| 초록 |
Gas holdup is one of the most important parameters in bubble column system. as increasing of gas holdup as increase of the interfacial area between gas and liquid, which enhances the mass transfer rate. Enhancement of gas holdup during aeration and maintaining of gas hold-up after stopped supply of gas in bubble column by fibrous polypropylene media were investigated in this study. The gas holdup in bubble column were determined with tap water and synthesized dye wastewater with changing number of media line from 0 to 5 lines, the length of media line from 200 mm to 1000 mm versus supplied gas flow rate from 0.3 L/min to 1.1 L/min. Maintaining characteristics of gas hold-up in bubble column after stopped gas supply was observed during 60 min. The results indicate that the fibrous polypropylene media enhanced gas holdup and held gas inside column by bubbles attached on media’s surface with high level and stability for a long time after discontinuing supply of gas. This result is an important phenomenon in chemical reaction of gas and liquid phases that will be able to appllied to improve reaction efficiency in bubble column. Keywords: gas holdup, fibrous polypropylene media, bubble column |
