Treatment method of sulfide in basic residue sewage

Abstract

The invention relates to the field of sewage treatment, and discloses a treatment method of sulfide in basic residue sewage. The method comprises the steps that in the presence of a catalyst and an oxidant, catalytic oxidation is conducted on sulfide in the basic residue sewage, and the catalyst contains a titanium-silicon molecular sieve. According to the treatment method of sulfide in the basic residue sewage, the titanium-silicon molecular sieve serves as the catalyst, the reaction condition is mild, and high temperature and high pressure are not needed; the operation process is simple and easy to control, and the repeatability is good; no special production equipment requirement is needed, and industrialization is promoted; the oxidant is high in utilization rate, good in treatment effect and capable of greatly improving biodegradability of the basic residue sewage; the catalyst is stable and is not volatilized and degraded and is environmentally friendly; the catalyst is high in catalytic activity, long in service life and capable of being regenerated and recycled. The method is low in treatment cost and can be widely applied to treatment of the basic residue sewage.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to a method for treating sulfide in alkali residue sewage. Background technique [0002] A large amount of alkali residue sewage is produced in petrochemical processes such as petroleum refining and ethylene production, and its main pollutants have high sulfide content and high COD concentration. Sulfide not only seriously pollutes the surrounding environment, but also produces hydrogen sulfide when the pH value of the water drops, which is easy to overflow from the water and endanger human health. In addition, the alkali slag sulfide will also corrode metal equipment and seriously affect the subsequent process. [0003] At present, the high temperature wet oxidation process is mostly used in the industry to treat the alkali slag sulfide. Although the effect is good, the energy consumption is high and the efficiency is low. It often requires high temperature, high pressure or some e...

AI Technical Summary

Problems solved by technology

Patent CN102086055A discloses a method for removing sulfide in wastewater. The purpose of removing sulfide is achieved by setting a wastewater treatment container. This technology has many equipments, complicated operation and long processing time.