Textile printing and dyeing needs to discharge a large amount of wastewater. The amount of wastewater in printing and dyeing plants is relatively large, the content of organic pollutants is high, the alkalinity is large, and the water quality changes greatly. And usually accompanied by a large amount of foam, so the printing and dyeing water treatment process requires industrial printing and dyeing water treatment defoamers, defoamers can defoam and suppress foam.
(Picture: Textile printing and dyeing production scene)
The water quality characteristics of textile printing and dyeing wastewater and the cause of foaming
Due to the production process, the water quality of wastewater discharged from printing and dyeing plants usually has the characteristics of high content of organic pollutants, complex components, deep color, and strong alkalinity. The characteristics of sewage produced in different production stages are different:
1. Scouring wastewater
Scouring mainly uses aqueous solutions such as caustic soda and surfactants. Under high temperature and alkaline environment, the textile is scoured to remove impurities such as grease and pectin on the textile fiber to ensure the processing quality of bleaching and beam trimming. The scouring wastewater has the characteristics of large amount, high water temperature, and rich in surfactants. Therefore, the scouring wastewater is prone to foam.
2. Printing wastewater
The printing waste water mainly comes from the washing waste water of the color paste, the printing drum, the printing screen, and the soaping and washing waste water in the post-processing of printing. Since the amount of slurry in the printing paste is several to several tens of times more than the amount of dye, the printing wastewater contains a large amount of slurry in addition to dyes and auxiliaries, and BOD5 and CODcr are both high. The amount of printing wastewater is large, the concentration of pollutants is high, and foam is easy to produce.
Textile printing and dyeing is a major industrial waste water drainage, and the composition is relatively complex, and it is prone to a large amount of foam, which is difficult to handle. Foam will affect the water treatment process and emission indicators. It can be treated by adding the corresponding defoamer.
(Picture: Cause analysis of blistering in textile water treatment)
Nanhui printing and dyeing wastewater defoaming plan
In the textile printing and dyeing water treatment process, various auxiliary agents, especially penetrants, emulsifiers, detergents, etc., are usually used in the production process, resulting in foam; in addition, the water treatment process is also one of the factors that cause foaming.
Nanhui defoamer manufacturer has developed a targeted industrial printing and dyeing water treatment defoamer based on the foaming characteristics of the textile printing and dyeing wastewater treatment process. It is characterized by high temperature resistance and strong acid and alkali environment, and can continuously defoam and suppress foam under harsh conditions. It is very suitable for all stages of the textile printing and dyeing process. It is used in the printing and dyeing wastewater treatment process. The dosage is small and the effect is obvious.
(Picture: Sample of Nanhui Industrial Printing and Dyeing Water Treatment Defoamer)
Nanhui industrial printing and dyeing water treatment defoamer has the following defoaming advantages:
1. Acid and alkali resistance, high temperature resistance 95~130°C. In the medium and high temperature environment, it can continue to defoam and suppress foam;
2. High concentration, high content of defoaming ingredients, small addition amount, the general dosage is one ten thousandth to one hundred thousandth of the defoaming system, the specific dosage can be tested experimentally;
3. It is physiologically inert, does not react with the components in the sewage, does not affect the treatment process, does not affect the filter membrane, and does not affect the microorganisms.
The source manufacturer of Nanhui defoamer can solve various industrial foam problems in a targeted manner. If you encounter bubble problems in related industries, please call Nanhui technical specialist yoyo 13428601010
