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Photoelectrocatalysis/Fenton coupling processing system and processing method of high-salt polymer-containing wastewater

A photoelectric catalysis and treatment system technology, which is applied in water/sewage treatment, mining wastewater treatment, light water/sewage treatment, etc., can solve the problem of limited contact area between catalysts and pollutants, achieve reduced energy consumption, mild reaction conditions, The effect of improving efficiency

Active Publication Date: 2015-06-17
CNOOC TIANJIN CHEM RES & DESIGN INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

One class is based on TiO 2 Photoelectrocatalysis of photoanodes, TiO 2 The loaded electrode acts as an anode and a photocatalyst, but its disadvantage is that the contact area between the catalyst and pollutants is limited

Method used

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  • Photoelectrocatalysis/Fenton coupling processing system and processing method of high-salt polymer-containing wastewater
  • Photoelectrocatalysis/Fenton coupling processing system and processing method of high-salt polymer-containing wastewater
  • Photoelectrocatalysis/Fenton coupling processing system and processing method of high-salt polymer-containing wastewater

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Embodiment

[0040] This embodiment is an application embodiment of the device and method of the present invention for actually treating wastewater. The biochemical effluent of oil production wastewater from an oil production plant in Liaoning has a chloride ion concentration of 4000-5000mg / L, a conductivity of about 11000μs / cm, COD250-350mg / L, and petroleum 20-30mg / L. High salt has a strong inhibitory effect on biochemical effects, and the biochemical effluent does not meet the standard. The advanced treatment test of biochemical effluent was carried out by using electrolysis-photoelectrocatalysis / Fenton coupling wastewater treatment device. Current density 15mA / cm 2 , residence time 10min, current density 5mA / cm 2 , air velocity 18m 3 / h, residence time 30min, effluent COD<50mg / L, petroleum <3mg / L, meeting water quality discharge requirements.

[0041] water sample

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Abstract

The invention relates to a photoelectrocatalysis / Fenton coupling processing system of high-salt polymer-containing wastewater. The system comprises an electrolyzing device and a photoelectrocatalysis / Fenton reaction device, wherein the electrolyzing device is used for carrying out quick demulsification and separation on the high-salt polymer-containing wastewater under the effect of an electric field to obtain a subnatant; introducing a photoelectric Fenton reaction into a photoelectrocatalysis system by the photoelectrocatalysis / Fenton reaction device, and carrying out further improvement on a photoelectric catalyst, so that the TiO2 photoelectrocatalysis reaction is combined with the photoelectric Fenton reaction, the catalytic efficiency of a photoelectric integrated device is improved, the system is combined with an electrolytic demulsification technology of the electrolytic device, and deep processing on the high-salt polymer-containing wastewater is realized. The invention also provides a deep processing method of the high-salt polymer-containing wastewater, quick demulsification is firstly carried out on the wastewater through electrolytic preprocessing to remove a majority of oils, and then remaining pollutants are removed through a photoelectrocatalysis / Fenton coupling processing device, so that up-to-standard release of the polymer-containing wastewater is realized.

Description

technical field [0001] The invention relates to the technical field of high-salt and poly-containing wastewater treatment, in particular to a photoelectric catalysis / Fenton coupling treatment system and an advanced treatment method for high-salt and poly-containing wastewater. Background technique [0002] Polymer flooding technology, as one of the main technologies for increasing crude oil production, has been applied in domestic oil fields, but the COD-containing wastewater produced by it has a wide range of sources and complex components, and the water contains phenol, naphthenes, polycyclic aromatic hydrocarbons, etc., which are not easy to be degraded by microorganisms Crude oil components, and various chemicals (including demulsifiers, defoamers, corrosion inhibitors, scale inhibitors, etc.) great. At present, the combined process of "physicochemical + biochemical" is generally used in the treatment of polymer-containing wastewater in oilfields at home and abroad. How...

Claims

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Application Information

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IPC IPC(8): C02F9/08C02F1/32C02F1/46C02F1/461C02F1/72C02F103/10
Inventor 李肖琳谢陈鑫秦微赵慧钱光磊滕厚开张艳芳
Owner CNOOC TIANJIN CHEM RES & DESIGN INST
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