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Method for treating tertiary oil recovery wastewater by combining efficient dominant bacteria and flocculent precipitate

A technology of oil production wastewater and dominant bacteria, which is applied in flocculation/sedimentation water/sewage treatment, mining wastewater treatment, chemical instruments and methods, etc. It can solve problems such as low wastewater treatment rate, sludge system collapse, and difficulty in degrading emulsified oil. , to achieve the effect of high efficiency, low cost and easy realization

Inactive Publication Date: 2014-04-02
天津市工业微生物研究所有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is difficult to degrade the emulsified oil
However, when the traditional activated sludge method is used to treat oil production wastewater, microorganisms are inhibited, resulting in problems such as low wastewater treatment rate, sludge system collapse, and wastewater discharge that cannot meet the standards. At present, no company has completely treated tertiary oil recovery wastewater.

Method used

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  • Method for treating tertiary oil recovery wastewater by combining efficient dominant bacteria and flocculent precipitate
  • Method for treating tertiary oil recovery wastewater by combining efficient dominant bacteria and flocculent precipitate
  • Method for treating tertiary oil recovery wastewater by combining efficient dominant bacteria and flocculent precipitate

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Effect test

Embodiment 1

[0019] A method for treating tertiary oil recovery wastewater by utilizing high-efficiency dominant bacteria combined with flocculation and sedimentation, the steps of the method are:

[0020] ⑴. Select 1Kg of tertiary oil recovery wastewater from an oil production plant in Daqing Oilfield, and add 10% of the mixed solution for the first time, and a total of 100g of mixed solution is required. Among them, in the mixed solution, the mixing weight ratio is compound bacterial solution: nutrient solution = 1:9, then 10g of compound bacterial solution and 90g of nutrient solution are required.

[0021] ⑵, Bacillus albicans NKCCMR NK.DG-1, Bacillus pumilus NKCCMR NK2.10-1, Bacillus subtilis AS1.107, Pseudomonas oleander AS1.1641, Brevibacterium halotolerant NKCCMR NK2.B-3 five The microbial liquid is mixed evenly in the weight ratio of 1:2:2:2:3 to form a compound bacterial liquid. Calculated on the basis of 10g of the compound bacterial liquid, Bacillus albicans NKCCMR NK.DG-11g, B...

Embodiment 2

[0028] A method for treating tertiary oil recovery wastewater by utilizing high-efficiency dominant bacteria combined with flocculation and sedimentation, the steps of the method are:

[0029] ⑴. The effective volume is 1m 3 The treatment device is the tertiary oil recovery wastewater of an oil production plant in Daqing Oilfield. The ratio of the first mixed solution to be added is 10%, and a total of 100Kg of mixed solution is required. Among them, in the mixed solution, the mixing weight ratio is compound bacterial solution: nutrient solution = 1:9, then 10Kg of compound bacterial solution and 90Kg of nutrient solution are required.

[0030] ⑵. According to the water quality of this wastewater, Bacillus albicans NKCCMR NK.DG-1, Bacillus pumilus NKCCMR NK2.10-1, Bacillus subtilis AS1.107, Pseudomonas oleander AS1.1641, Brevibacterium halotolerant NKCCMR NK2.B-3 five kinds of microbial bacterial liquids are mixed evenly in a weight ratio of 2:3:1:2:2 to form a compound bacte...

Embodiment 3

[0037] The field test of treating tertiary oil recovery wastewater by using high-efficiency dominant bacteria combined with flocculation and sedimentation has a sewage treatment scale of 3,000 tons / day: the specific implementation steps are as follows:

[0038]⑴. Using the field experiment of the tertiary oil recovery wastewater treatment station of an oil production plant in Daqing, the effective volume of the sewage treatment structure of the sewage treatment station is 4500m3, and the mixed solution dosage ratio is 3% of the effective volume, and a total of 135 tons of mixed solution is required. Among them, in the mixed solution, the mixing weight ratio is compound bacterial solution: nutrient solution = 1:4, then 27 tons of compound bacterial solution and 108 tons of nutrient solution are required.

[0039] (2) According to the wastewater quality on site, Bacillus albicans NKCCMR NK.DG-1, Bacillus pumilus NKCCMR NK2.10-1, Bacillus subtilis AS1.107, Pseudomonas oleander AS1...

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Abstract

The invention relates to a method for treating tertiary oil recovery wastewater by combining efficient dominant bacteria and flocculent precipitate. The method comprises the following steps: (1) uniformly mixing five kinds of microbial liquids such as white bacillus, bacillus pumilus, bacillus subtilis, pseudomonas oleovorans and brevibacterium halotolerans according to a weight ratio to prepare a compound bacterial liquid; (2) preparing a nutrient solution; (3) mixing the compound bacterial liquid and the nutrient solution to form a mixed liquid; (4) conveying the tertiary oil recovery wastewater to a hydrolysis pool with the mixed liquid and staying for 12 to 16 hours, and then conveying to an aerobic pool with the mixed liquid and staying for 12 to 48 hours; (5) adding a flocculating agent into wastewater subjected to aerobic treatment, performing flocculating precipitation, and continuously discharging supernate. The method is a method for treating the tertiary oil recovery wastewater by using microorganisms, and has the advantages of low cost, no toxicity, no pollution, high efficiency, easiness in implementation and the like.

Description

technical field [0001] The invention relates to the technical field of industrial sewage treatment, in particular to a method for treating tertiary oil recovery wastewater by combining high-efficiency dominant bacteria and flocculation sedimentation. Background technique [0002] As my country's demand for oil continues to increase, oil is a limited non-renewable energy source, and now the opportunity to find large oil storage oil fields is decreasing, and the developed oil fields are aging. Therefore, using tertiary oil recovery technology to enhance crude oil recovery is a slow The production decline rate of most oilfields in my country is a strategic need to maintain stable crude oil production. At present, the tertiary oil recovery technology that has been industrialized in my country is mainly chemical flooding. The so-called chemical flooding tertiary oil recovery technology is the ASP flooding technology of "alkali + polymer + surfactant". However, while this technolo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F3/34C02F1/52C02F103/10
Inventor 魏呐吴頔许勤虎温冰孙武岳张英筠程伟曹琳琳韩慧赵琼
Owner 天津市工业微生物研究所有限公司
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