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Wastewater and CO₂ Emissions

HUNADYING™ technology reduces wastewater concentrations and CO₂ emissions.

Wastewater Concentration

The wastewater in GREENWEAR is about one-fifth the concentration of wastewater generated by chemical dyeing. This is because the amount and type of chemicals used in dyeing are very small.


This reduces pollution in rivers, seas and soil from dyed wastewater, and also reduces energy and CO₂ emissions used for purification and sewage treatment of chemicals in dyed wastewater.

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CO₂ Emissions

The CO₂ emission of the HUNA DEYING™ process is 80% of chemical dyeing. These are results achieved through process shortening and efficiency, and are conservatively calculated.

Plant-based biomass dyestuffs grow by absorbing carbon dioxide from the atmosphere for photosynthesis. Conversely, synthetic dyes use petroleum, which contains 83 to 90 percent carbon, as raw materials. The process of producing synthetic dyes is no different from using carbon that is sealed deep inside the surface of the earth.

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