Comparison between biofiltration reactor and wastewater treatment plant with extended aeration

A balanced ecosystem provides an environment for water to clean itself. However, with the human evolution and development of its activities such environment is no longer possible as the emissions are substantially larger. Sustainable water management is therefore imminent and this is why polluted water needs to be handled in an appropriate wastewater treatment plant. The required quality of water is defined with statutory values of individual substance parameters. The quality of treated water depends on the type of wastewater treatment plant and efficiency of its management. In wastewater treatment plant wastewater can be fully or only partially purified and then mixed with surface watercourses, which ensures a normal evolution of fresh water flora and fauna. If used properly practically all established technologies of biological treatment are effective. Therefore they have to be used appropriately for purification of specific wastewater to ensure proper design of a wastewater treatment plant and use of the appropriate equipment that has to be operational and regularly maintained. Each of the well established technology enables purification of wastewater. This undergraduate dissertation focuses on the operation of biofilm and wastewater treatment plants and their significant importance for the environment. The main part of this dissertation is comparison of two different types of wastewater treatment plant. First one, central wastewater treatment plant located in Celje uses the process of extended aeration, and the second one, central wastewater treatment plant located in the Šaleška Valley uses the process of biofiltration