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Treatment of Hospital Wastewater by Biological Fluidized Bed
이동환,이민규,감상규,Hano, Tadashi,이회근 한국공업화학회 1997 응용화학 Vol.1 No.2
Simultaneous treatment of phenol, m-cresol and formaldehyde in wastewater was carried out in a fluidized bed reactor. The response of the treatment unit against the change of inlet pollutants concentration was measured by changing stepwise the concentration of one component in the mixture. The mutual interaction between each components was quite different. Simultaneous biodegradation of phenolic compounds and formaldehyde could be successfully and stably carried out in a three phase fluidized bed by taking enough residence time.
Lee, Min Gyu,Hano, Tadashi 한국화학공학회 2001 Korean Journal of Chemical Engineering Vol.18 No.2
The effect of hourly load change on the treatment characteristics in an anaerobic-aerobic activated sludge process was compared for two types of variation. When the variation of wastewater concentration or flow rate was applied to the treament unit according to normal distribution function like effluent pattern in actual life, the treatment system gave relatively stable and successful removal of nitrogen and phosphorus compounds. When the mass flow rate of nitrogen applied to the treatment unit was equal, the performance of the present process was almost same regardless of load variation mode. The simulation of treatment behavior was carried out successfully by using the kinetic equations for sludge floc and the reactor models which considered the treatment unit as a completely mixed tank.
Lee Min-Gyu,Suh Kuen-Hack,Hano Tadashi The Korean Environmental Sciences Society 1997 Environmental sciences Vol.1 No.1
The treatment performances of anaerobic-aerobic activated sludge process were investigated under various operation conditions. The treatment system proposed in this study gave a relatively stable performance against hourly change of the flow rate and showed a satisfactory removal efficiency of nitrogen and phosphorus compounds under experimental conditions. The average removal efficiency of total nitrogen gradually decreased as the influent total nitrogen concentration was increased. High C/N ratio of the wastewater was required for the complete removal of nitrogen. Glucose as a carbon source was more efficient than starch and the removal ability for all components become higher with the increase of the fraction of glucose.