Reduction of Waste

To reduce the large volume of sludge generated at our plants, the SUMCO Group are making efforts to optimize the quantity of chemicals injected for wastewater treatment. As for waste oil, waste acid, waste alkali, waste plastics and other waste, we are promoting both their recycling and their conversion into valuable resources.

Amount of Recycle (SUMCO Group [Japan])


Amount of Disposal (SUMCO Group [Japan])


Waste Reduction through the Adoption of Reusable Containers

We are replacing the containers used to ship 300-mm diameter silicon wafers with reusable alternatives as one of the initiatives to reduce post-delivery waste.
The percentage of reusable containers used for shipment in 2018 was 62.6%.
Before introducing reusable containers, we conduct tests to ensure that the quality of the products is not affected.