Water Resource Risk Management

Effluent Management

VisEra actively develops water pollution prevention measures to reduce the potential impact in operations. We implement pollution prevention and treatment of wastewater quality indicators including biological oxygen demand (BOD), chemical oxygen demand (COD), fluoride ion concentration (F-), suspended solids (SS), and tetramethylammonium hydroxide (TMAH) discharge concentration. The indicators were in compliance with the discharge water standards of the Science Park. We also plan to expand the TMAH recovery system and the advanced organic reclaim (AOR) system to reduce the discharge concentration and increase the amount of reclaimed water. The average TMAH concentration of discharged wastewater is about 9.3mg/L in 2022 and the target TMAH concentration of discharged wastewater is <25mg/L in 2023.

Total wastewater discharge

Wastewater classification and recycling process