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Treatment method of chromium-containing wastewater

A treatment method and technology for chromium wastewater, applied in water/sludge/sewage treatment, ion-exchanged water/sewage treatment, chemical instruments and methods, etc. Discharge, inability to achieve the treatment effect and other problems, to achieve a significant adsorption effect, the treatment method is simple and easy to operate, and the effect of improving the adsorption effect

Active Publication Date: 2018-08-24
HEFEI CONVER HLDG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the prior art, the chromium-containing sewage treatment methods mainly include chemical reduction precipitation method, SO2 reduction method, iron filings and iron powder treatment method, etc., but the treatment process of the above-mentioned method is complicated, and can not achieve a good treatment effect, and cannot achieve chromium ion recovery. Zero discharge, not suitable for the treatment of chromium-containing sewage in wastewater plants

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A method for treating chromium-containing wastewater, the method includes filtering the chromium-containing wastewater through a composite resin filter element; wherein, the composite resin includes polyether resin and modified DT resin.

Embodiment 2

[0019] A method for treating chromium-containing wastewater, the method comprising filtering the chromium-containing wastewater through a composite resin filter element; wherein the composite resin includes polyether resin and modified DT resin;

[0020] Wherein, the preparation process of the modified DT resin is as follows: DT resin and modified xanthan gum are mixed and stirred for 20 minutes, lignin and calcium carbonate are added, the temperature is raised to 60° C., and hydrochloric acid with a mass fraction of 45 wt % is added to Drop the funnel into the system, reflux and condense for 4 hours to obtain the modified DT resin;

[0021] The weight ratio of the DT resin, modified xanthan gum, lignin and calcium carbonate is 1:0.8:0.1:0.1.

Embodiment 3

[0023] A method for treating chromium-containing wastewater, the method comprising filtering the chromium-containing wastewater through a composite resin filter element; wherein the composite resin includes polyether resin and modified DT resin;

[0024] Wherein, the preparation process of the modified DT resin is as follows: DT resin and modified xanthan gum are mixed and stirred for 30 minutes, lignin and calcium carbonate are added, the temperature is raised to 50° C., and hydrochloric acid with a mass fraction of 65 wt % is dripped Drop the funnel into the system, reflux and condense for 3 hours to obtain the modified DT resin;

[0025] The weight ratio of the DT resin, modified xanthan gum, lignin and calcium carbonate is 2:0.5:0.5:0.06;

[0026] The preparation process of the modified xanthan gum is as follows: add vanillin to the xanthan gum, heat up to 80°C, react for 3 hours, filter the product after cooling, wash the filter cake with water until neutral, dry at 60°C ...

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Abstract

The invention discloses a treatment method of chromium-containing wastewater. According to the method disclosed by the invention, the chromium-containing wastewater is subjected to filtering treatmentthrough a composite resin filter element, wherein composite resin is prepared from polyether resin and modified DT resin. The treatment method has a remarkable adsorption effect on trivalent chromiumions and hexavalent chromium ions; the treatment method is simple and easy to operate and can realize zero emission of the chromium ions in a wastewater plant.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a treatment method for chromium-containing wastewater. Background technique [0002] As an indispensable element in the basic industry, cement is used in various fields, and the hexavalent chromium contained in cement will spread accordingly, such as tap water treatment pools, houses we live in and other places. As the hexavalent chromium gradually leaches out, the water quality will be polluted. In our drinking water, chromium mostly appears in the form of hexavalent chromium and trivalent chromium, among which hexavalent chromium is more toxic, which is about 100 times that of trivalent chromium, and hexavalent chromium is mainly in the form of chromium exists in the form of acid salts. Therefore, the effective treatment of chromium-containing sewage is particularly important. [0003] In the prior art, the chromium-containing sewage treatment methods mainly include...

Claims

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Application Information

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IPC IPC(8): C02F1/42C02F101/22
CPCC02F1/42C02F2101/22
Inventor 江洋
Owner HEFEI CONVER HLDG