CN102826622A - Treatment method of wastewater containing rubber latex - Google Patents
Treatment method of wastewater containing rubber latex Download PDFInfo
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- CN102826622A CN102826622A CN201110168697XA CN201110168697A CN102826622A CN 102826622 A CN102826622 A CN 102826622A CN 201110168697X A CN201110168697X A CN 201110168697XA CN 201110168697 A CN201110168697 A CN 201110168697A CN 102826622 A CN102826622 A CN 102826622A
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Abstract
The invention provides a treatment method of wastewater containing rubber latex. The method comprises a step that the wastewater is frozen and is then thawed. With the method provided by the invention, emulsion breaking can be effectively realized out upon the rubber-latex-containing wastewater with relatively low rubber latex content. With the method, solid substances in opalescent wastewater can be flocculated, water quality can be clarified, and wastewater can be decolorized. Therefore, subsequent wastewater treatment can easily be carried out upon the clarified liquid. No agent is adopted according to the invention, such that no secondary pollution is caused. Therefore, the method is environment-friendly.
Description
Technical field
The present invention relates to a kind of wastewater treatment method that contains rubber latex.
Background technology
Cold method is used for sea water desaltination the earliest to be handled, and just is used for wastewater treatment recently decades.Cold method is to be theoretical basis with the solid, liquid principle that balances each other between the ice and the aqueous solution; Utilize the zero pour physical property of the zero pour of impurity in the waste water, under coldcondition, water is wherein at first separated out with solid-phase crystallization far below water; And impurity is left in the liquid phase; Through separating the solid, liquid phase, melted ice crystal can obtain more purified water and the liquid concentrator that contains impurity.The approach difference that forms by ice crystal can be divided into natural freezing method and artificial cold method.
Natural freezing method promptly utilizes natural cold-energy that waste water is frozen, thereby obtains comparatively purified glacial epoch liquid concentrator, to reach the purpose of purifying liquid waste.By the end of at present, the cold method that successfully natural cold-energy is used for WWT is atomizing crystallization freezing method, or claims the snowization method.This method is a kind of sewage treatment process by the exploitation of Canadian Delta company; This technology with the nozzle ejection of waste water through particular design in cold environment; Make waste water in freezing air, partly be frozen into snowflake or ice rapidly; In the process that becomes ice or Cheng Xue, impurity is foreclosed, and waste water is purified.At present, cold method has practical application in trade effluent fields such as paper mill, pharmaceutical factory.But this technology of cold method can not be handled the suspension-s system that is steady state, and this is because the suspended particle in the water is a solid matter, is water-fast.
In the prior art, the method for breakdown of emulsion generally has three kinds, that is, and and physics method, biological process and chemical method.Wherein, physics breakdown of emulsion method comprises filtration, centrifugal, ultrasonic, air supporting etc.The size of the rubber particles in the latex suspension is the 20-200 nanometer, can handle with membrane filtration technique theoretically, but fenestra is less, and easy blocking, and clean difficulty.And method such as centrifugal, ultrasonic, air supporting all can not realize this creaming of emulsion.The biological demulsifying method originates from the seventies in last century, is to utilize mikrobe milk sap to be carried out the method for breakdown of emulsion.The mikrobe breakdown of emulsion is meant and utilizes microorganism cells itself or its metabolic process, meta-bolites to realize emulsion breakdown that known several thalline are better to the demulsification of oil field milk sap at present.The biological demulsifying method can not introduced secondary pollution, is a kind of eco-friendly breaking method, but still is in conceptual phase at present.The chemical method breakdown of emulsion is through in emulsion system, adding chemical substance, change the type and the interfacial property of milk sap, making this system become unstable and the generation breakdown of emulsion.At present, the effective means of chemical demulsification is the tensio-active agent breakdown of emulsion, the tensio-active agent breakdown of emulsion in the crude oil field research and use more.
The content of rubber latex is lower in the waste water that in the process of the processing of rubber latex and use, produces, and is creamy white.The waste water of breakdown of emulsion is not difficult to decolouring, and more difficulty reaches emission standard.In addition; Because the tensio-active agent that different types of rubber latex is adopted in the preparation process also is not quite similar, therefore, existing AS in the said waste water; Nonionogenic tenside is arranged again; Part latex also contains cats product, and therefore, it is difficult more that breakdown of emulsion just becomes.Breaking method to this waste water also rarely has report both at home and abroad.
Summary of the invention
The objective of the invention is to overcome the method that is difficult to adopt prior art the waste water that contains rubber latex is carried out the problem of breakdown of emulsion, a kind of wastewater treatment method that is easy to make the waste water breakdown of emulsion that contains rubber latex is provided.
The present invention provides a kind of wastewater treatment method that contains rubber latex, wherein, this method comprise with said waste water carry out freezing after, thaw again.
Method provided by the invention can effectively realize the lower waste water that contains rubber latex of rubber latex content is carried out breakdown of emulsion; Make solid matter flocculation in the waste water that is creamy white, it is clear that water quality becomes, and makes waste water decoloring; Thereby help clear liquid is carried out follow-up wastewater treatment; And do not use any medicament in the present invention, can not introduce secondary pollution, environmentally friendly.
Embodiment
The present invention provides a kind of wastewater treatment method that contains rubber latex, wherein, this method comprise with said waste water carry out freezing after, thaw again.
For the lower waste water of the content of the rubber latex that is difficult to especially handle; Latex particle is a kind of water-fast solid matter; Can not reach isolating purpose according to the difference of zero pour; And latex particle very dispersion in water, thereby be difficult to utilize emulsion splitter destruction to contain the suspension system of latex particle, and obtain clear liquid.Contriver of the present invention finds; According to method of the present invention with said waste water carry out freezing after; Can be easy to make milky waste water to become clear after thawing again; The solid phase flocculation makes waste water decoloring in the waste water, carries out the purpose that simple solid-liquid separation can realize removing the latex that contains in the waste water after thawing.Infer that reason possibly be: pollutent mainly is a rubber in the waste water; Its second-order transition temperature is more much lower than the temperature of solidification of water; This species diversity causes when low temperature, having between phase and phase separating to be inclined to; Final homophase material aggregation, thus reach the effect of breakdown of emulsion, and the solid-state waste water behind the breakdown of emulsion can not come back to emulsified state along with thawing.
The treatment in accordance with the present invention method is carried out said waste water freezing, can adopt variety of way in cryogenic environment, to carry out said waste water freezing.For example can carry out freezing in the freezer etc. at the freezing case.
The treatment in accordance with the present invention method is carried out the refrigerated condition with said waste water and need be satisfied and make said waste water become solid from liquid.Under the common situation, said refrigerated condition comprises refrigerated temperature and refrigerated time.
In the present invention, said refrigerated temperature can be selected in very wide scope.Generally speaking, said refrigerated temperature is less than 0 ℃; Consider that from the effect and the efficient of breakdown of emulsion preferred said refrigerated temperature is-10 ℃～-80 ℃; More preferably said refrigerated temperature is-40 ℃～-60 ℃.
In the present invention, the said refrigerated time can be selected in very wide scope.Generally speaking, the said refrigerated time was greater than 15 hours; Consider that from the effect and the efficient of breakdown of emulsion preferred said refrigerated temperature is 20-200 hour; More preferably said refrigerated temperature is 72-120 hour.
The treatment in accordance with the present invention method, with said waste water carry out freezing after, thaw again.The process of thawing is to solidify attitude to get back to liquid state.In the present invention, in freezing and the process of thawing, the state of system is irreversible, that is, waste water can be along with thawing and getting back to emulsified state behind freezing breakdown of emulsion.
The mode of thawing in the present invention, can be thawed for thawing naturally or heating.Said thawing naturally is meant at room temperature and thaws.Said heating is thawed and is thawed under the condition that is meant outside heating.Quilt is preferred because the cost that thaws naturally is low.
In the present invention, above-mentioned heating is thawed and can be carried out for method well known in the art.For example can thaw containing in the heat-conducting medium that waste water container after freezing is positioned over certain temperature.The temperature of said heat-conducting medium does not have special requirement, as long as can thaw.Generally speaking, as long as the temperature of said heat-conducting medium is preferably 60-100 ℃ greater than 40 ℃.
The treatment in accordance with the present invention method has no particular limits the temperature of the liquid after thawing.Under the preferred situation, the temperature of the liquid after thawing can be preferably 15-40 ℃ for greater than 10 ℃.
The treatment in accordance with the present invention method; This method also comprises the step of the liquid that obtains after thawing being carried out solid-liquid separation; The liquid phase that obtains can be proceeded conventional follow-up wastewater treatment, can be used as solid waste disposal after the solid phase that obtains (being the rubber latex mainly or all) dehydration.The method of said solid-liquid separation can adopt conventional the whole bag of tricks, method such as for example filters, centrifugal.
Method provided by the invention can be used for handling the various waste water that contain rubber latex, and it is lower to be specially adapted in the waste water content of rubber latex, is difficult to the waste water handled like 0.5-3 weight %.
To further describe in detail the present invention through specific embodiment below.
The chemical oxygen demand of waste water adopts the mensuration dichromate titration of GB/T 11914-89 hydrochemistry oxygen requirement to carry out in following examples.
Embodiment 1
Present embodiment is used for explaining the wastewater treatment method of rubber latex production generation.
Measure 1000ml waste water and (derive from powdered rubber workshop, Beijing Chemical Research Institute; Wherein rubber latex content is 3 weight %; The chemical oxygen demand cod of waste water is 16356.4mg/L), put into-10 ℃ of refrigerated tanks freezing 168 hours, take out the nature after-filtration that thaws; Gained filtrating is clarified liq, and its COD value is 351.6mg/L.
Embodiment 2
Present embodiment is used for explaining the wastewater treatment method of rubber latex production generation.
Measure 1000ml waste water and (derive from powdered rubber workshop, Beijing Chemical Research Institute; Wherein rubber latex content is 2.5 weight %; The chemical oxygen demand cod of waste water is 14337.0mg/L), put into-70 ℃ of refrigerated tanks freezing 24 hours, take out the nature after-filtration that thaws; Gained filtrating is clarified liq, and its COD value is 312.4mg/L.
Embodiment 3
Present embodiment is used for explaining the wastewater treatment method of rubber latex production generation.
Measure 1000ml waste water and (derive from powdered rubber workshop, Beijing Chemical Research Institute; Wherein rubber latex content is 0.5 weight %; The chemical oxygen demand cod of waste water is 2981.8mg/L), put into-40 ℃ of refrigerated tanks freezing 72 hours, take out the nature after-filtration that thaws; Gained filtrating is clarified liq, and its COD value is 325.7mg/L.
Embodiment 4
Present embodiment is used for explaining the wastewater treatment method of rubber latex production generation.
Measure 1000ml waste water and (derive from powdered rubber workshop, Beijing Chemical Research Institute; Wherein rubber latex content is 2 weight %; The chemical oxygen demand cod of waste water is 10763.4mg/L), put into-40 ℃ of refrigerated tanks freezing 120 hours, take out the nature after-filtration that thaws; Gained filtrating is clarified liq, and its COD value is 313.1mg/L.
Embodiment 5
Present embodiment is used for explaining the wastewater treatment method of rubber latex production generation.
Measure 1000ml waste water and (derive from powdered rubber workshop, Beijing Chemical Research Institute; Wherein rubber latex content is 1 weight %; The chemical oxygen demand cod of waste water is 5748.2mg/L), put into-60 ℃ of refrigerated tanks freezing 72 hours, take out the nature after-filtration that thaws; Gained filtrating is clarified liq, and its COD value is 289.3mg/L.
Embodiment 6
Present embodiment is used for explaining the wastewater treatment method of rubber latex production generation.
Measure 1000ml waste water and (derive from powdered rubber workshop, Beijing Chemical Research Institute; Wherein rubber latex content is 3 weight %; The chemical oxygen demand cod of waste water is 16356.4mg/L), put into-60 ℃ of refrigerated tanks freezing 120 hours, after-filtration thaws under 80 ℃ after taking out; Gained filtrating is clarified liq, and its COD value is 243.5mg/L.
To obtain transparent clear liquid after the processing that embodiment 1-6 is obtained and be transported to sewage work, and send the refuse tip to handle as solid waste flocs unit dehydration back.
In addition, can find out significantly that the COD value that obtains transparent clear liquid after treatment is obviously much lower than the COD value of the waste water before handling from embodiment 1-6.
Claims (8)
1. a wastewater treatment method that contains rubber latex is characterized in that, this method comprise with said waste water carry out freezing after, thaw again.
2. treatment process according to claim 1, wherein, said waste water is carried out the refrigerated condition comprise: freezing temp is that the refrigerated time was greater than 15 hours less than 0 ℃.
3. treatment process according to claim 2, wherein, said waste water is carried out the refrigerated condition comprise: freezing temp is-10 ℃～-80 ℃, the refrigerated time is 20-200 hour.
4. treatment process according to claim 3, wherein, said waste water is carried out the refrigerated condition comprise: freezing temp is-40 ℃～-60 ℃, the refrigerated time is 72-120 hour.
5. treatment process according to claim 1, wherein, said thawing for thawing naturally.
6. treatment process according to claim 1, wherein, said thawing thawed for heating, and the temperature after thawing is greater than 10 ℃.
7. treatment process according to claim 1, wherein, this method also comprises carries out solid-liquid separation with the liquid that obtains after thawing.
8. treatment process according to claim 1, wherein, the content of rubber latex is 0.5-3 weight % in the said waste water.
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| CN201110168697XA CN102826622A (en) | 2011-06-17 | 2011-06-17 | Treatment method of wastewater containing rubber latex |
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| CN201110168697XA CN102826622A (en) | 2011-06-17 | 2011-06-17 | Treatment method of wastewater containing rubber latex |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103043838A (en) * | 2012-12-26 | 2013-04-17 | 大连春兴科技股份有限公司 | Freezing and thawing treatment method for suspended wastewater |
| CN105217708A (en) * | 2015-10-28 | 2016-01-06 | 湖北华巳新能源环保工程有限公司 | A kind of cryogenic freezing Sewage treatment systems |
| CN108410689A (en) * | 2018-01-09 | 2018-08-17 | 中国科学院微生物研究所 | The recovery method of biological sample and the composition used in microlayer model |
| CN112919705A (en) * | 2021-01-28 | 2021-06-08 | 江苏泰斗环保工程科技有限公司 | Method for purifying emulsion polymerization resin wastewater |
| CN112919704A (en) * | 2021-01-26 | 2021-06-08 | 江苏泰斗环保工程科技有限公司 | Green treatment method of emulsion polymerization resin wastewater |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN108410689A (en) * | 2018-01-09 | 2018-08-17 | 中国科学院微生物研究所 | The recovery method of biological sample and the composition used in microlayer model |
| CN108410689B (en) * | 2018-01-09 | 2020-07-03 | 中国科学院微生物研究所 | Method for recovering biological sample in microdroplet and composition used |
| CN112919704A (en) * | 2021-01-26 | 2021-06-08 | 江苏泰斗环保工程科技有限公司 | Green treatment method of emulsion polymerization resin wastewater |
| CN112919705A (en) * | 2021-01-28 | 2021-06-08 | 江苏泰斗环保工程科技有限公司 | Method for purifying emulsion polymerization resin wastewater |
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Application publication date: 20121219 |