Performance, and cost comparison of a fws and a vsf constructed wetland system

Two constructed wetland systems, treating domestic wastewater, are compared in terms of performance and costs. One is a free water surface (FWS) wctland system located in Pompia, Crete, south Greece, and the other one is a vertical subsurface flow (VSF) wetland system located in Gomati, Chalkidiki, north Greece. The FWS system is designed for 1200 p.c. Its construction cost was (sic)305,000, and the capital, operation and maintenance cost was (sic)22.07 p.c.(-1) yr(-1) or (sic)0.50 m(-3) of influent. The VSF system is designed for 1000 p.c. Its construction cost was (sic)410,850, and the capital, operation and maintenance cost was (sic)36.81 p.c.(-1) yr(-1) or (sic)0.56 m(-3) of influent. Both systems achieved high removal rates for BOD5, COD, TSS, TKN, phosphorus, TC, and FC, which makes them ideal for small communities in the Mediterranean region.