Errors in the design of small and ultra-small waste water treatment plants of northern design, their calculation and analysis of the results obtained

The calculation of the current station of sewage treatment plants of the Northern was carried out on the basis of experimental data, including the results of laboratory studies of design characteristics and measurements of hydraulic parameters. The calculation was performed using mathematical models of the SRI VODGEO/SamSTU and SNiP 2.04.03-85. The calculation of the station and operational parameters is analyzed. Underestimated volumes of the station capacitive equipment were revealed at the design stage, which later led to an abnormal quality of waste water treatment. As a result of the conducted research, there were grounds for the reconstruction of the WWTP to equip the station with a denerifier and increase the aeration zone.