide is filled in the reactor, and ClO is added 2 Solution, decolorization by catalytic oxidation, removal of small molecules and non-polar chromogenic organic substances that are difficult to adsorb by the adsorption oxidation unit.

[0048] Wastewater influent water quality: chromaticity is 1000 times;

[0049] Adsorption Oxidation Reactor ClO 2 Dosage: 0.2kg / ...

Embodiment 3

[0059] Adjust the pH of coking wastewater, and input it into the adsorption oxidation reactor filled with HPD400 polar macroporous adsorption resin (manufacturer: Cangzhou Baoen Chemical Co., Ltd.), a large amount of chromogenic organic matter is adsorbed in the resin, when the chromaticity removal rate is less than 60 % when draining water, add H to the adsorption resin 2 o 2 , carry out oxidative decolorization, and activate the regenerated resin at the same time; the effluent of the adsorption oxidation reactor adjusts the pH and then enters the catalytic oxidation reactor. 2 o 2 , carry out catalytic oxidation decolorization, and remove small molecules and non-polar chromogenic organic substances that are difficult to adsorb in the adsorption oxidation unit.

[0060] Wastewater influent water quality: chromaticity is 3000 times;

[0061] Adsorption Oxidation Reactor H 2 o 2 Dosage: 0.3kg / m 3 waste water;

[0062] Catalytic Oxidation Reactor H 2 o 2 Dosage: 0.2kg / m...

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Abstract

The invention discloses an industrial wastewater decoloring treatment process. The process comprises the following steps: the pH value of wastewater is adjusted, an adsorption and oxidation reactor filled with adsorption resin is introduced, a lot of chormophoric organics are adsorbed in the resin, when the chroma removal rate is less than 60%, drainage is performed, a liquid-phase oxidant is added in the adsorption resin to perform oxidative decoloration, the resin is activated and regenerated; and after the pH value of the discharged water of the adsorption and oxidation reactor is adjusted, the discharged water enters a catalytic oxidation reactor, the adsorption resin loaded with a transition metal catalyst is filled in the reactor, and the liquid-phase oxidant is added to perform heterogeneous catalytic oxidation decoloration and remove the small molecules and nonpolar chormophoric organics which are difficult to be adsorbed by the adsorption and oxidation unit. By adopting the method, the polar and nonpolar chormophoric organics with wide molecular weight range can be removed and the effects of efficient decoloring and wide applications can be achieved.

Description

technical field [0001] The invention relates to water pollution control and waste water treatment technology, in particular to an industrial waste water decolorization treatment process. Background technique [0002] Industrial wastewater such as pharmaceutical wastewater, printing and dyeing wastewater, and chemical wastewater is recognized as difficult to treat, and the chromaticity of wastewater often becomes the bottleneck indicator for the standard treatment of these wastewater and the reuse of reclaimed water. These wastewaters contain a variety of chromogenic organic compounds, unsaturated chromophoric groups such as ethylenic bonds, carboxyl groups, amido groups, sulfonamide groups, carbonyl groups and benzene rings are common in chromogenic organic compounds, and -NH 2 , -NHR, -NR 2 , -OR, -OH and -SH and other auxochromic groups, their interaction makes the color of wastewater very high. [0003] From the perspective of currently applied wastewater treatment tech...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04
Inventor 沈卓贤官宝红邹有良
Owner 杭州浙大易泰环境科技有限公司
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