When textiles are processed in alkali solution, using the hydrolytic denudation of alkali on textiles, the cloth receives a silky shine, soft touch, and produces alkali deweighting wastewater. The characteristics of alkali deweighting wastewater are high pH, high COD, main pollutants are sodium terephthalate, which is hard to be biodegraded. There are various wastewater quality and quantity with different process and technology.
TA is an important material in producing polyester and plasticizer, but tradition technology produce poor purity and less value to recycle. Implementing KS-C purification device, with acid precipitation to recycle the TA within the alkali deweighting wastewater, a 99% TA can be obtained, which has high recycling value, while decrease more than 65% pollution load, to relieve the environmental burden of further wastewater treatment.
APPLICATION CASE
One textile factory produces 200m/d alkali deweightingwastewater, COD 35,000-40000 mg/L, using Keysino KS-TA recycling system, it is able to recycle 99% TA 2t/d and heat, the investment recovery period is one year. After the treatment, the water COD is 13,000-15,000 mg/L with high biodegradability, and can be drained into biochemical wastewater treatment system, which meet the discharge standard.
SYSTEM SPECIFICATION