Method for sterilizing and disinfecting sewage by injecting plasma free radicals and device

Abstract

The invention relates to the field of water treatment, in particular to a method for sterilizing and disinfecting sewage by injecting plasma free radicals. Oxygen-containing gas reacts in a plasma generator so as to produce the plasma free radicals, the plasma free radicals are conveyed to bubbling devices in a disinfection container by a conveying device, sewage is fed by the bubbling devices, and then the sewage in the disinfection container is disinfected and sterilized. The invention also relates to a device for treating the sewage by the method. According to the device and the method, the oxygen-containing gas is subjected to dissociation and collision ionization in the plasma generator so as to form the active substances of the plasma free radicals, and the gas containing the active ingredients is injected into the sewage to be treated by the bubbling devices, so that germs and viruses in water are killed by oxidation, and the disinfection and sterilization aim is fulfilled; and due to the adoption of the plasma generator, compared with the conventional ultraviolet disinfection, the method has the advantages that energy consumption is greatly reduced, and after the active substances of the plasma free radicals participate in sewage disinfection, second pollutants are not produced, so that environment can be protected.

Description

technical field [0001] The invention relates to the field of water treatment, in particular to a method and a device for injecting plasma free radicals into sewage for sterilization and disinfection. Background technique [0002] The current situation of water pollution in my country is quite serious. In recent years, the daily discharge of industrial wastewater and domestic sewage is nearly 164 million tons, of which 80% are directly discharged into rivers and waters without strict treatment; the reaches of nearly 100,000 kilometers of 1700 major rivers nationwide Among them, nearly 1 / 2 of the river sections were polluted, and 1 / 10 of the river sections were seriously polluted; more than 90% of the urban waters were polluted. On the other hand, my country is one of the countries with serious shortage of water resources in the world. It needs 6% of the world's water to feed 20% of the world's people. The per capita drinking water in my country is only 1 / 4 of the world's avera...

AI Technical Summary

Problems solved by technology

In the above-mentioned commonly used sewage disinfection technologies, toxic disinfection by-products may be produced, and there are "three causes" substances, which will have long-term toxic effects on humans and aquatic organisms; or the on-site preparation equipment is complex, large investment, high cost, and equipment management Complexity, etc.; ultraviolet technology has problems such as regeneration of photocomposite bacteria, fouling film of quartz sleeve, price of high-power and long-life quartz tube, high maintenance cost, ultraviolet light transmittance, and high power consumption of equipment.

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