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Mercury-polluted water treatment process

A water treatment and mercury pollution technology, applied in the direction of adsorption water/sewage treatment, oxidized water/sewage treatment, water/sewage multi-stage treatment, etc., can solve industrial sewage pollution, there is no mature engineering practice precedent, and the mercury content index is very low Difficult to meet emission standards and other issues, to achieve the effect of simple process and complete removal

Inactive Publication Date: 2011-04-27
周光毅
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  • Application Information

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Problems solved by technology

[0002] Due to the development of rubber and other industries, the use of mercury as a production catalyst has seriously polluted industrial sewage. The concentration of mercury in the surface water is as low as 879ng / l, and the highest value can reach 22563ng / L. After ordinary sewage treatment, its mercury content index is also difficult. Can meet emission standards (<0.5μg / L)
Especially for the treatment of mercury-polluted water containing both organic mercury and inorganic mercury, as well as high concentrations of organic matter and suspended matter, there is no mature engineering practice precedent in China

Method used

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Embodiment 1

[0027] Mercury polluted water treatment process mainly includes pretreatment and mercury removal.

[0028] Pretreatment: The existing polluted water is mixed, and the mixed polluted water is sent into the suction tank 1 by the lifting pump for sewage treatment. First, after data analysis and field water sample measurement, the maximum concentration of total mercury in the mixed solution is 12522 ng / L, based on this concentration to determine the segmental control index of this set of sewage treatment process.

[0029] For the mixed polluted water, according to the content of suspended solids and organic matter in the water, different pretreatment processes are adopted to prevent the treatment device from being blocked by suspended solids during operation.

[0030] 1) When the concentration of suspended solids in the water body is less than or equal to 100mg / L, the water body is directly sent to the oxidation tank 3 water treatment system for mercury removal treatment after bei...

Embodiment 2

[0052] Mercury polluted water treatment process mainly includes pretreatment and mercury removal.

[0053] Pretreatment: with embodiment 1.

[0054] Mercury removal: It has been tested that both organic mercury and inorganic mercury are contained in the water body. The organic mercury must be removed first, and then the inorganic mercury should be removed.

[0055] Removal of organic mercury: The main method used to remove organic mercury in polluted water is to oxidize organic mercury forcibly, convert organic mercury into inorganic mercury, and then treat it according to the treatment method of inorganic mercury.

[0056] Since the water body in the on-site sedimentation tank is in a non-flowing state, the amount of suspended solids in the upper part of the pool is very low. When the concentration of suspended solids is ≤100mg / L, the water body is directly sent to the oxidation tank after being lifted, and the organic mercury, The organic matter is oxidized, and the oxidant...

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Abstract

The invention relates to the field of sewage treatment, in particular to a treatment method of mercury-polluted water. The mercury-polluted water treatment process mainly comprises pretreatment and mercury removal, wherein the pretreatment is as follows: pretreatment is carried out on the collected polluted water, the suspended matter concentration in the water body is less than or equal to 100mg / L; mercury removal is as follows: (1) inorganic mercury is removed; (2) mercury and mercuric salt are removed by adsorption; secondary adsorption is carried out by an obligate zeolite and hydroxide radical activated carbon, wherein the hydroxide radical activated carbon further adsorbs inorganic mercuric salts in the polluted water; (3) mercury and mercuric salts are removed by ion exchange, and final treatment is carried out on mercury in the polluted water, so as to enable mercury ions in the treated polluted water to reach mercury discharge limit value 0.5mug / l. In the invention, the process is simple, organic mercury and inorganic mercury in the polluted water can be thoroughly removed effectively, so as to enable the mercury-containing concentration to reach emission standards.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to a treatment method for mercury-containing sewage. Background technique [0002] Due to the development of rubber and other industries, the use of mercury as a production catalyst has seriously polluted industrial sewage. The concentration of mercury in the surface water is as low as 879ng / l, and the highest value can reach 22563ng / L. After ordinary sewage treatment, its mercury content index is also difficult. Can meet emission standards (<0.5μg / L). Especially for the treatment of mercury-polluted water containing both organic mercury and inorganic mercury, as well as high concentrations of organic matter and suspended matter, there is no mature engineering practice precedent in China. Contents of the invention [0003] The purpose of the present invention is to overcome the above disadvantages and provide a mercury-contaminated water treatment process, which can thoroughly ...

Claims

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Application Information

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IPC IPC(8): C02F9/04C02F1/42C02F1/28C02F1/76C02F101/20
Inventor 周光毅刘桂新宫立宝宫宝凯李汉文
Owner 周光毅
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