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Method and device for advanced treatment of printing and dyeing wastewater

A technology for advanced treatment, printing and dyeing wastewater, applied in textile industry wastewater treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc. The effect of strengthening, prolonging the filtration period and reducing the load

Inactive Publication Date: 2013-02-27
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But the coagulation method has no effect on chromaticity and COD Cr The removal effect is not ideal

Method used

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  • Method and device for advanced treatment of printing and dyeing wastewater

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Effect test

Embodiment 1

[0058] The wastewater used in the test was effluent from the secondary treatment of printing and dyeing wastewater from a printing and dyeing enterprise in Dongguan City. The turbidity is 5-50NTU, COD Cr It is 15-70mg / L. The raw water is lifted by the pump 2, and its flow rate is controlled by the valve 3 to 50L / h; the coagulant is added by the peristaltic pump 14, and the flow rate is 1mL / min. The raw water and the coagulant are mixed and reacted in the reactor 6, the stirring speed of the agitator 5 is set to 50 rpm, and the hydraulic retention time is 10 minutes. The reacted water passes through the filter column 8 from top to bottom under the suction of the pump 9, and the flow rate is 50 L / h, which is controlled by the valve 10. The filtered water enters the water storage tank 12, and then enters the circulating water tank 21 under the lifting action of the pump 18, and the flow rate is controlled by the valve 19 to be 50L / h, and the water in the circulating water tank e...

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Abstract

The invention discloses a method for advanced treatment of printing and dyeing wastewater. By means of a combined process of enhanced nano-iron coagulation, sand leach and ultrafiltration, the method includes that water in an original water tank is conveyed to a reactor through a pump to be subjected to mixing reaction with a nano-iron composited coagulant, then the water is filtered through a filtration column to enter in a water storage tank, conveyed to a circulation water tank through the pump, and subjected to cross flow filtration by using an ultrafiltration membrane assembly, clear water enters a recycling water tank, and concentrated water returns to the circulation water tank to participate in circulation. The invention further discloses a device for implementing the method. After operation of the method and the device, qualities of yielding water meet requirements of qualities of recycling water of urban sewage and industrial water, and the method and the device are wide in application prospect in advanced treatment fields of the printing and dyeing wastewater.

Description

technical field [0001] The invention relates to a method for advanced treatment of printing and dyeing wastewater. [0002] The invention also relates to a device for implementing the above method. Specifically, it is about the process and device for the advanced treatment of printing and dyeing wastewater by the combined process of nano-iron enhanced coagulation-sand filtration-ultrafiltration. Background technique [0003] Printing and dyeing wastewater has the characteristics of large water volume, high chroma, and complex composition. Moreover, the wastewater contains dyes, auxiliaries, trace toxic substances, and surfactants. It is an industrial wastewater with poor biochemical properties. [0004] The shortage of water resources and the discharge of pollutants have become the limiting factors for the development of the printing and dyeing industry. At present, emerging treatment technologies include advanced oxidation technology, high-efficiency degradation bacteria,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F103/30
Inventor 葛小鹏周争毕哲郑蓓赵丽王东升汤鸿霄
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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