Environmental ActivitiesInternal Change

Basic Approach

In terms of "internal change," efforts are directed toward reducing the environmental burden caused by all Kurita Water Industries worksites and its domestic Group companies. The following discusses actual results for fiscal 2017 and targets for fiscal 2018.

Results in Fiscal 2017

Per-Unit Energy Consumption

Category Target for the fiscal 2017 Result in the fiscal 2017
Production sites*1 Average annual decline of 1% since fiscal 2013 2.7% reduction
Non-production sites*2 1% year-on-year decline 0.8% reduction

Energy Consumption (Crude Oil Equivalent)

*As for energy use, for one location involved in the ultrapure water supply project when monthly power use is calculated was changed starting for fiscal 2014, and steam use, which was omitted from statistics when facilities were expanded in fiscal 2016, was added, resulting in revisions to figures reported for September 2017 and before.

CO2 Emissions

*CO2 emissions are calculated from energy use (electricity, crude oil, etc.) using a conversion factor. Furthermore, the approach used for supply chain emissions was to use scope 1 and 2, but starting with this report, scope 3 was added, resulting in revisions to figures reported for September 2017 and before.

Kurita Water Industries Ltd. and its domestic Group companies set targets for per-unit energy consumption*3 for worksites and companies in line with the spirit of the Act on the Rational Use of Energy (Energy Conservation Act) and work to lower the figure. As for the main efforts during fiscal 2017, production sites not only reduced their use of heating fuel and cooling water by revising how facilities that undertake high-temperature treatment of waste fluids operate and making them more efficient but also cut electricity and fuel use by switching facilities to LED lighting and high-efficiency boilers. Because of these measures, the per-unit energy consumption target was achieved. On the other, at non-production sites, measures such as restricting use of facilities after 10:00 p.m. at the Company’s offices and promoting casual, cool business attire during summer for domestic Group companies, too, were implemented, but it was not possible to archive the targets.

Furthermore, at Kurita Global Technology Center, the Company’s development facilities, solar power equipment was installed, and this equipment generated 49,537 kWh in fiscal 2017.

  • *1Group companies designated businesses under the Energy Conservation Act, Kurita Water Industries’energy management designated plants, and Companies and sites manufacturing water treatment chemicals and facilities
  • *2Non-production sites: Kurita Group companies and sites other than those listed above
  • *3The value calculated by dividing energy consumption by production quantity, total floor area or other value closely associated with energy consumption

Waste Reduction and Increase of Recycling Rate

Item Targets for fiscal 2017
(Based on results in fiscal 2017)
Results in fiscal 2017
Waste generation Below 33,756 t 27,538 t
Breakdown C Production sites*4 Below 32,044 t 25,687 t
D Production sites*5 Below 1,462 t 1,550 t
Non-production sites*6 Below 250 t 302 t
Recycling rate 90.5% or more 89.9%
Breakdown C Production sites 91.8% or more 92.1%
D Production sites 72.9% or more 67.3%
Non-production sites 48.9% or more 42.7%
  • *4Kurita Group companies and sites where the amount of waste generated is influenced by the production activities of specific customers
  • *5Kurita Group companies and sites engaged in R&D and the manufacture of water treatment chemicals and water treatment facilities
  • *6Kurita Group companies and sites other than those listed above

Trends in Waste Generation and Recycling Rate*7

We cut waste volumes substantially compared to the previous fiscal year, achieving our targets. The main factor in this achievement was the reduction of substances of environmental concern contained in wastewater emitted from customers’ plants at some ultrapure water supply sites.

The recycling rate target was not achieved due to the fact that all the waste reduced at the abovementioned ultrapure water supply sites was subject to recycling and the fact that the volume of waste increased with a revision of wastewater standards to comply with environmental laws at a production site.

Activity Case

Reducing the Environmental Burden of Kurita Water Industries’ Shizuoka Plant

Kurita Water Industries’ Shizuoka plant was opened in 1996 as a design and production base for the water treatment facilities business. On the plant grounds there is an office building, small water processing system plant, plant for regenerating ion-exchange resin collected from customers’ plants, and a plant for producing high-performance ion-exchange resins* 2 for next-generation grade ultrapure water* 1 and high-performance membranes. Including workers from partner companies, about 260 people work at the plant, which has a relatively heavy environmental burden for the Kurita Group— this includes energy, such as power used at the previously mentioned office building and plants, and wastewater from the regeneration of resins and membranes. The plant became ISO 14001 certified and worked to reduce its environmental burden.

In fiscal 2017, efforts were made to lessen the environmental burden by rebuilding the pure water production system in the resin regeneration plant. It is necessary to regenerate ion-exchange resins employed in pure water production systems using chemical products because the resin’s ability to exchange ions declines as water passes through. Since it is possible to more efficiency regenerate resins when the water used in the process is heated, the facilities were renovated so that pipes that carry the regeneration water pass through the heating equipment used by other facilities. Therefore, it was possible to reduce energy use, regeneration chemical products, and regeneration wastewater by reducing the regeneration frequency. Other improvements were made, such as reviewing how the ultrapure pure water production system is operated and optimizing water use for membrane cleaning.

  • *1Ultrapure water: Water with a purity level of near 100% prepared by removing ions, organic substances, air, fine particles, microorganisms, and other impurities to the maximum degree
  • *2Ion-exchange resin: One type of composite resin that functions to exchange ions in the water with those in the resin.

Pure water systems. Brown pipes carry heated water for the regeneration process.

Pure water systems. Brown pipes carry heated water for the regeneration process.

Targets for Fiscal 2018

Item Targets for fiscal 2018 Approach
Specific energy consumption Average annual reduction of 1% since fiscal 2014
(for both production and non-production sites)
Set a target on per-unit energy consumption in crude oil equivalent on a site-by-site basis to encourage them to address their reduction targets.
Waste generation Below the previous fiscal year level Individual sites will set their own targets to continuously endeavor to reduce waste generation and to increase the recycling rate.
Recycling rate Above the previous fiscal year level