Water Resource Management

Facing challenges associated with water resources, we analyze the impact of water risks and make business continuity planning with a focus on water conservation and recycling, implement the intelligent facility management (i-FM) system to optimize water management efficiency to address water shortages more effectively and optimize the stability of long-term operational management of the company’s water supply system. We also analyze water consumption balance and inventory the potential points of water reclamation of each site. By comparing and contrasting various indicative conservation measures across sites and within each site through FAC Technology Committee as the platform, we discover the differences and implement conservation measures across the sites through the platform. Every year we establish and implement targets and programs collectively, with the CSR Committee reviewing the effectiveness.
2019 Major Water Conservation Programs
● Installing the MBR to increase wastewater reclamation
1. Building the MBR+RO treatment system to improve wastewater treatment performance and reclaim wastewater.
2. Total water treatment included DMSO wastewater, organic backwash water, secondary discharge and organic wastewater.
● Increasing DMSO wastewater reclamation: Expanding the MBR+RO reclamation system to reclaim OWW wastewater up to 400CMD.
● Reclaiming a small volume of CF organic wastewater with the MRB system
● MBR secondary RO water volume enhancement project
1. Diluting MBR RRO water quality with effluent of low conductivity to increase reclamation volume.
2. Increasing MBR PRO vessels from 7 to 107 to reduce RO clogging and increase water volume.
● Biological wastewater reclamation:
1. Modifying the backwash water pipes of the sand filter of the reclamation system to reclaim and recycle waste for reuse.
2.Modifying the backwash water pipes of the activated charcoal filter of the reclamation system to reclaim and recycle waste for reuse.
● Backwash water reclamation: Modifying the biological MRB concentration system to increase the water quality monitoring equipment and pipelines for reclaiming biological wastewater.
 
Review of Water Efficiency
Water Consumption
(Unit: Mm3)
Y2015 Y2016 Y2017 Y2018 Y2019
Taiwan Site 24.19 22.96 25.04 21.83 20.21
China Site 5.89 1.77 1.69 1.90 1.69
Total 30.08 24.73 26.73 23.73 21.90
Water Saving Management Index
Item Y2016 Y2017 Y2018 Y2019
Taiwan Site
Water consumption per unit output area at TFT-LCD
(m3/m2)
0.330 0.329 0.277 0.261
China Site
Water consumption per unit output quantity
(m3/pc)
NGB 0.0060 0.0044 0.0047 0.0049
FS 0.0213 0.0164 0.0151 0.0122
NJ 0.00366 0.00316 0.00591 0.00338
SH 0.0187 0.0267 0.0169 0.0135
Water Recycling Effectiveness
Process water Reclamation ratio
(Unit:%)
Y2015 Y2016 Y2017 Y2018 Y2019
Taiwan Site 94.3% 95.4% 95.4% 96.2% 96.7%
Wastewater Discharge
Item
(Unit:ton)
Y2015 Y2016 Y2017 Y2018 Y2019
Taiwan Site 18,288,309 16,824,226 18,485,079 15,048,592 13,261,768
Wastewater Quality Index
Item
(Unit:ton)
Y2015 Y2016 Y2017 Y2018 Y2019
COD 1,778.5 2,101.7 2,137.7 1,619.1 1,392.7
BOD 556.4 708.5 829.7 601.4 489.8
SS 867.7 679.3 1,127.0 653.6 665.1