The objective of this study was to examine the transient response to hydraulic shocks in an inverse fluidized bed biofilm reactor(IFBBR) for the treatment of apartment sewage. The hydraulic shock experiments, when the system were reached at steady state with each HRT 12, 7, and 4hr, were conducted by changing twice HRT per day during 3days. The SCOD, SS, DO, and pH of the effluent stream were increased with hydraulic shock, but easily recovered to the steady state of pre-hydraulic shock condition. In spite of hydraulic shock, there were not much variation of biomass concentration, biofilm thickness, and biofilm dry density.

• 박영식(부산대학교 화학공학과) | Young-Seek Park (Dept. of Chem. Eng., Pusan National University)
• 나영수(부산대학교 화학공학과) | Young-Soo Na (Dept. of Chem. Eng., Pusan National University)
• 서정호(부산대학교 화학공학과) | Jung-Ho Suh (Dept. of Chem. Eng., Pusan National University)
• 안갑환(지산전문대학교 환경관리과) | Kab-Hwan Ahn (Dept. of Environ. Sci. & Tech, Jisan Junior College)
• 송승구(부산대학교 화학공학과) | Seung-Koo Song (Dept. of Chem. Eng., Pusan National University)