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Treatment and reuse technology for aluminum surface treatment wastewater

A technology for treating wastewater and aluminum surface, which is applied in water/sewage treatment, adsorbed water/sewage treatment, neutralized water/sewage treatment, etc. Achieving the effect of high reclaimed water reuse rate

Active Publication Date: 2009-10-28
江阴新苏铝科技有限公司
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Problems solved by technology

[0005] Conventional chemical precipitation and filtration methods are difficult to meet the new requirements of sewage treatment, especially in terms of heavy metals, COD and reclaimed water reuse rate
Moreover, the conventional chemical precipitation method requires the input of coagulants and flocculants, which will cause secondary pollution of reused water

Method used

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  • Treatment and reuse technology for aluminum surface treatment wastewater

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Embodiment Construction

[0023] see figure 1 , a treatment and reuse technology of aluminum surface treatment wastewater involved in the present invention, the high fluorine-containing wastewater, ammonia-containing wastewater and nickel-containing wastewater are pretreated respectively, and then the fluorine-containing wastewater treatment system effluent, ammonia-containing wastewater treatment system The effluent, the effluent of the nickel-containing wastewater treatment system and other production wastewater in the workshop are collectively discharged to the wastewater tank, and then transported to the pH adjustment tank, where the pH is adjusted to 4-6, and the treatment time is 20-30 minutes; then transported to Electrocoagulation machine, for electrocoagulation treatment, the electrocoagulation treatment time is 6-10 minutes, the wastewater after electrocoagulation treatment enters the electrocoagulation outlet pool, and the pH in the electrocoagulation outlet pool is adjusted to 7-8, and the r...

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Abstract

The invention relates to treatment and reuse technology for aluminum surface treatment wastewater, which is characterized in that the technology mainly comprises working procedures of pretreatment, electric coagulation treatment, chemical precipitation and adsorption, filtration and reverse osmosis; pretreating high fluoride-containing wastewater, ammonia-containing wastewater and nickel-containing wastewater respectively, centralizedly draining the wastewater to a wastewater disposal basin, conveying the wastewater to a pH adjustment tank, conveying the wastewater to an electric coagulation machine for electric coagulation treatment after the pH value is adjusted to be between 4 and 6 in the pH adjustment tank, and making the wastewater after the electric coagulation treatment enter an electric coagulation discharge bay; and conveying the wastewater in the electric coagulation discharge bay to a coagulating basin, conveying the wastewater to a flocculation basin, adding a flocculating agent into the flocculation basin to ensure that the wastewater performs a coagulation-flocculation reaction, and finally adding activated carbon from the position, which is close to a water outlet, of the flocculation basin to adsorb small granular substances and colors in the wastewater. The technology can effectively remove heavy metals and salts in the wastewater, ensure that the COD in the treated wastewater is less than or equal to 25 mg / L, and has high reuse rate of reclaimed water.

Description

(1) Technical field [0001] The invention relates to a treatment and reuse technology of aluminum surface treatment wastewater, which is especially suitable for the treatment and reuse of wastewater in aluminum profile processing enterprises. (2) Background technology [0002] Profile processing enterprises consume a lot of water for the surface treatment of aluminum profiles, generate a lot of waste water, and continue to discharge harmful substances in the waste water. If they are not treated, they will pollute the environment and aggravate the increasingly tense domestic shortage of fresh water resources. At the same time, with my country's taxation on pollutant discharge, it will also increase the cost and burden of enterprises. Therefore, from the two aspects of corporate social responsibility and economic benefits, wastewater treatment is necessary and necessary. [0003] The treatment methods of aluminum profile surface treatment wastewater include traditional nickel ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/06C02F1/463C02F1/28C02F1/44C02F1/66C02F1/52
Inventor 苏存章
Owner 江阴新苏铝科技有限公司
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