Environmental Improvements ActivitiesReduce Waste

The Kurita Group needs to make effective use of limited resources in order to conduct its business activities sustainably.Therefore, the Group is working to reduce the amount of waste generated by its business activities, while making efforts to convert it into valuable material and to recycle it. For our customers, we propose technologies for making use of waste as a resource and for reducing the amount of waste generated. Through these activities, we aim to reduce waste for society in general.

Targets for 2022

The Kurita Group aims to achieve a reduction of environmental impact through its business that offsets and even exceeds the environmental impact generated by its business. To this end, we have set targets for the “amount of the reduction in environmental impact of customers - the amount of the Kurita Group’s own environmental impact” for fiscal 2019 onwards. We will continue to measure these actual values going forward values.

Waste reduction at customers
– Waste generated from our business activities

100,000 t

Contribution to SDGs

With Customers

Customers’ Environmental Improvement Activities

The graph shows the waste reduction performance of proposals for customers’ plants and business sites made by the Company and domestic Group companies. These results are mainly due to conversion to wastewater treatment facilities that generate little excess sludge and reduction of waste volume by dehydrating agents and dehydrators. In fiscal 2018 fewer orders for wastewater treatment plants resulted in a decline in waste reduction from fiscal 2017.

Improvement Examples

Waste Reduction at Sabae Murata Manufacturing Co., Ltd. (Initiative by Kurita Meiki Ltd.)

Waste volume Reduced by 95

Electronics manufacturer Sabae Murata Manufacturing Co., Ltd. is part of the Murata Group, and is making efforts to reduce its environmental impact towards achieving the Group’s medium-term environmental targets. Changes in the company’s production items and an increase in production volume caused some of the production facilities to generate concentrated wastewater that could not be treated with its existing wastewater treatment facility.Since the entire volume of this was treated as waste,reducing the amount of concentrated wastewater became an urgent priority.
Kurita Meiki proposed reducing the volume of concentrated wastewater using a vacuum concentrator. This equipment reduces the atmospheric pressure, causing the water content to evaporate at a lower boiling point and thereby reducing the volume. Heat is required to evaporate the water, but the evaporation heat is reclaimed using a heat pump and then reused for heating. After accepting the proposal, Sabae Murata Manufacturing Co., Ltd. was able to achieve a 95% decrease in the volume of concentrated wastewater that was treated as waste.

Vacuum concentrator

Vacuum concentrator

Voice of the Customer

Daisuke Yokozawa

Mr. Daisuke Yokozawa
Team Leader,

Thanks to this proposal, we can now see the way forward to increasing production while reducing waste.Moreover, the proposal has been reported to the Murata Environment Committee and has also been highly appreciated by management.Waste reduction is a neverending task, and we hope to receive further assistance from Kurita Meiki, going forward.

Waste Reduction at NIPPON SURFACTANT INDUSTRIES CO., LTD. Nasu Factory (Initiative by Kurita Water Industries Ltd.)

Reduction in waste amount 28.5

The Nasu Factory of NIPPON SURFACTANT INDUSTRIES CO., LTD. manufactures various chemical products that form the raw materials for pharmaceuticals, cosmetics, and so forth. The factory has acquired ISO 14001 certification and works continuously to reduce its environmental impact.
The company’s wastewater processing facility was obliged to undertake sporadic pH adjustments and regular sludge removal to combat odors and destabilization of biological treatment caused mainly by coagulants. Moreover, the amount of chemical treatment usage was increasing, and elimination of the resulting sludge had become an issue.
Kurita Water Industries proposed the use of a coagulant that did not contain the component that had been the primary cause of odors. The coagulant efficiently complemented the contaminant materials, so that the amount of additive could be reduced. This enabled a reduction in the amount of waste from coagulant as well. Furthermore, since the coagulant is slightly acidic, it had less of an impact on microbes. After the client accepted the proposal, their waste volume was successfully reduced by 28.5%.

Waste water treatment facility

Waste water treatment facility

Voice of the Customer

Right/Mr. Riichi Ohoke Left/Mr. Masaru Tomizawa

Right/Mr. Riichi Ohoke
General Manager of Environment Division
Left/Mr. Masaru Tomizawa
Environment 2Group,Environment Division

Kurita Water Industries’ proposal not only reduced the amount of waste, but also reduced the amount of labor required for operation management and improve the level of safety. Since adopting the proposal, the frequency of sludge removal has been gradually declining, so we expect the amount of waste to decrease even further. We look forward to receiving more proposals from our trusted water treatment professional going forward.

At the Kurita Group

Internal Environmental Improvement Activities

Reduction Performance in Fiscal 2018

  Fiscal 2018 target Fiscal 2019 result
Waste Generation 27,261 t or lower 29,453t
Recycling Rate 90.1% or higher 90.9%

The graph shows the waste volume and recycle rate performance of the Company and its domestic Group companies.In fiscal 2018, the Group undertook initiatives such as processing a portion of the liquid waste that was treated as industrial waste using its own wastewater treatment facilities and converting metallic waste into valuable material.However, due to an increase in substances that place a burden on the environment included in customers’ plant wastewater at some ultrapure water supply business sites,we did not reach our target on waste volume. On the other hand, since all of the waste increase at the aforementioned ultrapure water supply business sites was recyclable, we achieved our target recycling rate.

Example of Promoting Recycling at Kurita Water Industries Ltd.’s Osaka Office

Kurita Water Industries’ Osaka Office has the second largest number of employees for an office-type business site after Head Office (as of March 31, 2018). Since the office is a tenant in its building, it is unable to implement measures to reduce waste that have a major impact, such as those taken at production sites. However, the office continues to implement down-to-earth measures to reduce environmental impact, such as setting the times that the facility can be used.
The Osaka Office has been promoting waste recycling through a rigorous waste sorting program implemented since fiscal 2018. The office has been laid out to facilitate sorting of waste by providing waste bins for 12 different types of waste, such as combustible waste, plastic waste, and others. In addition, the bins are labeled clearly to show how the waste should be sorted. Furthermore, the Osaka Office Noticeboard on the intranet provides information on the status of the initiative to help raise environmental awareness among the employees.

Organized waste bins

Organized waste bins

An outline of the waste
sorting program is provided
on the company noticeboard
on the intranet