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Printing and dyeing wastewater deep treatment method

A printing and dyeing wastewater and advanced treatment technology, which is applied in energy wastewater treatment, textile industry wastewater treatment, water/sewage treatment, etc., can solve the problems of increasing drinking water treatment costs, allergies, tissue changes, and mutagenicity, etc., to facilitate recycling , easy to separate, increase the effect of adsorption capacity

Active Publication Date: 2017-11-03
金华雅帅纺织有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Azo groups, aromatic groups of residual dyes, and aromatic amine organic compounds produced by the metabolism of dye microorganisms have certain carcinogenic, teratogenic, and mutagenic effects, as well as obvious biological inhibition and biological toxicity. Due to its relatively stable properties (such as the half-life of reactive blue 19 dye in the natural environment is as high as 49 years), its residue and enrichment in the natural environment will eventually affect people through the water cycle, and it will cause allergies and tissue changes after contact with the human body; another On the one hand, highly aromatic organic carbon compounds and organic nitrogen compounds remaining in the printing and dyeing biochemical effluent will affect the quality of surface water source water, not only increase the cost of drinking water treatment, but also form a higher concentration of carbon-sourced and nitrogen-sourced disinfection by-products

Method used

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  • Printing and dyeing wastewater deep treatment method
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  • Printing and dyeing wastewater deep treatment method

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Effect test

Embodiment 1

[0031] A method for advanced treatment of printing and dyeing wastewater, the method comprising the following steps:

[0032] Step 1. Media filtration: Media filtration is performed on the discharge water after the printing and dyeing wastewater has been treated by the combined process of coagulation sedimentation, anaerobic hydrolysis and activated sludge aeration. Quartz sand, activated carbon or fly ash is used as the filter media filter, and the media particles Particle size 0.8~1.2mm, backwash cycle 1~7d;

[0033] Step 2. Adsorption of magnetic hydrogel microspheres: the effluent after medium filtration is passed into the adsorption reaction tank, and 0.1kg of magnetic hydrogel microspheres are put in per ton of water, and the adsorption rate is controlled by the effect of an external magnetic field. After the adsorption is completed , separating and recovering the magnetic hydrogel microspheres;

[0034] Step 3, photocatalytic reaction: the printing and dyeing wastewate...

Embodiment 2

[0043] A method for advanced treatment of printing and dyeing wastewater, the method comprising the following steps:

[0044] Step 1. Media filtration: Media filtration is performed on the discharge water after the printing and dyeing wastewater has been treated by the combined process of coagulation sedimentation, anaerobic hydrolysis and activated sludge aeration. Quartz sand, activated carbon or fly ash is used as the filter media filter, and the media particles Particle size 0.8~1.2mm, backwash cycle 1~7d;

[0045] Step 2. Adsorption of magnetic hydrogel microspheres: the effluent after medium filtration is passed into the adsorption reaction tank, and 0.15kg of magnetic hydrogel microspheres are put in per ton of water, and the adsorption rate is controlled by the effect of an external magnetic field. After the adsorption is completed , separating and recovering the magnetic hydrogel microspheres;

[0046] Step 3, photocatalytic reaction: the printing and dyeing wastewat...

Embodiment 3

[0055] A method for advanced treatment of printing and dyeing wastewater, the method comprising the following steps:

[0056] Step 1. Media filtration: Media filtration is performed on the discharge water after the printing and dyeing wastewater has been treated by the combined process of coagulation sedimentation, anaerobic hydrolysis and activated sludge aeration. Quartz sand, activated carbon or fly ash is used as the filter media filter, and the media particles Particle size 0.8~1.2mm, backwash cycle 1~7d;

[0057] Step 2. Adsorption of magnetic hydrogel microspheres: the effluent after medium filtration is passed into the adsorption reaction tank, and 0.2kg of magnetic hydrogel microspheres are put in per ton of water, and the adsorption rate is controlled by the effect of an external magnetic field. After the adsorption is completed , separating and recovering the magnetic hydrogel microspheres;

[0058] Step 3, photocatalytic reaction: the printing and dyeing wastewate...

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Abstract

The invention discloses a printing and dyeing wastewater deep treatment method which includes the steps: first, medium filtration; second, magnetic hydrogel micro-sphere adsorption; third, photocatalytic reaction; fourth, electrostatic spinning nanofiber membrane filtration; fifth, ultrafiltration membrane segment. According to the printing and dyeing wastewater deep treatment method, most impurities, organic matters and heavy metal ions are adsorbed by magnetic hydrogel micro-spheres with excellent performances, the organic matters are directly mineralized by a photocatalytic reactor, and most inorganic salts are removed by ultrafiltration membranes through polyvinyl alcohol / chitosan electrostatic spinning nanofiber membrane adsorption. The printing and dyeing wastewater deep treatment method is simple to operate, high in efficiency, free from secondary pollution and low in cost, and the water quality of obtained recycled water meets textile printing and dyeing industrial water standards.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to an advanced treatment method for printing and dyeing wastewater. Background technique [0002] Currently, water pollution is one of the urgent problems in China. With the continuous increase of industrial production, the discharge of industrial sewage is becoming more and more serious. A large amount of industrial sewage is directly discharged into the river, which endangers the aquatic biological system and seriously affects human life. Printing and dyeing wastewater is wastewater discharged from printing and dyeing factories that mainly process cotton, hemp, chemical fibers and their blended products. Printing and dyeing wastewater has a large amount of water, 100-200 tons of water is consumed per ton of textile printing and dyeing, and 80-90% of it becomes wastewater. [0003] For the treatment of printing and dyeing wastewater, the use of biochemical treatment ...

Claims

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Application Information

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IPC IPC(8): C02F9/12B01J20/28B01D69/02B01D71/66C02F103/30C02F101/20C02F101/30
CPCY02W10/37C02F9/00B01D69/02B01D71/66B01D2325/26B01J20/28009B01J20/28047C02F1/001C02F1/30C02F1/44C02F1/444C02F1/488C02F2101/20C02F2101/308C02F2103/30C02F2303/14C02F2305/10
Inventor 冯婷婷
Owner 金华雅帅纺织有限公司
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