Domestic Wastewater Treatment by Two Different Constructed Wetland Systems

Abstract

Two different types of constructed wetland; Free water surface flow wetland (FWS wetland) and Horizontal subsurface flow wetland (HSF wetland), were evaluated for their wastewater treatment efficiency. Both systems were fed with domestic wastewater collected from canteen and operated under continuous flow with 5 days of HRT. The result showed that both systems were able to change the pH of wastewater from acid to neutral. Nevertheless, EC and TDS of FWS wetland effluent did not differ from those of influent but EC and TDS of HSF wetland effluent were higher than influent. T-test analysis indicated the difference between FWS wetland and HSF wetland for removal of NH3-N, SS, BOD5 and TP. FWS wetland was found to be superior for NH3-N removal while HSF wetland exhibited high performance for SS, BOD5 and TP removal.