Kajian empiris perpindahan massa oksigen oleh compressed air aerator dengan analisis dimensi=Empirical Study on Oxygen Mass Transfer by Compressed Air

• Main Author: Perpustakaan UGM, i-lib
• Format: Article NonPeerReviewed
• Published: [Yogyakarta] : Universitas Gadjah Mada 1997
• Subjects: Jurnal i-lib UGM
• Online Access: https://repository.ugm.ac.id/23037/; http://i-lib.ugm.ac.id/jurnal/download.php?dataId=5966
• Institution: Universitas Gadjah Mada

To increase oxygen content in water, a Compressed Air Aerator was used, by process of diffusion with forced convection oxygen was absorbed with a certain rate corresponding to the capability and the magnitude of the existin& power. The objective of this research is to know dominant variables that affect the aerator capability in penetrating the oxygen into the water due to aerator system used, and the relationship betwen those variables. In this research, an empirical approach were used for the solution of the problem and carried out by dimensional analysis with numerical anlysis, program. The results of this research indicated that the performance of Compressed Air Aerator namely the rate of mass transfer coefficient of the oxygen into the water (K) is affected by the air compressed from compressor output (P), the nozle hole diameter (do), density of nozzle number per area unit (r), and depth of the water (H) at conditions of oxygen diffusion coefficient into the water (D), mass density of water (r), surface tension of water (s), viscosity of water (mL), viscosity of air (mG) and acceleration of gravity (g) at held constant. The maximum value of K resulted at P = 50 Psi, do= 1 mm, r = 162/m , dan H = 0.75 m. Betwen the K-observed and K-predicted, by chi-squared test there is not significantly difference at probability 0.032. The equation form of prediction was resulted, after being tested with regression analysis, coefficient of ditermination (R2) = 0.8943. Keyword: oxygen mass transfer - aerator - dimensional analysis