Summary:

The paper presents results of research concerning changes in total phos-phorus concentrations from outflow from following beds of constructed wetland in Paszkow. There was analyzed domestic wastewater which was supplied to the four beds made as constructed wetland.
The beds were designed with horizontal subsurface flow in a mixed config-uration (serial - parallel). The evaluation assessed the composition of domestic wastewater supplied to the beds and as well as physico-chemical composition of the outflows. The research was conducted during July 2008 - March 2011. It was found that the average treatment efficiency for total phosphorus was at 40,0 %, with the highest annual treatment effects were observed for bed no.1. The average concentration of total phosphorus in the effluent discharged to the receiver was 4,4 mgPdm-3. Due to requirements to be met by the outflows form wastewater treatment plants for P.E < 2000, the wastewater treatment plant meets the conditions only for values of BOD5 and COD. In the case of the suspension exceeded to the limit values were observed during whole research period.