The energy consumption intensity in fiscal 2019 was 90% of the fiscal 2013 level, continuing to improve at least 1% on an annual average basis. The fiscal 2020 figure is the initial target in the medium-term plan and includes the expected increase in production volume (excludes the impact of COVID-19). By implementing ongoing measures aimed at reducing energy consumption of each manufacturing site and enhancing the efficiency of in-house power generation, we will engage in more effective energy-saving initiatives.
In fiscal 2019, the CO2 emissions intensity index attributable to energy sources improved due to an increase in in-house hydroelectric energy and an improvement in the CO2 emissions intensity index of purchased electricity (Kyushu). In fiscal 2020, we will continue striving to improve our emissions intensity index through the operation of cogeneration facilities and energy conservation in our main products.
| Fiscal year | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | |
|---|---|---|---|---|---|---|---|
| Unit | Results | Results | Results | Results | Results | Target | |
| From energy sources | Thousand tons | 1,203 | 1,171 | 1,207 | 1,147 | 1,073 | 1,185 |
| From non-energy sources | Thousand tons | 904 | 916 | 970 | 889 | 881 | 927 |
CO2 emissions
In fiscal 2019, the CO2 emissions attributable to energy sources decreased due to an increase in in-house hydroelectric energy and an improvement in the CO2 emissions intensity index of purchased electricity (Kyushu). In fiscal 2020, we will continue striving to reduce emissions through the operation of cogeneration facilities and energy conservation in our main products.
We will endeavor to reduce emissions in a systematic manner with a focus on reducing emissions into the atmosphere.
| Fiscal year | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | |
|---|---|---|---|---|---|---|---|
| Unit | Results | Results | Results | Results | Results | Target | |
| Denka | tons | 74 | 87 | 78 | 77 | 78 | 74 |
| Affiliates | tons | 3 | 4 | 8 | 7 | 8 | 7 |
PRTR Substances
On a non-consolidated basis, our efforts to reduce the final disposal amount of waste are ongoing, but as a result of adding a Malaysian company to the scope of overseas affiliates, on a Group basis, the final disposal amount of waste increased in fiscal 2019. Through the separation of waste and in collaboration with the mother factory in Japan and relevant departments, we will endeavor to reduce the amount of waste generated and promote recycling, and continue to achieve zero emissions as a Group.
| Fiscal year | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | ||
|---|---|---|---|---|---|---|---|---|
| Unit | Results | Results | Results | Results | Results | Target | ||
| Denka | Amount of waste generated | tons | 120,286 | 109,650 | 112,980 | 121,433 | 110,265 | 110,671 |
| Denka | Amount of final landfill waste | tons | 153 | 119 | 88 | 49 | 42 | 95 |
| Denka | Emissions ratio | 0.13% | 0.11% | 0.08% | 0.04% | 0.04% | 0.09% | |
| Domestic affiliate | Amount of waste generated | tons | 1,259 | 1,210 | 1,310 | 1,584 | 1,360 | 1,412 |
| Domestic affiliate | Amount of final landfill waste | tons | 92 | 89 | 108 | 196 | 161 | 154 |
| Overseas affiliates | Amount of waste generated | tons | 2,589 | 2,607 | 2,663 | 2,317 | 2,454 | 2,936 |
| Overseas affiliates | Amount of final landfill waste | tons | 285 | 268 | 346 | 285 | 630 | 662 |
| Group’s total | Amount of waste generated | tons | 124,134 | 113,467 | 116,953 | 125,334 | 114,079 | 115,019 |
| Total of affiliates | Amount of final landfill waste | tons | 377 | 357 | 454 | 481 | 791 | 816 |
| Group’s total | Amount of final landfill waste | tons | 530 | 476 | 542 | 530 | 833 | 911 |
| Group’s total | Emissions ratio | ％ | 0.43% | 0.42% | 0.46% | 0.42% | 0.73% | 0.79% |
Waste emissions ratio
Although there is a variation in emissions due to changes in fuel and other factors, the amount of emissions has remained almost unchanged in fiscal 2019.
| Fiscal year | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | |
|---|---|---|---|---|---|---|---|
| Unit | Results | Results | Results | Results | Results | Target | |
| Denka | tons | 54 | 65 | 44 | 47 | 43 | 44 |
| Affiliates | tons | 77 | 75 | 84 | 106 | 111 | 87 |
SOx
Emissions in fiscal 2019 decreased due to changes in fuel and repairs to dust collectors at affiliates.
| Fiscal year | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | |
|---|---|---|---|---|---|---|---|
| Unit | Results | Results | Results | Results | Results | Target | |
| Denka | tons | 88 | 61 | 65 | 81 | 76 | 67 |
| Affiliates | tons | 10 | 15 | 16 | 16 | 7 | 7 |
Soot and dust
In fiscal 2019, emissions decreased due to reduced production of certain products.
In fiscal 2020, we will endeavor to reduce emissions by optimizing operations, etc.
| Fiscal year | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | |
|---|---|---|---|---|---|---|---|
| Unit | Results | Results | Results | Results | Results | Target | |
| Denka | tons | 4,148 | 4,192 | 4,365 | 4,037 | 3,751 | 4,103 |
| Affiliates | tons | 700 | 760 | 840 | 679 | 492 | 558 |
NOx
While there was a reduction in fiscal 2019 due to reduced production of certain products at the Omi Plant, the reduction effect from improvement of the wastewater treatment facility (started to operate in February 2016) has been maintained. (The fiscal 2020 target is the figure in the medium-term plan.)
| Fiscal year | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | |
|---|---|---|---|---|---|---|---|
| Unit | Results | Results | Results | Results | Results | Target | |
| Denka | tons | 578 | 358 | 326 | 234 | 178 | 262 |
| Affiliates | tons | 9 | 7 | 8 | 7 | 6 | 7 |
COD（BOD）
| Fiscal 2015 results | Fiscal 2016 results | Fiscal 2017 results | Fiscal 2018 results | Fiscal 2019 target | Fiscal 2020 results | |
|---|---|---|---|---|---|---|
| Water used (km3) | 66,539 | 61,752 | 57,259 | 59,424 | 56,853 | 60,053 |
| 7 bases | 8 bases | |||||
| Fiscal 2016 results | Fiscal 2017 results | Fiscal 2018 results | Fiscal 2019 target | Fiscal 2020 target | |
|---|---|---|---|---|---|
| Water used (km3) | 2,691 | 2,961 | 2,778 | 2,568 | 2,359 |
| 14 bases | 15 bases | 16 bases | 15 bases | ||
| Fiscal 2016 results | Fiscal 2017 results | Fiscal 2018 results | Fiscal 2019 target | Fiscal 2020 target | |
|---|---|---|---|---|---|
| Water used (km3) | 64,443 | 60,220 | 62,202 | 59,421 | 62,412 |
| 21 bases | 22 bases | 23 bases | |||
The following table shows PRTR substances emitted and transferred exceeding one ton.
| PRTR Substances | No. | Emissions | Amount transferred (to the outside) |
||||
|---|---|---|---|---|---|---|---|
| Air | Water | Soil | Landfill | Total | |||
| Ethyl acrylate | 3 | 2 | 0 | 0 | 0 | 2 | 0 |
| n-Butyl acrylate | 7 | 0 | 0 | 0 | 0 | 0 | 1 |
| Acrylonitrile | 9 | 3 | 0 | 0 | 0 | 3 | 13 |
| Acetaldehyde | 12 | 0 | 4 | 0 | 0 | 4 | 0 |
| Aniline | 18 | 0 | 0 | 0 | 0 | 0 | 3 |
| Ethyl benzene | 53 | 3 | 0 | 0 | 0 | 3 | 28 |
| Ferric chloride | 71 | 0 | 0 | 0 | 0 | 0 | 60 |
| Calcium cyanamide 60% | 77 | 0 | 0 | 0 | 0 | 0 | 3 |
| Vinyl acetate | 134 | 3 | 0 | 0 | 0 | 3 | 0 |
| N,N-Dimethylformamide | 232 | 0 | 0 | 0 | 0 | 0 | 17 |
| Styrene | 240 | 19 | 0 | 0 | 0 | 19 | 100 |
| Water soluble copper salt | 272 | 0 | 5 | 0 | 0 | 5 | 0 |
| Toluene | 300 | 15 | 0 | 0 | 0 | 15 | 37 |
| Hydrogen fluoride and its water-soluble salt | 374 | 2 | 2 | 0 | 0 | 3 | 40 |
| n-Hexane | 392 | 0 | 0 | 0 | 0 | 0 | 1 |
| Benzene | 400 | 0 | 0 | 0 | 0 | 0 | 9 |
| Boron and its compounds | 405 | 0 | 14 | 0 | 0 | 14 | 12 |
| Methyl methacrylate | 420 | 3 | 0 | 0 | 0 | 3 | 10 |
| Total (tons/year) | 51 | 24 | 0 | 0 | 75 | 335 | |
| Dioxin (mg-TEQ/year) | 243 | 129 | 31 | 0 | 0 | 161 | 2 |
| Environmental Performance Data | Denka’s six domestic plants *1 | Denka Innovation Center | Non-manufacturing sectors (Head Office, branches, etc.) | Domestic affiliates (6) | Overseas business bases (9) |
|---|---|---|---|---|---|
| Denka Polymer, Denka Seiken, Denka Elastlution, Hinode Kagaku Kogyo, Denka Azumin and Kyusyu Plastic*2 | Merbau, Seraya, Tuas, Tuas South, Suzhou (Denka Advanced Materials and Denka Chemicals Development), Tianjin, Dalian and Vietnam, Malaysia | ||||
| Overview of Environmental Impacts | ○ | ○ | – | – | – |
| Environmental Accounting | ○ | ○ | – | – | – |
| ①Production Volume and Energy Consumption Intensity | ○ | – | ○ | – | – |
| ②CO2 Emissions Intensity (from energy sources) | ○ | ○ | ○ | – | – |
| ②CO2 Emissions | ○ | ○ | ○ | – | – |
| ③Emissions of PRTR Substances | ○ Note: Excluding emissions from Toyo Styrene and Taiyo Vinyl Corporation operating on the Chiba Plant’s premises |
○ | – | ○ | – |
| ④Final Disposal Amount and Waste Emission Ratio | ○ Note: Excluding emissions from Toyo Styrene and Taiyo |
○ | – | ○ | ○ |
| ⑤SOx | ○ | ○ | – | ○ | ○ |
| ⑥NOx | ○ | ○ | – | ○ | ○ |
| ⑦Soot and dust | ○ | ○ | – | ○ | ○ |
| ⑧COD(BOD) | ○ | ○ | – | ○ | ○ |
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