The Challenge: Located deep in the mountains of Stryn,, the original plant consisted of an inlet pump station and Salsnes filter for pretreatment, fat removal and a Salsnes filter for post treatment. The plant also had 8 concrete tanks which were not in use. The municipality was faced with equivilent loading rates of 10,000 PE and the existing system was rated for 5,000 PE so it was either install pretreatment at Nordfjord Kjott to drop the load to 5,000 PE or upgrade the municipal WWTP.
The Design: The Biowater CMFF biological process was chosen. The CMFF is a biological fixed film process utilizing biofilm carriers to degrade wastewater. The new equipment - upgrade involved a retrofit of the Biowater CMFF into the original tank configuration.
Achievements: The Biowater system effectively reduced COD concentration of approximately 5,ooo mg/L to a final effluent of approximately 500 mg/L. The system was easy to install, cost effective, low maintenance and continues to run perfectly.