Constructed Wetland for Sewage Treatment and Thermal Transfer Reduction

The studying of thermal transfer reduction through the model house by using a nearby constructed wetland which was set at Khamphaeng Saen, Nakhon Pathom, Thailand. A model house with 3 x 3 x 2.5 m of width x length x ceiling height was established with constructed wetland at west and south of the model house. Differential temperature between inside and outside of the model house was hourly collected by using thermocouple. The sewage which was produced from this house passed through constructed wetland system and sewage treatment efficiency was analyzed. The influent and effluent quality was analyzed at condition of vegetation/non-vegetation in constructed wetland with hydraulic retention time (HRT) of 2 and 4 days. The result showed that, the hottest direction and time was west and south at 4 pm. Vegetation in constructed wetland resulted to significant thermal transfer reduction which was 3 times compared with non-vegetation at west. The wastewater treatment efficiency was increased with vegetation constructed wetland and expanding of HRT.