DAF모델을 이용한 축산폐수 고형물의 부상특성 = Flotation Characteristics of Livestock Wastewater Solid Using DAF Model

다국어 초록 (Multilingual Abstract)

The series of experiments under the various conditions were carried out to evaluate the feasibility of dissolved air flotation (DAF) as an alternative of conventional gravity sedimentation (CGS) and to investigate the decrease of the loadings following to biological wastewater treatment processes in livestock wastewater system. Collision and bubble filtration efficiency were simulated though the single-collector collision model and the population balance model to find out to investigate the removal characteristics of pollutant particles. It was revealed that in the case of 25 ㎛ bubble diameter over 90% of bubble-floc agglomerates removal efficiency could be achieved under the below hydraulic loadings 2.0 m/hr on the basis of the simulation result by population balance model. Under the above operational condition it was required that the mean particle diameter of livestock wastewater should be over than 100 ㎛ as a coagulated floc, additionally. On the contrary, over 90% of bubble-floc agglomerates removal efficiency could be gain at least under the hydraulic loadings 10.8 m/hr, in case of 100 ㎛ bubble diameter.