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Biological flooding and washing agent for in-situ petroleum hydrocarbon pollution remediation and application thereof

A technology for pollution remediation and petroleum hydrocarbons, applied in the restoration of contaminated soil, etc., to achieve the effects of low energy consumption, lower mobility ratio, crude oil recovery rate and high efficiency of petroleum hydrocarbon treatment

Inactive Publication Date: 2021-06-18
BEIJING VICTEX ENVIRONMENTAL PROTECTION TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Based on the consideration of operational benefits, in-situ restoration without stopping operation should be selected as far as possible in the restoration method, and the restoration process must meet the requirements of site safety management and protection of existing buildings and facilities on the site, and a method for in-situ restoration is proposed Biological flooding agent for petroleum hydrocarbon pollution restoration and its application. The biosurfactant rhamnolipid used in the present invention has strong emulsification, solubilization and wetting effects, and can promote the pollution of various insoluble petroleum hydrocarbons in soil particles. Desorption and dissolution of substances

Method used

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  • Biological flooding and washing agent for in-situ petroleum hydrocarbon pollution remediation and application thereof
  • Biological flooding and washing agent for in-situ petroleum hydrocarbon pollution remediation and application thereof
  • Biological flooding and washing agent for in-situ petroleum hydrocarbon pollution remediation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A biological flushing agent for in-situ petroleum hydrocarbon pollution restoration, comprising the following components in mass percent: 30% rhamnolipid, 1% xanthan gum, 5% sodium carbonate, and 64% water.

[0025] Quartz sand sample preparation: dry the quartz sand with a diameter of 0.5-1mm and mix it with oil from a petroleum and petrochemical company site to prepare oil-containing quartz sand with a mass fraction of 5%. Put it in an airtight container and place it at room temperature for aging for 7 days. Put the aged oil-containing quartz sand into the washing column, and compact it to obtain a quartz sand sample with a volume of 257ml, a weight of 350g, and a porosity of 35%.

[0026] Use of biological detergency agent: The biological detergency agent is prepared into a 0.8% solution with tap water, and 90ml of the biological detergency agent solution is injected into the soil sample. The lotion solution was injected three times in total. The eluate is collecte...

Embodiment 2

[0032] The weight ratio of the components of the biological detergency agent is as follows: 30% rhamnolipid, 0.5% xanthan gum, 5% sodium carbonate, and 64.5% water.

[0033] Soil sample preparation: Pass the 10-15m underground oil-contaminated soil from a petroleum and petrochemical enterprise through a 5-mesh sieve, put it into a leaching column, and compact it to obtain a soil sample with a volume of 300ml, a weight of 440g, and a porosity of 30%.

[0034] Use of biological detergency agent: prepare a 1% solution of the biological detergency agent with tap water, inject 90ml of the biological detergency agent solution into the soil sample, and inject a corresponding volume of tap water when no liquid flows out of the soil sample. A total of three times of biological flooding agent and three times of tap water were injected in the way of alternate washing, and the eluate of each time was collected to recover the crude oil in the upper layer. The recovery rate of petroleum hyd...

Embodiment 3

[0040] The weight ratio of each component of the bio-washing agent is as follows: 20% rhamnolipid, 1% guar gum, 8% sodium carbonate, and 71% water.

[0041] Soil sample preparation: Pass the 10-15m underground oil-contaminated soil from a petroleum and petrochemical company through a 5-mesh sieve, put it into a washing column, and compact it to obtain a soil sample with a volume of 300ml and a porosity of 30%.

[0042]Use of bio-repellent: prepare a 1.2% solution of bio-repellent with tap water, inject 90ml of bio-repellent solution into the soil sample, and inject the corresponding volume of biological Detergent solution, a total of three injections. The eluate is collected each time, and the upper layer crude oil is recovered. The recovery rate of petroleum hydrocarbons after three leaching with biological flooding agent was 56.73%, and the elution efficiency calculated based on the amount of crude oil eluted and the amount of petroleum hydrocarbons in the eluent was 61.59%...

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Abstract

The invention discloses a biological flooding and washing agent for in-situ petroleum hydrocarbon pollution remediation and application thereof. The biological flooding and washing agent comprises the following components in percentage by mass: 10-30% of a rhamnolipid biosurfactant, 0.5-1% of a biopolymer, 5-10% of sodium carbonate and the balance of water. The biological flooding and washing agent has the following beneficial effects: the adopted biosurfactant rhamnolipid has strong emulsification, solubilization and wetting effects, and can promote desorption and dissolution of a plurality of insoluble petroleum hydrocarbon pollutants in soil particles. Meanwhile, due to the emulsifying and solubilizing effects of rhamnolipid, the efficiency of utilizing petroleum hydrocarbon by microorganisms in soil can be promoted. By adding the biopolymer, the viscosity of the flooding agent can be improved, the mobility ratio is reduced, the swept volume is enlarged, the oil carrying capacity of the system is improved, and the treatment effect is synergistically enhanced. After sodium carbonate is added, the injection system is in a weak base environment, so that the emulsifying capacity of the biological flooding agent can be improved, and no influence is caused on formation microorganisms and no stimulation is caused on biological metabolism.

Description

technical field [0001] The invention relates to a biological flushing agent, in particular to a biological flushing agent for in-situ petroleum hydrocarbon pollution restoration and its application, and belongs to the technical field of soil in-situ control and restoration application in petroleum and petrochemical enterprises, gas stations and other sites. Background technique [0002] At present, my country's annual oil production has exceeded 180 million tons, of which nearly 600,000 tons of crude oil flow directly into the surrounding environment because it cannot be recovered. Petroleum pollution is the main form of damage to soil resources in my country. During the process of oil exploitation, transportation, loading and unloading, processing and use, leakage caused by unexpected accidents, corrosion of oil pipelines and oil storage tanks, and various Falling oil caused by human factors may cause soil pollution. After petroleum substances enter the soil, they will not ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/02
CPCB09C1/02B09C2101/00
Inventor 赵修全金艳方寇焕起殷艺航寇秋丽
Owner BEIJING VICTEX ENVIRONMENTAL PROTECTION TECH DEV
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