Resource utilization of desizing wastewater / alkali recovery / reclaimed water reuse
The ceramic ultrafiltration membrane technology is used to concentrate the treatment of printing and dyeing desizing wastewater. The treated liquid is directly recycled to the desizing process, and water and caustic soda are completely reused to achieve zero discharge of sewage treatment. This technology has achieved industrial scale application and has obtained 1 national invention patent.
Reuse treatment of desizing wastewater generated in desizing section during printing and dyeing process using ceramic membrane process
① The printing and dyeing desizing wastewater contains a large amount of non-degradable slurry. The slurry enters the sewage treatment system, which increases the difficulty of biochemical treatment and increases the cost of sewage treatment. Printing and dyeing desizing wastewater contains a higher concentration of caustic soda (0.5% ~ 7%) and a certain amount of refining agent, etc., which has a high recovery value.
② The ceramic ultrafiltration membrane technology is used to concentrate the treatment of printing and dyeing desizing wastewater. The treated membrane liquid is directly reused to the desizing process, in which water and caustic soda can be completely reused to achieve zero discharge of sewage treatment. spineinternational.orgpany has used ceramic ultrafiltration membrane technology to treat desizing wastewater and has achieved very good results.
Comparison of desizing wastewater before and after treatment with ceramic ultrafiltration membrane
The refining water of a printing and dyeing plant in Nantong uses ceramic membrane technology for wastewater treatment. The designed daily treatment capacity of the project is more than 500m3, and the produced water meets the workshop reuse requirements.
Desizing wastewater treatment project site
|500t / d desizing wastewater ceramic membrane system|
Utilizing ultrafiltration (UF) + reverse osmosis (RO) integrated membrane technology to carry out advanced treatment of printing and dyeing wastewater to achieve reuse and zero discharge of printing and dyeing wastewater.
|Ultrafiltration system (UF)||Reverse Osmosis System (RO)||Raw water and water production indicators|