Method for waste water treatment by Fenton reaction

Abstract

The invention relates to the improvement on Fenton waste water treatment method, which is characterized in that: firstly, an aluminum salt and / or iron salt flocculating agent and a Fenton reagent are fully mixed in a mass ratio of 2.5-4.5:1; and secondary, the mixed medicinal agent is added into waste water to be treated at a concentration of 800 to 3,000ppm to fully react. The method has the advantages that: the characteristic that the Fenton reaction reagent has an excellent oxidizing effect on soluble organic substances and the characteristic that the aluminum salt or / and iron salt flocculating agent has a good flocculating and separation effect on insoluble organic colloids and suspended particles are used; the utilization rate of H2O2 is high; 10 to 30 percent of the dosage of the flocculating agent can be saved; 50 to 80 percent of the dosage of the Fenton oxidizer is saved; the waste water treatment efficiency is improved; the dosage of the flocculating agent is reduced withoutlowering the treatment effect, so the produced sludge is reduced, a high synergy of the aluminum salt and / or iron salt flocculating agent and the Fenton reagent is achieved and advantages that cannotbe achieved by the signal use of the aluminum salt and / or iron salt flocculating agent or the Fenton reagent are achieved; and a new approach for treating waste water by oxidization with Fenton is provided.

Description

technical field [0001] The invention is an improvement to a sewage Fenton (Fenton) treatment method, in particular to a Fenton reaction treatment sewage treatment method with less dosage of chemicals and wide adaptability to acidity. Background technique [0002] The Fenton reaction has a very strong oxidizing ability and can oxidize many kinds of organic matter, so it is used for the treatment of refractory organic wastewater. Usually Fenton reaction, is to directly Fenton reaction reagent (ferrous salt and strong oxidizing agent such as H 2 o 2 or HClO) into the treated water, Fenton oxidation is the ferrous ion reacting with the oxidizing agent in the water to produce strongly oxidized hydroxyl radicals, which oxidize and carbonize the refractory organic matter in the wastewater into degradable small molecules to achieve the degradation effect. Fenton's reagent is directly added, and the ferrous salt that plays a catalytic role in the Fenton's reagent is dissolved in wa...

AI Technical Summary

Problems solved by technology

This method not only does not overcome the aforementioned disadvantages of large amount of Fenton reaction reagents and high processing costs, but also results in higher processing costs due to the addition of a titanium metal catalyst.

[0012] The above-mentioned various improvements to the Fenton reaction do not involve reducing the amount of Fenton reagent and shortening the Fenton reaction time. There is still room for improvement.