Method for disposing high-salt high-polymer wastewater through Fenton oxidation and biology combined technology

Abstract

The invention provides a method for disposing high-salt high-polymer wastewater through the Fenton oxidation and biology combined technology. The disposed high-salt high-polymer wastewater is drilling wastewater. The method is characterized in that the technology comprises primary chemical oxidization, filtration, phosphorous removal, sedimentation, filtration, hydrolyzation, anaerobic processing, secondary chemical oxidization, primary aerobiotic processing and secondary aerobiotic processing. Firstly, due to the fact that the B / C ratio of the wastewater is low, primary chemical oxidization method processing is conducted on the wastewater the B / C ratio can be improved; after oxidized discharged water is filtrated, the water enters a phosphorous removal reaction pool and is deposited and filtrated again; the water with phosphorus removed enters a hydrolysis acidification pool and then enters a middle adjusting pool, and after a pH value is adjusted, the water enters an anaerobic reaction pool; secondary chemical oxidization method processing is conducted on anaerobic discharged water, the B / C ratio is improved, the water enters an aerobiotic biochemical system, and primary contact aerobiotic processing and secondary contact aerobiotic processing are conducted.

Description

technical field

[0001] The invention belongs to the field of waste water treatment, and relates to a method for treating high-salt and high-polymer wastewater by Fenton feton oxidation and biological combination process, wherein the high-salt and high-polymer wastewater is drilling wastewater, and the influent COD of drilling wastewater is required to be 12000 mg / L~ 15000 mg / L, after treatment, the effluent COD will reach below 500 mg / L. technical background

[0002] A large amount of drilling wastewater will be produced in the process of oilfield exploration, development and transportation, which is the largest and most polluting petroleum wastewater in the process of oil exploitation. The sources of waste water mainly include: the flowback loss of mud during drilling and tripping in; the leakage of mud circulation system; the sewage generated in the steps of washing equipment oil and cleaning platforms. The drilling wastewater system is extremely stable, containing a larg...

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