CN102976536A - Method for treating dyeing waste water of disperse reactive dyes - Google Patents
Method for treating dyeing waste water of disperse reactive dyes Download PDFInfo
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- CN102976536A CN102976536A CN2012105390419A CN201210539041A CN102976536A CN 102976536 A CN102976536 A CN 102976536A CN 2012105390419 A CN2012105390419 A CN 2012105390419A CN 201210539041 A CN201210539041 A CN 201210539041A CN 102976536 A CN102976536 A CN 102976536A
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Abstract
The invention discloses a method for treating dyeing waste water of disperse reactive dyes, which comprises the following steps: regulating the pH value, adding decolorizing coagulant, precipitating, and then introducing into an air floatation device; regulating the pH value, adding ferrous ions and H2O2, flowing through an asbestos gauge coated with nano level titanium dioxide, and performing ultraviolet irradiation; and finally, regulating the pH value of effluent water, thus achieving the purpose of discharging dyeing waste water meeting standards. According to the invention, a photocatalytic technology is introduced, thereby effectively avoiding secondary pollution and achieving the effects of energy saving and environment friendliness; and the used decolorizing coagulant is a mixture comprising 40-80% of polyaluminum chloride, 5-10% of polyacrylamide and 20-40% of magnesium sulfate in percentage by mass. Through using the method provided by the invention to treat dyed waste water, the COD (chemical oxygen demand), BOD (biochemical oxygen demand) and chroma removal rate of dyeing waste water can be up to 98% or above.
Description
Technical field
The invention discloses a kind of techniques of Dyeing Wastewater Treatment, relate in particular to a kind of dispersed activity dye printing and dyeing wastewater treatment process.
Background technology
The dyeing waste water complicated component, color is dark, and quantity discharged is large, is one of domestic and international reluctant trade effluent always.The material resources that cost a lot of money of people and financial resources are to solve this difficult problem for this reason.Mainly contain biochemical process in the treatment process of existing processing dyeing and printing sewage, electrolytic process, and photocatalytic method.The biochemical process floor space is large, and narrow application range, effect are also undesirable; Although the electrolytic process effect is better than biochemical process, energy consumption is large, Difficulty.Photochemical catalysis be owing to can make the organism permineralization, do not have secondary pollution and gets most of the attention.
Patent CN1428301 discloses a kind of water conditioner, and this treatment agent contains chloric acid class and salt and water-soluble aluminum salt, when processing waste water, suspended substance and colloidal particle in the flocculation water, reduce COD thereby reach, the effect of BOD and colourity reaches the function of deodorizing simultaneously.Therewith similar patent also have a lot, CN85104351A for example, CN1063469QA etc.With the flocculation agent treatment of dyeing and printing, still produce effect for the precipitation suspended substance, and for reducing COD, the effect of BOD and colourity is unsatisfactory, particularly deodorizing effect is poorer, can bring in addition secondary pollution, fundamentally the contaminated solution problem.
Summary of the invention
The present invention is directed to the problem that exists in the background technology, proposed a kind of energy-saving and environment friendly, efficiently the dispersed activity dye printing and dyeing wastewater treatment process for the treatment of of dyeing and printing.
Technical scheme of the present invention is: a kind for the treatment of step of dispersed activity dye printing and dyeing wastewater treatment process is:
(1) regulating pH with dilute hydrochloric acid is 8.5～9.5, adds the agent of 100～300mg/L decoloration coagulant and carries out the decolorization flocculation processing;
(2) air-floating apparatus is introduced in water outlet after the precipitation, and colloidal solid material small in the waste water is climbed up on top of the water;
(3) regulate waste water ph to 3.0～4.0 with acid again, add the ferrous ion of 2～5ppm and the H of 5～10ppm
2O
2, flow through the asbestos gauge that is coated with Nano titanium dioxide, and with UV-irradiation 30～60min;
(4) water outlet is 6.5～7.5 with alkali adjusting pH value, can discharge.
Described decoloration coagulant agent is to be 40～80% polymerize aluminum chloride by mass ratio, the mixture that 5～10% polyacrylamide and 20～40% sal epsom form.
Described asbestos gauge is the asbestos gauge that the surface is coated with the macromolecular material layers such as corrosion-resistant finishes or tetrafluoroethylene, and its maximum mesh is not more than 10 millimeters, outer plated with photocatalysis agent titanic oxide material.
The present invention is to the COD of dyeing waste water, and the clearance of BOD and colourity all is not less than 98%.
Beneficial effect of the present invention:
1, present device is simple, and operation possibility is strong, is easy to promote;
2, the present invention has introduced photocatalysis technology, energy clean environment firendly.Catalyzer can reuse simultaneously, has avoided secondary pollution, realizes energy-conserving and environment-protective;
3, the present invention has not only realized the efficient utilization to light source, has accelerated simultaneously dispersion rate, has greatly improved waste water treatment efficiency;
4, effect of the present invention is splendid, and not only to the COD of dyeing waste water, the clearance of BOD and colourity all is not less than 98%, but also has the effect of deodorization and sterilization, achieves many things at one stroke.
Embodiment
Example 1
Regulating pH with dilute hydrochloric acid is 8.5, adds the agent of 100mg/L decoloration coagulant and carries out decolorization flocculation and process, the polymerize aluminum chloride of 40mg/L wherein, the polyacrylamide of 20mg/L and the sal epsom of 40mg/L; Air-floating apparatus is introduced in water outlet after the precipitation, and colloidal solid material small in the waste water is climbed up on top of the water; Regulate waste water ph to 3.0 with acid again, add the ferrous ion of 2ppm and the H of 5ppm
2O
2, flow through the asbestos gauge that is coated with Nano titanium dioxide, and use UV-irradiation 30min; It is 6.5 that water outlet is regulated the pH value with alkali, the COD of waste water, and the clearance of BOD and colourity reaches 98%, meets discharge standard.
Example 2
Regulating pH with dilute hydrochloric acid is 9.0, adds the agent of 200mg/L decoloration coagulant and carries out decolorization flocculation and process, the polymerize aluminum chloride of 35mg/L wherein, the polyacrylamide of 15mg/L and the sal epsom of 50mg/L; Air-floating apparatus is introduced in water outlet after the precipitation, and colloidal solid material small in the waste water is climbed up on top of the water; Regulate waste water ph to 3.5 with acid again, add the ferrous ion of 3ppm and the H of 8ppm
2O
2, flow through the asbestos gauge that is coated with Nano titanium dioxide, and use UV-irradiation 45min; It is 7.0 that water outlet is regulated the pH value with alkali, the COD of waste water, and the clearance of BOD and colourity reaches 99%, meets discharge standard.
Example 3
Regulating pH with dilute hydrochloric acid is 9.5, adds the agent of 300mg/L decoloration coagulant and carries out decolorization flocculation and process, the polymerize aluminum chloride of 30mg/L wherein, the polyacrylamide of 10mg/L and the sal epsom of 60mg/L; Air-floating apparatus is introduced in water outlet after the precipitation, and colloidal solid material small in the waste water is climbed up on top of the water; Regulate waste water ph to 4.0 with acid again, add the ferrous ion of 5ppm and the H of 10ppm
2O
2, flow through the asbestos gauge that is coated with Nano titanium dioxide, and use UV-irradiation 60min; It is 7.5 that water outlet is regulated the pH value with alkali, the COD of waste water, and the clearance of BOD and colourity reaches 99.8%, meets discharge standard.
Claims (3)
1. dispersed activity dye printing and dyeing wastewater treatment process, it is characterized in that: the treatment step of described method is:
(1) regulating pH with dilute hydrochloric acid is 8.5～9.5, adds the agent of 100～300mg/L decoloration coagulant and carries out the decolorization flocculation processing;
(2) air-floating apparatus is introduced in water outlet after the precipitation, and colloidal solid material small in the waste water is climbed up on top of the water;
(3) regulate waste water ph to 3.0～4.0 with acid again, add the ferrous ion of 2～5ppm and the H2O2 of 5～10ppm, flow through the asbestos gauge that is coated with Nano titanium dioxide, and with UV-irradiation 30～60min;
(4) water outlet is 6.5～7.5 with alkali adjusting pH value, can discharge.
2. described a kind of dispersed activity dye printing and dyeing wastewater treatment process according to claim 1, it is characterized in that: described decoloration coagulant agent is to be 40～80% polymerize aluminum chloride by mass ratio, the mixture that 5～10% polyacrylamide and 20～40% sal epsom form.
3. described a kind of dispersed activity dye printing and dyeing wastewater treatment process according to claim 1, it is characterized in that: described asbestos gauge is the asbestos gauge that the surface is coated with the macromolecular material layers such as corrosion-resistant finishes or tetrafluoroethylene, its maximum mesh is not more than 10 millimeters, outer plated with photocatalysis agent titanic oxide material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105390419A CN102976536A (en) | 2012-12-11 | 2012-12-11 | Method for treating dyeing waste water of disperse reactive dyes |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012105390419A CN102976536A (en) | 2012-12-11 | 2012-12-11 | Method for treating dyeing waste water of disperse reactive dyes |
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| CN102976536A true CN102976536A (en) | 2013-03-20 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106045105A (en) * | 2016-06-27 | 2016-10-26 | 深圳市翰唐环保科技有限公司 | Dyeing wastewater treatment technique |
| CN108503103A (en) * | 2018-04-18 | 2018-09-07 | 常德力元新材料有限责任公司 | The method for handling waste water |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1760142A (en) * | 2004-10-15 | 2006-04-19 | 福建凤竹纺织科技股份有限公司 | Method for treating dyeing wastewater thorugh filtering coagulated gas float, and one-piece type handling arrangement |
| CN1978337A (en) * | 2005-12-01 | 2007-06-13 | 曹健 | Printing-dyeing waste water treatment process |
| CN102160988A (en) * | 2011-03-04 | 2011-08-24 | 常州大学 | Method for preparing dyeing wastewater treatment material |
-
2012
- 2012-12-11 CN CN2012105390419A patent/CN102976536A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1760142A (en) * | 2004-10-15 | 2006-04-19 | 福建凤竹纺织科技股份有限公司 | Method for treating dyeing wastewater thorugh filtering coagulated gas float, and one-piece type handling arrangement |
| CN1978337A (en) * | 2005-12-01 | 2007-06-13 | 曹健 | Printing-dyeing waste water treatment process |
| CN102160988A (en) * | 2011-03-04 | 2011-08-24 | 常州大学 | Method for preparing dyeing wastewater treatment material |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106045105A (en) * | 2016-06-27 | 2016-10-26 | 深圳市翰唐环保科技有限公司 | Dyeing wastewater treatment technique |
| CN108503103A (en) * | 2018-04-18 | 2018-09-07 | 常德力元新材料有限责任公司 | The method for handling waste water |
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Application publication date: 20130320 |