Vand The Kalundborg Region as well as the industrial companies are large consumers of water. This is why the Symbiosis companies are seeking to recycle as much water as possible. Asnæs Power Station has, for example, reduced its total water consumption by 60%. Previously Asnæs Power Station used ground water for its power and heat production only. The ground water has now been substituted by surface water from the lake of Tissø and treated wastewater from Statoil. These efforts have enabled Asnæs Power Station to reduce its ground water consumption by 90%. Earlier, Novozymes A/S also used ground water exclusively for processes requiring drinking water quality. 1 million cubic metres of ground water have now been substituted by lake water from Tissø whose water has been processed up to drinking water quality by Kalundborg Municipality.
As the water from Tissø is not an unlimited resource, the consumption of lake water has gone down by 50%. Asnæs Power Station has accomplished this reduction by recycling its own wastewater.
WASTEWATER
The wastewater is led to a recycling reservoir together with the runoff from the surrounding fields and surplus water from Tissø in the winter period. The recycling reservoir has a capacity of 220,000 cubic metres of water, which are used in the power station processes.
The wastewater from Novozymes A/S and Novo Nordisk A/S is part of a genuinely symbiotic relationship: Novozymes A/S treats all wastewater up to a level corresponding to the wastewater of an ordinary household. From Novozymes A/S, the treated wastewater is pumped to the treatment plant of Kalundborg Municipality where a final treatment process takes place.
The Novozymes A/S wastewater is of a relatively high temperature making it easier for the municipal treatment plant to treat its wastewater. In this collaboration process, the environment is also the winner as the overall discharge of nitrogen into Jammerland Bugt is very limited. Wastewater is also discharged from Asnæs Power Station into the treatment plant of Kalundborg Municipality.
