Advanced treatment technology of high-salt-content degradation-resistant oil extraction sewage

A technology for advanced treatment and oily sewage, applied in mining wastewater treatment, biological water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of low sludge settlement efficiency, low sludge settlement efficiency, and biodegradation salinity issues such as significant impact

Inactive Publication Date: 2015-12-02
佘跃惠 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] 3. Biodegradation is significantly affected by salinity
[0014] 4. Low sludge settling efficiency: Salt components in wastewater can reduce the number of protozoa and filamentous bacteria, resulting in low sludge settling efficiency

Method used

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  • Advanced treatment technology of high-salt-content degradation-resistant oil extraction sewage
  • Advanced treatment technology of high-salt-content degradation-resistant oil extraction sewage

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Example 1: Advanced treatment of high-salt oil production wastewater in an oil field:

[0056] Add highly active COD-degrading strains-W2, W5, 2D1 and 3D1 in the aerobic aerated activated sludge tank to obtain a high-concentration bacterial solution of 108CFU / ml, and then add it to 1# and 2#SBR (sequencingbatchreactor) for treatment Pool, and add carbon source sodium acetate, nitrogen source and phosphorus source ammonium dihydrogen phosphate, C / N ratio 5:1, sodium acetate final concentration 100ppm, in order to improve the treatment effect of 1# and 2#SBR. From 2013 / 6 / 1 to 2013 / 6 / 10, a total of 4.8 tons of COD-degrading bacteria solution was added to 1# and 2# SBR pools four times, 0.6 tons were added each time, and once every three days ; 1# and 2# SBR degradation COD results show that when the inlet water sample COD≤350mg / L, the outlet water sample COD is lower than 60mg / L; the inlet water sample COD range is 350mg / L-400mg / L, the outlet water sample The COD is lower...

Embodiment 2

[0058] After the high-concentration COD (more than 350mg / l) oil production wastewater is treated by the SBR tank, the COD of the outlet discharge is about 100mg / l, which has not reached the national first-level discharge standard. Take the external drainage with a COD of about 100mg / l and pour it into a shaker flask, inoculate 1% compound salt-tolerant Bacillus brevus degrading flora, and treat it at 140r / min for 24 hours, and the COD can be reduced to 57.92mg / l.

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Abstract

The invention discloses a salt-tolerant Brevibacillus brevis and an application of complex microorganisms thereof in advanced treatment of high salt content degradation-resistant oil extraction sewage. The salt-tolerant Brevibacillus brevis is reserved in China General Microbiological Culture Collection Center, CGMCC for short, and the preservation number is CGMCC No.2148. The bacillus can bear high salinity which reaches 70000ppm, and has a wide applicable temperature range. The Brevibacillus brevis has a high COD degradation rate for petroleum hydrocarbon and salt-containing and oil-containing degradation-resistant sewage, and at 25-45 DEG C, the COD degradation rate for high salt content sewage (whose mineralization is higher than 30000ppm) reaches 60%. Brevibacillus brevis, Bacillus subtilis (registration number KC109003.1), Bacillus circulans Jordan (registration number JX893033.1), Bacillus amyloliquefaciens (registration number JX997921.1), Pseudomonas stutzeri (registration number KC113178.1) and Pseudomonas mendocina Marinobacter (registration number EU43329.1) compose complex microorganisms. A synergism is provided for high efficiency degradation of high salt content and oil containing degradation-resistant oil extraction sewage; the COD of incoming water is lower than 350ppm, and the COD of the discharged water after treatment is lower than 60ppm.

Description

Technical field: [0001] The invention relates to the application of a compound halotolerant bacillus group for efficiently degrading petroleum hydrocarbons in the advanced treatment of high-salt and oily sewage. Background technique: [0002] In the process of oil exploitation, the produced crude oil contains a large amount of water, generally the water content is as high as 50% or more, and in the oil field in the later stage of water flooding development, the produced crude oil contains water content as high as 95%. Oil production wastewater is mainly produced together with crude oil, and is extracted after oil and gas separation and dehydration. Secondly, various devices of crude oil refining, such as electric desalination, distillation tower, etc., continuously discharge a large amount of waste water. Oil production wastewater has gone through the whole process of crude oil collection and primary processing, and the impurity components in the wastewater are closely rela...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/34C02F103/10
Inventor 佘跃惠张凡柴陆军梅平苏三宝王正良董汉平章厚名徐真谭攀袁永霞
Owner 佘跃惠
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