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Reduction in the amount of chemical substances handled

Results of FY2016 and future initiatives

In FY2016, electronic devices as well as social infrastructure systems accounted for over 90% of the total amount of chemicals handled, with substances used for chemical reactions and wastewater treatment raking high among chemicals. The material balance for PRTR-covered chemicals indicates that 74% of them are removed through coagulation and absorption and 11% are consumed together with the products that contain them, which taken together represent the majority of the chemicals handled. It also indicates that only about 3% of the chemicals used are discharged into the atmosphere or hydrosphere. We will continue to improve manufacturing processes to reduce the amount of raw materials handled.

Amounts of substances targeted for reduction handled
[Image] Amounts of substances targeted for reduction handled

Breakdown of the amounts of substances targeted for reduction handled (FY2016)
[Image] Breakdown of the amounts of substances targeted for reduction handled

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Case Study 1: Improving efficiency in reducing the amount of gases and chemicals by visualization and abnormality detection

Oita Operations, Toshiba Corp.

Toshiba Corporation's Oita Operations has developed a tool (iCAS: Integrity Cost Analysis System) designed to clarify the optimal (theoretical) amounts of gases and chemicals required for processing in semiconductor manufacturing and to visualize and analyze disparities between the theoretical amounts and amounts actually used.
iCAS enables the differences between theoretical and actual amounts of gases and chemicals to be grasped, thereby helping reduce emissions.

[Image] Universal system accessible to a wide range of users, from managers to production line operators
Universal system accessible to a wide range of users, from managers to production line operators

[Image] Implementing an improvement cycle with iCAS

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Case Study 1: Paint process cleaners: Reduction in the amount handled by recycling for reuse

[Image] Paint process cleaners: Reduction in the amount handled by recycling for reuse

Toshiba Industrial Products Asia Co., Ltd.

In Vietnam, waste thinner used to clean hanging tools, spray guns, and jigs used in the paint process was commissioned to a cement manufacturer for thermal recycling. In order to reduce both the amount of thinner used and waste thinner treatment costs, the company introduced thinner recycling equipment and began to recycle thinner for reuse. This enabled the company to reduce the amount of new thinner used by about 440 liters per month compared to the pre-introduction level. In addition, the amount of waste thinner discharged was reduced substantially, reducing waste thinner treatment costs by approximately 160 US dollars per month.

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