Microbe harmless treatment method for oil-gas field waste slurry

A technology for harmless treatment of waste mud, applied in the direction of microorganism-based methods, biochemical equipment and methods, biological sludge treatment, etc., can solve the environmental pollution caused by waste mud, and achieve the goal of reducing hazards and high degradation efficiency Effect

Active Publication Date: 2008-05-21
西安紫瑞生物科技有限公司
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  • Summary
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  • Application Information

AI Technical Summary

Problems solved by technology

The invention solves the problem of serious environmental pollution caused by waste mud discharged from drilling in oil and gas fields, and provides a

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0046] Example I:

[0047] In the newly abandoned mud pool, 200 tons of fresh waste mud discharged from oil and gas field drilling is processed. The water content of the waste mud is 60-70%, the pH value is 9-13, and the physical state is colloidal. Its main components are bentonite ≤ 4%, polyacrylonitrile sodium or calcium, ammonium ≤ 1-2%, SMP (sulfonated phenolic resin) 3-5%, sulfonated asphalt 3-5%, SMC (sulfonated lignite) 3 -5% or PSC (lignite resin) 3-5%, zwitterionic polymer viscosity reducer XY-271.0-1.2%, SMT (sulfonated tannin) 3-5%, FRH (lubricant) 3-5%, CaCO 3 2%, (more than 2500 mesh) and other composition. The leaching solution contains aluminum>3mg / L, total chromium>10mg / L, and hexavalent chromium>1.5mg / L.

[0048] Aspergillus oryzae, Bacillus subtilis, Pseudomonas fluorescens, Acinetobacter calcoaceticus and Rhodococcuserythropolis were cultured in test tube and shaken flask respectively. Cultivation and seed tank culture. The bacteria suspension cultured in the s...

Example Embodiment

[0057] Example II:

[0058] In the mud pool that has been abandoned for many years, 200 tons of waste mud that has been placed for several years after being discharged from oil and gas field drilling is processed. The water content of the waste mud is 3 2% (more than 2500 mesh) and other composition. The leaching solution contains aluminum>3mg / L, total chromium>10mg / L, and hexavalent chromium>1.5mg / L.

[0059] Aspergillus oryzae, Bacillus subtilis, Pseudomonas fluorescens, Acinetobacter calcoaceticus and Rhodococcuserythropolis were cultured in test tube and shaken flask respectively. Cultivation and seed tank culture. The bacteria suspension cultured in the seed tank is 5-10% (volume percentage) inoculated into the fermenter for liquid culture. The culture temperature is 25-35℃, and the culture time is 24-72 hours. , Microscopic examination of the bacteria suspension in the fermentation tank, the number of viable bacteria ≥10 9 Pcs / ml, cultivated into Aspergillus oryzae, Bacillus...

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PUM

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Abstract

The invention relates to the technical field of harmless treatment of polluted soil microorganisms. In particular, it relates to a microbial harmless treatment method for oil and gas field drilling waste mud. Aspergillus oryzae, Bacillus subtilis, Pseudomonas fluorescens, Acinetobacter calcoacetate and Rhodococcus erythrococcus are respectively cultured in test tubes, shake flasks, Seed tank culture, fermenter culture, and sterilized solid medium culture become solid bacterial agents for production, which are mixed in proportion to solid mixed bacterial agents for production, and the bacterial agents are connected to oil and gas fields to discharge waste mud during drilling, and after uniform stirring, Control the cultivation temperature and time of the microbial harmless treatment of mud, and the above treatment process can be carried out in the abandoned mud pool for drilling in oil and gas fields. Through the growth, reproduction, degradation and transformation of microorganisms in waste mud, the mud can be detoxified, degummed, desalinated and dehydrated, so that the polluted soil environment can be biorestored and the ecological environment can be restored.

Description

technical field [0001] The invention relates to the technical field of harmless treatment of polluted soil microorganisms. Specifically, the present invention relates to a microbial harmless treatment method for oil and gas field drilling waste mud. Aiming at the harmful components in the waste mud discharged from oil and gas field drilling, the microbial composite flora with high-efficiency degradation and transformation ability is selected and used. Through complex biological and chemical processes, the harmful components in the waste mud that are harmful to the ecological environment are efficiently degraded and transformed to detoxify, degumming, desalination, and dehydration to achieve the purpose of microbial harmless treatment. The contaminated soil environment after oil and gas field drilling is biorestored, and the ecological environment is restored. Background technique [0002] The waste mud discharged during oil and gas field drilling contains potassium dichroma...

Claims

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Application Information

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IPC IPC(8): C02F11/02C12N1/14C12N1/20C12R1/125C12R1/69C12R1/39
Inventor 陈五岭
Owner 西安紫瑞生物科技有限公司
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