A Study on the Wastewater Treatment Characteristics of the Indirectly Aerated Fluidized Bed - Effect of Temperature and pH -

The characteristics of wastewater treatment according to condition of temperature and pH in indirectly aerated fluidized bed of sand media were studied experimentally, and the obtained results were as follows; Under the indirect aeration. the BOD removal efficiency rised continually in the range of temperature to but under air-aeration of about . filamentous bacteria came into existence due to insufficient dissolved oxygen, and the BOD removal efficiency came down. On the other hand. under oxygen-aeration filamentous bacteria disappeared as time goes by (about 3 days). A factor of temperature correction was , and a factor of pH correction was in the pH range of 5 to 12, but was dropped to at pH under 4. Under the conditions of pH 4 or below, filamentous bacteria exuberated grossly. the phenomenon of bioparticle colligations showed and the BOD removal effinciency came down grossly.