Fiscal 2021 Environmental Performance Data

Environmental Preservation

Fiscal 2021 Environmental Performance Data

Updated in October 2022

Fiscal 2021 Environmental Performance Data

Production volume and energy consumption intensity

The energy intensity in fiscal 2021 has recovered from the production cuts caused by the COVID-19 pandemic, but hydroelectric power generation has decreased due to the impact of natural disasters and facility stoppages due to construction work, resulting in a deterioration compared to the previous fiscal year.In fiscal 2022, we will continue to focus on achieving our medium-term targets by continuing energy conservation at each manufacturing plant and highly efficient operation of power plants.

Production volume and energy consumption intensity
Fiscal Year	2013	2014	2015	2016	2017	2018	2019	2020	2021	2021	2022
	result	result	result	result	result	result	result	result	target	result	target
Production Voume	1.00	0.98	0.95	0.92	1.00	0.94	0.94	0.83	1.03	0.93	1.00
Energy consumption intensity	1.00	0.99	0.95	0.95	0.91	0.94	0.90	0.94	0.89	0.95	0.91

Production volume and energy consumption intensity

CO₂ emissions intensity

In fiscal 2021, we have recovered from the reduction in production due to the corona crisis, butHydroelectric power generation decreased due to the impact of facility stoppages due to construction work, and the CO₂ emission intensity worsened compared to the previous fiscal year.In fiscal 2022, we will continue to focus on achieving our medium-term targets by continuing energy conservation at each manufacturing plant and highly efficient operation of power plants.

CO₂ emissions intensity
Fiscal Year		2013	2014	2015	2016	2017	2018	2019	2020	2021	2021	2022
	Unit	result	result	result	result	result	result	result	result	target	result	target
CO₂ emission intensity	t-CO₂/t-CaC₂	1.24	1.25	1.17	1.18	1.12	1.14	1.06	1.10	1.04	1.11	1.08
CO₂ emission intensity index	%	100	101	95	95	90	92	85	88	84	89	87

CO2 emissions intensity

CO₂ emissions

In fiscal 2021, we recovered from the production cuts caused by the corona crisis, and our CO₂ emissions increased significantly.In fiscal 2022, we will continue to focus on reducing emissions by continuing energy conservation at each manufacturing plant and highly efficient operation of power plants.

CO₂ emissions
Fiscal Year		2017	2018	2019	2020	2021	2022
	Unit	result	result	result	result	result	target
From energy sources	thousand tons	1,207	1,147	1,073	980	1,116	1,169
From non-energy sources	thousand tons	970	889	891	772	853	917

CO₂ emissions

CO2 emissions

PRTR Substances emissions

In FY2021, there was a slight increase due to an increase in production volume, etc., but we will continue to make systematic efforts to reduce emissions, mainly to reduce emissions into the atmosphere.

PRTR Substances emissions
Fiscal Year		2017	2018	2019	2020	2021	2022
	Unit	result	result	result	result	result	target
Denka	tons	78	77	78	68	83	75
Affliates	tons	8	7	8	8	11	11

PRTR Substances emissions

Final Disposal Amount and Waste Emission Ratio

From fiscal 2020, Gosen Site (formerly Denka Seiken) joined Denka's non-consolidated business sites from domestic affiliates, and as a result of processing waste in the cement kiln at the Omi Plant, the Group's overall emission rate remained at a low level.

Final Disposal Amount and Waste Emission Ratio
Fiscal Year			2017	2018	2019	2020	2021	2022
		Unit	result	result	result	result	result	target
Denka	Amount of waste generated	tons	112,980	121,433	110,265	103,104	120,927	109,086
Denka	Amount of final landfill waste	tons	88	49	42	73	63	55
Denka	Emissions ratio		0.08%	0.04%	0.04%	0.07%	0.05%	0.05%
Domesic affliats	Emissions ratio	tons	1,310	1,854	1,362	538	549	485
Domesic affliats	Amount of final landfill waste	tons	108	196	161	43	38	25
Group's total	Amount of waste generated	tons	114,290	123,287	111,627	103,642	121,476	109,571
Group's total	Amount of final landfill waste	tons	196	245	203	116	101	80
Group's total	Emissions ratio	％	0.17%	0.20%	0.18%	0.11%	0.08%	0.07%

* Emissions ratio (%) = amount of final landfill waste / amount of waste generated x 100
* In Denka’s definition, “zero emissions” means an emission ratio lower than 1%.

Final Disposal Amount and Waste Emission Ratio

SOx emissions

In 2021, various sites and plants were generally as usual.

SOx emissions
Fiscal Year		2017	2018	2019	2020	2021	2022
	Unit	result	result	result	result	result	target
Denka	tons	44	47	43	41	46	44
Affliates	tons	83	105	110	149	132	149

SOx emissions

Soot and dust emissions

In FY2021, the filter cloth performance of the coke dryer temporarily deteriorated, but after replacing the filter cloth, the amount of emissions returned to the same level as in previous years.

Soot and dust emissions
Fiscal Year		2017	2018	2019	2020	2021	2022
	Unit	result	result	result	result	result	target
Denka	tons	65	81	76	66	109	67
Affliates	tons	25	26	16	17	14	17

Soot and dust emissions

NOx emissions

In fiscal 2021, cement kiln operating hours were shorter than in the previous fiscal year, and emissions decreased.Emissions are expected to increase in fiscal 2022 due to improved operating rates, but we will continue to strive to reduce emissions by optimizing operations.

NOx emissions
Fiscal Year		2017	2018	2019	2020	2021	2022
	Unit	result	result	result	result	result	target
Denka	tons	4,365	4,037	3,751	3,685	3,393	4,063
Affliates	tons	931	777	584	632	827	817

NOx emissions

COD(BOD) emissions

In fiscal 2021, in addition to reducing the production of some products at the Omi Plant, the reduction effect was maintained by improving the wastewater treatment facility (started operation in February 2016).

COD(BOD) emissions
Fiscal Year		2017	2018	2019	2020	2021	2022
	Unit	result	result	result	result	result	target
Denka	tons	326	234	196	178	181	229
Affliates	tons	8	7	6	6	6	6

COD(BOD) emissions

Water used

Denka
Fiscal year	2017 results	2018 results	2019 results	2020 results	2021 results	2022 target
Water used (km³)	57,259	59,424	56,852	54,369	58,257	59,953
	7 bases			8 bases

Domestic and overseas affiliates
Fiscal year	2017 results	2018 results	2019 results	2020 results	2021 results	2022 target
Water used (km³)	2,961	2,778	2,568	56,067	50,464	50,520
	15 bases		16 bases	17 bases

Group's total
Fiscal year	2017 results	2018 results	2019 results	2020 results	2021 results	2022 target
Water used (km³)	60,220	62,202	59,420	110,436	108,721	110,473
	22 bases		23 bases	25 bases

Breakdown of emissions and transfers in fiscal 2021

The following table shows PRTR substances emitted and transferred exceeding one ton.

PRTR Substances	No.	Emissions					Amount transferred (to the outside)
PRTR Substances	No.	Air	Water	Soil	Landfill	Total	Amount transferred (to the outside)
n-butyl acrylate	7	0	0	0	0	0	2
Acrylonitrile	9	0	0	0	0	0	3
Acetaldehyde	12	0	9	0	0	9	0
Aniline	18	0	0	0	0	0	2
Ethyl benzene	53	3	0	0	0	3	26
Ferric chloride	71	0	0	0	0	0	71
Vinyl acetate	134	1	0	0	0	1	0
N,N-Dimethylacetamide	213	0	0	0	0	0	1
N,N-Dimethylformamide	232	0	0	0	0	0	10
Styrene	240	21	0	0	0	21	71
Water soluble copper salt	272	0	4	0	0	4	0
Toluene	300	16	0	0	0	16	52
Hydrogen fluoride and its water-soluble salt	374	2	0	0	0	2	39
n-Hexane	392	0	0	0	0	0	1
Bezne	400	0	0	0	0	0	4
Boron and its compounds	405	0	15	0	0	15	8
maleic anhydride	414	0	0	0	0	0	2
Methyl methacrylate	420	5	0	0	0	5	10
Total (tons/year)		49	28	0	0	77	303
Dioxin (mg-TEQ/year)	243	151	62	0	0	213	14

Scope of Calculation for Fiscal 2021 Results

Environmental Performance Data	Omi Plant,Omuta plant,Chiba Plant,Shibukawa Plant,Ofuna Plant,Isesaki Plant,Gosen Site *1	Denka Innovation Center	Non-manufacturing sectors (Head Office, branches, etc.)	Domestic affiliates (6)	Overseas business bases (11)
Environmental Performance Data		Denka Innovation Center	Non-manufacturing sectors (Head Office, branches, etc.)	Denka Polymer, Denka Elastlution, Hinode Kagaku Kogyo, Denka Azumin, Kyusyu Plastic, Denka Astec *2	Merbau, Denka Singapore, Seraya, Denka Singapore, Tuas, Deanka Advantech, South, Denka Advantech, Denka Advanced Materials, Suzhou, Denka Chemicals Development Suzhou, Denka Inorganic Materials, Tianjin, Denka Electronics Materials Dalian, Denka Advanced Materials Vietnam, Denka Construction Solutions Malaysia, Denka Performance Elastomer
Overview of Environmental Impacts	○	○	○	–	–
Environmental Accounting	○	○	–	–	–
Production Volume and Energy Consumption Intensity	○	○	○	–	–
CO₂ Emissions Intensity (from energy sources)	○	○	○	–	–
CO₂ Emissions (from energy and non-energy sources)	○	○	○	–	–
PRTR Substances emissions	○ Note: Excluding emissions from Toyo Styrene and Taiyo Vinyl Corporation operating on the Chiba Plant’s premises	○	–	○	–
Final Disposal Amount and Waste Emission Ratio	○ Note: Excluding emissions from Toyo Styrene and Taiyo Vinyl Corporation operating on the Chiba Plant’s premises	○	–	○	–
SOx (sulfur oxide) emissions	○	○	–	○	○
NOx (nitrous oxide) emissions	○	○	–	○	○
Soot and dust emissions	○	○	–	○	○
COD (BOD) emissions	○	○	–	○	○
Water used	○	○	–	○	○
Environment performance data Ratio of main emissions and usage	○	○	–	○	○

*1 Including emissions from affiliates operating on the premises of seven domestic Denka plants: Denal Silane Co., Ltd., and Denak Co., Ltd. at Omi Plant, ; Toyo Styrene Co., Ltd., and Taiyo Vinyl Corp. at Chiba Plant
*2 For the results from fiscal 2020 onward, emissions from Nakagawa Techno Industrial Co., Ltd. are included (change of name to Denka Astec Co., Ltd. in April 2021)
The performance data of other Group companies will be added to the total number of sites after investigating the status of their calculations.

デンカ株式会社, デンカ株式会社　IR室

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