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

A combined process, Fenton oxidation technology, applied in chemical instruments and methods, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc. The effect of good water quality, short treatment time, and improved purification effect

Active Publication Date: 2013-12-18
CNOOC TIANJIN CHEM RES & DESIGN INST +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These processes have the disadvantages of large consumption of chemicals and high processing costs.

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] For a drilling wastewater, the initial COD is 12000mg / L, TN is 28mg / L, TP is 78mg / L, S 2- After primary fenton oxidation, COD is 9500mg / L, TN is 28mg / L, TP is 78mg / L, S 2- After flocculation and precipitation, COD is 9500mg / L, TN is 28mg / L, TP is 18mg / L, S 2- After hydrolysis and acidification, the COD is 9000mg / L, enters the UASB anaerobic reaction device, stays for 26h, the effluent COD is 4000mg / L, TN is 27mg / L, TP is 17.5mg / L, S 2- After secondary fenton oxidation, COD is 2500mg / L, TN is 27mg / L, TP is 17.5mg / L, primary contact aerobic effluent COD is 1000mg / L, TN is 15mg / L, TP The COD of the secondary contact aerobic effluent is 450mg / L, the TN is 5mg / L, and the TP is 3g / L, reaching the COD and the third-level emission standards.

Embodiment 2

[0060] For a drilling wastewater, the initial COD is 10000mg / L, TN is 35mg / L, TP is 64mg / L, S 2- After primary fenton oxidation, COD is 8200mg / L, TN is 34mg / L, TP is 63mg / L, S 2- After flocculation and precipitation, COD is 8000mg / L, TN is 34mg / L, TP is 15mg / L, S 2- After hydrolysis and acidification, the COD is 8000mg / L, enters the UASB anaerobic reaction device, stays for 26h, the effluent COD is 3400mg / L, TN is 32mg / L, TP is 14mg / L, S 2- After secondary fenton oxidation, COD is 2000mg / L, TN is 32mg / L, TP is 14mg / L, primary contact aerobic effluent COD is 800mg / L, TN is 15mg / L, TP is 8mg / L, the COD of the secondary contact aerobic effluent is 350mg / L, the TN is 5mg / L, and the TP is 3g / L, which has reached the COD and the third-level discharge standard.

Embodiment 3

[0062] For a drilling wastewater, the initial COD is 14000mg / L, TN is 18mg / L, TP is 68mg / L, S 2- After primary fenton oxidation, COD is 10000mg / L, TN is 18mg / L, TP is 68mg / L, S 2- After flocculation and precipitation, COD is 9500mg / L, TN is 18mg / L, TP is 15mg / L, S 2- After hydrolysis and acidification, the COD is 9200mg / L, enters the UASB anaerobic reaction device, stays for 26h, the effluent COD is 4400mg / L, TN is 17mg / L, TP is 14.5mg / L, S 2- After secondary fenton oxidation, COD is 2800mg / L, TN is 17mg / L, TP is 14.5mg / L, primary contact aerobic effluent COD is 1200mg / L, TN is 10mg / L, TP The COD of the secondary contact aerobic effluent is 450mg / L, the TN is 5mg / L, and the TP is 3g / L, reaching the COD and the third-level emission standards.

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14
Inventor 杨勇霍莹郑贝贝张莹付连超张艳芳
Owner CNOOC TIANJIN CHEM RES & DESIGN INST
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