Environment and Energy Business

We are pursuing the protection of water resources by developing water-circulation reusing system at production sites, equipment for the use of rainwater and recycled waste water, and waste water treatment devices. We aim to contribute to proper utilization of water in various scenes such as in daily lives and at manufacturing sites.

Factories that manufacture semiconductors and flat panel displays use a great deal of pure water, ultrapure water, and various chemicals. Though they discharge sewage and waste chemicals, we can reduce both environmental impact and costs by reusing them as much as possible. More specifically, we have introduced a pure water recycling system that allows us to recover and reuse at least 88% of the pure water used in factories. We are now also operating a resist stripper recycling system capable of recovering 90% of the resist stripper used in the semiconductor manufacturing process, to reduce sewage and waste chemicals and to use water resources more efficiently.

In fiscal 2008, we succeeded in bringing into practical use a system to reduce industrial waste generated at food factories, by means of EcoSludge, which is a plant that reduces sludge by using a swim bed and ultrasonic waves. The plant generates less surplus sludge and requires less maintenance.

‘EcoSludge’ sludge reduction plant