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Treatment process and device of industrial wastewater containing heavy metal ions

A technology for heavy metal ions and industrial wastewater, which is applied in the field of water treatment, can solve the problems of unstable discharge water quality, high concentration of heavy metal ions in effluent, and difficulty in achieving efficient and deep removal of wastewater containing heavy metal ions, so as to ensure water quality and stability and occupy an area The effect of small area and easy operation

Inactive Publication Date: 2014-09-10
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved in the present invention is that in the process of chemical precipitation to treat industrial wastewater containing heavy metal ions, the pH control is strict, the discharge water quality is unstable, and the concentration of heavy metal ions in the effluent is higher than the discharge standard. It is difficult to realize the high efficiency of heavy metal ion wastewater. To solve the problem of removal, the present invention provides a process and device for treating wastewater containing heavy metal ions with a reasonable structure, thereby reducing the concentration of heavy metal ions in the effluent to a large extent

Method used

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  • Treatment process and device of industrial wastewater containing heavy metal ions
  • Treatment process and device of industrial wastewater containing heavy metal ions
  • Treatment process and device of industrial wastewater containing heavy metal ions

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Effect test

Embodiment 1

[0029] lab test

[0030] The device used: a lead-containing wastewater treatment device includes: raw water tank 1, valve 2, flow meter 3 is not provided in this embodiment, water pump 4, alkali tank 5, agitator 6, pH probe 7, reaction sedimentation tank 8, Filtration tower 9, filter material 10, pressure gauge 11 is not provided in this embodiment, tap water tank 12, intermediate pool 13, acid tank 14, adsorption tower 15, polymer hydrogel adsorption material 16, clean water tank 17, filter press 18 is not set in this embodiment.

[0031] Influent lead ion concentration 10mg / l, pH is 2.0, and filter material 10 in this embodiment is followed by quartz sand, anthracite, cobblestone from top to bottom, and the aspect ratio of adsorption tower 15 is 5, according to figure 2 As shown in the process flow chart, the water samples of the clear water tank 17 are taken every 3 hours. After 24 hours of continuous treatment, the concentration of lead ions in the effluent is lower than...

Embodiment 2

[0033] lab test

[0034] The device used: a lead-containing wastewater treatment device includes: raw water tank 1, valve 2, flow meter 3 is not provided in this embodiment, water pump 4, alkali tank 5, agitator 6, pH probe 7, reaction sedimentation tank 8, Filtration tower 9, filter material 10, pressure gauge 11 is not provided in this embodiment, tap water tank 12, intermediate pool 13, acid tank 14, adsorption tower 15, polymer hydrogel adsorption material 16, clean water tank 17, filter press 18 is not set in this embodiment.

[0035] Influent lead ion concentration 100mg / l, pH is 2.0, and COD concentration is 70mg / l, filter material 10 is activated carbon, zeolite, cobblestone successively from top to bottom in this embodiment, and the aspect ratio of adsorption tower 15 is 6. According to figure 2 As shown in the process flow chart, water samples from the clear water tank 17 are taken every 2 hours. After 24 hours of continuous treatment, the concentration of lead io...

Embodiment 3

[0037] Pilot test of lead-containing wastewater plant

[0038] The device used: a lead-containing wastewater treatment device includes: raw water tank 1, valve 2, flow meter 3, water pump 4, alkali tank 5, agitator 6, pH probe 7, reaction sedimentation tank 8, filter tower 9, filter material 10. Pressure gauge 11, tap water barrel 12, intermediate pool 13, acid barrel 14, adsorption tower 15, hydrogel adsorption material 16, clear water pool 17, filter press 18.

[0039] In a certain electroplating factory, the concentration of lead ion in the influent is 5 mg / l, the pH is 2.5, the concentration of COD is 80 mg / l, and the concentration of SS is 90 mg / l. The filter material 10 in this embodiment is activated carbon and anthracite from top to bottom. , zeolite, the aspect ratio of adsorption tower 15 is 6, according to figure 2 As shown in the process flow chart, water samples from the clear water tank 17 are taken every 1 day. After continuous treatment for 7 days, the concen...

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Abstract

The invention belongs to the technical field of water treatment, and in particular relates to a treatment process and device of industrial wastewater containing heavy metal ions. The treatment process and device comprise two parts namely an enhanced pre-treatment process and device and an adsorption treatment process and device, wherein the enhanced pre-treatment device comprises a raw water bucket, a reaction sedimentation tank and a filter tower which are connected with one another in sequence; the adsorption treatment device comprises a middle water tank, an adsorption tower and a clean water tank which are connected with one another in sequence. A filter material in the filter tower consists of quartz sand, anthracite, cobblestone, activated carbon, or zeolite; and a filling material in the adsorption tower is a hydrogel adsorption material. The treatment process and device disclosed by the invention have the advantages that a polymer hydrogel adsorbent and a fixed bed technology are adopted for effectively reducing the concentration of the heavy metal ions in a water body; and the adsorbed hydrogel is desorbed by using acid liquor to recycle the adsorption materials and reduce the wastewater treatment cost. The device disclosed by the invention is simple in structure and occupies a small space; the equipment is compact and simple and easy to operate so as to ensure high water quality and stability of effluent.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to a process and device for treating industrial wastewater containing heavy metal ions. technical background [0002] In recent years, the utilization rate of heavy metals in the industrial sector has shown exponential growth, especially with the vigorous development of the mining industry, battery industry, fossil energy industry, electroplating industry, and electronics industry, the threat of heavy metal pollution to the human living environment has become increasingly significant. Heavy metals entering the environment will inhibit the metabolism of organisms at all levels in the environment and cause harm to human physiological functions and intelligence. At the same time, due to the persistence, toxicity and biochemical non-degradability of heavy metal pollutants, once they enter the environment, they will long-term or permanent existence. Lead ions are tox...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F101/20
Inventor 李正魁王晶晶华蓉张万广朱倩刘丹丹叶忠香韩华杨
Owner NANJING UNIV
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