CN110526548A - A kind of oil-sludge treatment method - Google Patents

A kind of oil-sludge treatment method Download PDF

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Publication number
CN110526548A
CN110526548A CN201910837193.9A CN201910837193A CN110526548A CN 110526548 A CN110526548 A CN 110526548A CN 201910837193 A CN201910837193 A CN 201910837193A CN 110526548 A CN110526548 A CN 110526548A
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CN
China
Prior art keywords
oil
lipopeptid
greasy filth
sludge treatment
acid
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201910837193.9A
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Chinese (zh)
Inventor
朱孟婕
龙旭伟
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Jinhua Bei Ton Biological Technology Co Ltd
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Jinhua Bei Ton Biological Technology Co Ltd
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Priority to CN201910837193.9A priority Critical patent/CN110526548A/en
Publication of CN110526548A publication Critical patent/CN110526548A/en
Pending legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
    • C02F11/147—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents using organic substances
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
    • C10G1/00—Production of liquid hydrocarbon mixtures from oil-shale, oil-sand, or non-melting solid carbonaceous or similar materials, e.g. wood, coal

Abstract

The present invention discloses a kind of oil-sludge treatment method.This method is washed as greasy filth cleaning agent for greasy filth using the superior biosurfactant lipopeptid of table/interfacial activity, and oil is desorbed from greasy filth and comes out, while being post-processed by acid adding, makes oil, mud, water three phase separation that can realize the recycling of oil.Lipopeptid can be the fermentation liquid of bacillus subtilis, be also possible to the crude extract of fermentation liquid, be also possible to sterling after purification.Lipopeptid can be used alone, and can also be used in compounding with chemical surfactant.Method provided by the invention can efficiently remove the oil in greasy filth, and be simple to operate and friendly to environment, and have a good application prospect in the harmless treatment of greasy filth and resource utilization.

Description

A kind of oil-sludge treatment method
Technical field
The present invention relates to oily waste treatment field more particularly to a kind of efficient oil-sludge treatment methods.
Background technique
With the rapid development of petroleum industry, inevitably produced in oil exploitation, transport, storage and process Raw a large amount of greasy filth.These greasy filth contain higher crude oil (mineral oil) content mostly, and direct emission is not only to environment and human body Health can all bring serious harm, and cause the waste of petroleum resources.In addition, as petroleum resources are increasingly depleted, petroleum Quality declines year by year, and the yield of greasy filth can be bigger in oil extraction, process.As our environmental requirements are more and more tighter Lattice, the processing of this part Oil wastes (pollutant) are increasingly becoming the key environmental protection for restricting oil exploitation and processing industry development Problem.
The traditional treatment method of greasy filth includes: solvent extraction, Thermal desorption, landfill etc..But majority exists as energy consumption is high, pollution Greatly, the problems such as operational danger is big, equipment investment is big.Biodegrade is considered as the harmless method of green, but traditional biochemistry Requirement of the system to oil content is extremely harsh (oil content need to be less than 100ppm).Although and biogenic accumulation processing can be used for high oil and contain The oil-sludge treatment of amount, but there are the period long (3-6 months), treatment effeciency low (oily residual rate may be up to 5%), be unable to satisfy environmental protection It is required that, pollute object transfer the problems such as.Chemical washing is considered as safer and effective method, by surfactant Oil is got off from greasy filth surface washing, to realize the harmless treatment of greasy filth.But used chemical surfactant is big Mostly petroleum based polyalcohol, it is difficult to degrade, serious harm can be brought to environment and human body, and the rate of recovery of oil is low.
Summary of the invention
The present invention is directed to the deficiency and defect of existing oil-sludge treatment method, proposes a kind of efficient oil-sludge treatment method.
The purpose of the present invention is achieved through the following technical solutions: a kind of oil-sludge treatment method, comprising the following steps:
(1) into greasy filth to be processed be added lipopeptid aqueous solution, and room temperature to 90 DEG C at a temperature of stirring 0.5-1h carry out Mixing；Wherein mass ratio > 1 of lipopeptid aqueous solution and greasy filth, the concentration of lipopeptid aqueous solution are 0.5-20g/L.
(2) acid for adjusting pH is added in mixed mud mixture in step (1) to 2-6.
(3) after acid adding, water, oil, mud can be separately recovered by settle and separate or three phase separation.
Further, in the step (1), the concentration of the lipopeptid aqueous solution is 5-20g/L.
Further, in the step (1), the lipopeptid, which can be, to be also possible to by the sterling isolated and purified comprising more Fermentation liquid, the concentrate of kind lipopeptid mixture.
Further, in the step (1), whipping temp is 50-70 DEG C；Stirring can pass through mechanical agitator tank, stirring pool Etc. modes realize.
Further, in the step (2), the acid is hydrochloric acid, sulfuric acid, phosphoric acid, acetic acid etc..
Further, in the step (2), pH to 2-3 is adjusted.
The beneficial effects of the present invention are:
1, the present invention post-processes mud mixture as greasy filth cleaning agent, and with acid using lipopeptid, can be efficient Ground removes the oil in greasy filth, and removal rate is up to 90% or more, can also simply implement the high efficiente callback of oil.Lipopeptid is by microorganism The biosurfactant generated is secreted, there is complicated peptide cyclic group, it is difficult to by chemical synthesis, there is brilliant table/boundary Face activity, it is environmentally friendly, nontoxic, nonirritant, biodegradable.
2, the main component of the present invention using lipopeptid as greasy filth cleaning agent washs greasy filth, easy to operate, washing effect Rate is high；Washing process has that wash conditions are mild, save energy consumption, is environmentally protective, will not generate secondary pollution, at the same to environment and The advantages that human health is friendly.
Specific embodiment
Biosurfactant lipopeptid (surfactin, also known as Surfactin) is that one kind is metabolized by bacillus subtilis The biosurfactant of generation.What lipopeptid of the invention can be bacillus subtilis removes thallus fermentation liquid, is also possible to this The heavy concentrate of the acid of fermentation liquid, is also possible to the concentrate by extraction or the sterling of purifying.
Lipopeptid has efficient table/interfacial activity, and molecular weight is small, under stirring, can rapidly be adsorbed in greasy filth On surface, due to its own good wetability, oil can be got off from greasy filth surface desorption, and part forms lotion, efficiently Oil is removed from greasy filth.Further, since surfactin its surface-active easy to be lost under acidic environment (pH < 5), will lead to The rapid unstability of the lotion formed before makes in mud mixture after acid adding so that quick water-oil separating occur, mud, water, Oily three-phase quick separating, thus this three-phase can be separately recovered.Meanwhile after mud, water, oil separation, what is contacted with mud is free from oil Water, the oil mass of such mud absorption will be greatly reduced, to realize efficient greasy filth cleaning.In operation, lipopeptid is added Amount is more, is more conducive to the washing of greasy filth.
Below according to embodiment the present invention is described in detail, the objects and effects of the present invention will be more apparent.
Embodiment 1
The lipopeptid aqueous solution of 0.5,1,2,5,10,20g/L are configured, lipopeptid is the concentrate of bacillus subtilis fermentation liquor (content 30%).Greasy filth and lipopeptid aqueous solution are mixed according to the mass ratio of 1:2,50 degree of water-baths is placed in, is stirred under 1000rpm Then the H of 1M is added in 30min2SO4PH to 3 or so is adjusted, 0.5h is stood under 50 degree, water, oil, mud three-phase is separately recovered, is surveyed Determine oil content in mud, calculates the removal rate of oil.Moisture content is about 0.5-1.5% in the oily phase of recycling, substantially meets wanting for reuse It asks.If it is desired to which moisture content is lower than 0.5%, can be handled again by disc centrifuge.Oily removal rate may be up to 90% in mud phase More than, as shown in the table.In addition, after oil-sludge treatment, hardly oil-containing in water phase illustrates that the oil removed from greasy filth floats on completely Layer waterborne, the i.e. oily rate of recovery are consistent with removal rate oily in greasy filth.Should the result shows that, the method for the present invention can efficiently remove oil Oil in mud, while realizing oily mutually recycling.
Lipopeptid dosage (g/L) Oily phase removal rate (%)
0.5 45.7
1 78.6
2 92.1
5 94.5
10 97.7
20 97.3
Embodiment 2
The lipopeptid aqueous solution of 1g/L is configured, lipopeptid is the concentrate (content 30%) of bacillus subtilis fermentation liquor.It will Greasy filth and lipopeptid aqueous solution are mixed according to different mass ratioes, are placed in 50 degree of water-baths, are stirred 30min under 1000rpm, be then added The H of 1M2SO4PH to 3 or so is adjusted, stands 0.5h under 50 degree, water, oil, mud three-phase is separately recovered, measures oil content in mud, meter Calculate the removal rate of oil.Method of the invention can efficiently remove the oil in greasy filth, while realize oily mutually recycling.
Greasy filth: water ratio Oily 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
The lipopeptid aqueous solution of 1g/L is configured, lipopeptid is respectively sterling (by column chromatographic isolation and purification), fermentation liquid (10g/ L), it is acidified concentrate (content 30%), extraction concentrate (content 80%).By greasy filth and lipopeptid aqueous solution according to 1:3's Mass ratio mixing, is placed in 50 degree of water-baths, stirs 30min under 1000rpm, and the H of 1M is then added2SO4PH to 3 or so is adjusted, 50 Degree is lower to stand 0.5h, and water, oil, mud three-phase is separately recovered, measures oil content in mud, calculates the removal rate of oil.The result shows that above-mentioned The lipopeptid of separate sources can remove the oil in greasy filth well.
Lipopeptid type Oily phase removal rate (%)
Lipopeptid sterling 94.9
Fermentation liquid 93.5
It is acidified concentrate 93.3
Extract concentrate 95.2
Embodiment 4
Take the 4 batch greasy filth in actual production process, comprising: tank bottom oil sludge, ground sludge, oily sludge, In oil content at 5-15% (v/v).Above-mentioned greasy filth is washed using the lipopeptid aqueous solution of 1g/L.Concrete operations are as follows: greasy filth-water Mass ratio is 1:3, is placed in 90 degree of water-baths, stirs 60min under 1000rpm, and the H of 1M is then added2SO4Adjust pH to 3 or so, In 50 degree of lower standing 0.5h, are separately recovered water, oil, mud three-phase, measure oil content in mud, calculate the removal rate of oil.The result shows that: needle It to the oil-sludge treatment of 4 batches, can be achieved efficiently to remove the oil in greasy filth, removal efficiency height to 95%, oily residual in greasy filth Amount is lower than 1%, can be used for filling or paving the way, well solves the processing problem of greasy filth.
Comparative example 1
The lipopeptid aqueous solution of 1g/L is configured, lipopeptid is the concentrate (content 30%) of bacillus subtilis fermentation liquor, is matched Set 60 solution of SDS, SDBS and Tween of 1g/L.Greasy filth and aqueous surfactant solution, pure water are mixed according to the mass ratio of 1:3 It closes, is placed in 50 degree of water-baths, stirs 30min under 1000rpm, the H of 1M is then added2SO4PH to 3 or so is adjusted, is stood under 50 degree 0.5h.The result shows that solution is quickly divided into oil, water, mud three-phase, and the oily phase residual rate in mud is lower, and oily goes after lipopeptid washing Except rate is up to 95%.And after chemical surfactant washing, cloudy state is presented in solution, and has part mud is outstanding to be mixed in aqueous solution In, it is difficult to it is layered, need to be separated by the mode Jiang Shui and mud of centrifugation, it is even more important that remaining oil content is higher in mud, oil Removal rate be only 35-48%, the substantially less than washing effect of biosurfactant lipopeptid.
Detergent Oily phase removal rate (%)
Water 10.2
Lipopeptid 95.1
SDS 43.2
SDBS 36.5
Tween 60 48.8
Comparative example 2
The lipopeptid aqueous solution of 1g/L is configured, lipopeptid is the concentrate (content 30%) of bacillus subtilis fermentation liquor.It will Greasy filth and lipopeptid aqueous solution are mixed according to the mass ratio of 1:3, are placed in 50 degree of water-baths, are stirred 30min under 1000rpm, be then added The H of 1M2SO4It is adjusted to different pH.0.5h is stood under 50 degree, water, oil, mud three-phase is separately recovered, measures oil content in mud, Calculate the removal rate of oil.In addition, also recycling to oil supernatant on water, the rate of recovery of oil is calculated.The result shows that: after washing For acid adding to pH less than 5, oily removal rate is consistent with the rate of recovery, this is because hardly oil-containing in water phase.Without acid adding processing, though It so removes the oil in greasy filth with also can dramatically, but there is a small amount of oil to be emulsified in water phase, so that the rate of recovery of oil is slightly lower.It can See, lipopeptid can realize the washing of greasy filth well.
pH Oily phase removal rate (%) Oil recovery rate (%)
7.6 (not acid addings) 86.5 71.2
5 93.6 93.2
3 94.9 94.9
2 95.7 95.7
The above, the only preferable examples of the invention patent are not intended to limit the protection model of the invention patent It encloses.In addition to the implementation, the present invention can also have other embodiments.All skills formed using equivalent replacement or equivalence changes Art scheme, falls within the scope of protection required by the present invention.

Claims (6)

1. a kind of oil-sludge treatment method, which comprises the following steps:
(1) into greasy filth to be processed be added lipopeptid aqueous solution, and room temperature to 90 DEG C at a temperature of stirring 0.5h or more mixed It closes；Wherein mass ratio > 1 of lipopeptid aqueous solution and greasy filth, the concentration of lipopeptid aqueous solution are 0.5-20g/L.
(2) acid for adjusting pH is added in mixed mud mixture in step (1) to 2-6.
(3) after acid adding, water, oil, mud can be separately recovered by settle and separate or three phase separation.
2. oil-sludge treatment method according to claim 1, which is characterized in that in the step (1), the lipopeptid aqueous solution Concentration be 5-20g/L.
3. oil-sludge treatment method according to claim 1, which is characterized in that in the step (1), the lipopeptid be can be It is also possible to fermentation liquid, concentrate comprising a variety of lipopeptid mixtures by the sterling isolated and purified.
4. oil-sludge treatment method according to claim 1, which is characterized in that in the step (1), whipping temp 50- 70℃；Stirring can be realized by modes such as mechanical agitator tank, stirring pools.
5. oil-sludge treatment method according to claim 1, which is characterized in that in the step (2), the acid be hydrochloric acid, Sulfuric acid, phosphoric acid, acetic acid etc..
6. oil-sludge treatment method according to claim 1, which is characterized in that in the step (2), preferably adjusting pH to 2- 3。
CN201910837193.9A 2019-09-05 2019-09-05 A kind of oil-sludge treatment method Pending CN110526548A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112537895A (en) * 2020-11-18 2021-03-23 盘锦宁泰能源科技有限公司 Preparation and application method of oily sludge biological treatment agent

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104876405A (en) * 2015-04-21 2015-09-02 南开大学 Method for cleaning aged oil sludge
CN105753283A (en) * 2016-03-14 2016-07-13 北京华纳斯科技有限公司 Method of utilizing biosurfactant and microbial agent to treat oil-containing sediment
CN107937020A (en) * 2017-11-24 2018-04-20 南京理工大学 A kind of efficient breaking method of the two-step method of lipopeptid

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104876405A (en) * 2015-04-21 2015-09-02 南开大学 Method for cleaning aged oil sludge
CN105753283A (en) * 2016-03-14 2016-07-13 北京华纳斯科技有限公司 Method of utilizing biosurfactant and microbial agent to treat oil-containing sediment
CN107937020A (en) * 2017-11-24 2018-04-20 南京理工大学 A kind of efficient breaking method of the two-step method of lipopeptid

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112537895A (en) * 2020-11-18 2021-03-23 盘锦宁泰能源科技有限公司 Preparation and application method of oily sludge biological treatment agent

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