03045nas a2200421 4500 20260818171116.0 271098s1981 th r 000| eng d .b1048663x AIT Thesis no.EV-81-14 Lo, Yee Kin Oxygen transfer mechanism in rotating contactors Bangkok : Asian Institute of Technology, 1981 66 leaves : ill. Thesis ; no. EV-81-14 A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science, School of Environment, Resources and Development Thesis (M.Sc.) - Asian Institute of Technology, 1981 Because of its peculiar design, the rotating disc con tac tor is expected to be a different oxygen transfer system from other aeration devices. Evaluation of the oxygen supply of this particular system requires an insight into the mass transfer processes involved. In this thesis, a model of the oxygen transfer mechanism in rotating contactors is presented. Verification is made by comparison of experiment with theory on the results of rates of increase in oxygen concentrations of the bulk water. Accordingly, general equation which has been successfully employed for determining oxygen transfer coefficients is justified. This approach has not been followed by any previous workers before. The matching of aeration patterns from simulation and experiment validated the model, but, lower values of the transfer rates arise due to the neglection of surface aeration. Assumption of Cs as saturation concentration of oxygen in water in common practice is erroneous as applied to rotating contactors. Nevertheless, the error may be small and correlation of transfer coefficients so obtained with disc rotating velocity and radius is established. Sewage Purification Rotating disc process Watanabe, Yoshimasa, Chairperson Chongrak Polprasert, Co-Chaiperson Lohani, B.N., Examination Committee The Keidanren, Japan, Scholarship Donor Asian Institute of Technology. Thesis ; no. EV-81-14 Full-Text http://203.159.5.9/ait-thesis/detail.php?q=B21608 .b1048663x mnait x 250106 2 951012 m a x 0 mnait mnait mnarc 22 40 20 Barcode : 30050120655799 CREATED : 2014-04-02 RECORD # : i12756581 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 Barcode : 30050160084678 CREATED : 2016-04-05 RECORD # : i12968584 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 Barcode : 30050121075245 CREATED : 2023-03-16 RECORD # : i13438591 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 85055 85055 0 0 0 0 MAIN MAIN mnait 2026-08-18 50.00 0 AIT Thesis no.EV-81-14 30050120655799 2026-08-18 17:11:16 3 2026-08-18 22 0 0 0 0 MAIN MAIN mnarc 2026-08-18 0 AIT Thesis no.EV-81-14 30050160084678 2026-08-18 17:11:16 2026-08-18 40 0 0 0 0 MAIN MAIN mnait 2026-08-18 50.00 0 AIT Thesis no.EV-81-14 30050121075245 2026-08-18 17:11:16 1 2026-08-18 20