In the present paper, batch and semi-continuous settling characteristics of a binary calcium carbonatewater system were investigated. Using experimental data of batch settling characteristics, a graphical analysis for a semi-continuous thickening column was developed and compared with experimental results on the basis of Kynch theory, only where the feed velocity line was within the limits of Kynch theorem Ⅲ. The analysis showed good agreement with experiments. Quite erroneous results, however, was observed for the analysis of a sludge region on the underloaded operation, which was considered due to the deviation from the limits of theory.

• 안원술(계명대학교 화학재료공학부) | Won-Sool Ahn (Dept. of Chemical Engineering, Keimyung University)
• 노승백(계명대학교 화학재료공학부) | Seung-Baik Rho (Dept. of Chemical Engineering, Keimyung University)
• 김정배(계명대학교 환경학부) | Jeung-Bea Kim (Institute of Environmental Science, Keimyung University)
• 박상원(계명대학교 환경학부) | Sang-Won Park (Institute of Environmental Science, Keimyung University)
• 최창균(서울대학교 화학공학과) | Chang-Kyun Choi (Dept. of Chemical Engineerig, Seoul National University)