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Management of substances that have impacts on the atmosphere and hydrosphere

Toshiba Group is working to grasp the extent of emissions of sulfur oxides (SOx) and nitrogen oxides (NOx), both of which are major causes of air pollution, as well as water pollutants and ensure appropriate management of such emissions. Each production site voluntarily sets the maximum permissible levels of concentrations for these substances and complies with these prescribed standards, but total emissions fluctuate as production volumes increase or decrease.

Production sites in Europe and North America have already applied to wastewater the environmental impact risk assessment method (whole effluent toxicity (WET)* method), which uses biological indicators. Those in Japan have also started to consider using it as a new indicator of wastewater management.

*
Whole Effluent Toxicity

Impacts on the atmosphere
Amount of impact = concentration of each substance × amount of substance emitted
(based on the Air Pollution Control Act)
[Image] Impacts on the atmosphere

Impacts on the hydrosphere
Amount of impact = concentration of each substance × amount of substance discharged
(based on the Water Pollution Control Act)
[Image] Impacts on the hydrosphere

  • Starting in FY2007, data include those for Sigma Power Ariake and Sigma Power Tsuchiura.
*
N-hexane extracts, phenols, copper, zinc, soluble iron, soluble manganese, total chromium, total phosphorus, and nickel

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