panorama aerial view flensburger förde with sewage treatment plant and murwik naval school at flensburg.

baltic bay boat chemical circle city coast contaminants efficiency environment excremental firth fjord flensborg flensburg flensburger forde garbage german germany harbour holstein industry klärwerk landscape marina maritime murwik mürwik naval overflow plant pollution port purification recycle removing sail schleswig school sea sewage ship sludge storage tank the town treatment treats waste water