Advanced treatment apparatus for printing and dyeing wastewater

Abstract

The invention relates to an advanced printing and dyeing wastewater treatment device, which is composed of a grilled pool, a preliminary sedimentation tank, an acid and alkali regulating reservoir, a decoloration reaction tank, a sedimentation tank, a neutralization pond, a lifting service reservoir, a filter chamber and two sedimentation tanks. The decoloration reaction tank is internally provided with a scrap iron layer with the thickness being 10-20 cm and a blender, and the biggest grain diameter of the used scrap irons is not more than 5 mm. the application range of treating printing and dyeing wastewater by the invention is wide, the advanced printing and dyeing wastewater treatment device has better contaminant removal effect, and can increase and decrease properly the stage number and the scale of the biological and geological filter according to the demands. The operation is simple, the running management is convenient, the secondary pollution produced in the running process of the device is less, and the self-purification capacity of the water body is fully utilized. The energy consumption is low, the investment is little, and the running management cost is little, the sources of the scrap irons and the natural river sand required by the device are wide, and very marked environmental and social benefits are obtained.

Description

technical field [0001] The invention belongs to the technical field of advanced treatment of printing and dyeing wastewater, in particular to a device for advanced treatment of printing and dyeing wastewater. Background technique [0002] Printing and dyeing wastewater has the characteristics of large water volume, high concentration of organic matter, high chroma, high content of inorganic salts, complex components, and poor biodegradability. Due to the low treatment rate, the discharge of printing and dyeing wastewater has brought serious pollution to the water environment. After being discharged into rivers, lakes, seas and ground water, the residual dye molecules can absorb light, reduce the transparency of water, affect the growth of aquatic organisms and microorganisms, which is not conducive to self-purification of water, and is easy to cause visual pollution. The poisonous and harmful substances contained in it are also quite harmful to the human body, animals and pl...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the problems of poor treatment efficiency and high cost faced by the existing printing and dyeing wastewater treatment system, the present invention provides a printing and dyeing wastewater advanced treatment device, which has high treatment efficiency and low cost

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