Reducing Discharge of Chemical Substances

Goals and Achievements of Major Initiatives

Objectives of initiatives Goals for fiscal year 2017 Achievements in fiscal year 2017 Evaluation Goals for fiscal year 2018
Reduce VOC emissions into the air. • Reduce VOC emissions into the air.
• Establish reduction targets for individual domestic sites and promote related initiatives (cumulative total of targets for domestic production facilities: 376 metric tonnes (-2.3% from fiscal year 2016)).
DIC Group (Japan): Total emissions of 371 metric tonnes (-3.6% from fiscal year 2016). ★★★ • Reduce VOC emissions into the air.
• Establish reduction targets for individual domestic sites and promote related initiatives (cumulative total of targets for domestic production facilities: 357 metric tonnes (-3.7% from fiscal year 2017)).
  • Evaluations are based on self-evaluations of current progress. Key: ★★★ = Excellent; ★★ = Satisfactory; ★ = Still needs work

Basic Approach

other industries, they must be extremely vigilant to prevent discharges of such substances into the environment. DIC has worked to reduce emissions into the air, water and soil of substances designated under the Pollutant Release and Transfer Register (PRTR) and of substances targeted under a voluntary scheme created by the JCIA since fiscal year 2000, while other DIC Group companies in Japan have done so since fiscal year 2005.

  • *The JCIA is a general incorporated association. As one of Japan’s major industry organizations, JCIA is a member of the International Council of Chemical Associations and pursues the healthy development of the chemical industry with other chemical-industrial organizations around the world.

Principal Initiatives in Fiscal Year 2017

1.Reducing Emissions of VOCs

Emissions of Targeted Chemical Substances into the Air (551 Substances, Including those Designated by the PRTR, and One Substance Group)
Emissions of Targeted Chemical Substances into the Air (551 Substances, Including those Designated by the PRTR, and One Substance Group)

Having succeeded in achieving a voluntary target—set in fiscal year 2007—for reducing emissions of VOCs into the air of 30% by fiscal year 2010 (using fiscal year 2000 as the base year) for the DIC Group in Japan, domestic Group companies continue to pursue steady annual reductions through facility improvements and emissions management.
In fiscal year 2017, emissions of VOCs into the air by DIC totaled 177 metric tonnes, a decrease of 6.3% from fiscal year 2016, while those by the DIC Group in Japan, at 371 metric tonnes, were down 3.6%. The principal factor behind these results was the fact that reduction initiatives at the Saitama Plant have become firmly ingrained in everyday operations.
Overseas, Group companies in Greater China and the Asia–Pacific region continued to promote ongoing emissions reductions. In the PRC, in particular, the Group is updating facilities and stepping up management practices in response to the tightening of local regulations governing the emissions of VOCs.

Emissions of VOCs into the Air in Fiscal
Year 2017

Number of Targeted Chemical Substances Used and/or
Produced in Amounts Exceeding 1.0 Metric Tonne in Fiscal Year 2017

In fiscal year 2017, the DIC Group monitored discharges of 462 class-1 chemical substances designated under the PRTR and of 89 PRTRdesignated chemical substances (other than class-1 substances) and one substance group (chain hydrocarbons with up to 4–8 carbon atoms) targeted by the JCIA*. During the period, DIC and DIC Group companies in Japan produced or used 110 and 123 of these substances, respectively, in units exceeding 1.0 metric tonne.

  • In 2014, the JCIA reviewed PRTR-designated chemical substances and revised the number of substances on its target list from 105 to 89.

Environmental Emissions of Targeted Chemical Substances(551 Substances, Including those Designated by the PRTR, and One Substance Group) in Fiscal Year 2017

DIC Emissions into the air 177metric tonnes
Emissions into water 25metric tonnes
Emissions into soil 0metric tonnes
DIC Group (Japan) Emissions into the air 371metric tonnes
Emissions into water 25metric tonnes
Emissions into soil 0metric tonnes

Targeted Chemical Substances for Which Emissions Exceeded 10.0 Metric Tonnes in Fiscal Year 2017

Substance DIC DIC Group (Japan)
Emissions
into the environment
Emissions
into the environment
Ethyl acetate 68metric tonnes 125metric tonnes
Methyl ethyl ketone 24metric tonnes 48metric tonnes
Toluene 39metric tonnes 46metric tonnes
Styrene 7metric tonnes 39metric tonnes
Acetone 6metric tonnes 35metric tonnes
Propyl alcohol 4metric tonnes 21metric tonnes
N-methylpyrrolidone 13metric tonnes 13metric tonnes
Butyl acetate 0metric tonnes 11metric tonnes

2.Managing Water Resources

Water risk map
Water risk map

Usable fresh water on the earth’s surface is said to account for only around 0.01% of the planet’s total fresh water resources. Accordingly, finding effective ways to conserve and manage water resources is a crucial global challenge. The DIC Group withdraws fresh water (tap water and industrial water) for use in production processes and air conditioning and for drinking, among others. The Group also discharges wastewater—after purifying it in line with internal standards that exceed official standards in the countries and territories where it has operations—into rivers and other fresh water bodies. In Japan, the Central Research Laboratories, in Chiba Prefecture, recovers purified wastewater (graywater) and reuses it on-site in research, as a result of which it currently discharges no wastewater. The Group also promotes the recycling and reuse of water to reduce its impact on water resources.
In fiscal year 2017, the Group continued to promote efforts to improve production processes, share information and centralize data on fresh water withdrawn, water used and wastewater discharged. Fresh water withdrawn by the global DIC Group in the period edged down 0.5% from the fiscal year 2016 level, to 41,308,000 ㎥, comprising withdrawals by the Group in Japan (including the parent company) of 32,327,000 ㎥, up 5.9%, and by Group companies overseas of 8,981,000 ㎥, down 18.5%. Wastewater discharged by the global DIC Group in fiscal year 2017 rose 3.3%, to 38,822,000 ㎥.
Effective from fiscal year 2017, the Group adopted the GRI’s guideline for collecting data on water withdrawn* and used its water risk assessment tool to analyze initial water risk at 38 sites worldwide, which account for 75.0% of its global production. With the aim of enhancing its ability to manage water resources, the Group also commenced a review of the status of water recycling efforts. Looking ahead, the Group will continue working to enhance initiatives designed to help protect and ensure the effective use of precious water resources.

  • *Included in the GRI’s G4 Sustainability Reporting Guidelines.

TOPICS Siam Chemical Industry Promotes the Recycling of Wastewater

Siam Chemical Industry Promotes the Recycling of Wastewater

Siam Chemical Industry uses approximately 243 ㎥ of water resources per day, with 45%—around 109 ㎥—used in manufacturing and 55%—approximately 135 ㎥—discharged as wastewater. Using a water recycling facility, the company has endeavored to treat and reuse this wastewater. In fiscal year 2016, the company installed a cleaning tower capable of recycling 20 ㎥ per hour, as a result of which it currently recycles 40–50 ㎥ of wastewater daily. Looking ahead, the company will continue promoting initiatives aimed at advancing the recycling of water resources.

Scope of Reporting for the Withdrawal of Fresh Water and the Discharge of Wastewater

DICグループ全体の総取水/総排水量

Beginning in fiscal year 2017, the DIC Group has adopted a new format that calls for gathering data on the withdrawal of fresh water by source and the discharge of wastewater by destination. With this change, the Group also started calculating water recycled, but difficulties with measurement and data collection prevented a calculation of the total volume. Going forward, the Group will take steps to ensure the accuracy of this calculation.

Fresh water withdrawn (1,000 ㎥)/Wastewater discharged (1,000 ㎥)

3.Soil and Groundwater Pollution Studies

Japan’s Water Pollution Control Act was revised in 2012 to tighten structural standards governing equipment installed to prevent groundwater contamination by chemical substances. In addition to complying strictly with this Act and with the Soil Contamination Countermeasures Act, the DIC Group in Japan implements soil and groundwater surveys and countermeasures as necessary and assesses related environmental and safety risks.

4.Reducing SOx, NOx and COD

SOx and NOx Emissions Volumes
SOx and NOx Emissions Volumes

COD
COD

Taking fiscal year 1990 as the base year, DIC Group companies in Japan have worked to reduce sulfur oxide (SOx) and nitrogen oxide (NOx) emissions—key causes of acid rain—from boilers. The Group is also working to reduce chemical oxygen demand (COD), an indicator of water quality deterioration in wastewater, thereby enhancing its water quality management.
Overseas, Group companies are also switching fuel from diesel to natural gas and replacing diesel-fired and heavy oil–fired boilers with waste wood–fired biomass boilers at sites with appropriate infrastructure. To reduce COD, the Group is promoting the reuse of water and installing environment-friendly closed-loop recycling and wastewater treatment systems at its sites that purify water to a level that exceeds the legally mandated level.

5.Complying with Regulations Governing Emissions of Dioxins

In Japan, the DIC Group monitors emissions of dioxins from waste incinerators that produce these byproducts, a group of compounds with varying toxicities. At present, the Group has six such facilities. Continuous efforts to reduce emissions levels have enabled the Group to achieve results that greatly surpass standards specified in the Law Concerning Special Measures Against Dioxins.

Dioxin Emissions from DIC Group Incinerators in Japan

Site Scale of facility (incinerating capacity) Waste gas Wastewater
Standard
(ng-TEC/Nm³)
Emissions reported in fiscal
year 2016
(ng-TEC/Nm³)
Standard
(pg-TEC/Nm³)
Emissions reported in fiscal
year 2016
(pg-TEC/Nm³)
Chiba Plant (DIC) Approx. 3 metric tonnes/hr 5 0.019 10 0.03
Hokuriku Plant (DIC) 0.28 metric tonnes/hr 5 0.00016 10 0.003
DIC Interior Co., Ltd. Approx. 0.1metric tonnes/hr 10 0.21 NA -
Hokkaido Plant
(DIC Kitanihon Polymer Co., Ltd.)
Approx. 0.2 metric tonnes/hr 10 0.05 NA -
Tohoku Plant
(DIC Kitanihon Polymer Co., Ltd.)
Approx. 0.2 metric tonnes/hr 10 0.030 NA -
Harima Plant
(Seiko PMC Corporation)
Approx. 0.2 metric tonnes/hr 10 0.75 NA -

TOPICS DIC’s Kashima Plant installs anaerobic wastewater treatment system

Anaerobic wastewater treatment system, BIOIMPACT®, installed in Kashima Plant
Anaerobic wastewater treatment system, BIOIMPACT®, installed in Kashima Plant

DIC’s Kashima Plant is promoting efforts to increase its wastewater treatment capacity and conserve energy. With the aim of enlarging its wastewater treatment facilities, DIC’s Kashima Plant recently installed a BIOIMPACT® expanded granular sludge blanket (ESGB) anaerobic wastewater treatment system. This system is manufactured by Sumitomo Heavy Industries Environment Co., Ltd.
Conventional chemical wastewater treatment systems are aerobic, i.e., require oxygen. In aerobic wastewater treatment systems, activated sludge* is used to break down organic matter in wastewater into CO2 and water. In contrast, the BIOIMPACT® system uses ESGB, a newly commercialized anaerobic process whereby wastewater is flowed into a tank containing a dense blanket of sludge granules (aggregates of anaerobic microorganisms), which rapidly break down organic matter into methane and CO2. This innovative system, which also facilitates the reuse of methane produced for plant operation, is attracting considerable attention for its various performance features, which include superb efficiency and minimal space and energy requirements. The Kashima Plant expects the new system to reduce its annual emissions of CO2 by 720 tons, as well as to significantly lower its operating costs.

TOPICS Advanced Initiatives in the PRC Earn DIC Green Enterprise Certification

Green Enterprise certificate
Green Enterprise certificate

The PRC is reinforcing regulations pertaining to chemical substances with the aim of balancing economic growth and environmental protection. It is against that backdrop that 20 DIC Group companies in the PRC have promoted improvements in their own practices for handling chemical substances based on the Group’s environmental management system to reduce chemical substance emissions, water intake and discharge, waste disposal and energy consumption and have submitted data annually to the relevant authorities.
These highly transparent initiatives have garnered considerable praise. In June 2012, Nantong DIC Color Co., Ltd., which manufactures organic pigments and printing inks, was certified as a Green Enterprise by the Nantong City Environmental Protection Committee, a designation recognizing companies with environment-friendly business practices. As a consequence, Nantong DIC Color is now seen as a model chemicals plant.

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