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Water Consumption Reduction

Water Consumption Reduction Initiatives

Sumitomo Riko considers water to be an important resource, as a large amount of water is consumed for cooling applications in manufacturing equipment and plastic molded products, and for surface treatment and cleaning of metal parts used in products. However, water risk is always ranked high in the Global Risk Report published by the World Economic Forum. Therefore, in order to address this issue, we use AQUEDUCT, an international water risk assessment tool, to assess the water risk in the regions where all of our domestic and overseas production sites are located, and then conduct water risk surveys through interviews with all of our domestic and overseas production sites. Based on the results, we are strengthening our efforts to address various water risks such as depletion of water resources, deterioration of water quality, flooding, and tightening of regulations.

Water consumption (Sumitomo Riko Group)
Graph: Water consumption (Sumitomo Riko Group)
  • *1 Data boundary in fiscal 2016: Sumitomo Riko, four Sumitomo Riko Group domestic companies, and 11 Sumitomo Riko Group overseas companies.
  • *2 Four domestic and 17 overseas companies have been added to the data aggregation since fiscal 2017.

Examples of reduction of water consumption

Reuse of process wastewater

SumiRiko Ohio, Inc. (U.S.) previously released water treated after wet blast process to a municipal effluent treatment company for treatment. It has since made improvements to enable that wastewater to be reused to replenish cooling water used in the production process. Specifically, an automatically controlled three-way valve installed at the discharge unit was designed such that wastewater is send to the effluent treatment company only when the process cooling water tank is full. This has resulted in major benefits in terms of reducing the volume of mains water used to replenish the water for the cooling water system.

Figure: Reuse of process wastewater

At SumiRiko Hose Otomotiv Sanayi Ticaret ve Pazarlama Limited Sirketi (abbreviated as SRK-HTR, Turkey), a water recovery system has been installed to improve the reuse of hot water that was previously discharged from the facility. As a result, SRK-HTR has been able to reduce the amount of water it purchases by 25%.

Reuse of Domestic Wastewater


Reuse of wastewater by RO system TRJ (China)

Tokai Rubber (Jiaxing) Co., Ltd. (abbreviated as TRJ, China) has been using recycled water in the production process since January 2018, prompted by the ban on direct discharge of non-industrial wastewater in accordance with new regulations. TRJ’s non-industrial wastewater is treated with water treatment equipment that employs a reverse osmosis membrane system, after which it is used in the production process. As a result, TRJ achieved a 20% reduction in the volume of water purchased.