IMPROVEMENT OF GAS EXCHANGE EFFICIENCY IN AEROBIC PROCESSING OF NANO-FILTRATION PRODUCTS FROM BUTTERMILK
Journal Title: Вчені записки Таврійського національного університету імені В. І. Вернадського. Серія: Технічні науки - Year 2018, Vol 29, Issue 1
Abstract
The main regularities of oxygen transport in the gas-liquid system in the aerobic treatment of a retentate obtained by nanofiltration of buttermilk ultrafiltration permeate are studied. This product is a valuable nutrient medium for microbiological productions. Mass transfer was studied using a rotating hollow cone design. When the cone was immersed in a liquid and rotated, a thin film was observed. The film and its movement create good conditions for effective dissolution of oxygen. The oxygen concentrations in the liquid are measured as the cone rotates in different modes. Mass transfer of oxygen significantly depends on the frequency of rotation and the depth of immersion of the cone. It is established that with increasing depth of immersion, an increase in the angular velocity of rotation is required for an effective mass change. Specific energy inputs for this design are determined in comparison with a traditional turbine stirrer. The mathematical analysis of the operating principle of the apparatus is carried out. A model of mass transfer is proposed, which adequately reflects the basic laws of oxygen transfer in the gas-liquid system.
Authors and Affiliations
С. Н. Бондарь, А. А. Трубникова, О. Б. Чабанова
Keywords
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