Industrial wastewater treatment method based on high-frequency intensified flocculation

A technology for industrial wastewater and treatment methods, which is applied in the fields of chemical industry and environmental protection, can solve problems such as membrane damage and biochemical system hazards, and achieve the effects of prolonging service life, reducing operating costs, and reducing the amount of PAM

Inactive Publication Date: 2019-03-22
江门市崖门新财富环保工业有限公司
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  • Claims
  • Application Information

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Problems solved by technology

At the same time, when the water quality fluctuates greatly, the effluent of the sedimentation tank contains a large amount of alum flowers, which brings great harm to th...

Method used

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  • Industrial wastewater treatment method based on high-frequency intensified flocculation

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Effect test

Embodiment 1

[0028] An industrial wastewater treatment method based on high-frequency enhanced flocculation. If it is chemical wastewater with high COD, the specific steps are:

[0029] ①: According to the pH of industrial wastewater, add acidic or alkaline substances to adjust the pH of wastewater to 2~3.5;

[0030] ②: To predict the content of waste water COD and other substances that need Fenton oxidation, add a certain concentration of ferrous sulfate and hydrogen peroxide in a certain proportion;

[0031] ③: The waste water after Fenton reaction is blown into air to blow off a small amount of gas in the waste water;

[0032] ④: Add alkaline substances such as lime or sodium hydroxide to adjust the pH of wastewater to form hydroxide precipitation;

[0033] ⑤: Add an appropriate amount of PAC water solution, and stir quickly to mix the medicament thoroughly;

[0034] ⑥: Pass the waste water in step ⑤ through the high-frequency equipment at a certain flow rate, and its frequency range is between 30...

Embodiment 2

[0039] An industrial wastewater treatment method based on high-frequency enhanced flocculation. If it is wastewater containing heavy metals, the specific steps are:

[0040] ①: Add alkaline substances such as lime or sodium hydroxide to wastewater containing heavy metals to adjust the pH of the wastewater to form hydroxide precipitation;

[0041] ②: Add an appropriate amount of PAC water solution, and stir quickly to make the agent fully mixed;

[0042] ③: Pass the wastewater in step ② through the high-frequency equipment at a certain flow rate, and its frequency range is between 300KHz and 300GHz. The wastewater resonates under the action of high-frequency electromagnetic field, which promotes the destabilization and diffusion of particles in the water, and not only reduces PAC and 30%~60% of the PAM dosage, it also forms high-density, high-strength flocs, shortens the residence time by 20%-40%, lowers the turbidity of the supernatant in the sedimentation tank, and reduces the possi...

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Abstract

The invention provides industrial wastewater treatment method based on high-frequency intensified flocculation, and belongs to the technical field of sewage treatment. The treatment method mainly introduces a high-frequency intensified flocculation technique, and through high-frequency equipment, the problems that in the conventional chemical precipitation method for heavy metal ions in industrialwastewater, and floc and iron colloid in water drained from a Fenton oxidizing tower, lots of chemicals are added, and they are difficult to treat are solved. A small amount of PAC and PAM are added,then high-density and high-strength floc can be formed rapidly, the occupied area of a settling pond is reduced, load to follow-up wastewater advanced treatment and a recycling process is relieved, the running cost is reduced, and economic value is created for enterprises.

Description

Technical field [0001] The invention relates to the fields of environmental protection and chemical technology, and specifically refers to an industrial wastewater treatment method based on high-frequency enhanced flocculation. Background technique [0002] The removal of heavy metal ions in industrial wastewater mainly adopts conventional chemical precipitation methods. It first adjusts the pH to make the water-soluble heavy metals form hydroxide precipitation, then add PAC and PAM, combined with the inclined plate sedimentation tank to achieve mud-water separation. [0003] The effluent of the industrial Fenton oxidation tower contains a large amount of flocs and colloids, and a large amount of PAM needs to be added to destabilize the flocs and colloids, combined with the inclined plate sedimentation tank to achieve mud-water separation. [0004] In this process, a large amount of coagulant aids PAC and PAM are added, otherwise the requirements of floc size, floc density and resid...

Claims

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Application Information

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IPC IPC(8): C02F9/12
CPCC02F1/20C02F1/48C02F1/5236C02F1/56C02F1/66C02F1/722C02F1/725C02F9/00C02F2001/007
Inventor 郑从欢陈健壮卢福伟陈铭
Owner 江门市崖门新财富环保工业有限公司
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