Corporate Social Responsibility

Annual Environmental and Material Flow

Item/Year Units 2015 2016 2017 2018 2019
Consumption of energy resources and materials Water consumption Million tons Mm3 26.25 24.72 26.73 23.73 21.90
Power consumption MWh 4,954,781 5,119,279 5,480,337 5,492,874 5,675,953
Diesel MWh 3,144 3,413 4,654 72,526 3,293
Natural Gas MWh 127,364 122,701 130,909 141,253 156,693
Liquid crystal Tons 100.01 94.2 103.4 103.6 101.5
Aluminum/copper etching solutions (Note 1)
 
Tons 19,280.6 19,003.7 20,051.6 22,104.2 24,684.0
Developer Tons 21,294.3 21,404.9 24,200.1 21,969.3 21,678.3
Stripper Tons 6,647.2 14,237.8 17,532.4 19,735.9 30,261.0
Thinner Tons 15,048.3 6,051.6 7,221.9 6,648.6 6,200.1
Photoresist Tons 7,190.7 6,221.5 6,491.4 7,197.4 6,776.2
Greenhouse gas emissions Scope 1 Million tCO2e 0.439 0.455 0.436 0.369 0.350
Scope 2 Million tCO2e 2.804 2.615 3.034 3.232 3.169
Scope 3 Million tCO2e 0.018 0.025 0.022 0.014 0.010
Wastewater discharge Wastewater volume Tons 19,822,541 17,891,774 19,398,443 16,018,051 14,307,030
Chemical oxygen demand Tons 1,778.5 2,101.7 2,137.7 1,619.1 1393
Biochemical oxygen demand Tons 556.4 708.5 829.7 601.4 490
 
Suspended solids
Tons 867.6 679.3 1,127.0 653.6 665
Water recycling Rate of water recycling throughout production processes % 94.2 95.4 95.4 96.2 96.7
Volume of water recycled from production processes
 
Tons 235,957,877 237,898,589 288,678,559 271,591,031 274,147,277
Waste disposal Total Waste volume Tons 97,694 98,556 116,128 104,710 113,301
Hazardous waste Tons 68,476 31,951 32,420 28,422 25,982
Ordinary waste Tons 29,218 66,605 83,709 76,288 87,319
Air pollutant emissions  
VOCs
Tons 104.7 158.2 157.8 136.1 122.72
Sulfur oxides Tons 42.3 46.2 38.3 44.9 30.79
Nitrogen oxides Tons 15.8 15.3 20.2 26.3 26.50
Note 1: The figures for 2015 to 2017 only refer to aluminum etching solutions; the figure for 2018 refers to aluminum/copper etching solutions