Even though removal of fluoride in HF wastewater by crystallization using a fluidized bed reactor (FBR) has been widely studied as an efficient alternative to the chemical precipitation method using traditional stirred tank reactor, serious problems have been encountered for the optimum design of FBR together with the determination of proper operating conditions. One problem is the proper formation of the fluidization state of the seed as a function of seed particle characteristics such as particle size and density. Because dynamics in the reactor are governed by forces such as gravity, drag, and buoyancy as a function of particle size, particle density, relative velocity together with flow characteristics, this study carefully examines the effects of these factors on the formation of fluidization via theoretical analysis and numerical calculation in fluidized bed reactors in the range of practical design and operation condition. The results of this study show the overall trend of the motion of particle behavior in terms of particle size and flow condition.

• 김용주(충남대학교 환경공학과) | Yongju Kim (Department of Environmental Engineering, Chungnam National University)
• 신미수(충남대학교 환경공학과) | Misoo Shin (Department of Environmental Engineering, Chungnam National University)
• 장동순(충남대학교 환경공학과) | Dongsoon Jang (Department of Environmental Engineering, Chungnam National University) Corresponding author