Method for treating organic pollutants in oilfield wastewater based on activated carbon and activated persulfate

CN122036051BActive Publication Date: 2026-07-21KARAMAY YURONG CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
KARAMAY YURONG CO LTD
Filing Date
2026-04-14
Publication Date
2026-07-21

AI Technical Summary

Technical Problem

Existing methods for treating organic pollutants in oilfield wastewater have poor removal efficiency. Physical adsorption methods fail to completely remove organic pollutants, while chemical oxidation methods suffer from numerous side reactions and easy catalyst deactivation.

Method used

A method combining coal tar pitch-based waveguide photocatalytic material with persulfate is used to treat oilfield wastewater through a photocatalytic bed. Photogenerated charge carriers activate persulfate to generate sulfate radicals and hydroxyl radicals, which oxidize and degrade organic pollutants. Real-time monitoring and enhanced operating condition adjustments are combined to improve the treatment effect.

Benefits of technology

It achieves efficient removal of organic pollutants from oilfield wastewater, and is particularly suitable for treating high concentrations of hydrophobic organic pollutants and emulsified oil. The TOC removal rate is no less than 75%, and the material utilizes surplus coal tar pitch resources, making it green and environmentally friendly.

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Abstract

The present application relates to the field of oilfield wastewater treatment, in particular to a method for treating organic pollutants in oilfield wastewater based on activated carbon and activated persulfate, which comprises loading coal pitch-based waveguide photocatalytic material in the form of a fixed bed into a packed bed reactor with light transmission, pumping oilfield wastewater to be treated from the water inlet of the packed bed reactor to the bottom of the packed bed reactor, and continuously adding persulfate solution into the water inlet pipe; turning on the visible light source; setting a TOC analyzer and a UV spectrophotometer at the water outlet of the packed bed reactor for real-time monitoring of water quality parameters of the effluent. The existing method has poor removal effect on organic pollutants, but the method provided by the present application has good removal effect on organic pollutants.
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