Aluminum oxidation wastewater treatment and reclaimed water reuse technology

Abstract

The invention relates to aluminum oxidation wastewater treatment and reclaimed water reuse technology, which is characterized in that the technology mainly comprises the steps of pretreatment, electric coagulation, micro-filtration and reverse osmosis; pretreating high fluoride-containing wastewater, ammonia-containing wastewater and nickel-containing wastewater respectively, and centralizedly draining the wastewater to a wastewater disposal basin with other production wastewater in a workshop; sending the wastewater into 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, making the wastewater after the electric coagulation treatment enter an electric coagulation discharge bay, sending the wastewater to a micro-filtration concentration tank, conveying the wastewater to a micro-filtration system, and collecting a micro-filtration effluent to a reuse water basin; and conveying one part of water in the reuse water basin to the workshop for reuse, quantificationally draining one part, conveying the other part to a reverse osmosis system to produce pure water, and storing the pure water in a pure water storage tank. In sum, 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, cannot cause secondary pollution of reuse water due to adding a coagulating agent and a flocculating agent, and has high reuse rate of reclaimed water.

Description

(1) Technical field [0001] The invention relates to a method for treating aluminum oxidation wastewater and reclaiming water, and is particularly suitable for treating and reusing 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 oxidation wastewater include traditional nickel removal, fluori...

AI Technical Summary

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

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