A method and device for treating and reusing waste water from on-line printing, dyeing and washing

Abstract

The invention relates to a method for on-line treatment and recycle of printing and dyeing washing waste water and a device thereof, and the method comprises the following steps: treating printing and dyeing washing waste water by an adsorption filtration device (3), recycling the treated water in a washing procedure (1) directly, allowing an adsorption medium to be adsorbed saturatedly, performing regeneration by a regeneration device; allowing the regenerated waste liquid and the waste water after backwashing to enter a superior oxidation area for further oxidation and degradation, discharging after the water reaches the standard. The device comprises a water inlet pipe and a water outlet pipe, and also comprises three parts of an adsorption filtration device (3), a regeneration device (2), and a superior oxidation device (4). The method of the invention has simple operation and management, low equipment investment and running cost, and is convenient for popularization and application; During the adsorption filtration process of the invention, no chemical reagent is needed to be added, and no secondary pollution is caused, and thus no additional effect on dyeing quality is caused; The invention is applicable to the on-line treatment and recycle of dyeing washing waste water of anionic or cationic water-soluble dyes such as active dyes, acid dyes, weak-acid dyes, basic dyes, etc.

Description

technical field [0001] The invention belongs to the field of industrial wastewater treatment, and in particular relates to a method and a device for treating and recycling online printing and dyeing washing wastewater. Background technique [0002] At present, China has become the country with the largest production scale in the world's textile printing and dyeing industry. Textile printing and dyeing enterprises are not only major local water users, but also major wastewater dischargers. In 2009, the national output of printing and dyeing cloth from January to December totaled 53.980 billion meters, and the water consumption per 100 meters of cloth, which generally reached the advanced level of national clean production, was 3m 3 Calculated, the total water consumption is 1.619 billion m 3 , which is equivalent to the total storage capacity of 157 West Lakes (the storage capacity of West Lake is about 10.3 million tons). In view of the continuous increase in water prices...

AI Technical Summary

Problems solved by technology

[0007] ② Lack of reuse water quality standards and reuse water quality components and the toxicity or potential toxicity of organic degradation products for the safety evaluation of recycled fabrics, resulting in low recognition of printing and dyeing enterprises and the public for the application of recycled water printing and dyeing processing

These difficult-to-remove substances will gradually accumulate in the process of printing and dyeing wastewater reuse due to different treatment and reuse processes. Cumulative Mathematical Models for Prediction

[0012] ④ The investment cost and operating cost of printing and dyeing wastewater reuse technology are relatively high, the water market is not perfect, and there is a lack of commercial planning for the regeneration and reuse of printing and dyeing wastewater

This type of detergent has the disadvantages of large dosage (about 2g / L), low resistance to hard water, and poor biodegradability. Although researchers are looking for synthesizing some amphoteric surfactants with high cleaning performance and easy biodegradation, due to Among them, the increase of COD of washing wastewater caused by organic components is inevitable, and it also increases the production cost of enterprises.

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