Present condition of sewage system, the variants of new sewage and possible locations of the future waste water treatment plant are described. It also includes the hydraulically analysis of the sewage system from the contributive area which used as basis for dimensioning the WWTP. Further on, the known processes of biological treatment with its advantages are described.
The calculation of annual operation costs of the working of the plant is represented; the perspective amortization of the building, the hydromechanical and electrical equipment taken into consideration. The calculation of operation costs is described as cost on cubic meter of cleaning water and as the cost per population equivalent.
