||Mechanism of Waste Treatment at Low Temperature. Part B: Sanitary Engineering. The Effects of Water Temperature and Elevation upon Aeration. BOD and COD Removal from Wastewater by Aeration with Air and Oxygen.
Hunte, John S. ;
War, John C. ;
Johanse, Richard P. ;
||Colorado State Univ., Fort Collins. Environmental Resources Center.
||Completion-34; DI-14-31-0001-3206 ;DI-14-31-0001-3506; OWRR-A-007-COLO; 00140,; A-007-COLO(2)
( Sewage treatment ;
Cold weather tests) ;
Dissolved gases ;
Biochemical oxygen demand ;
Mathematical models ;
Chemical oxygen demand
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
A laboratory-scale mechanical aeration system was used to examine the variation in oxygen transfer rates into water as a function of water temperature (0 to 40C). The relative aeration efficiency decreases with increasing elevation, water temperature, and dissolved oxygen concentration. Equations were developed relating saturation dissolved oxygen concentration to temperature and atmospheric pressure to elevation and air temperature. Both air and oxygen were used under identical conditions to determine the effect (if any) of dissolved oxygen concentration on the rate of oxygen demand removal. The use of oxygen in an enclosed contact-stabilization activated sludge wastewater treatment plant suitable for high altitudes and latitudes is shown.