RO water treatment system for printing and dyeing wastewater treatment

Printing and dyeing textile wastewater not only has high chroma and large amount of water, but also has very complex components. The wastewater contains dyes, sizing agents, oil agents, auxiliaries, acid and alkali, fiber impurities and inorganic salts, etc. The dye structure also contains many large biological toxicity. Such substances, such as nitro and amine compounds and heavy metal elements such as copper, chromium, zinc, arsenic, etc., will cause serious pollution to the environment if they are directly discharged without treatment.

Zenghangcheng applies ultrafiltration + RO double membrane technology to treat printing and dyeing wastewater. Ultrafiltration can effectively remove macromolecular organic matter in wastewater, reduce turbidity, and make the influent water quality meet the requirements of RO membrane. After RO treatment, the removal rate of organic matter and salt It can reach more than 99% and 93% respectively. The chemical oxygen demand of the produced water is less than 10mg·L-1, and the electrical conductivity is less than 80μS·cm-1. The produced water meets the water standards for most printing and dyeing processes. Zhong Jing uses hollow fiber ultrafiltration membrane and RO technology to treat wool printing and dyeing wastewater. Under the conditions of operating pressure of 0.1MPa and flow rate of 1500L·h-1, indicators such as chromaticity and salt content have been significantly reduced. COD value, The chromaticity meets the emission standards.