CN101279787A - Method for reclaiming anionic surface-active agent in waste water - Google Patents
Method for reclaiming anionic surface-active agent in waste water Download PDFInfo
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- CN101279787A CN101279787A CNA2008100666657A CN200810066665A CN101279787A CN 101279787 A CN101279787 A CN 101279787A CN A2008100666657 A CNA2008100666657 A CN A2008100666657A CN 200810066665 A CN200810066665 A CN 200810066665A CN 101279787 A CN101279787 A CN 101279787A
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- waste water
- calcium chloride
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- chloride solution
- anion surfactant
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Abstract
The invention relates to a method for recovering negative ion surface active agent in waste water, which comprises the following steps of: (1) dissolving a calcium chloride in water to prepare a calcium chloride solution; (2) mixing the calcium chloride solution with waste water or foam liquid containing negative ion surface active agent fully to generate solid precipitate after reaction; (3) solid-liquid separation; and (4) drying the solid precipitate. In order to improve the recovery efficiency, the calcium chloride solution is a saturation calcium chloride solution; the concentration of negative ion surface active agent in the waste water or foam liquid is larger than 500mg/L; and the negative ion surface active agent is a sodium dodecyl benzene sulfonate. The method reduces the treatment cost of waste water, saves energy and reduces drainage for enterprises in a real sense, and has a profound influence on the industrial application of recovering the negative ion surface active agent in waste water. The method also has the positive significance to the environmental protection.
Description
Technical field
The present invention relates to reclaim the method for anion surfactant in the waste water.
Background technology
China's detergent industry development in recent years is rapid, and its output increases year by year.China's synthetic detergent output was 5,100,000 tons in 2005, and 2006 is 5,500,000 tons, reached 6,000,000 tons in 2007, was expected to be 6,500,000 tons in 2008.China uses many tensio-active agents at present has: anion surfactant (based on linear alkylbenzene sulphonic acid LAS) accounts for 70% of total amount; Nonionogenic tenside accounts for 20% of total amount; Other account for 10%.Synthetic detergent is of many uses, almost relates to all respects of family life, industrial and agricultural production.
National according to incompletely statistics annual washing composition total emission volumn is more than 1,500,000 tons, the linear alkylbenzene sulphonic acid LAS of recyclable utilization is also more than 1,000,000 tons, wherein have most the linear alkylbenzene sulphonic acid LAS waste water that contains of recovery value to be mainly each big washing composition manufacturing enterprise, its year LAS discharging scale is also more than the hundreds of thousands of ton.So huge resource not only fails well to recycle the creation of value, will spend huge processing costs on the contrary and carry out harmless treatment, thereby enterprise's production cost increase be can't bear the heavy load, and the row of stealing puts steathily, so that cause serious environmental to pollute.
LAS belongs to the bio-refractory material, and being extensive use of of it pollutes water surrounding inevitably, in China's environmental standard it classified as the second pollutant matter.Tensio-active agent is used the final most of emulsifying collid shape material that forms in back along with waste water enters nature, after its primary pollutant LAS enters water body, be combined together to form colloidal solid with other pollutents, materialization, the biochemical characteristic of trade effluent and sanitary sewage all had a significant impact with certain dispersiveness.Anion surfactant has the effect of inhibition and kill microorganisms, but also suppress the degraded of other toxic substances, tensio-active agent bubbles in water and reduces reoxygenation speed and oxygenation degree in the water simultaneously, water quality is degenerated, if the not treated water body that directly enters will further aggravate the eutrophication of water bodys such as lake, river; LAS can also the emulsification water body in other pollution substance, increase the concentration of pollution substance, improve the toxicity of other pollution substances, and cause indirect pollution.LAS in the waste water itself has certain toxicity, and animals and plants and human body are had chronic toxic action, and LAS can cause that also oxygen transfer rate reduces in the water, and self purification of water body is obstructed.In addition, the foam of waste water generation also can influence environmental health and attractive in appearance.
At present to the processing of LAS waste water except original materialization and biochemical process, also have novel methods such as membrane sepn, little electrolysis and catalyzed oxidation, and obtained certain application.But the correlation technique of tensio-active agent LAS in the recovery waste water being carried out recycling there is no report.
Treatment technology to LAS in the waste water is divided into two classes:
1. " nondestructive " technology, promptly partition method comprises coagulation partition method, foamet, membrane separation process, absorption method;
2. " destructiveness " technology, promptly the oxygenolysis method comprises catalytic oxidation, micro-electrolysis method, biological oxidation process.
Be that " nondestructive " technology or " destructiveness " technology are all comparatively ripe, also have removal effect preferably, but all can't effectively recycle tensio-active agent LAS resource.
Tensio-active agent LAS is the resource with important recovery value, when carrying out actual treatment for tensio-active agent LAS waste water, should the high density LAS waste water that manufacturer directly discharges be recycled from recycling and two kinds of approach considerations of exhaustive oxidation decomposition; The waste water lower to the LAS content of other industry or dual disposal, recovery value is little, then uses and removes oxidative treatment more completely, to reduce secondary pollution.At present on industrial application to the processing of tensio-active agent LAS waste water based on foamet and biological oxidation process, the problem of outlet that foamet is resolved foam solution is the key of engineering of water treatment.The solution of success of the present invention foam solution handle a difficult problem, will form thus that a cover is efficient, the integrated coupling technique of economic, suitable China's national situation.
Therefore for the processing of tensio-active agent LAS waste water and recycling rationally, not only can save a large amount of resources, the operational cost that improves manufacturing enterprise improves the business economic benefit; simultaneously for resources conseravtion; keep ecological balance, promote economic development, all significant.
Summary of the invention
Problem solved by the invention is to overcome the deficiency that existing anionic surfactant treatment method exists, and a kind of anion surfactant in the waste water that can effectively reclaim is provided, and makes the method for its recycling.
In order to reach above purpose, the method for anion surfactant comprises the steps: in this recovery waste water provided by the invention
(1), calcium chloride is dissolved in the water is mixed with calcium chloride solution;
(2), with calcium chloride solution with contain the waste water of anion surfactant or through the isolating foam solution thorough mixing of foamet, the reaction back generates solid sediment;
(3), solid-liquid separation;
(4), solid sediment is dried.
Calcium chloride solution is saturated calcium chloride solution; Under normal temperature condition, the weight percent of calcium chloride solution concentration is that 10-37% is advisable usually.
Anionic surfactant concentration can improve organic efficiency like this greater than 500mg/L in waste water or the foam solution.
Anion surfactant is the Sodium dodecylbenzene sulfonate of using always.
Main achievement of the present invention adopts the chemical precipitation reaction principle exactly, utilizes a large amount of trade waste resources and cheap starting material to displace the resource product with high value.Bring better economic interests for anion surfactant LAS manufacturing enterprise, reduced cost for wastewater treatment, truly energy-saving and emission-reduction are accomplished by enterprise, have great promoter action; Will produce far-reaching influence to the industrial applications that anion surfactant LAS in the waste water reclaims.Environment protection also had positive meaning.And calcium dodecylbenzene sulphonate in farm chemical emulgent as the lipophilic surfactant component, and can be re-dubbed blended pesticide emulsifier with multiple nonionogenic tenside.
Embodiment
The present invention is described further below in conjunction with embodiment:
In order to raise the efficiency, require: 1, calcium chloride solution concentration wants big, will prepare saturated solution usually; 2, the anionic surfactant concentration in the waste water is not less than 500mg/L, also can adopt through the isolating foam solution of foamet, and the concentration of the anion surfactant of foam solution is usually above 500mg/L;
Embodiment 1
The recycling step of present embodiment is:
1, preparation calcium chloride solution.Calcium chloride is put in adds suitable water in the container and stir and be mixed with saturated calcium chloride solution, its concentration weight percent is 37%;
2, will contain anion surfactant waste water and calcium chloride solution thorough mixing, and have solid sediment to occur; The anion surfactant here is a Sodium dodecylbenzene sulfonate, and solid sediment is a calcium dodecylbenzene sulphonate.
3, solid-liquid separation;
4, the calcium dodecylbenzene sulphonate oven dry is got final product, can direct marketing be used to make other purposes such as agricultural chemicals.
Can learn that 1 kilogram of calcium chloride of every consumption will generate 3.1 kilograms of calcium dodecylbenzene sulphonates, remove in the waste water 3.1 kilograms Sodium dodecylbenzene sulfonate anion surfactant simultaneously.
Embodiment 2
Consider when the microthermal climate condition, the solubleness of calcium chloride is low, the calcium chloride solution concentration weight percent of present embodiment is 10%, reclaiming waste water has adopted through the isolating foam solution of foamet, other and a last embodiment are together, can reclaim anion surfactant wherein equally expeditiously, calcium dodecylbenzene sulphonate can be as the lipophilic surfactant component in farm chemical emulgent, and can be re-dubbed blended pesticide emulsifier with multiple nonionogenic tenside.
Claims (5)
1, a kind of method that reclaims anion surfactant in the waste water comprises the steps:
(1), calcium chloride is dissolved in the water is mixed with calcium chloride solution;
(2), with calcium chloride solution with contain the waste water of anion surfactant or through the isolating foam solution thorough mixing of foamet, the reaction back generates solid sediment;
(3), solid-liquid separation;
(4), solid sediment is dried.
2, the method for anion surfactant in the recovery waste water according to claim 1, it is characterized in that: described calcium chloride solution is saturated calcium chloride solution.
3, the method for anion surfactant in the recovery waste water according to claim 1, it is characterized in that: the weight percent of described calcium chloride solution concentration is 10-37%.
4, the method for anion surfactant in the recovery waste water according to claim 1, it is characterized in that: anionic surfactant concentration is greater than 500mg/L in described waste water or the foam solution.
5, according to the method for anion surfactant in each described recovery waste water in the above claim, it is characterized in that: described anion surfactant is a Sodium dodecylbenzene sulfonate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100666657A CN101279787A (en) | 2008-04-22 | 2008-04-22 | Method for reclaiming anionic surface-active agent in waste water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100666657A CN101279787A (en) | 2008-04-22 | 2008-04-22 | Method for reclaiming anionic surface-active agent in waste water |
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| CN101279787A true CN101279787A (en) | 2008-10-08 |
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| CNA2008100666657A Pending CN101279787A (en) | 2008-04-22 | 2008-04-22 | Method for reclaiming anionic surface-active agent in waste water |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2145535A1 (en) * | 2008-07-17 | 2010-01-20 | Erwin Sander Elektroapparatebau Gmbh | Method of clearing foam from collected foam in a foam remover and device therefore |
| CN101921031A (en) * | 2010-08-27 | 2010-12-22 | 北京工业大学 | Advanced treatment method for heavy alkylbenzene sulfonate (HABS) industrial wastewater |
| CN104831487A (en) * | 2015-05-15 | 2015-08-12 | 浙江映山红纺织科技有限公司 | Technology of dyeing wool yarn with reactive dye and dyeing equipment thereof |
| CN110938022A (en) * | 2019-11-04 | 2020-03-31 | 广东丽臣奥威实业有限公司 | Preparation method of improved sodium dodecyl benzene sulfonate solution |
| CN111763575A (en) * | 2020-06-19 | 2020-10-13 | 武汉工程大学 | Detergent composition not resistant to calcium and magnesium ions |
-
2008
- 2008-04-22 CN CNA2008100666657A patent/CN101279787A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2145535A1 (en) * | 2008-07-17 | 2010-01-20 | Erwin Sander Elektroapparatebau Gmbh | Method of clearing foam from collected foam in a foam remover and device therefore |
| CN101921031A (en) * | 2010-08-27 | 2010-12-22 | 北京工业大学 | Advanced treatment method for heavy alkylbenzene sulfonate (HABS) industrial wastewater |
| CN104831487A (en) * | 2015-05-15 | 2015-08-12 | 浙江映山红纺织科技有限公司 | Technology of dyeing wool yarn with reactive dye and dyeing equipment thereof |
| CN110938022A (en) * | 2019-11-04 | 2020-03-31 | 广东丽臣奥威实业有限公司 | Preparation method of improved sodium dodecyl benzene sulfonate solution |
| CN111763575A (en) * | 2020-06-19 | 2020-10-13 | 武汉工程大学 | Detergent composition not resistant to calcium and magnesium ions |
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Open date: 20081008 |