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A system and method for electrocatalytic oxidation coupling biological system to treat wastewater containing polymer

A technology of electrocatalytic oxidation and oxidation system, which is applied in the field of electrocatalytic oxidation coupling biological system to treat wastewater containing polymers, can solve the problems of incomplete oxidation and removal of pollutants, unfavorable biodegradation, difficult treatment technical requirements, etc., and achieve good Effects of water environment, reduction of oxidation-reduction potential, and improvement of biodegradability

Active Publication Date: 2019-03-26
CHINA NAT OFFSHORE OIL CORP +2
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  • Claims
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Problems solved by technology

Therefore, the use of electrocatalytic oxidation technology in the treatment of high-salt refractory wastewater has great technical advantages, but at the same time there are some problems, mainly in the following aspects: ①The oxidation and removal of pollutants is not complete, especially for some macromolecules that are refractory to degradation Organic matter, after ring opening and chain breaking, becomes a small molecular substance with a more stable structure, but it is difficult to completely mineralize it into carbon dioxide and water; The consumption increases, and the treatment cost is greatly increased; ③Polymer-containing wastewater often contains a large amount of chlorinated organic matter. After advanced oxidation treatment, the structure is more stable, and some organic matter has certain toxicity, which is not conducive to biodegradation; ④When nitrogen and phosphorus in sewage When the standard is exceeded, the pure electrocatalytic oxidation process is difficult to meet the treatment technical requirements

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  • A system and method for electrocatalytic oxidation coupling biological system to treat wastewater containing polymer

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Embodiment 1

[0028] A land terminal of oil production in Liaoning Province adopts traditional technology to treat polymer-containing wastewater. With the increase of oil production, the content of polymer-containing wastewater and polymers is getting higher and higher. The salinity in the wastewater is high and contains a large amount of refractory substances, such as polycyclic aromatic hydrocarbons. , phenols, the existing treatment process load and effluent indicators are under greater pressure.

[0029] The system using the electrocatalytic oxidation coupling biological system of the present invention to treat polymer-containing wastewater has carried out a 24m3 / d pilot test on the polymer-containing wastewater, and the COD of the polymer-containing wastewater is between 324 and 418mg / L, with an average of 353mg / L, NH 4 + -N is between 60 and 80mg / L, conductivity is around 8700us / cm, chloride root content is between 2310 and 2852mg / L, the hydraulic retention time of poly-containing was...

Embodiment 2

[0031] An oil production terminal in Heilongjiang Province adopts oil separation + air flotation + traditional biochemical process to treat polymer-containing wastewater. With the deep exploitation of the oil field, the amount of polymer injection increases significantly, and the polymer content in oil production wastewater is getting higher and higher, such as a large amount of polyacrylamide, broken Emulsion and antiscalant, and the salinity in the wastewater is high, and contains toxic substances such as biphenyls and phenols. The existing treatment process is often subjected to load flushing, the system is unstable, and the effluent water quality indicators are facing greater environmental pressure.

[0032] Using the electrocatalytic oxidation coupling biological system of the present invention to treat the polymer-containing wastewater system has carried out a small-scale test on the polymer-containing wastewater from oil production. The COD of the polymer-containing waste...

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Abstract

The invention discloses a system and method for treating polymer-containing waste water by an electrocatalytic oxidation coupling biological system. The system comprises a regulating pool (1), a water inlet pump (2), an electrocatalytic oxidation system (3), a power supply control system (4), a stable filter pool (5), a mixed reaction pool (6), a process pump (7), a biological degradation system (8) and a fan (9). The method comprises the following steps that polymer-containing waste water firstly enters the regulating pool to perform water quality and water quantity regulation, and then sequentially enter the electrocatalytic oxidation system, the stable filter pool, the mixed reaction pool and the biological degradation system to be treated; finally, the standard reaching discharging is finally achieved; the power supply control system provides direct current power supply for the electrocatalytic oxidation system; the fan provides aeration for the biological degradation system; meanwhile, the tail gas generated by the stable filter pool is exhausted from the top. Through organic combination of the electrocatalytic oxidation system, the stable filter pool and the biological degradation system, the system operation efficiency and the stability are improved.

Description

technical field [0001] The invention belongs to the field of waste water treatment in environmental engineering, and relates to a waste water treatment technology, in particular to a system and a method for treating poly-containing waste water with an electrocatalytic oxidation coupling biological system. Background technique [0002] Polymer flooding technology is one of the main technologies for increasing crude oil production. In recent years, with the deepening of my country's oilfield development, polymer flooding technology will be widely promoted and applied in oilfields, but the polymer-containing sewage produced by it has caused great troubles to oil production, especially for land terminal sewage treatment. Craft creates a lot of pressure. In general, polymer-containing wastewater has the following characteristics: ①The raw water is heavy oil wastewater with severe emulsification, which increases the processing load of the entire sewage treatment system; ②The waste...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C02F101/30
CPCC02F1/001C02F1/4672C02F1/705C02F3/02C02F9/00C02F2101/30
Inventor 钱光磊谢陈鑫滕厚开赵慧秦微李肖琳张艳芳王震李旗
Owner CHINA NAT OFFSHORE OIL CORP
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