A kind of alkaline wastewater treatment method containing edta and copper cobalt nickel

Abstract

The invention discloses a method for treating alkaline wastewater containing EDTA and copper-cobalt-nickel, which includes the following steps: (1) adjusting the pH value of the alkaline wastewater containing EDTA and copper-cobalt-nickel to 9-10, and filtering (2) According to the liquid-solid ratio of 50-200:1, add CaO powder with a diameter of 20-500μm to the wastewater adjusted in step (1), control the reaction temperature at 50-80°C, and stir it to make it Fully react for 1‑5h; (3) After the reaction, filter again through a filter press, and use activated carbon adsorption process to absorb free EDTA or EDTA chelate; (4) Return the pH value of the filtrate to 6‑9 and then discharge it. Collect the filter residue centrally. The method has the advantages of simple process, remarkable effect, low cost and convenient popularization and application.

Description

A kind of alkaline wastewater treatment method containing EDTA and copper cobalt nickel technical field The present invention relates to a kind of waste water treatment method, be specifically related to a kind of alkaline waste water treatment method containing EDTA and copper-cobalt-nickel Law. Background technique Nonferrous metal ion content such as Cu, Co, Ni in the discharge waste water of copper-cobalt-nickel metallurgy production enterprises needs to meet GB 25467 2010 "Copper, Nickel and Cobalt Industrial Pollutant Emission Standards" stipulates that Cu, Ni<0.5mg / L, Co<1mg / L, COD<100. follow With the continuous expansion of the production chain of enterprises, more and more copper-cobalt-nickel metallurgical production enterprises have begun to use the metals they produce for refining. Production of downstream products of fine chemical industry to improve the added value of enterprise products. However, it is accompanied by the difficult treatment...

AI Technical Summary

Problems solved by technology

However, this type of method has the disadvantages of incomplete and selective degradation of organic matter, low degradation efficiency, and slow reaction speed.

In addition, this type of method generally has a better treatment effect in an acidic environment, and this type of industrial wastewater is generally in an alkaline environment. If this type of wastewater is adjusted to acidic treatment, it will inevitably increase the cost.