Method for in-situ microbial remediation of petroleum-contaminated soil under the assistance of heat strengthening

A technology for microbial remediation and oil pollution, which is applied in the field of in-situ microbial remediation of petroleum hydrocarbon-contaminated soil through thermal strengthening, which can solve the problems of constraints and high remediation costs, and achieve the effects of increasing availability, high remediation efficiency, and shortening remediation period

Pending Publication Date: 2020-02-28
上海康恒环境修复有限公司
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Problems solved by technology

[0008] The purpose of the present invention is to provide a method for heat-intensified assisted in-situ microbial remediation of petroleum-contaminated soil, which can effectively solve the technical problems of high remediation costs and constraints of the natural environment in the existing in-situ remediation technology of petroleum-contaminated soil

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  • Method for in-situ microbial remediation of petroleum-contaminated soil under the assistance of heat strengthening
  • Method for in-situ microbial remediation of petroleum-contaminated soil under the assistance of heat strengthening
  • Method for in-situ microbial remediation of petroleum-contaminated soil under the assistance of heat strengthening

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Embodiment Construction

[0022] The present invention will be further described in conjunction with specific embodiments.

[0023] Aiming at a certain oil field, the technical scheme of the present invention is adopted to carry out a pilot test of soil restoration. The pilot test site is divided into Area A, Area B and Area C. In Area A, the heat-enhanced assisted in-situ microbial remediation technical solution of the present invention is adopted. In Area B, only the in-situ microbial remediation technical solution is used. In Area C, only in-situ Technical solution for thermal desorption repair.

[0024] 1. Preparation of free bacterial solution:

[0025] Take 100mL of the RCW bacteria solution for petroleum wastewater treatment and add it to 700mL enrichment medium, and cultivate it to the logarithmic growth phase (mixing bacteria for 28 hours before irradiation, and mixing bacteria for 12 hours after irradiation). Take 60 mL of the cultured strain and centrifuge. Remove the supernatant, add ste...

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Abstract

The invention relates to a method for in-situ microbial remediation of petroleum-contaminated soil under the assistance of heat strengthening, and the method comprises the following steps: preparing afree-state bacteria solution from microorganisms suitable for remediation of the petroleum-contaminated soil; preparing a bacterial liquid preparation by matching the free-state bacteria solution with a nutrient solution; according to a triangular point distribution method, using a GPS position indicator, arranging injection wells to allow point distribution parameters to ensure that the preparedbacterial liquid preparation completely covers the repair area within the diffusion radius range; injecting the bacterial liquid preparation into distributed points by adopting a high-pressure jet grouting injection device; and installing a heating device in an injection hole, and filling a gap between the injection hole and the heating device with gravel. The heating device heats the contaminated soil to a set value and keeps the temperature until the target pollutant concentration is lower than a remediation target value, and the remediation target is achieved.

Description

technical field [0001] The invention relates to the technical field of petroleum hydrocarbon-contaminated soil treatment, in particular to a method for repairing petroleum hydrocarbon-contaminated soil by assisting in-situ microorganisms through thermal strengthening. Background technique [0002] With the development of industry, people's demand for oil as "industrial blood" continues to increase, and it also plays a pivotal role in modernization. However, with the development and utilization of oil, the environmental problems are becoming more and more serious, among which soil pollution is particularly prominent. Oil pollution can change the soil structure, reduce the use function of the soil, and seriously threaten the soil ecosystem. At the same time, oil pollutants will be enriched in animals and plants through the food chain, indirectly or directly endangering people's health. Therefore, some experts and scholars will Oil-contaminated soil is likened to a "chemical t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/06B09C1/10
CPCB09C1/06B09C1/10B09C2101/00
Inventor 陈俊杰郑阳刘继东王森刘荣琴张章李奉才胡佳晨王欢王湘徽
Owner 上海康恒环境修复有限公司
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