PROCESS OPTIONS AT A SEWAGE PLANT WITH 3-SLUDGE BIOLOGICAL NITROGEN REMOVAL AT INCREASING PLANT LOADS
Methods for biological nitrogen and phosphorus removal in domestic wastewater have been developed to a great extent during the last two decades. Thus, it is desirable to design a sewage treatment plant in a flexible way in order to change the mode of operation particularly in an area with rapid population growth. Sunbury Sewage Treatment Plant is located in the state of Victoria, Australia, and discharges to Jacksons Creek, which is considered to be located in one of the most sensitive catchment areas. The plant was designed in 1973 for biological nitrogen removal, chemical phosphorus precipitation, filtration and disinfection. The design population was 30,000 persons, but at the time for commission the number of connected persons was only 10,000. The plant was designed for biological nitrogen removal according to the best available technology utilizing a 3-sludge biological process with post-denitrification in anoxic filters. “Complete abstract not presented.”