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Method of treating oil sludge with surfactant

A surfactant and oil sludge technology, which is applied in the field of treating oil sludge with surfactants, can solve the problems of biosurfactant production costs limiting commercial applications, and achieve the effects of less secondary pollution, low temperature, and high emulsifying ability

Inactive Publication Date: 2015-07-08
ZHEJIANG OCEAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the cost of production of such fermentation-based biosurfactants limits their commercial application

Method used

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  • Method of treating oil sludge with surfactant

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Embodiment 1

[0021] The aqueous solution of sodium cholate with a concentration of 0.1g / L (the price of feed-grade sodium cholate used in this example is between 8,000 and 10,000 yuan / ton) was used to sprinkle crude oil on the farmland soil in Ma'an Village, Changzhi Island. The ground oil sludge formed within 3 days is subjected to thermochemical washing treatment, the stirring speed is 200r / min, the mass ratio of the aqueous solution of sodium cholate to the ground oil sludge is 2:1, the washing temperature is 50°C, and the washing time is 30min. The pH value of the aqueous solution was adjusted to 9 with 0.1 mol / L NaOH aqueous solution. The resulting treated oily sludge is designated as sample 1.

[0022] The washing efficiency of the sample 1 was measured, and the washing efficiency of the sample 1 was 87.5%.

[0023] Follow the same procedure as above, only replacing the aqueous solution of sodium cholate at a concentration of 0.1 g / L with Na at a concentration of 5 g / L 2 CO 3 Aque...

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Abstract

The invention discloses a method of treating oil sludge with a surfactant, which comprises a step of washing the oil sludge with an aqueous solution of cholate to complete the treatment of the oil sludge. In the invention, a feed-grade bio-surfactant cholate is used for treating the oil sludge. The cholate has the advantages of bio-surfactant diversity, a high surface activity, a low toxicity, a high emulsification capability and a high selectivity and is easy to degrade by microorganisms and can overcome a defect that the bio-surfactant is high in cost. The bio-surfactant can reduce damage of the oil sludge to environment and soil. The cholate is less in use amount in a thermochemical washing process of oil sludge and is low in required temperature. The waste water is easy to degrade and is not liable to cause secondary pollution. The treatment method is simple in operation, is low in energy consumption, is in conformity with a strategy of sustainable development of our country and is economical and environmental-protective.

Description

technical field [0001] The invention belongs to the field of chemical environmental protection and relates to a method for treating oil sludge with a surfactant. Background technique [0002] Today's petroleum industry, along with the exploitation, refining, storage and transportation of petroleum, produces a large amount of waste oil sludge. Because the oil sludge contains a large number of toxic substances that cause disease and cancer, such as benzene, phenol, and anthracene. If the waste sludge is not treated, it will cause serious pollution to the environment and endanger human health. [0003] The existing thermochemical washing treatment of oil sludge technology mainly uses chemical surfactants. However, the use of chemical surfactants is easy to cause a series of problems such as environmental toxicity and biodegradation pressure. [0004] Biosurfactants are mainly produced by bacteria and yeast, and can also be obtained from plants, animals and even the human body...

Claims

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Application Information

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IPC IPC(8): C02F11/00
Inventor 王玉华徐嘉康严韩平陈英陈东
Owner ZHEJIANG OCEAN UNIV
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