Currently, wastewater treatment technology for textile dyeing industry is widely applied such as Aerotank (aerobic biological tank), blower, activated sludge, SBR and MBBR.
The choice of methods and technologies for wastewater treatment in the textile dyeing industry depends on many factors such as budget, land, flow rate and wastewater characteristics of each production facility. E&C Vietnam Environmental Technology Services Joint Stock Company, which is a reputable industrial wastewater treatment unit, will consult customers to choose the appropriate wastewater treatment technology.
The textile dyeing industry is one of Vietnam's strengths, as a key industry. However, the production process uses a few sources of fuels, dyes and chemicals with high levels of pollution to the environment.
Wastewater sources of textile dyeing industry arise from many production stages that includes: Sizing, desizing, cooking, bleaching, dyeing and finishing. The pollutants in wastewater and the properties of wastewater are illustrated through the table below:
Stage |
Pollutants |
Characteristic |
Sizing |
Starches, resins, fats and waxes |
High BOD concentration accounts for over 35% |
Brown bleach |
Waxy, grease, ash, soda, fiber chips |
High BOD concentration accounts for about 30%, high alkalinity, dark color |
Bleaching |
Compounds containing Chlorine, NaOH, Hypochlorite, AOX |
High alkalinity, BOD accounts for 5% |
Polish |
Impurity, NaoH |
Very high color temperature |
Dye |
Dyes, metal salts, acetic acid |
High color temperature, BOD accounts for 6% |
|
Pigments, starch, oil, clay, salt, metals, acids |
High color temperature, high BOD concentration, grease |
Finished products |
Animal fat, salt, starch |
Mild alkaline, less BOD |
The effects of wastewater from textile dyeing industry on the environment:
In the textile dyeing industry, the wastewater flow and concentration of pollutants vary greatly by season, product and product quality, manufacture factory as well as day by day. Therefore, it is necessary to survey, study and sample and analyze wastewater of each manufacture factory at different times to be able to apply the appropriate textile and dyeing wastewater treatment system and technology.
Applicable treatment methods include:
The commonly applied wastewater treatment technologies include Aerotank (aerobic biological tank), blower, activated sludge, SBR and MBBR.
MBBR (Moving Bed Biofilm Reactor) is a modern technology combining traditional Aerotank and aerobic biological filtration, which has outstanding advantages over other wastewater treatment technologies, especially traditional technologies:
Please contact E&C Vietnam Environmental Technology Services Joint Stock Company if you want to consult more about wastewater treatment technology for textile dyeing industry. Hotline 0914 113 286
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