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Sulfide deposition processing method for overproof metallic pollutant in water

A technology of sulfide precipitation and treatment method, which is applied in the field of water treatment, can solve the problems of exceeding the standard and unable to deal with metal pollutants in water source water, etc., and achieve the effect of low operating cost and simple operation

Inactive Publication Date: 2008-09-24
TSINGHUA UNIV +1
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Problems solved by technology

[0009] The purpose of the present invention is to provide a sulfide precipitation treatment method to deal with excessive metal pollutants in water, so as to realize the economical, safe and high-efficiency guarantee of normal water supply in the urban water supply industry in case of sudden metal pollution in water source water, so as to solve the current drinking water treatment process Unable to deal with excessive metal pollutants in water source water

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  • Sulfide deposition processing method for overproof metallic pollutant in water
  • Sulfide deposition processing method for overproof metallic pollutant in water
  • Sulfide deposition processing method for overproof metallic pollutant in water

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Embodiment Construction

[0031] At present, my country's water plants usually use conventional water purification processes:

[0032] Source water→water intake pump room→mixing well→flocculation reaction tank→sedimentation tank→filter tank→clean water tank→water supply pump room→pipe network

[0033] The process adjustment route required to adopt this method is:

[0034] 1. Prepare anhydrous sodium sulfide or potassium sulfide into about 5% solution in advance, and calibrate the solution.

[0035] 2. Test the concentration of excessive metal pollutants in raw water, and calculate the required concentration for adding sulfide according to the molar concentration ratio of the dose of sulfide proposed in the present invention and the metal ion.

[0036] 3. According to the amount of raw water and the concentration of sulfide to be added, adjust the flow rate of the dosing metering pump, and accurately add the sulfide solution to the mixing well or the water intake pipeline. Chlorine, potassium permangan...

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Abstract

The invention relates to a sulfide precipitation treatment method of overproof metal contaminant in water, which belongs to the water treatment field. The sulfide precipitation treatment method is characterized in that soluble sulfide is added into water to cause the metal contaminant to generate undissolved sulfide, coagulant is put in again to lead the metal sulfide undissolved substance and aluminum floc to be precipitated; when left sulfide in precipitated output water is over the water quality standard of the drinking water, chlorine or chlorine dioxide is put in for oxidizing and removing the sulfide. The sulfide precipitation treatment method of overproof metal contaminant in water of the invention can treat several-fold to several tenfolds of signal metal contaminant or several metal contaminant occurred simultaneously, the equipment and the operation are simple, the operation cost is not high, the water yield of water works is not influenced, and the application of the water works is convenient, the city water supply can be realized high efficiently, safely, and economically when the metal contaminant in a water source is over the standard, and the method can also be applied to the industrial water treatment.

Description

technical field [0001] The invention relates to a method for treating excessive metal pollutants in water, in particular to a chemical precipitation treatment method developed to deal with sudden metal pollution of drinking water sources, and belongs to the field of water treatment. Background technique [0002] Since the drinking water source water quality standard requires that the pollutants in it shall not exceed a certain limit, drinking water treatment usually does not require the treatment of metal pollutants. However, when drinking water sources are polluted by sewage containing a large amount of metal pollutants, urban water supply companies have to face the problem of dealing with excessive metal pollutants. [0003] At present, the treatment methods commonly used in the drinking water industry include the following two types: [0004] 1. Increase the dosage of coagulant [0005] Due to the physical and chemical characteristics of metal ions, this method has a li...

Claims

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Application Information

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IPC IPC(8): C02F9/04C02F1/58C02F1/52C02F1/72
Inventor 张晓健张悦陈超王欢王建平申石泉林朝晖董玉莲陈诚李振林
Owner TSINGHUA UNIV
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