Our Focuses｜Environmental Sustainability｜Water Management
2022 Target Achievement
|Indicators and Targets||2022 Targets||2022 Achievements|
|Water consumption per product unit(liter/layer - wafer photomask)||≦145||134|
|Fab Water Recycling Rate (%)||≧80%||80.5%|
Winbond continues to increase water recycling rates. In 2022, the overall plant recycled approximately 80.5% of its water and 89.3% of its process water (meeting the science park’s commitment under the environmental impact assessment to recycle more than 77% of all water used, and more than 85% of all process water used). Winbond implemented 3 new water conservation measures in 2022 that increased total water saved by 64,000 cubic meters.
Water Recycling Performance in Past Years
Winbond’s wastewater treatment facilities are designed to collect up to 20 types of waste liquids through separate pipelines standardizing wastewater quality. Each wastewater type is then treated through 11 distinct wastewater treatment facilities. Operating and discharge permits are applied for pursuant to the Water Pollution Control Act and the Soil and Groundwater Pollution Remediation Act.
Testing is conducted by a laboratory accredited by the Environmental Analysis Laboratory twice a year to confirm that the discharge water quality satisfies CTSP’s influent standards. Additionally, in order to reduce the environmental burden of the wastewater treatment facility, and to reduce the use of chemical products, Winbond also collect and treat waste liquids from the washing towers, cooling towers, process cooling water, and recycled soft water from production processes, reusing this treated waste liquid in secondary water applications throughout the site Apart from these measures, Winbond has continued to promote improvements to our water pollution prevention facilities, reduced our pollutant biochemical oxygen demand (BOD), chemical oxygen demand (COD), and the amount of suspended solids (SS) and sludge.
Measured COD, SS and BOD values for 2022 were far below the CTSP influent standards.