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The wastewater containing indigo is characterized by a dark blue color due to the presence of the dye not fixed to the fiber during the dyeing process.

The primary use for indigo is as a dye for cotton yarn, which is mainly for the production of denim cloth for blue jeans.

The wastewater containing indigo is characterized by a moderate amount of chemical oxygen demand (COD), pH, suspended solids, dissolved solids and a dark blue color.

due to the presence of the dye not fixed to the fiber during the dyeing process.

JIUWU HI-TECH utilizes the unique integrated membrane systems to recovery the insoluble indigo dye,the production of a secondary commercial product from waste stream through a by-product synergy process offers an attractive alternative to discharging the untreated effluent into municipal treatment plants or the environment.