Wastewater advanced treatment system and treatment method

Abstract

The invention relates to the technical field of advanced wastewater treatment processes, and provides advanced wastewater treatment system and method. The treatment system comprises an ozone preparation system, an oxidation system and a tail gas recovery system, wherein the ozone preparation system comprises air separation oxygen production equipment and an ozone generator; the oxidation system comprises an ozone oxidation reactor and an ozone destructor; the tail gas recovery system is used for purifying tail gas mixed gas and providing oxygen to the ozone generator together with the air separation oxygen production equipment. The treatment method comprises the following steps: treating air into oxygen-enriched gas through the air separation oxygen generation equipment, and feeding the oxygen-enriched gas into the ozone generator to generate ozone mixed gas; enabling the ozone mixed gas to enter an ozone oxidation reactor to degrade sewage, and enabling the oxidized ozone mixed gas toenter an ozone destructor to generate tail gas mixed gas; and sending the tail gas mixed gas to the tail gas recovery system to be purified to obtain oxygen-enriched gas, wherein the oxygen-enrichedgas and oxygen generated by the air separation oxygen generation equipment are supplemented to the ozone generator.

Description

technical field [0001] The present disclosure relates to the technical field of wastewater advanced treatment technology, in particular to a wastewater advanced treatment system and treatment method. Background technique [0002] At present, the traditional methods of sewage and wastewater treatment mainly include biological treatment, physicochemical method and advanced oxidation technology. Although the biological treatment method has low operating cost and good treatment effect, it is difficult to obtain satisfactory treatment effect on substances with poor biodegradability. The physicochemical method removes pollutants through oxidation, adsorption, membrane filtration and other methods, but the treatment cost is high, and by-products or new pollutants will be produced. Advanced oxidation technology is often used in the advanced treatment or biological pretreatment of sewage and wastewater, especially in the treatment of difficult biodegradable sewage and wastewater. ...

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Problems solved by technology

However, in the prior art, the ozone oxidation method usually needs to prepare ozone through a liquid oxygen tank and provide an oxygen source through a vaporizer. The cost of raw gas is relatively high, and the recovery concentration of oxygen in the recovery system is low, and the stability of the system is poor. Add additional equipment to introduce oxygen into the system, wasting equipment costs

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