Airlift reactor Aerobic submerged reactor Features - aerobic submerged reactor - external circulation - investigation of characteristic properties Learning objectives/experiments - influence of the superficial gas velocity on: -- gas content -- mass transfer coefficient -- mixing time -- superficial fluid velocity Specification [1] determination of important characteristic variables at the airlift reactor [2] transparent airlift reactor with external recirculation [3] compressed air for generation of air bubbles to recirculate the reactor contents [4] adjustment of the superficial gas velocity via a valve and mass flow controller [5] nitrogen to remove the oxygen from the reactor content [6] determination of the superficial liquid velocity via the conductivity [7] determination of the mixing time with indicator and colour change method [8] sensors for measuring the conductivity, oxygen content, pressure and flow rate [9] GUNT software for data acquisition via USB under Windows 10 Technical data Airlift reactor - riser: Ø 180mm - downcomer: Ø 60mm - height: 2000mm Measuring ranges - conductivity: 4x 0...100mS/cm - oxygen concentration: 2x 0...10mg/L - pressure: 0...3bar - flow rate: -- 0,06...3m3/h (water) -- 1...10m3/h (gas) 230V, 50Hz, 1 phase 230V, 60Hz, 1 phase; 120V, 60Hz, 1 phase UL/CSA optional LxWxH: 1850x790x2450mm Weight: approx. 300kg