CN104355436A - Purifying method of industrial waste water - Google Patents
Purifying method of industrial waste water Download PDFInfo
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- CN104355436A CN104355436A CN201410555460.0A CN201410555460A CN104355436A CN 104355436 A CN104355436 A CN 104355436A CN 201410555460 A CN201410555460 A CN 201410555460A CN 104355436 A CN104355436 A CN 104355436A
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- waste water
- dyeing waste
- electroplating wastewater
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Abstract
The invention discloses a purification method of industrial waste water. The industrial waste water comprises electroplating waste water, printing and dyeing waste water and chemical organic waste water. The method comprises the following steps: mixing the electroplating waste water with the printing and dyeing waste water, removing solid particles, and adding metal positive ions; mixing the chemical organic waste water; dropping and adding hydrochloric acid or sulphuric acid to the mixed liquid obtained in the step (3), and regulating the pH to be 7. According to the invention, metal ions in the electroplating waste water are used, under an alkaline condition, hydrotalcite is generated, and the exchange characteristics of the anions of the hydrotalcite are used to adsorb the anions in the waste water to positions among layers. After anionic dye is adsorbed to the positions among the layers, an organic phase with distribution capacity is also formed, and other organic compounds in the mechanical waste water and the printing and dyeing waste water are all adsorbed to the positions among the layers of the hydrotalcite, the anions and other organic compounds are all precipitated to be separated from the water.
Description
Technical field
The present invention relates to water-treatment technology field, particularly a kind of industrial waste water purifying method.
Background technology
Along with rapid development of economy, industrial expansion is more and more huger rapidly, but the consequent is polluted exactly, and water pollutions is the hot topic that people talk about always.The waste water that industrial development brings mainly contains wastewater from chemical industry, dyeing waste water and electroplating wastewater.
Chemicals production process is aggravated the pollution of environment, also more prevalent and serious to the harm of human health, the organic substance of wherein particularly discharging in fine chemical product (as pharmacy, dyestuff, daily use chemicals etc.) production process is all the material that complex structure, poisonous and harmful and biology are difficult to degrade mostly.Therefore, the difficulty of chemical wastewater treatment is larger.The signature analysis of wastewater from chemical industry is as follows:
(1) water-quality constituents is complicated, and by product is many, and reaction raw materials is often the compound of solvent based material or ring texture, adds the intractability of waste water;
(2) Pollutants in Wastewater content is high, and this is because a large amount of solvent mediums of raw material reaction incomplete sum raw material or use in producing enter caused by waste water system;
(3) hazardous and noxious substances is many, has many organic pollutants to be poisonous and hazardous to microorganism, as halogen compounds, nitro-compound, the dispersion agent with germicidal action or tensio-active agent etc. in Fine Chemistry Wastewater;
(4) bio-refractory material is many, and B/C is than low, and biodegradability is poor;
5) chroma in waste water is high.Wastewater from chemical industry is the more unmanageable waste water of one.
Textile printing and dyeing wastewater has the features such as the water yield is large, organic pollutant content is high, alkalescence is large, change of water quality is large, belong to one of unmanageable trade effluent, containing dyestuff, slurry, auxiliary agent, finish, soda acid, fiber impurity, sand class material, inorganic salt etc. in waste water.The reactive dyestuffs that in dyeing process, consumption is maximum are exactly anionic dyestuff, and its amount existed in waste water is also maximum, and process is difficulty comparatively.The current treatment process having physico-chemical process, biochemical process, chemical method and several technique to combine for the main method for the treatment of of dyeing wastewater.But whole construction investment is large, and process cost is high.The waste water and waste liquids that electroplating facility is discharged, as plating piece rinse water, useless tank liquor, component cooling water and the flushing surface water etc., its water quality is different because of production technique, often oil-containing contents of many kinds of heavy metal ion.How poisonous electroplating wastewater is, endangers larger.Therefore, electroplating wastewater must strictly control, and deals carefully with.
At present, the electroplating effluent treatment method extensively adopted mainly contains 7 classes:
(1) chemical precipitation method, is divided into again moderate water-cut stage and sulphide precipitation;
(2) redox process, is divided into chemical reduction method, ferrite process and electrolytic process;
(3) solvent extraction and separation method;
(4) absorption method;
(5) membrane separation technique;
(6) ion exchange method;
(7) biologic treating technique, comprises bio-flocculation process, biosorption process, biochemical process, phytoremediation.Various method has respective relative merits, and the mishandling meeting of such as absorption method causes pollutent to shift, and biological process onset is slow, needs the several growth cycle of microorganism just can see effect.
The above wastewater from chemical industry, dyeing waste water and electroplating wastewater fecund is born in the manufacturing enterprise of the three types in the chemical industrial park in each city, as the manufacturing concern such as rubber, macromolecular material, and clothes, printing enterprise, plating and surface treatment processing enterprise etc.
Along with the needs of Economic development, exploitation quantity and the scale of the chemical industrial park in each city constantly increase, and how to control the emphasis that it is current concern on the impact that environment causes, and the waste water control of Craft in Chemical Industrial Area is exactly one of them important integral part.The process mainly separately process of current this kind of waste water, the characteristic for various waste water selects respective method to process respectively, and the present invention aims to provide a kind of technical scheme, and get up the Waste Water Centralized of described three types co-treatment.
Such as, application number is 201210496776.8, denomination of invention is a kind of process patent processing electroplating wastewater, provide the treatment process of electroplating wastewater, application number is 201310725074.7, denomination of invention is the treatment process that the patent of the treatment process of dyeing waste water provides a kind of dyeing waste water, and application number is 201310594311.0, and denomination of invention is that the patent of dyeing waste water scavenging agent provides a kind of dyeing waste water scavenging agent.
Summary of the invention
The technical problem to be solved in the present invention is for above-mentioned the deficiencies in the prior art, and provide a kind of can the method for simultaneously purifying electric waste electroplating, dyeing waste water and chemical industrial organic wastewater.
For solving the problems of the technologies described above, the technical solution used in the present invention is:
A kind of industrial waste water purifying method, described trade effluent comprises electroplating wastewater, dyeing waste water and chemical industrial organic wastewater, said method comprising the steps of:
The first step, removes the solid particulate in electroplating wastewater and dyeing waste water, adds metallic cation; Electroplating wastewater and dyeing waste water are filtered respectively, removes solid particulate; According to the ion that electroplate technology analysis wherein exists, add metallic cation or mixed by multiple electroplating wastewater, make bivalent ions volumetric molar concentration be 2 ~ 5 times of the volumetric molar concentration of trivalent ion;
Second step, mixed electroplating wastewater and dyeing waste water;
3rd step, adds chemical industrial organic wastewater, is fully uniformly mixed, carry out precipitate and separate in the mixed solution that second step obtains;
4th step, adjust pH.
In second step of the present invention, also to comprise: drip till mass percent is NaOH solution adjust ph to 8 ~ 12 of 10% ~ 50% in the mixed solution of electroplating wastewater and dyeing waste water, stir while dropping.
In second step of the present invention, stirring velocity is 300 ~ 500rpm, and churning time is 2 ~ 5 hours.
In second step of the present invention, also to comprise: drip till mass percent is the NaOH solution adjust ph to 10 of 30% in the mixed solution of electroplating wastewater and dyeing waste water, stir while dropping.
In the first step of the present invention, bivalent ions volumetric molar concentration is 3 times of the volumetric molar concentration of trivalent ion.
In second step of the present invention, by electroplating wastewater and dyeing waste water 3:1 ~ 5:1 mixing by volume.
In 3rd step of the present invention, in the mixed solution that second step obtains, add the chemical industrial organic wastewater that volume is dyeing waste water 2 ~ 5 times.
In 4th step of the present invention, the method for adjust pH is: in the mixed solution that the 3rd step obtains, drip hydrochloric acid or sulfuric acid, regulates pH to 7.
After the present invention adopts technique scheme, there is following technique effect:
(1) utilize the metal ion in electroplating wastewater can generate hydrotalcite in the basic conditions in the present invention, utilize the anion exchange properties of hydrotalcite that the negatively charged ion in waste water is all adsorbed onto interlayer.After anionic dyestuff is adsorbed to interlayer, define again the organic phase with distribution capability, other organism in wastewater from chemical industry and dyeing waste water are all adsorbed onto the interlayer of hydrotalcite, coprecipitation is separated from water.
(2) dyeing waste water add the generation that membership facilitates hydrotalcite, because the general alkalescence of dyeing waste water is comparatively strong, and pH is higher, can reduce the consumption preparing alkali (NaOH) in hydrotalcite process after adding dyeing waste water.
(3) load obtained by heavy metal has the hydrotalcite of dyestuff to form organic hydrotalcite, after process wastewater from chemical industry, according to the amount of its absorb polluted matter number, before not reaching capacity, also can be used as material for water treatment, continue on for organic waste water and administer.
Embodiment
For making the object of the embodiment of the present invention and technical scheme clearly, be clearly and completely described below in conjunction with the technical scheme of the invention process to the embodiment of the present invention.Obviously, described embodiment is a part of embodiment of the present invention, instead of whole embodiments.Based on described embodiments of the invention, the every other embodiment that those of ordinary skill in the art obtain under without the need to the prerequisite of creative work, all belongs to the scope of protection of the invention.
Electroplating wastewater and dyeing waste water are filtered removal solid particulate respectively, according to the ion that electroplate technology analysis wherein may exist, add suitable metallic cation, or multiple electroplating wastewater is mixed, ensure that bivalent ions volumetric molar concentration is 2 ~ 5 times of the volumetric molar concentration of trivalent ion.If only have divalent metal, then add a small amount of trivalent metal cation (as Al
3+, Fe
3+), if only have trivalent metal cation, then add a small amount of divalent metal (as Mg
2+, Fe
2+), if had divalent metal and trivalent metal cation, then investigate concentration, guaranteed that the concentration ratio of the two meets the scope that bivalent ions volumetric molar concentration is 2 ~ 5 times of the volumetric molar concentration of trivalent ion.
The mixing of electroplating wastewater and dyeing waste water; By electroplating wastewater and dyeing waste water 3:1 ~ 5:1 mixing by volume, drip till mass percent is NaOH solution adjust ph to 8 ~ 12 of 10% ~ 50% in the mixed solution of electroplating wastewater and dyeing waste water, drip while and stir, stirring velocity is 300 ~ 500rpm, and churning time is 2 ~ 5 hours.
In the mixed solution obtained above, add the chemical industrial organic wastewater that volume is dyeing waste water 2 ~ 5 times, be fully uniformly mixed, carry out precipitate and separate, and then drip hydrochloric acid or sulfuric acid in mixed solution, regulate pH to 7.
Utilize the metal ion in electroplating wastewater can generate hydrotalcite in the basic conditions, utilize the anion exchange properties of hydrotalcite that the negatively charged ion in waste water is all adsorbed onto interlayer.After anionic dyestuff is adsorbed to interlayer, define again the organic phase with distribution capability, other organism in wastewater from chemical industry and dyeing waste water are all adsorbed onto the interlayer of hydrotalcite, coprecipitation is separated from water.
Hydrotalcite, formal name used at school is layered di-hydroxyl composite metal oxidate (Layered Double Hydroxides, be called for short LDH), is the important inorganic functional material of a class.The adjustable sex change of the laminate structure of its uniqueness and laminate element and interlayer anion gets more and more people's extensive concerning, introducing new object negatively charged ion through ion-exchange to interlayer can make laminate structure and composition produce corresponding change, thus can prepare the functional materials that a large class has special property.Hydrotalcite material belongs to anion type laminated compound.Lamellar compound refer to there is laminate structure, a compounds that interlayer ion has interchangeability, some functional guest species are introduced bedding void and laminate distance are strutted thus form layer-pillared compound by the intercalation utilizing lamellar compound main body to have under strong polar molecule effect and the interchangeability of interlayer ion.
And dyeing waste water add the generation that membership facilitates hydrotalcite, because the general alkalescence of dyeing waste water is comparatively strong, and pH is higher, can reduce the consumption preparing alkali (NaOH) in hydrotalcite process after adding dyeing waste water.
The invention provides the preferred embodiment obtaining optimum in a kind of experimentation:
The first step, mixed electroplating wastewater and dyeing waste water, remove solid particulate, adds metallic cation; Electroplating wastewater and dyeing waste water are filtered respectively, removes solid particulate; According to the ion that electroplate technology analysis wherein exists, add metallic cation or mixed by multiple electroplating wastewater, make bivalent ions volumetric molar concentration be 3 times of the volumetric molar concentration of trivalent ion;
Second step, the mixing of electroplating wastewater and dyeing waste water; By the 3:1 mixing by volume of electroplating wastewater and dyeing waste water, drip till mass percent is the NaOH solution adjust ph to 10 of 30% in the mixed solution of electroplating wastewater and dyeing waste water, while dropping, stir 3 hours with 400rpm;
3rd step, mixing chemical industrial organic wastewater; In the mixed solution that second step obtains, add the chemical industrial organic wastewater that volume is dyeing waste water 3 times, be fully uniformly mixed, carry out precipitate and separate;
4th step, adjust pH; In the mixed solution that the 3rd step obtains, drip hydrochloric acid or sulfuric acid, regulate pH to 7.
Measure the composite waste supernatant liquor obtained through above step, in waste water, the clearance of metal ion is greater than 92%.
Those skilled in the art of the present technique are appreciated that unless otherwise defined, and all terms used herein (comprising technical term and scientific terminology) have the meaning identical with the general understanding of the those of ordinary skill in field belonging to the present invention.Should also be understood that those terms defined in such as general dictionary should be understood to have the meaning consistent with the meaning in the context of prior art, unless and define as here, can not explain by idealized or too formal implication.
The implication of the "and/or" described in the present invention refers to respective Individual existence or both simultaneous situations include interior.
With above-mentioned according to desirable embodiment of the present invention for enlightenment, by above-mentioned description, relevant staff in the scope not departing from this invention technological thought, can carry out various change and amendment completely.The technical scope of this invention is not limited to the content on specification sheets, must determine its technical scope according to right.
Claims (8)
1. an industrial waste water purifying method, is characterized in that: described trade effluent comprises electroplating wastewater, dyeing waste water and chemical industrial organic wastewater, said method comprising the steps of:
The first step, removes the solid particulate in electroplating wastewater and dyeing waste water, adds metallic cation; Electroplating wastewater and dyeing waste water are filtered respectively, removes solid particulate; According to the ion that electroplate technology analysis wherein exists, add metallic cation or mixed by multiple electroplating wastewater, make bivalent ions volumetric molar concentration be 2 ~ 5 times of the volumetric molar concentration of trivalent ion;
Second step, mixed electroplating wastewater and dyeing waste water;
3rd step, adds chemical industrial organic wastewater, is fully uniformly mixed, carry out precipitate and separate in the mixed solution that second step obtains;
4th step, adjust pH.
2. a kind of industrial waste water purifying method as claimed in claim 1, it is characterized in that, in described second step, also to comprise: drip till mass percent is NaOH solution adjust ph to 8 ~ 12 of 10% ~ 50% in the mixed solution of electroplating wastewater and dyeing waste water, stir while dropping.
3. a kind of industrial waste water purifying method as claimed in claim 2, is characterized in that, stirring velocity is 300 ~ 500rpm, and churning time is 2 ~ 5 hours.
4. a kind of industrial waste water purifying method as claimed in claim 1, it is characterized in that, in described second step, also to comprise: drip till mass percent is the NaOH solution adjust ph to 10 of 30% in the mixed solution of electroplating wastewater and dyeing waste water, stir while dropping.
5. a kind of industrial waste water purifying method as claimed in claim 4, is characterized in that, in the described the first step, bivalent ions volumetric molar concentration is 3 times of the volumetric molar concentration of trivalent ion.
6. a kind of industrial waste water purifying method as claimed in claim 1, is characterized in that, in described second step, by electroplating wastewater and dyeing waste water 3:1 ~ 5:1 mixing by volume.
7. a kind of industrial waste water purifying method as claimed in claim 1, is characterized in that, in described 3rd step, adds the chemical industrial organic wastewater that volume is dyeing waste water 2 ~ 5 times in the mixed solution that second step obtains.
8. a kind of industrial waste water purifying method as claimed in claim 1, is characterized in that, in described 4th step, the method for adjust pH is: in the mixed solution that the 3rd step obtains, drip hydrochloric acid or sulfuric acid, regulates pH to 7.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410555460.0A CN104355436A (en) | 2014-10-20 | 2014-10-20 | Purifying method of industrial waste water |
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| CN201410555460.0A CN104355436A (en) | 2014-10-20 | 2014-10-20 | Purifying method of industrial waste water |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106477757A (en) * | 2015-08-26 | 2017-03-08 | 盐城市瓯华化学工业有限公司 | A kind of method processing plating, printing and dyeing and chemical industrial organic wastewater |
| CN115716658A (en) * | 2022-08-23 | 2023-02-28 | 中冶赛迪工程技术股份有限公司 | Method for preparing magnesium-iron hydrotalcite by using metal ions in industrial wastewater |
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| CN1506315A (en) * | 2002-12-10 | 2004-06-23 | 合肥工业大学 | Prepn of laminated dihydrogen oxide and its derivative quasi-periclase |
| WO2004108608A1 (en) * | 2003-06-11 | 2004-12-16 | Seong Soo Hong | Method and apparatus for treating wastewater containing organic compound of high concentration |
| CN1569671A (en) * | 2003-07-24 | 2005-01-26 | 合肥工业大学 | Water treatment method for instant synthesis of laminated bis-hydroxide |
| CN101921013A (en) * | 2010-03-10 | 2010-12-22 | 田农 | Method for realizing reliable standard emission for electroplating wastewater by pure chemical precipitation method |
| CN102976518A (en) * | 2012-11-28 | 2013-03-20 | 常州大学 | Method for simultaneously purifying electroplating wastewater, printing and dyeing wastewater and chemical industrial organic wastewater |
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2014
- 2014-10-20 CN CN201410555460.0A patent/CN104355436A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1506315A (en) * | 2002-12-10 | 2004-06-23 | 合肥工业大学 | Prepn of laminated dihydrogen oxide and its derivative quasi-periclase |
| WO2004108608A1 (en) * | 2003-06-11 | 2004-12-16 | Seong Soo Hong | Method and apparatus for treating wastewater containing organic compound of high concentration |
| CN1569671A (en) * | 2003-07-24 | 2005-01-26 | 合肥工业大学 | Water treatment method for instant synthesis of laminated bis-hydroxide |
| CN101921013A (en) * | 2010-03-10 | 2010-12-22 | 田农 | Method for realizing reliable standard emission for electroplating wastewater by pure chemical precipitation method |
| CN102976518A (en) * | 2012-11-28 | 2013-03-20 | 常州大学 | Method for simultaneously purifying electroplating wastewater, printing and dyeing wastewater and chemical industrial organic wastewater |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106477757A (en) * | 2015-08-26 | 2017-03-08 | 盐城市瓯华化学工业有限公司 | A kind of method processing plating, printing and dyeing and chemical industrial organic wastewater |
| CN115716658A (en) * | 2022-08-23 | 2023-02-28 | 中冶赛迪工程技术股份有限公司 | Method for preparing magnesium-iron hydrotalcite by using metal ions in industrial wastewater |
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Application publication date: 20150218 |