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Comprehensive treatment method of dyeing wastewater

A technology for comprehensive treatment, printing and dyeing wastewater, applied in energy wastewater treatment, textile industry wastewater treatment, water/sewage multi-stage treatment, etc., can solve the problems of large area, low sludge yield, slow anaerobic reaction, etc. To achieve the effect of small footprint, good water quality and simple operation

Active Publication Date: 2013-07-17
浙江一清环保工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Biological methods include aerobic biological treatment and anaerobic biological treatment; aerobic biological treatment has the disadvantages of large floor area, large amount of residual sludge, and high treatment cost.
Anaerobic biological treatment has the advantages of low sludge yield, low energy consumption, low nutritional requirements, recyclable energy, and removal of refractory pollutants; however, it has disadvantages such as slow anaerobic reaction, generation of malodorous gases, and high treatment costs

Method used

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  • Comprehensive treatment method of dyeing wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] refer to figure 1 , a method for comprehensive treatment of printing and dyeing wastewater, comprising the following steps:

[0040] (1) After the waste water is intercepted by the grid, the adsorption treatment of fly ash is carried out. The particle size of the fly ash is 180 mesh, and the dosage of the fly ash is 8g / L; a certain amount of magnesium sulfate is put into the adsorption process, and the magnesium sulfate is added The amount is 0.15g / L; After this step, the removal rate of COD is 40.06%, the removal rate of SS is 48%, and the removal rate of chroma is 60%;

[0041] (2) Step (1) After the effluent is filtered by the sedimentation tank, it enters the adjustment tank to adjust the pH value to 8;

[0042] (3) The effluent from step (2) enters the bubble column and adds dodecyltrimethylammonium bromide as a capture agent for air flotation and decolorization treatment. The amount of dodecyltrimethylammonium bromide added and the adjustment The molar ratio of ...

Embodiment 2

[0051] refer to figure 1 , a method for comprehensive treatment of printing and dyeing wastewater, comprising the following steps:

[0052] (1) After the waste water is intercepted by the grid, the adsorption treatment of fly ash is carried out. The particle size of the fly ash is 200 mesh, and the dosage of the fly ash is 10g / L; a certain amount of magnesium sulfate is put into the adsorption process, and the magnesium sulfate is added The amount is 0.2g / L;

[0053] (2) Step (1) After the effluent is filtered by the sedimentation tank, it enters the adjustment tank to adjust the pH value to 7;

[0054] (3) The effluent of step (2) enters the bubble column and adds dodecyltrimethylammonium bromide as a capture agent for air flotation and decolorization treatment. The addition amount of dodecyltrimethylammonium bromide and adjustment The molar ratio of the amount of dye pigment detected in the pool is 0.9:1;

[0055] (4) The effluent from step (3) enters the hydrolytic acidi...

Embodiment 3

[0064] refer to figure 1 , a method for comprehensive treatment of printing and dyeing wastewater, comprising the following steps:

[0065] (1) After the waste water is intercepted by the grid, the adsorption treatment of fly ash is carried out. The particle size of the fly ash is 160 mesh, and the dosage of the fly ash is 10g / L; a certain amount of magnesium sulfate is put into the adsorption process, and the magnesium sulfate is added The amount is 0.15g / L;

[0066] (2) Step (1) After the effluent is filtered by the sedimentation tank, it enters the adjustment tank to adjust the pH value to 9;

[0067] (3) The effluent of step (2) enters the bubble column and adds dodecyltrimethylammonium bromide as a capture agent for air flotation and decolorization treatment. The addition amount of dodecyltrimethylammonium bromide and adjustment The molar ratio of the amount of dye pigment detected in the pool is 0.6:1;

[0068] (4) The effluent from step (3) enters the hydrolytic acid...

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Abstract

The invention relates to a comprehensive treatment method of dyeing wastewater. The comprehensive treatment method comprises the following steps of: adsorbing the wastewater by using pulverized fuel ash after passing through a grating, and adding an appropriate amount of additive in the adsorption process; filtering effluent, then adjusting the pH value of the filtered effluent, adding the effluent to a bubbling tower to further carry out decoloring treatment; and adding the decolored effluent to a hydrolysis acidification pool to carry out anaerobic treatment, carrying out further biochemical treatment by using a biological aerated filter, carrying out biological oxidation and intercepting suspended solids, and therefore a subsequent secondary sedimentation tank is saved; and finally, carrying out advanced treatment by using a security filter and an ion-exchange column, wherein the effluent can be close to the recyclable requirement. The comprehensive treatment method can be used for effectively removing fine suspended solids (SS), COD (Chemical Oxygen Demand) and chromaticity in the dyeing wastewater, and the removal rate of the SS, COD and chromaticity can reach more than 98 percent; the comprehensive treatment method has the advantages of small occupied area, low investment, simpleness in operation, low energy consumption, operation stability, no sludge bulking and the like; and in addition, the purposes of treatment of wastes with processes of wastes against one another and comprehensive utilization are achieved, the effluent quality is favorable, and the requirement of the water quality of reuse water for production can be met.

Description

technical field [0001] The invention belongs to the industry of industrial wastewater treatment, and in particular relates to a comprehensive treatment method for printing and dyeing wastewater. Background technique [0002] The printing and dyeing industry is a typical water-intensive industry that consumes nearly 100 million tons of demineralized water for process every year. Printing and dyeing wastewater mainly contains dyes, slurry, dyeing auxiliaries and fiber impurities, oil agents, acids, alkalis and inorganic salts, etc., with complex components and large discharge volume, high chroma, high alkalinity, high pH, ​​high organic content, Refractory biodegradable substances are many and changeable, and direct discharge will bring great harm to human health and the living environment, and at the same time cause waste of water resources. It is recognized as one of the most difficult major harmful wastewater to treat. [0003] The existing printing and dyeing wastewater t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F103/30
CPCY02W10/37
Inventor 陈建军项海田帅慧
Owner 浙江一清环保工程有限公司
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