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: 2010-06-23
西安紫瑞生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • 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 new, low-cost, and high-efficiency new way of bioremediation of polluted soil and restoration of ecological environment for the energy mining industry

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment I

[0047] In the newly abandoned mud pool, 200 tons of fresh waste mud discharged from oil and gas field drilling are treated. 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 pitch 3-5%, SMC (sulfonated lignite) 3 -5% or PSC (lignite resin) 3-5%, zwitterionic polymer viscosity reducer XY-27 1.0-1.2%, SMT (sulfonated tannin) 3-5%, FRH (lubricant) 3-5%, CaCO 3 2%, (more than 2500 mesh) and other components. In the leaching solution, aluminum>3mg / L, total chromium>10mg / L, and hexavalent chromium>1.5mg / L.

[0048] Aspergillus oryzae, Bacillus subtilis, Pseudomonas fluorescens, Acinetobacter calcoaceticus and Rhodococcus erythropolis were successively cultured in test tubes and shake flasks respectively. Cultivation, seed tank culture, the bacterial suspension cultured in the seed tank...

Embodiment 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 are treated. The water content of the waste mud is 3 2% (more than 2500 mesh) and other components. In the leaching solution, aluminum>3mg / L, total chromium>10mg / L, and hexavalent chromium>1.5mg / L.

[0059] Aspergillus oryzae, Bacillus subtilis, Pseudomonas fluorescens, Acinetobacter calcoaceticus and Rhodococcus erythropolis were successively cultured in test tubes and shake flasks respectively. Cultivation, seed tank culture, the bacterial suspension cultured in the seed tank is inoculated according to the ratio of 5-10% (volume percentage), respectively connected to the fermenter liquid culture, the culture temperature is 25-35 ° C, and the culture time is 24-72 hours , microscopic examination of the bacteria suspension in the fermenter respectively, and the number of viable bacteria was ≥10 9 Ind...

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PUM

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Abstract

The invention relates to the polluted soil microorganism harmless treatment technology field, in particular to an oil and gas field waste drilling mud microorganism harmless treatment method. aspergillus oryzae, bacillus subtilis, pesudomonas fluorescence, acinetobacter calcoaceticus and rhodococcus erythropolis are cultured into solid inoculants for production respectively and successively through the tube culture, the shake-flask culture, the seeding tank culture, the fermentor culture and the sterilization solid medium culture and are mixed into solid mixed agent for the production. The agent accesses to discharged waste mud in the oil and gas field drilling process and is stirred evenly. The culture temperature and the time of the microorganism harmless treatment of the mud are controlled. The treatment process can be implemented in an oil and gas field waste drilling mud pool. Through the growth reproduction, the degradation and the transformation of the microorganism in the waste mud, the mud is detoxified, degummed, desalinated, dealkalizated and dehydrated, the polluted soil environment obtains the bioremediation, and the ecological environment is recovered.

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