Of the hazardous air pollutants specified under the Air Pollution Control Act, we are particularly focused on reducing emissions of priority substances that pose a significant health risk.
The Japanese government set a target of reducing fixed-source volatile organic compound (VOC) emissions in fiscal 2010 by 30% compared with fiscal 2000. VOC emissions at Mitsui Chemicals reached 8,523t in fiscal 2000, so our goal is 5,966 tons/year. However, the Company established an even stricter goal and achieved emissions of less than 3,000 tons/year in fiscal 2010. We have since continued maintaining emissions at this level. Because the Mitsui Chemicals Group produces various chemical products, a wide range of VOCs are subject to reduction, such as solvents used in production and decomposed residue from plastic molding. We use various methods to reduce VOC emissions into the air, including absorption by activated carbon and other filters, neutralization by acid or alkaline water, combustive decomposition, and Pressure Swing Adsorption (PSA).
Further, burning fuel in chemical manufacturing processes generates SOx, NOx, and soot and dust. We therefore implement a variety of measures to reduce release of these items into the atmosphere by removing them using catalysts, installing dust collectors and washing towers, and using fuels free from nitrogen and sulfur.
Volatile Organic Compound (VOC) Emissions
*Mitsui Chemicals, Inc. emitted 1,621 tons achieved its goal of less than 3,000 tons/year in FY2018.
Soot and Dust Emissions
Emissions of Hazardous Air Pollutants (Mitsui Chemicals, Inc.)
*Precious emission figures: 771 tons (FY1995), 445 tons (FY2000), 110 tons (FY2005)
*Scope of Mitsui Chemicals, Inc.: Parent company production sites and the Sodegaura Center.
*Scope of domestic and overseas affiliates: Production sites operated by consolidated subsidiaries and affiliated companies eligible for Responsible Care support.