The polyester filament division at FEIS-Polyester Business uses hydrolysis furnaces, which integrate vacuum combustion and steam hydrolysis, to remove macromolecular compounds attached to the spinneret and nozzle interior. The process, which reduces hazardous waste, replaced the original MEG boiling method. The wastewater generated from the hydrolysis furnace contains a minimal concentration of contaminants, which can be recycled and reused once processed through the wastewater treatment system. This project reduces approximately 60 metric tons of waste MEG residue annually, and saves nearly NT$1 million in the cost of hazardous waste treatment.