Depth treatment method and system of wastewater in industrial park

Abstract

The invention discloses a depth treatment method and system of wastewater in an industrial park, belonging to the field of sewage treatment. The method comprises the following steps of: carrying out ozone-ultraviolet catalytic oxidation treatment on the treated wastewater in the industrial park after precipitation, and oxidizing cyclic organic matters, partial toxic substances and non-degradable substances contained in the discharged water by ozone and ultraviolet ray; adding sodium hydrogen sulfite into the discharged water subjected to ozone-ultraviolet catalytic oxidation treatment, and reducing active oxygen in the oxidized wastewater by the sodium hydrogen sulfite; enabling the reduced discharged water to enter a biological aerated filter for being subjected to aeration and biological filtering treatment, and removing organic matters and ammonia nitrogen; and filtering the discharged water of the biological aerated filter, and after filtering, using the discharged water without the suspended matters as standard water for reuse. The method disclosed by the invention has the characteristics of high impact load resistance, strong treatment capability, short process flow, small occupied area of the system, and good treatment effect.

Description

technical field [0001] The invention relates to the field of wastewater treatment, in particular to a treatment method and system suitable for advanced treatment of sewage in industrial parks. Background technique [0002] With the acceleration of urbanization, the functional areas of urban construction are relatively obvious, and there are relatively concentrated industrial and mining enterprises in each urban industrial park, such as printing and dyeing, leather, chemical fiber, textile and other enterprises. The sewage discharged by these enterprises is highly polluting and difficult to treat. features. With the improvement of the environmental protection supervision system, most factories and mines in industrial parks have sewage treatment facilities, but they often deal with these refractory wastewater, which is difficult to meet industry standards or comprehensive discharge labels. Some industrial enterprises even secretly discharge into nearby rivers, causing river po...

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Problems solved by technology

[0012] The embodiment of the present invention provides a method and system for advanced treatment of wastewater in industrial parks, which can solve the problems that the current methods for treating wastewater in industrial parks have poor treatment effects and the effluent cannot meet the corresponding standards

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