Extended acid digestion for inactivation of fecal coliforms.
The objective of this research was to establish a correlation between inactivation of fecal coliforms caused by organic acids in their unionized form in batch acid digesters and semicontinuously fed acid digesters at both mesophilic (38 degrees C) and low-mesophilic (24 degrees C) temperatures. Batch acid digesters achieved a U.S. Environmental Protection Agency Class A level of fecal coliforms within 6 to 7 days of digestion at both temperatures. Semicontinuously fed, staged, acid-digestion systems achieved Class A standards on average only at mesophilic temperature at a solids retention time of 11 days. Systems operated at low-mesophilic temperatures did not achieve Class A standards.
Puchajda
Bartek
B
Department of Civil Engineering, University of Manitoba, Winnipeg, Canada.
Oleszkiewicz
Jan
J
D004755:Enterobacteriaceae; D005232:Fatty Acids, Volatile / Q000032:analysis; D005243:Feces / Q000382:microbiology; D006863:Hydrogen-Ion Concentration; D012722:Sewage / Q000382:microbiology; D013696:Temperature; D014865:Waste Disposal, Fluid / Q000379:methods*; D014873:Water Pollutants
D005232:Fatty Acids, Volatile; D012722:Sewage; D014873:Water Pollutants