A system for combined electrolysis-ultraviolet treatment of aquaculture circulating water

Abstract

The invention discloses a system for treating cultivation recycled-water through electrolysis-ultraviolet combination. The system comprises a cultivation pond, a vortex separator, an electrolysis groove, a buffering groove and an activated carbon processor; part of outlet water of the cultivation pond generated after solid-liquid separation of the vortex separator enters the electrolysis groove to be subjected to electrolysis-ultraviolet combined treatment, the other part outlet water directly enters the buffering groove, water in the buffering groove passes through a circulating water pump and then enters the activated carbon processor, and finally outlet water of the activated carbon processor flows back to the cultivation pond. According to the system, designed electrolysis-ultraviolet combined water treatment equipment can raise the removal rate of ammonia nitrogen and COD, the concentration of residual chlorine in water is lowered, sterilization is conducted thoroughly, influence of the water turbidity is avoided, and new water treatment technology is expected to be provided for recirculating aquaculture.

Description

technical field [0001] The invention relates to a treatment system for aquaculture circulating water, in particular to a system and method for electrolysis-ultraviolet combined treatment of aquaculture circulating water. Background technique [0002] In recent years, the aquaculture industry has developed rapidly driven by economic development. The scale of the aquaculture industry has continued to expand, and the output has increased year by year. It has achieved huge economic benefits and made outstanding contributions to improving people's living standards. However, the wastewater produced in the process of aquaculture also seriously threatens the living environment of the surrounding people, and at the same time frequently causes environmental pollution accidents. At present, the commonly used sterilization methods in circulating water are mainly ozone and ultraviolet light. Although ultraviolet sterilization has the advantages of simple installation, convenient managem...

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Problems solved by technology

Although ultraviolet sterilization has the advantages of simple installation, convenient management, fast disinfection speed and no water pollution, it also has two disadvantages: one is that the radiation intensity of ultraviolet lamps continues to decrease with the prolongation of use time, and ultraviolet sterilization is easily affected by water bodies. The second is that its disinfection and sterilization ability is related to the radiation time and intensity. When the water flow rate through the system is too fast or the irradiation dose does not meet the requirements, after the treated water leaves the reactor, some microorganisms killed by ultraviolet rays will Photoreactivation mechanism repairs damaged DNA molecules and regenerates bacteria

Studies have shown that if water samples containing a certain concentration of residual chlorine are directly discharged into the water body, the residual chlorine, whether it is chemical or free, will cause great toxic effects on fish and aquatic organisms

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