Reducing Substances with Environmental Impact and Waste

Reducing Substances with Environmental Impact and Waste

Tokuyama is continually working to reduce its emissions of air and water pollutants and implementing environmental conservation initiatives such as waste recycling. 

Reducing Water and Air Pollutants

Amounts of Atmospheric Emissions

In order to reduce atmospheric pollution from sulfur oxides (SOx) and nitrogen oxides (NOx), Tokuyama equips boilers, cement kilns, and other pollutant-generating facilities with flue gas desulfurizers, denitration equipment, low-NOx burners, and high-performance dust collectors.

Emissions of Pollutant Release and Transfer Register (PRTR)*Substances

The substances handled in fiscal 2020 included 30 substances that must be registered under Japan’s PRTR law.
*The PRTR system collects and publishes data on the sources of designated harmful chemical substances and the amounts of these substances discharged in the environment or transported from production sites as part of waste matter

Amounts of Hazardous Air Pollutant Emissions

Tokuyama generates chloroethylene and three other substances that are subject to voluntary controls under Japan’s Air Pollution Control Act. The Company has formulated a voluntary action plan and is working to reduce emissions of these substances.

Amounts of Industrial Effluent and Wastewater

The Tokuyama Factory follows a stringent system for monitoring industrial effluent and purifying wastewater using treatment equipment in order to comply with regulatory standards and limits set by the local government, as well as the Company’sown standards, which are even stricter. The factory also employs activated sludge treatment facilities for reducing the discharge of nitrogen and phosphorous and meeting chemical oxygen demand (COD)* regulations for overall water quality.
*Chemical oxygen demand is an indicator used to measure water quality, and refers to the amount of oxygen required to oxidize organic compounds in water.

Waste Management

The effective utilization rate for waste and the “zero emissions” rate remained high in fiscal 2020, due to efforts to reduce the volume of waste and comprehensive recycling efforts.

PCB Waste Disposal

The Company finished disposing of all high-concentration PCB waste from transformers and condensers. High-concentration PCB waste from ballasts will be fully disposed of by the end of fiscal 2021. Tokuyama will systematically dispose of lowconcentration PCB waste, while Group companies fully disposed of their low-concentration PCB waste.

The Nanyo Plant's Cement Production Recycling System