Non-ferrous metal mine flotation wastewater treatment method

Abstract

The invention discloses a non-ferrous metal mine flotation wastewater treatment method which comprises the following steps: adjusting the pH value of flotation wastewater to be weak acidity; under the conditions of stirring and ultraviolet lamp radiation, feeding a Fenton's reagent and a catalyst to perform ultraviolet-Fenton oxidation reaction; feeding an alkali liquid into the wastewater after the oxidation reaction in the stirring state to adjust the pH value, and subsequently adding a coagulation agent for coagulation and static settlement; feeding a potassium permanganate oxidant for secondary oxidation into the supernate after settling. According to the characteristics that the non-ferrous metal mine flotation wastewater contains heavy metals, a great variety of flotation reagents are used and the content is relatively high, coagulating sedimentation and a high-class oxidation technique are combined for synergic treatment, and secondary oxidation is adopted to further treat small molecule COD substances after high-class oxidation. The method is simple in process, good in wastewater treatment effect, high in treatment efficiency, stable in system operation, relatively low in wastewater treatment cost and wide in application prospect, and particularly has advantages that other methods do not have for non-ferrous metal flotation wastewater which is hard to treat.

Description

technical field [0001] The invention relates to the fields of environmental protection technology and water treatment technology, in particular to a method for treating nonferrous metal mine flotation wastewater. Background technique [0002] Non-ferrous metal mines will produce a large amount of flotation wastewater during the flotation process. The wastewater has complex water quality and various components, including various heavy metals and mixed organic flotation agents. If it is discharged outside, it will cause serious harm to the surrounding ecological environment. If Returning to the process for recycling, the harmful substances in the wastewater will continue to accumulate, which will have an adverse impact on the production process and equipment. Therefore, it is necessary to choose an appropriate treatment method to treat the flotation wastewater. At present, the commonly used treatment methods include chemical precipitation method, adsorption method, microbial m...

AI Technical Summary

Problems solved by technology

[0002] Non-ferrous metal mines will produce a large amount of flotation wastewater during the flotation process. The wastewater has complex water quality and various components, including various heavy metals and mixed organic flotation agents. If it is discharged outside, it will cause serious harm to the surrounding ecological environment. If Returning to the process for recycling, the harmful substances in the wastewater will continue to accumulate, which will have an adverse impact on the production process and equipment. Therefore, it is necessary to choose an appropriate treatment method to treat the flotation wastewater

At present, the commonly used treatment methods include chemical precipitation method, adsorption method, microbial method, artificial wetland method, etc. Although these treatment methods have certain advantages, they are generally limited by factors such as mine production conditions, environmental conditions or treatment requirements. For example, the chemical precipitation method is relatively effective in treating heavy metals, but the treatment effect of organic substances is poor; the adsorption method can effectively treat heavy metal wastewater, but when the adsorbent is regenerated, the pollutants will be regenerated; the cost of microbial treatment is relatively low, but Reaction conditions are relatively harsh, and it is difficult to be popularized and applied; the wetland method occupies a large area, and the treatment cycle is long, and it is difficult to meet the treatment requirements