Corporate Social Responsibility

Annual Environmental and Material Flow

Item/Year Units 2014 2015 2016 2017 2018
Consumption of energy resources and materials Water consumption Million tons Mm3 28.91 26.25 24.72 26.73 23.73
Power consumption MWh 5,025,675 4,954,781 5,119,279 5,480,337 5,492,874
Diesel MWh 3,261 3,144 3,413 4,654 72,526
Natural Gas MWh 129,622 127,364 122,701 130,909 141,253
Liquid crystal Tons 101.1 100.01 94.2 103.4 103.6
Aluminum/copper etching solutions (Note 1)
 
Tons 17,670.0 19,280.6 19,003.7 20,051.6 22,104.2
Developer Tons 20,800.8 21,294.3 21,404.9 24,200.1 21,969.3
Stripper Tons 16,111.0 6,647.2 14,237.8 17,532.4 19,735.9
Thinner Tons 7,466.9 15,048.3 6,051.6 7,221.9 6,648.6
Photoresist Tons 6,499.3 7,190.7 6,221.5 6,491.4 7,197.4
Greenhouse gas emissions Scope 1 Million tCO2e 0.511 0.439 0.455 0.436 0.369
Scope 2 Million tCO2e 3.135 2.804 2.615 3.034 3.232
Scope 3 Million tCO2e 0.035 0.018 0.025 0.022 0.014
Wastewater discharge Wastewater volume Tons 21,807,195 19,822,541 17,891,774 19,398,443 16,018,051
Chemical oxygen demand Tons 2,152.7 1,778.5 2,101.7 2,137.7 1,619.1
Biochemical oxygen demand Tons 703.3 556.4 708.5 829.7 601.4
 
Suspended solids
Tons 1,003.3 867.6 679.3 1,127.0 653.6
Water recycling Rate of water recycling throughout production processes % 84.9% 94.2% 95.4% 95.4% 96.2%
Volume of water recycled from production processes
 
Tons 69,873,633 235,957,877 237,898,589 288,678,559 271,591,031
Waste disposal Total Waste volume Tons 111,264 97,694 98,556 116,128 104,710
Hazardous waste Tons 29,169 68,476 31,951 32,420 28,422
Ordinary waste Tons 82,095 29,218 66,605 83,709 76,288
Air pollutant emissions  
VOCs
Tons 151.9 104.7 158.2 157.8 136.1
Sulfur oxides Tons 15.2 42.3 46.2 38.3 44.9
Nitrogen oxides Tons 16.3 15.8 15.3 20.2 26.3
Note 1: The figures for 2015 to 2017 only refer to aluminum etching solutions; the figure for 2018 refers to aluminum/copper etching solutions