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Method for processing waste water containing cyanide, thiocyanogen and heavy metal

A technology for wastewater treatment and heavy metals, applied in neutralized water/sewage treatment, oxidized water/sewage treatment, water/sewage multi-stage treatment, etc. Cyanate treatment effect is poor and other problems, to achieve the effect of high effective utilization of ozone, good treatment effect, and stable treatment effect

Active Publication Date: 2013-08-21
CHANGCHUN GOLD RES INST
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  • Description
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Problems solved by technology

The natural degradation method and the Inco method have poor treatment effects on thiocyanate, and the treated wastewater cannot meet the COD national discharge standard. At the same time, the removal effect on arsenic and heavy metals is poor
Although the ozone method can recover the useful substances and has a good treatment effect on the above pollutants, its infrastructure cost and operating cost are high, and the utilization rate of ozone is low. Difficult for industrial application

Method used

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  • Method for processing waste water containing cyanide, thiocyanogen and heavy metal
  • Method for processing waste water containing cyanide, thiocyanogen and heavy metal
  • Method for processing waste water containing cyanide, thiocyanogen and heavy metal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1: Small batch test

[0026] The wastewater from a tailings pond of a gold mine was taken as the wastewater to be treated, and its main pollutants were sampled and analyzed twice. The composition of the main pollutants is as follows:

[0027] Composition of wastewater samples from tailings reservoir of a gold mine

[0028]

[0029] The waste water was treated by ozone method, the Inco method, and the combined treatment effect and cost of the ozone Inco method. The results are as follows:

[0030] (1) Ozone method alone treatment test

[0031] Take 3L of water sample, ventilation volume 0.20m 3 / h, ozone concentration 8.0g / m 3 , the dosage of ozone is 1.6g / h, and the reaction pH value is 8-9. The test results are as follows:

[0032] Ozone alone treatment test results

[0033]

[0034] (2) The individual treatment test of the Inko method

[0035] Take 3L of water sample, ventilation volume 0.20m 3 / h, add 2.0g sodium metabisulfite at the beginning o...

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Abstract

The invention discloses a method for processing waste water containing cyanide, thiocyanogen and heavy metal. The method is characterized by reasonably combining an INCO method and an ozone method, so that the defects of the two methods can be avoided, and the advantages of the two methods can be maintained. The cyanide-containing waste water in a tailings pond of the gold industry can be treated in four steps of reaction medicine preparation, INCO treatment, ozone oxidation treatment and solid-liquid separation, the treatment effect on the cyanide, COD (chemical oxygen demand), As and heavy metals is good, the treatment cost is low, the impact resistance and load capacity are strong, and the secondary pollution can be avoided. Therefore, by adopting the method to treat the cyanide-containing waste water in the tailings pond, a good environmental benefit and a social benefit can be realized.

Description

technical field [0001] The invention belongs to the technical field of mine environmental protection and comprehensive treatment, and is mainly aimed at cyanide-containing wastewater containing pollutants such as cyanide, rhodanide, heavy metals and arsenic. The process method organically combines the Inko method and the ozone method, avoids the shortcomings of the two methods, and inherits the advantages of the two methods. The cyanide-containing waste water of the gold industrial tailings pond treated by the method has good treatment effects on cyanide, COD, As and heavy metals, low treatment cost, strong impact load resistance and no secondary pollution. Background technique [0002] The cyanide wastewater and tailings slurry produced by the gold industry and other industries contain a variety of harmful pollutants, among which cyanide, rhodanide (a type of COD), heavy metals, and arsenic are the main common pollutants. In addition, the dry tailings of gold mines after p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04
CPCC02F9/00C02F1/52C02F1/66C02F1/78C02F2101/103C02F2101/18C02F2101/20
Inventor 李哲浩降向正
Owner CHANGCHUN GOLD RES INST
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