Stora Enso's discharges to water
Water is vital in paper production. Limit values for discharges are set by environmental authorities.
|
Stora Enso aims to decrease COD (Chemical Oxygen Demand) by 10% by the end of 2009 from 2004 levels. The current level is 9% below this baseline.
|
 |
|
Over the last five years, AOX (Adsorbable Halogen Oxide) discharges have fluctuated within a good performance range. Discharges of AOX remained stable in 2007.
|
 |
2) From bleached chemical pulp production facilities only. Normalised figures are reported per unit bleached chemical pulp production.
|
|
Over the 2003-2007 period normalised nitrogen discharges have decreased by 18%. Nitrogen and phosphorus are added as nutrient sources for the biological organisms in the waste water treatment process.
|
 |
|
Discharges of phosphorus have decresed by 39% during the 2003-2007 period. Nitrogen and phosphorus are added as nutrient sources for the biological organisms in the waste water treatment process.
|
 |
