Method for treating aquaculture seawater tail water based on free radicals generated by photoelectrocatalysis

Abstract

The invention discloses a method for treating aquaculture seawater tail water based on free radicals generated by photoelectrocatalysis. The method comprises the steps of firstly, preparing an electrode for generating active chlorine by photoelectrocatalysis and an air cathode; and secondly, taking the prepared electrode for generating active chlorine through photoelectrocatalysis as a photo-anode, covering the surface of the prepared air cathode with a layer of copper net, additionally applying 1.1-5.0 V voltage, and achieving seawater treatment. Under the assistance of natural illumination, a certain bias voltage is applied, the photo-anode is subjected to a photoelectrocatalytic reaction to generate Cl2, then HClO is generated, and the HClO can play a role in killing algae and bacteria; the cathode is subjected to an oxygen reduction reaction to generate H2O2, the H2O2 forms OH. under the catalytic action of copper, and the OH. can directly oxidize and remove antibiotics and organic matters; and meanwhile, HClO reacts with OH. to generate a chlorine-oxygen free radical ClO., ammonia nitrogen and antibiotics in the water body are removed through oxidation, and then simultaneous removal of multiple pollutants is achieved.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a method for treating aquaculture seawater tail water based on free radicals generated by photoelectric catalysis. Background technique [0002] With the improvement of marine aquaculture technology and the expansion of market demand, the scale of seawater factory aquaculture in my country has expanded rapidly in recent years, which has led to marine ecological environment problems that have gradually attracted widespread attention. In the process of mariculture production, in order to promote the growth of aquatic products, it is often necessary to add a large amount of bait and growth hormone. Therefore, the tail water of aquaculture seawater often contains a large amount of organic matter and ammonia nitrogen. In fact, in recent years, the total amount of mariculture wastewater discharged into the sea has exceeded the discharge of land-based wastewater, which has caus...

AI Technical Summary

Problems solved by technology

[0003] Mariculture wastewater has the characteristics of high salinity, complex components, and large water volume. Traditional water treatment processes are mainly developed for low-salinity wastewater. The treatment effect on high-salinity wastewater is not ideal, and the treatment cost is too high

The existing technology generally uses chemical treatment, which has problems such as unsatisfactory treatment effect and easy to produce secondary pollution.

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