Fenton reaction system and method for treating organic pollutants in waste water by Fenton reaction system

Abstract

The invention relates to a Fenton reaction system and a method for treating organic pollutants in waste water by the Fenton reaction system. The Fenton reaction system comprises an ejector, a coil pipe, and a reaction tank orderly connected through pipelines; waste water and a Fenton reagent are pumped into the ejector through a pipeline, is mixed with the Fenton reagent, flow into the coil pipe for a mixing reaction, and then flow into the reaction tank with a pressure adjusted by a needle valve for a Fenton reaction. The method for treating organic pollutants in waste water comprises: (1) adjusting the pH value of the waste water, pumping the waste water into the pipeline, mixing the waste water with an oxidant solution and a catalyst solution of the Fenton reagent respectively in the ejector, allowing the mixtures to flow into the spiral coil pipe for a mixing reaction; (2) allowing the product of the mixing reaction to flow into the reaction tank with a pressure adjusted by a needle valve for a Fenton reaction; (3) adjusting the pH value of the effluent of the reaction tank with alkaline liquor, performing precipitation, discharging sludge into a sludge workshop for treatment, and discharging the supernatant into a biochemical pool.

Description

technical field [0001] The invention relates to a Fenton reaction system and a method for using the Fenton reaction system to treat organic pollutants in wastewater. Background technique [0002] In 1894, H.Fenton found that hydrogen peroxide and ferrous ions can effectively oxidize and decompose tartaric acid in an acidic aqueous solution. This reagent is called Fenton's reagent, and the reaction using this reagent is called the Fenton reaction. In the process of Fenton reaction, OH with strong oxidizing property can be generated, and its redox potential is as high as 2.8V, which can react with most organic pollutants, completely destroy the structure of organic matter without selectivity, and finally generate CO2, H2O and inorganic salts. It has the advantages of fast reaction speed and no secondary pollution, and is widely used in the treatment of organic pollutants with high concentrations that are difficult to biodegrade. [0003] The traditional Fenton reaction has p...

AI Technical Summary

Problems solved by technology

The reason why batch addition can improve the removal efficiency of Fenton oxidation is that after one-time dosage, ferrous iron will undergo self-consumption reaction through free radical competition and local free concentration is too high, thereby reducing the removal efficiency of organic matter

Its disadvantage is that it increases the complexity of the operation

Its disadvantage is that aeration and heating increase energy consumption

Images