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Biological composting processing method of oil-based drilling wastes

An oil-based drilling and treatment method technology, which is applied in the direction of bio-organic part treatment, organic fertilizer, fertilization device, etc., can solve the problems of high safety risk of oil-based drilling waste transportation, unutilized resources, and high treatment cost, and achieve The effect of reducing transportation risk, high economic applicability, and high degradation efficiency

Active Publication Date: 2015-07-29
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In order to solve the problems of high safety risk of oil-based drilling waste transportation, high processing cost, secondary pollution and resource utilization in the prior art, the embodiment of the present invention provides a biological composting treatment of oil-based drilling waste method

Method used

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  • Biological composting processing method of oil-based drilling wastes
  • Biological composting processing method of oil-based drilling wastes
  • Biological composting processing method of oil-based drilling wastes

Examples

Experimental program
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Embodiment 1

[0046] as attached figure 1 As shown, the embodiment of the present invention provides a biocomposting method of oil-based drilling waste, the method is:

[0047]Step 101. Separating, purifying, and screening strains that efficiently degrade petroleum hydrocarbons from oil-based drilling waste, and conducting indoor orthogonal experiments to obtain the optimal ratio of strains that can efficiently degrade the solid compound bacterial agent, namely Calculated in parts by weight of the bacterial suspension: 4 parts of Micrococcus luteus; 2 parts of Pseudomonas;

[0048] Step 102, mixing the oil-based drilling waste and the solid compound bacterial agent evenly.

[0049] Step 103, adding rice bran to the oil-based drilling waste containing the solid compound bacterial agent, and mixing evenly to obtain an oil-based drilling waste compost heap.

[0050] Step 104 , adjusting the carbon-to-nitrogen ratio and water content of the oil-based drilling waste compost heap, turning over ...

Embodiment 2

[0054] An embodiment of the present invention provides a biological composting treatment method for oil-based drilling waste, the method comprising:

[0055] Step 201: Separating and obtaining bacteria that can degrade petroleum hydrocarbons from oil-based drilling waste, isolating, purifying, and screening highly efficient degrading bacteria using oil-based drilling waste as the only carbon source, and conducting indoor orthogonal experiments, Obtain the optimal proportioning ratio of the highly efficient degrading bacterial classification of preparation solid compound bacterial agent, count 4 parts of Micrococcus luteus in terms of the weight part of bacterial suspension; 2 parts of Pseudomonas; 1 part of Bacillus subtilis, and above-mentioned formula The specific strains are formulated into solid compound bacterial agents.

[0056] Wherein, the preparation method of the solid compound bacterial agent is specifically: mixing the bacterial suspensions of Micrococcus luteus, P...

Embodiment 3

[0075] Preparation of solid compound bacterial agent:

[0076] 1: Isolation and purification of oil total hydrocarbon degrading bacteria

[0077] (1) Preparation of soil suspension

[0078] Collect different oil-based drilling waste samples, weigh 10g under sterile conditions, put them into a 250ml triangular flask filled with 90ml sterile water to make a sample suspension, the concentration is 10- 1 . Shake for 30 minutes on a constant temperature shaker, and then dilute with a 10-fold dilution method.

[0079] (2) Preparation of diluent

[0080]Under sterile conditions, use a sterile pipette to draw 1.0ml from the soil suspension and pour it into a test tube filled with 9.0ml sterile water, blow and suck three times, and mix well to obtain a concentration of 10 -2 diluent. Then use another 1ml sterile pipette to draw 1.0ml of the solution from the test tube and inject it into another test tube filled with 9.0ml sterile water, and so on to make 10 -3 , 10 -4 , 10 -5 ,...

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Abstract

The invention discloses a biological compost processing method of oil-based drilling wastes. The method comprises the following steps: screening strains capable of efficiently degrading petroleum hydrocarbons from the oil-based drilling wastes, and carrying out orthogonal experiment to prepare a solid compounded inoculant; adding the solid compounded inoculant into the oil-based drilling wastes, adding rice chaff as a supporter, and uniformly mixing to obtain compost of the oil-based drilling wastes; and adjusting the carbon / nitrogen ratio and the water content of the compost, turning, and carrying out sampling analysis to complete onsite composting. The degradation rate of total petroleum hydrocarbons in the oil-based drilling wastes reaches above 80% 1 month after the method is used to process the oil-based drilling wastes; and compost obtained in the invention can be used for planting plants, and the growth vigor of the plants is good within 3 months. The method has the advantages of simple process, simple required capital construction facility, handy enforcement surrounding a well site, short cycle, easy control, high degradation efficiency of the oil-based drilling wastes, low processing cost, and solving of troubles in economy and environmental protection for efficient exploitation of oil and gas fields.

Description

technical field [0001] The invention relates to a treatment technology for oil-containing drilling waste generated during oil and gas drilling with oil-based drilling fluid, in particular to a biological composting treatment method for oil-based drilling waste. Background technique [0002] A large amount of oil-based drilling waste is generated during oil and gas drilling with oil-based drilling fluid. Oil-based drilling waste is a highly toxic complex multiphase system containing petroleum hydrocarbons, phenolic compounds, and heavy metals. It is clearly marked as HW08 hazardous waste in the National Hazardous Waste List. If the oil-based drilling waste is discharged directly, it will cause serious damage to the ecological environment and endanger the survival of human beings. It can be seen that it is necessary to treat oil-based drilling waste into environmentally friendly substances. [0003] In the prior art, the above-mentioned drilling waste is usually transported ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05F17/00C05F7/00
CPCY02A40/20Y02W30/40
Inventor 胡金燕徐炳科张国斌向启贵刘春艳李伟谢倩雯陆林峰易畅赵成君
Owner PETROCHINA CO LTD
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