CN101746905A - Method for treating printing and dyeing industrial waste water - Google Patents
Method for treating printing and dyeing industrial waste water Download PDFInfo
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- CN101746905A CN101746905A CN200810163445A CN200810163445A CN101746905A CN 101746905 A CN101746905 A CN 101746905A CN 200810163445 A CN200810163445 A CN 200810163445A CN 200810163445 A CN200810163445 A CN 200810163445A CN 101746905 A CN101746905 A CN 101746905A
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- waste water
- industrial waste
- printing
- dyeing industrial
- treatment process
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- Water Treatment By Electricity Or Magnetism (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
The invention relates to a method for treating printing and dyeing industrial waste water, belonging to the field of industrial waste water treatment. The traditional method for treating printing and dyeing industrial waste water has the defects of poor decolorizing effect and low COD removal rate. The method of the invention comprises PH value adjustment, flocculation and photooxidation, and has the advantages that the technology for treating printing and dyeing industrial waste water is simple, the decolorizing effect is good, the pollutant residue is less and the emission can reach the national emission standard.
Description
Technical field
The invention belongs to the technology for treating industrial waste water field, especially relevant with a kind of treatment process of printing and dyeing industrial waste water.
Background technology
Printing and dyeing industrial waste water organic pollutant content height, colourity are dark, and amount is big, present treatment process is mainly based on biochemical process, or be aided with chemical method, but the decolorizing effect of above-mentioned two kinds of methods is all undesirable, the clearance of COD (chemical oxygen demand (COD)) is lower, and the trade effluent after the processing also can't reach national specified discharge standard.
Summary of the invention
Purpose of the present invention is exactly the defective that decolorizing effect is poor, the COD clearance is lower that the existing printing and dyeing industrial waste water treatment process that will solve exists, and a kind of good decolorizing effect, printing and dyeing industrial waste water treatment process that the COD clearance is high are provided.For this reason, the present invention is by the following technical solutions:
A kind of treatment process of printing and dyeing industrial waste water may further comprise the steps: the first step is regulated pH value, according to the actual potential of hydrogen situation of waste water, adds acid in the waste water or alkali is regulated, and makes PH≤5.5 of waste water; Second step flocculated, and to adding trivalent iron salt and stir in the waste water of the first step processing, concentration reaches 600-1000 mg/litre waste water; The 3rd step was carried out photoxidation, will place under the UV-light irradiation half an hour to 5 hour through the waste water that second step handled.
As to such scheme replenish and perfect, the present invention also comprises following technical scheme:
Above-mentioned described trivalent iron salt of second step is an iron trichloride.
Above-mentioned described trivalent iron salt of second step can also be iron nitrate.
Above-mentioned described trivalent iron salt of second step can also be ferric sulfate.
Beneficial effect of the present invention is: the printing and dyeing industrial waste water technology of using the inventive method to handle is simple, good decolorizing effect, pollutent less residue, can reach national specified discharge standard.
Embodiment
Introduce manufacturing process of the present invention in detail below in conjunction with specific embodiment.
Embodiment 1: handle active orange waste water from dyestuff
The waste water starting point concentration is 200mg/L, 1000 times of colourities, CODcr=123mg/L.At first regulate the pH value to 3.0 of waste water, in waste water, add FeCl with HCL
3, add-on is 650mg/L, stirs fast then 3 minutes, stirs at a slow speed 15 minutes again, uses the 250W high voltage mercury lamp radiation to carry out abundant photoxidation in one and a half hours at last.By above-mentioned processing, can reach decolouring 100%, COD clearance 83%, the waste water after the processing reaches national specified discharge standard.
Embodiment 2: handle anthraquinone dye wastewater
The waste water starting point concentration is 400mg/L, and colourity is 1200 times, CODcr=187mg/L.At first regulate the pH value to 3.0 of waste water with HCL, add iron nitrate in waste water, add-on is 700mg/L, stirs fast then 4 minutes, stirs at a slow speed 25 minutes again, uses the 250W high voltage mercury lamp radiation to carry out abundant photoxidation in four hours at last.By above-mentioned processing, can reach decolouring 100%, COD clearance 95%, the waste water after the processing reaches national specified discharge standard.
Claims (4)
1. the treatment process of a printing and dyeing industrial waste water, it is characterized in that: may further comprise the steps: the first step is regulated pH value, according to the actual potential of hydrogen situation of waste water, adds acid in the waste water or alkali is regulated, and makes PH≤5.5 of waste water; Second step flocculated, and to adding trivalent iron salt and stir in the waste water of the first step processing, concentration reaches 600-1000 mg/litre waste water; The 3rd step was carried out photoxidation, will place under the UV-light irradiation half an hour to 5 hour through the waste water that second step handled.
2. the treatment process of a kind of printing and dyeing industrial waste water according to claim 1 is characterized in that: above-mentioned described trivalent iron salt of second step is an iron trichloride.
3. the treatment process of a kind of printing and dyeing industrial waste water according to claim 1 is characterized in that: above-mentioned described trivalent iron salt of second step can also be iron nitrate.
4. the treatment process of a kind of printing and dyeing industrial waste water according to claim 1 is characterized in that: above-mentioned described trivalent iron salt of second step can also be ferric sulfate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810163445A CN101746905A (en) | 2008-12-22 | 2008-12-22 | Method for treating printing and dyeing industrial waste water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810163445A CN101746905A (en) | 2008-12-22 | 2008-12-22 | Method for treating printing and dyeing industrial waste water |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101746905A true CN101746905A (en) | 2010-06-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200810163445A Pending CN101746905A (en) | 2008-12-22 | 2008-12-22 | Method for treating printing and dyeing industrial waste water |
Country Status (1)
| Country | Link |
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| CN (1) | CN101746905A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102491457A (en) * | 2011-12-14 | 2012-06-13 | 山东大学 | Treatment method for decolorizing azo dye waste water |
-
2008
- 2008-12-22 CN CN200810163445A patent/CN101746905A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102491457A (en) * | 2011-12-14 | 2012-06-13 | 山东大学 | Treatment method for decolorizing azo dye waste water |
| CN102491457B (en) * | 2011-12-14 | 2013-08-14 | 山东大学 | Treatment method for decolorizing azo dye waste water |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
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Open date: 20100623 |