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Hylte Mill was the setting for the year's most significant waste water treatment project. Thanks to Hylte's new waste water treatment plant, discharges of oxygen-demanding substances (COD) into the River Nissan fell by approximately 20% during 2002. Surveys have revealed that the mill does not have any significant impact on oxygen levels downstream.
Hylte Mill has invested EUR 22 million in the new
waste water treatment plant. The cleaning process
now consists of one mechanical stage, two biological
stages and a chemical treatment stage.
The adoption of the latest treatment methods has helped solve the problem of unpleasant odours that have sometimes bothered the mill's neighbours. Sludge is now treated separately, before it is finally incinerated in a boiler to provide energy for the mill's pulp and newsprint machines.
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