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Treatment method for oil sludge

A treatment method and oil sludge technology, applied in the direction of sludge treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problems of environmental and human hazards, difficult to degrade, low oil recovery rate, etc., to achieve environmental and Friendly to human health, mild washing conditions, and environmentally friendly effects

Inactive Publication Date: 2019-12-03
金华北顿生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the chemical surfactants used are petroleum-based polymers, which are difficult to degrade and cause serious harm to the environment and human body, and the recovery rate of oil is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The lipopeptide aqueous solution of 0.5, 1, 2, 5, 10, 20 g / L is configured, and the lipopeptide is the concentrate (content is 30%) of Bacillus subtilis fermentation broth. Mix the oil sludge and lipopeptide aqueous solution according to the mass ratio of 1:2, place in a 50 degree water bath, stir at 1000rpm for 30min, then add 1M H 2 SO 4 Adjust the pH to about 3, let it stand at 50 degrees for 0.5h, recover water, oil and mud respectively, measure the oil content in the mud, and calculate the oil removal rate. The water content in the recovered oil phase is about 0.5-1.5%, basically meeting the requirement of recycling. If the moisture content is required to be lower than 0.5%, it can be processed by a disc centrifuge. The oil removal rate in the mud phase can be as high as 90%, as shown in the table below. In addition, after sludge treatment, there is almost no oil in the water phase, indicating that the oil removed from the sludge completely floats on the upper l...

Embodiment 2

[0024] A 1 g / L lipopeptide aqueous solution is configured, and the lipopeptide is the concentrate (30% content) of the Bacillus subtilis fermentation broth. The oil sludge and lipopeptide aqueous solution were mixed according to different mass ratios, placed in a 50°C water bath, stirred at 1000rpm for 30min, and then 1M H 2 SO 4 Adjust the pH to about 3, let it stand at 50 degrees for 0.5h, recover water, oil and mud respectively, measure the oil content in the mud, and calculate the oil removal rate. The method of the invention can efficiently remove the oil in the oil sludge, and at the same time realize the recovery of the oil phase.

[0025] Sludge: water ratio Oil phase removal rate (%) 2:1 44.2 1:1 55.7 1:2 76.1 1:3 92.8 1:4 94.9 1:5 95.2

Embodiment 3

[0027] Configure 1g / L lipopeptide aqueous solution, the lipopeptides are pure product (separated and purified by column chromatography), fermentation broth (10g / L), acidified concentrate (content is 30%), extract concentrate (content is 80%) ). Mix the oil sludge and lipopeptide aqueous solution at a mass ratio of 1:3, place in a 50°C water bath, stir at 1000rpm for 30min, and then add 1M H 2 SO 4 Adjust the pH to about 3, let it stand at 50 degrees for 0.5h, recover water, oil and mud respectively, measure the oil content in the mud, and calculate the oil removal rate. The results showed that the above mentioned lipopeptides from different sources could remove oil from sludge well.

[0028] Types of lipopeptides Oil phase removal rate (%) Pure lipopeptide 94.9 fermentation broth 93.5 acidified concentrate 93.3 extract concentrate 95.2

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PUM

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Abstract

The invention discloses a treatment method for oil sludge. According to the method provided by the invention, biosurfactant lipopeptide with superior surface / interface activity is used as an oil sludge cleaning agent for washing the oil sludge to desorb oil from the oil sludge, at the same time, an acid is added for post-treatment, so that an oil phase, a sludge phase and a water phase are separated, and oil recovery can be realized; the lipopeptide can be a fermentation broth of bacillus subtilis, a crude extract of the fermentation broth, or a purified pure product, and the lipopeptide can be used alone or in combination with a chemical surfactant; and the method provided by the invention can efficiently remove the oil in the oil sludge, is simple to operate and environmentally friendly,and has good application prospects in the harmless treatment and resource recovery of the oil sludge.

Description

technical field [0001] The invention relates to the field of oil pollution treatment, in particular to an efficient oil sludge treatment method. Background technique [0002] With the rapid development of the petroleum industry, a large amount of oil sludge will inevitably be produced in the process of petroleum extraction, transportation, storage and processing. Most of these sludges contain high crude oil (mineral oil) content, and direct discharge will not only bring serious harm to the environment and human health, but also cause a waste of petroleum resources. In addition, with the depletion of oil resources and the decline of oil quality year by year, the amount of oil sludge produced during crude oil extraction and processing will increase. As our environmental protection requirements become more and more stringent, the treatment of this part of petroleum waste (pollutants) has gradually become a key environmental protection problem that restricts the development of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/147C10G1/00
CPCC10G1/00C02F11/147
Inventor 朱孟婕龙旭伟
Owner 金华北顿生物科技有限公司
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