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 HUNA DYEING™ process reduces CO₂ emissions by up to 70% compared to chemical dyeing*. This is achieved through process shortening and efficiency. (*Calculated through a professional institution in 2023)
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.
