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RPM RR進入發燒排行的影片

利用超重力旋轉填充床氣提異丙醇、氨氮及二氧化氯水溶液

為了解決RPM RR的問題，作者Trinh Minh Viet 這樣論述：

This study investigates the application of the rotating packed bed for two purposes which are: wastewater treatment and stripping of ClO2 as for air disinfection. Industrial wastewater from the wafer and PCB (printed circuit board) manufacturing contains a very high concentration of IPA (isopropyl

alcohol) and ammonia. During the outbreak of coronavirus disease (COVID-19) pandemic, air disinfection has become extremely necessary which has paved a way for ClO2 application since the ClO2 gas can be stripped out from the high concentration solution (above 1000 ppm) to a desired dosage in the gas

phase by the rotating packed bed. The concentration of COD (represented for IPA) in wafer manufacturing wastewater and ammonia in PCB wastewater is 22814 mg/L and 10800 mg/L, respectively. The stripping efficiency toward the pollutants, the overall liquid-phase mass transfer coefficient (KLa), and

overall height of mass transfer unit (HTUOL) were examined under various operating conditions such are gas to liquid ratios, rotational speeds, inlet liquid temperatures for IPA stripping, and different pH value for ammonia stripping. At the optimum conditions, the removal efficiency of IPA and ammo

nia was recorded approximately 80%. The ammonia stripping efficiency also reached around 80% with the optimum condition of pH 12, rotational speed of 900 rpm, and gas-liquid flow rate ratios of 1000. A lower concentration of COD and ammonia can be achieved if the stripping process repeats in series

within the same optimum condition. The ClO2 stripping experiment was conducted in a rotating packed bed of High-gravity (HiGee) process-intensification-based disinfection equipment. Parameters affect the gas concentration were examined such as input liquid concentration, gas flow rate. Stripping eff

iciency of different types of ClO2 solution is also compared in this experiment. The optimum operating conditions for ClO2 stripping was found at gas-liquid flow rate ratio of around 3000, rotational speed of 1200 rpm. The concentration of ClO2 gas generated from stripping varied from 30 ppm to 265

ppm, which was conviniently adjusted by choosing corresponded liquid flow rate (0.04 mL/min to 0.21 mL/min) and gas flow rate (494 L/min tot 988 L/min) with the initial concentration of liquid of 1730 mg/L.