摘要：In any attached-growth biological treatment systems, active aeration is very important to harness the inherent advantages like higher growth rate of microorganisms, èc, less sludge and higher rate of substrate conversion into stable compounds. The present study envisaged an experimental model of attached - growth aerobic reactor having nine liters of effective volume with diffused aeration system and alternatively surface aeration facility also. The experiment was run alternatively for both the methods of aeration under varying influent rates (0.19, 0.38, 0.50, 0.75 & 1.50 L/hr) and varying COD (1015.16, 1531.85, 2031.64, 2522.16 and 2996.72mg/L). It is found that the model performed COD removal from 68.87% to 88.66% for the applied organic loading rates of 0.0047 to 0.1244 Kg COD/m2.day for surface aeration and 69.88% to 93.57% for diffused aeration in similar, identical experimental conditions
