VÅTMARK OXELÖSUND -RESULTAT OCH ERFARENHETER FRAN SEX ÅRS DRIFT / Wetland Oxelösund – the first six years of operation
Wetland Oxelösund was established in 1993 to remove nitrogen from wastewater before discharge to the Sea. Since it was the first full-scale wetland for nitrogen removal in pre-treated municipal wastewater in Scandinavia, an elaborate monitoring program was tied to the operation of the wetland. The basic monitoring was primarily aimed at mass-balance calculations to estimate removal of nitrogen, phosphorus and BOD. In addition, studies were made concerning: removal processes for nitrogen and phosphorus; removal of indicator microorganisms and hygienic risk assessment; vegetation and birdlife development, and; economic valuation of the wetland. In this paper we describe the wetland system and summarize the results from the first six years of operation (1994-1999).