CN1884119A - Process for treating high-concentration dyeing waste water - Google Patents
Process for treating high-concentration dyeing waste water Download PDFInfo
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- CN1884119A CN1884119A CN 200610088171 CN200610088171A CN1884119A CN 1884119 A CN1884119 A CN 1884119A CN 200610088171 CN200610088171 CN 200610088171 CN 200610088171 A CN200610088171 A CN 200610088171A CN 1884119 A CN1884119 A CN 1884119A
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Abstract
The invention discloses a disposing method of high-density printing and dyeing waste water, which comprises the following steps: (1) removing impurity in the dye waste water through retainer; sending the waste water in the coagulation basin; (2) flowing (or stirring) to add magnetofluid at 320mg/L; flocculating; (3) flowing through magnetic sedimenting pool for 2-5 min to finish sedimenting; (4) overflowing supernatant; filtering sedimentation; pressing. The invention can finish disposal within 10 min, which removes CODCr by 75-80 percent, SS by over 80 percent and chromaticity by over 95 percent in once disposal course.
Description
Technical field
The present invention relates to the novel method that a kind of high-concentration printing and dyeing wastewater is handled.
Background technology
Textile industry is one of traditional mainstay industry of China, and the developing history in existing century more than one is one of industry with the longest history in China's national industry.China is first big country of textile printing and dyeing, yet textile printing and dyeing industry is again the rich and influential family of industrial wastewater discharge, accounts for 35% of whole discharged volume of industrial waste water.According to incompletely statistics, China's dyeing waste water quantity discharged is about 3 * 106～4 * 106m3 every day, printing and dyeing mill's every processing 100m fabric can produce 3～5t waste water, ecological damage that causes thus and financial loss are immeasurable, thereby to realize the Sustainable development of dyeing, the pollution problem that must at first solve dyeing.
The dyestuff that is comprised in the dyeing waste water mainly contains hydrophilic substantive dyestuff, matching stain, reactive dyestuffs and hydrophobic vat dyes, thioxine dyes, dispersed dye etc.These dye species are various, complex structure, cause dyeing waste water to contain multiplely to have the organism that bio-toxicity or three causes performance, and also have collaborative enhanced effect between the organism.Along with China's development of science and technology, material (comprising various fibers, dyestuff and the auxiliary agent) kind that dyeing uses is increasing, what have replaces original natural matter with chemical feedstocks, the difficulty of treatment of dyeing wastewater is increased greatly, the biodegradability that is in particular in this waste water is very poor, the employing traditional technology is handled, and COD and colourity are difficult to reach emission standard.Especially decolorization of dyeing is one of subject matter of wastewater treatment.
The characteristics of dyeing waste water:
(1) wastewater flow rate is big, generally can reach 70%～90% of dyeing waste water producer water consumption;
(2) its component complexity mainly is to be parent with aromatic hydrocarbons and heterogeneous ring compound, and has colour developing and polar group; Contain in the dye molecule than multipotency and water molecules form hydrogen bond etc. hydrophilic radical, as reactive dyestuffs and neutral dye etc., dye molecule just can be dissolved in the waste water entirely; Do not contain or contain less the dye molecule of hydrophilic radical, be present in the waste water with hydrophobic suspended particulates form; Contain a small amount of hydrophilic radical but molecular weight is very big or do not contain the dye molecule of hydrophilic radical fully, in water, often exist, also often have some dyeing auxiliarys in the dyeing waste water with colloidal form.Thereby color is dark, dirty, becomes sticking waste water;
(3) (COD) is higher for chroma in waste water height, chemical oxygen demand (COD), and biochemical oxygen demand (BOD) (BOD) is less relatively, and biodegradability is poor.High-concentration printing and dyeing wastewater general pH value is 6～10, and COD is 400～1480mg/L, and BoD is 100～400mg/L, and SS is 100～200mg/L, and colourity is 100～400 times.
(4) alkalescence is big, can reach more than 10 as thioxine dyes and vat dyes waste water ph;
(5) the water temperature water yield changes greatly, and the variation owing to processing variety, output can cause the bigger variation of the water temperature water yield, and dyeing waste water water quality with the difference of starting material, production kind, production technique, level of management difference to some extent;
(6) discharge of wastewater has intermittence.
In recent years, treatment of dyeing wastewater research is rather active, concludes and to get up to mainly contain absorption (air supporting) method, membrane separation technique, the sound wave gas treatment processs such as technology, chemical coagulation process, redox, ion-exchange, ultrafiltration, biochemistry and electrochemistry of shaking.At the different quality of dyeing waste water, often adopt different treatment process.
General industrial organic waste water all can suitably be handled by the combination traditional technology at present, but organic waste water for poisonous bio-refractory, as the processing of dyeing waste water, the effective countermeasured to bring inflation under control owing to technology and economic dispatch reason still lack economic so far.Some separation methods that now come into operation, as air-blowing, coagulation, absorption, filtration etc., have advantages such as simple, the easy and simple to handle and technical maturity of equipment, but this class treatment process is normally transferred to solid phase (as charcoal absorption and chemical coagulation etc.) or gas phase (air-blowing) with organism in the waste water from liquid phase, not only do not eliminate organic pollutant fully and consume a large amount of chemical agents, and cause refuse to pile up and secondary pollution.Although biological treatment has been widely used in the processing of sanitary sewage and trade effluent, drawback such as exist to sacrifice Macrodilution water and the treatment time is long, occupation area of equipment is big.Therefore, the novel wastewater processing technology of the low and non-secondary pollution of research and development expense has become important topic that needs to be resolved hurrily in the environmental protection field.
Discovered in recent years that the treatment process that really has the industrial applications potentiality should be the combination of aforesaid method, gave full play to its advantage separately, treatment effect is increased substantially.Although study morely at present both at home and abroad in this respect, multiple treatment technology is proposed, the processing efficiency that has in actual applications is not high, and the technology that has is too complicated, even the generation secondary pollution that has, and does not reach the purpose of comprehensively purifying waste water.
Summary of the invention
The objective of the invention is: a kind of process for treating high-concentration dyeing waste water is provided, in view of at present traditional disposal methods operation various, and the practical situation that treatment effect is general, the application new function material that proposes---characteristic magnetic fluid comes a kind of new technological treatment that dyeing waste water is handled, and the experimental study display effect is good.
Technical scheme of the present invention is: the novel method that a kind of high-concentration printing and dyeing wastewater is handled comprises the following steps:
(1) dyeing waste water is removed impurity through barrier, sends into coagulation basin;
(2) flow in (or in stirring) add magnetic fluid by 320mg/L, the reaction flocculation;
(3) the magnetic field settling bowl of flowing through, 2-5 minute, sedimentation was complete;
(4) clear liquid overflow, sediment filters, press filtration is taken out.
Described treating processes can be finished within 10min; And high-concentration printing and dyeing wastewater is through primary treatment COD
CrClearance is 75～80%, and the SS clearance is more than 80%, and colourity is generally more than 95%.
Advantage of the present invention is:
Treating processes of the present invention can be finished within 10min, and high-concentration printing and dyeing wastewater is through primary treatment COD
CrClearance is 75～80%, and the SS clearance is more than 80%, and colourity is generally more than 95%.
The invention will be further described below in conjunction with embodiment:
Embodiment
Embodiment: the novel method that a kind of high-concentration printing and dyeing wastewater is handled comprises the following steps:
(1) dyeing waste water is removed impurity through barrier, sends into coagulation basin;
(2) add magnetic fluid by 320mg/L, the reaction flocculation in flowing;
(3) the magnetic field settling bowl of flowing through, 2-5 minute, sedimentation was complete;
(4) clear liquid overflow, sediment filters, press filtration is taken out.
The entire treatment process can be finished within 10min, and high-concentration printing and dyeing wastewater is through primary treatment COD
CrClearance is 75～80%, and the SS clearance is more than 80%, and colourity is generally more than 95%.
Magnetic fluid (Magnetic Fluid) has ferromagnetic material with some, as iron (Fe), cobalt (Co) and Z 250 (Fe
3O
4) the surface parcel layer of surface promoting agent of the ultrafine particulate that waits, and high dispersing is in carrier fluid (organic or inorganic solvent) and the stable colloidal solutions that forms is a kind of new function material.Because its ultrafine particulate has small-size effect, surface effects, magnetic effect, characteristics such as quantum effect, so magnetic fluid is different from traditional magneticsubstance, both had solid magnetic, have the flowability of liquid again, often show unique physicochemical property: promptly magnetic fluid has suspending power under the action of a magnetic field adding, and has good rheologic behavio(u)r and tribological property; Regulate externally-applied magnetic field intensity, can change the apparent density of magnetic fluid; Under the control of externally-applied magnetic field, can locate exactly, directed and mobile etc.
Magnetic fluid is a kind of the ferromagnetism ultramicron to be distributed to resulting highly stable colloidal solution in the liquid.The sixties in last century, American S.S.Papell has obtained first magnetic fluid and has prepared patent, and in the nineteen sixty-five application of in the sealing of US Airways and space agency's space product, succeeing, thereby caused the research and development of people to this new function material.No matter magnetic fluid is on engineering is used, and on biomedical applications, all is the material that has much incentive still.Magnetic fluid is gradually improved in the utilisation technology of aspects such as sealing, lubricated, grinding, generating.At present, held once international magnetic fluid conference in per in the world 3 years, the performance and the new Application Areas of exploitation of magnetic fluid inquired in the experts and scholars of each side joint research.
Claims (3)
1. the novel method that high-concentration printing and dyeing wastewater is handled comprises the following steps:
(1) dyeing waste water is removed impurity through barrier, sends into coagulation basin;
(2) add magnetic fluid by 320mg/L, the reaction flocculation in flowing;
(3) the magnetic field settling bowl of flowing through, 2-5 minute, sedimentation was complete;
(4) clear liquid overflow, sediment filters, press filtration is taken out.
2. the novel method that high-concentration printing and dyeing wastewater according to claim 1 is handled, it is characterized in that: described treating processes can be finished within 10min.
3. the novel method that high-concentration printing and dyeing wastewater according to claim 1 is handled, it is characterized in that: high-concentration printing and dyeing wastewater is through primary treatment COD
CrClearance is 75～80%, and the SS clearance is more than 80%, and colourity is generally more than 95%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610088171 CN1884119A (en) | 2006-06-28 | 2006-06-28 | Process for treating high-concentration dyeing waste water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610088171 CN1884119A (en) | 2006-06-28 | 2006-06-28 | Process for treating high-concentration dyeing waste water |
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| CN1884119A true CN1884119A (en) | 2006-12-27 |
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| CN 200610088171 Pending CN1884119A (en) | 2006-06-28 | 2006-06-28 | Process for treating high-concentration dyeing waste water |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101913685A (en) * | 2010-08-05 | 2010-12-15 | 安徽雷克环保科技有限公司 | Novel magnetic separation sewage treatment unit |
| CN101759255B (en) * | 2009-09-22 | 2011-11-02 | 淄博兰雁集团有限责任公司 | Energy-efficient magnetofluid automated sewage purification device and process |
| CN102417251A (en) * | 2011-10-14 | 2012-04-18 | 韩小满 | Treating and recycling system for textile sewage |
| CN109292931A (en) * | 2018-11-05 | 2019-02-01 | 黑河学院 | A kind of solar battery preparation discharge of wastewater processing unit |
-
2006
- 2006-06-28 CN CN 200610088171 patent/CN1884119A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101759255B (en) * | 2009-09-22 | 2011-11-02 | 淄博兰雁集团有限责任公司 | Energy-efficient magnetofluid automated sewage purification device and process |
| CN101913685A (en) * | 2010-08-05 | 2010-12-15 | 安徽雷克环保科技有限公司 | Novel magnetic separation sewage treatment unit |
| CN101913685B (en) * | 2010-08-05 | 2012-06-27 | 安徽雷克环保科技有限公司 | Novel magnetic separation sewage treatment unit |
| CN102417251A (en) * | 2011-10-14 | 2012-04-18 | 韩小满 | Treating and recycling system for textile sewage |
| CN109292931A (en) * | 2018-11-05 | 2019-02-01 | 黑河学院 | A kind of solar battery preparation discharge of wastewater processing unit |
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