CN109231630A - The recovery method of surfactant in a kind of waste water - Google Patents
The recovery method of surfactant in a kind of waste water Download PDFInfo
- Publication number
- CN109231630A CN109231630A CN201811282879.8A CN201811282879A CN109231630A CN 109231630 A CN109231630 A CN 109231630A CN 201811282879 A CN201811282879 A CN 201811282879A CN 109231630 A CN109231630 A CN 109231630A
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- Prior art keywords
- surfactant
- waste water
- recovery method
- filtrate
- level
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Classifications
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/301—Detergents, surfactants
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The present invention provides a kind of recovery methods of surfactant in waste water, waste water is filtered first with strainer twice, eliminate the suspended matter in waste water, the hydrogen and oxygen generated by electrolysis method electrolysis water takes the residual little particle in filtrate out of, it is finally concentrated using reverse osmosis membrane, most of water is distilled off, the surfactant of high concentration is obtained, easy to operate, the rate of recovery of surfactant is high.
Description
Technical field
The present invention relates to technical field of surfactant, and in particular to the recovery method of surfactant in a kind of waste water.
Background technique
Surfactant is referred to as " industrial monosodium glutamate ", suffers from and is widely applied in every field.Due to surface-active
The dosage of agent is big, and part factory is directly discharged in river, and the surfactant being discharged into river is easy to produce foam, isolation
Oxygen exchange between water body and air causes water body smelly.It is existing in order to eliminate environmental problem caused by surfactant discharge
Mainly utilizing the surfactant in membrane technology recycling waste water.But recovering effect is simultaneously unsatisfactory, and recycling obtains
Surfactant impurity is more, is difficult to recycle.
Summary of the invention
In view of the above problems, the present invention provides a kind of recovery method of surfactant in waste water, easy to operate, surface is living
Property agent the rate of recovery it is high.
To achieve the above object, the present invention solves by the following technical programs:
The recovery method of surfactant in a kind of waste water, comprising the following steps:
S1 is once filtered the waste water containing surfactant, removes the suspended matter in waste water, until turbidity is less than in water
2.5~4NTU obtains level-one filtrate；
Flocculant is added into level-one filtrate by S2, stands 10 minutes after mixing evenly, then carries out secondary filter, removes cotton-shaped
Object, until turbidity obtains second level filtrate less than 2~3NTU in water；
It is 7.5~8.5 that S3, which is added alkaline conditioner and adjusts the ph value of second level filtrate,；
Second level filtrate is transferred in electrolytic cell by S4, and electrolytic cell both ends are passed through 9~12V voltage, controlled at 70~80 DEG C, electricity
20~25min is solved, clarified solution is obtained；
The temperature of clarified solution is reduced to 5~8 DEG C by S5, and then clarified solution is pumped into reverse osmosis unit and is concentrated, and is obtained dense
The mass ratio of contracting liquid, concentrate and clarified solution is 5~15:100；
Concentrate is carried out distillation procedure by S6, obtains surfactant, and the mass ratio of surfactant and concentrate is 80~95:
100。
Specifically, once being filtered in the step S1 using 80~100 mesh filter screens.
Specifically, carrying out secondary filter using 300~400 mesh filter screens in the step S2.
Specifically, flocculant is inorganic flocculating agent in the step S2.
Specifically, inorganic flocculating agent is one of aluminum sulfate, aluminium chloride, ferric sulfate, iron chloride in the step S2.
Specifically, the step S3 neutral and alkali regulator is sodium hydroxide, in potassium hydroxide, sodium bicarbonate, triethanolamine
One kind.
Specifically, the operation temperature of the reverse osmosis unit is 5~8 DEG C, pressure is 4~5MPa.
The beneficial effects of the present invention are:
The recovery method of surfactant in waste water provided by the invention, is filtered waste water first with strainer twice, removes
Suspended matter in waste water, the hydrogen and oxygen generated by electrolysis method electrolysis water take the residual little particle in filtrate out of, most
It is concentrated afterwards using reverse osmosis membrane, most of water is distilled off, obtain the surfactant of high concentration, easy to operate, surface-active
The rate of recovery of agent is high.
Specific embodiment
In order to further appreciate that feature of the invention, technological means and specific purposes achieved, function, tie below
Closing specific embodiment, the present invention is described in further detail.
Embodiment 1
The recovery method of surfactant in a kind of waste water, comprising the following steps:
S1 takes a small amount of waste water as sample, and water, oils, surfactant, salt, bulky grain suspended matter, little particle are contained in waste water
Object etc. is once filtered the waste water containing surfactant using 100 mesh filter screens, and the bulky grain removed in waste water suspends
Object obtains level-one filtrate until turbidity is less than 4NTU in water；
Aluminum sulfate is added into level-one filtrate by S2, stands 10 minutes after mixing evenly, the little particle in flocculant and level-one filtrate
Substance forms floccule, then carries out secondary filter using 400 mesh filter screens, removes floccule, until turbidity is less than 3NTU in water,
Obtain second level filtrate；
It is 8 that S3, which is added sodium hydroxide and adjusts the ph value of second level filtrate, makes second level filtrate made alkaline；
Second level filtrate is transferred in electrolytic cell by S4, and electrolytic cell both ends are passed through 9V voltage, controlled at 80 DEG C, is electrolysed 25min,
When electrolysis, hydrogen is generated on cathode plate, and oxygen, hydrogen and oxygen are generated on anode plate by the residual little particle band in second level filtrate
Out, meanwhile, under alkalinity, hot conditions, the oils in second level filtrate is changed into fatty acid compound, fatty acid compound
For one of surfactant, clarified solution is obtained；
S5 makes water be easier to separate with surfactant, by clarified solution to reduce the solubility of surfactant in water
Temperature is reduced to 6 DEG C, and then clarified solution is pumped into reverse osmosis unit and is concentrated, and has reverse osmosis membrane in reverse osmosis unit,
Using the pressure difference at reverse osmosis membrane both ends as motive force, pressure is applied to the clarified solution of reverse osmosis membrane side, when pressure is more than it
When osmotic pressure, surfactant can make inverse osmosis against the direction of naturally osmotic, thus isolate surface from clarified solution and live
Property agent.The operation temperature of reverse osmosis unit is 6 DEG C, pressure 4MPa, obtains concentrate, and the mass ratio of concentrate and clarified solution is
10:100；
Concentrate is carried out distillation procedure by S6, obtains surfactant, and the mass ratio of surfactant and concentrate is 90:100.
Embodiment 2
The recovery method of surfactant in a kind of waste water, comprising the following steps:
S1 takes a small amount of waste water as sample, and water, oils, surfactant, salt, bulky grain suspended matter, little particle are contained in waste water
Object etc. is once filtered the waste water containing surfactant using 80 mesh filter screens, removes the bulky grain suspended matter in waste water,
Until turbidity is less than 4NTU in water, level-one filtrate is obtained；
Aluminum sulfate is added into level-one filtrate by S2, stands 10 minutes after mixing evenly, the little particle in flocculant and level-one filtrate
Substance forms floccule, then carries out secondary filter using 300 mesh filter screens, removes floccule, until turbidity is less than 3NTU in water,
Obtain second level filtrate；
It is 7.8 that S3, which is added sodium hydroxide and adjusts the ph value of second level filtrate, makes second level filtrate made alkaline；
Second level filtrate is transferred in electrolytic cell by S4, and electrolytic cell both ends are passed through 10V voltage, controlled at 80 DEG C, electrolysis
25min when electrolysis, generates hydrogen on cathode plate, oxygen, hydrogen and oxygen is generated on anode plate the residual in second level filtrate is small
Particle is taken out of, meanwhile, under alkalinity, hot conditions, the oils in second level filtrate is changed into fatty acid compound, fatty acid
Compound is one of surfactant, obtains clarified solution；
S5 makes water be easier to separate with surfactant, by clarified solution to reduce the solubility of surfactant in water
Temperature is reduced to 5 DEG C, and then clarified solution is pumped into reverse osmosis unit and is concentrated, and has reverse osmosis membrane in reverse osmosis unit,
Using the pressure difference at reverse osmosis membrane both ends as motive force, pressure is applied to the clarified solution of reverse osmosis membrane side, when pressure is more than it
When osmotic pressure, surfactant can make inverse osmosis against the direction of naturally osmotic, thus isolate surface from clarified solution and live
Property agent.The operation temperature of reverse osmosis unit is 5 DEG C, pressure 4MPa, obtains concentrate, and the mass ratio of concentrate and clarified solution is
12:100；
Concentrate is carried out distillation procedure by S6, obtains surfactant, and the mass ratio of surfactant and concentrate is 80:100.
2 kinds of embodiments of the invention above described embodiment only expresses, the description thereof is more specific and detailed, but not
Limitations on the scope of the patent of the present invention therefore can be interpreted as.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (7)
1. the recovery method of surfactant in a kind of waste water, which comprises the following steps:
S1 is once filtered the waste water containing surfactant, removes the suspended matter in waste water, until turbidity is less than in water
2.5~4NTU obtains level-one filtrate；
Flocculant is added into level-one filtrate by S2, stands 10 minutes after mixing evenly, then carries out secondary filter, removes cotton-shaped
Object, until turbidity obtains second level filtrate less than 2~3NTU in water；
It is 7.5~8.5 that S3, which is added alkaline conditioner and adjusts the ph value of second level filtrate,；
Second level filtrate is transferred in electrolytic cell by S4, and electrolytic cell both ends are passed through 9~12V voltage, controlled at 70~80 DEG C, electricity
20~25min is solved, clarified solution is obtained；
The temperature of clarified solution is reduced to 5~8 DEG C by S5, and then clarified solution is pumped into reverse osmosis unit and is concentrated, and is obtained dense
The mass ratio of contracting liquid, concentrate and clarified solution is 5~15:100；
Concentrate is carried out distillation procedure by S6, obtains surfactant, and the mass ratio of surfactant and concentrate is 80~95:
100。
2. the recovery method of surfactant in a kind of waste water according to claim 1, which is characterized in that the step S1
It is middle once to be filtered using 80~100 mesh filter screens.
3. the recovery method of surfactant in a kind of waste water according to claim 1, which is characterized in that the step S2
It is middle to carry out secondary filter using 300~400 mesh filter screens.
4. the recovery method of surfactant in a kind of waste water according to claim 1, which is characterized in that the step S2
Middle flocculant is inorganic flocculating agent.
5. the recovery method of surfactant in a kind of waste water according to claim 4, which is characterized in that the step S2
Middle inorganic flocculating agent is one of aluminum sulfate, aluminium chloride, ferric sulfate, iron chloride.
6. the recovery method of surfactant in a kind of waste water according to claim 1, which is characterized in that the step S3
Neutral and alkali regulator is one of sodium hydroxide, potassium hydroxide, sodium bicarbonate, triethanolamine.
7. the recovery method of surfactant in a kind of waste water according to claim 1, which is characterized in that described reverse osmosis
The operation temperature of device is 5~8 DEG C, and pressure is 4~5MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811282879.8A CN109231630A (en) | 2018-10-31 | 2018-10-31 | The recovery method of surfactant in a kind of waste water |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811282879.8A CN109231630A (en) | 2018-10-31 | 2018-10-31 | The recovery method of surfactant in a kind of waste water |
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| Publication Number | Publication Date |
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| CN109231630A true CN109231630A (en) | 2019-01-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811282879.8A Pending CN109231630A (en) | 2018-10-31 | 2018-10-31 | The recovery method of surfactant in a kind of waste water |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113105049A (en) * | 2021-03-24 | 2021-07-13 | 广东丽臣奥威实业有限公司 | Treatment method of sewage containing high-foam surfactant |
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2018
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| CN1565984A (en) * | 2003-07-07 | 2005-01-19 | 中国科学院生态环境研究中心 | Electrochemical method and device for continuous and fast water treatment |
| CN201793449U (en) * | 2010-09-15 | 2011-04-13 | 卓剑锋 | Combined electrolysis equipment for treating emulsified oil wastewater |
| CN103523883A (en) * | 2013-11-06 | 2014-01-22 | 纳爱斯集团有限公司 | Pretreatment method in purification process of fresh water or saponification wastewater |
| CN108069553A (en) * | 2016-11-10 | 2018-05-25 | 苏州凯世工贸有限公司 | A kind of heavy oil dirt cleaning machine environmental protection water treatment system and its processing method |
Non-Patent Citations (4)
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| 刘双进编著: "《污水处理新技术 反渗透和超滤》", 31 March 1985, 海洋出版社 * |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113105049A (en) * | 2021-03-24 | 2021-07-13 | 广东丽臣奥威实业有限公司 | Treatment method of sewage containing high-foam surfactant |
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Application publication date: 20190118 |