OTR influenced by stirrer rate and aerotion rate 300 1 VVM 200 1000 RPM 100 0.5 VVM 0 0 500 1000 1500 2000(RPM) 0 0.5 1 (VVM) Effect of stirrer speed(RPM)and aeration rate (VVM)on the oxygen transfer rate according to sulphite oxidation measurements in a 10L stirred tank reactor.The constant parameter is shown on the curve and the varied parameter is on the x-axis. OTR influenced by stirrer rate and aerotion rate