Design of a constructed wetlands for wastewater treatment at Lhota u Nahořan

The thesis deals with the constructed wetlands (an aquatic plant root filter). It characterizes a principle of effluent treatment, types of wetlands and treatment process. A part of the thesis is focused on wastewater sampling sites in Lhota u Nahořan (situated nearby Náchod in Hradec Králové region) and on process of their evaluation. It also describes the location and method of wastewater flow measurement. The collected indicators of pollution and flow rates of the brook in Lhota were used for hydro-technical calculations required for their own constructed wetland project in Lhota u Nahořan. There are two design options suggested for this given location with a population of 73 residents and where the average wastewater flow, as measured, is 113.18 m3/d. The target rates of the ammonia nitrogen and the total phosphorus in the effluent were determined to be 0.5 mg/l. The first version of the solution was according to the horizontal and the other to the vertical filters. The main advantages of this this solution using aquatic plant root filters include a naturally replicated process of wastewater treatment and low operating costs. Also for these reasons, this green zone method is increasingly used for homes, holiday residences and communities