Material Balance
OTC's environmental management system is designed to ensure that all aspects of its business activities are environmentally friendly.
As part of this, OTC is continuously working to improve energy efficiency and the effective use of waste heat, water and resources, as well as the recycling of by-products.
As a means of reducing environmental impact, OTC promotes the recycling of waste. In particular, OTC recycles materials that would have a significant environmental impact if disposed of as waste, thereby reducing the environmental impact.
Valuable industrial waste (Amount of industrial waste recycled)
![](../img/grapgh05-min.png)
*1 Increase in amount of valuable industrial waste in FY2020 due to removal of former Kishiwada polysilicon plant
Waste sulphuric acid recovery unit
![Waste sulfuric acid recovery equipment](../img/19image01.png)
Waste hydrochloric acid recovery unit
![Waste hydrochloric acid recovery equipment](../img/19image02.png)
Wastewater purification system
![Waste water purification equipment](../img/19image03.png)