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The effect of a surfactant on oxgen transfer coefficient of bubble aeration was studied using various sizes of bubbles (1.6-8.8mm in diameter). By an additon of sufficient amount of sodium lauryl sulfate (400 ppm) in a 1% NaCl solution, k_L values of bubble aeration were dscreased to about one-fifth of those without the surfactant, irrespective of the size of the bubbles which ranged from 2.6 to 8.8mm in diameter.However, the difference between the k_L values with and without the surfactant became less marked, provided the bubbles were less than about 2 mm in diameter.The k_L values with and without the surfactant were analysed based on two sorts of models. One was the boundary layer theory and the other the penetration theory. The agreements between the experimental data and the calculations from these models were satisfactory, provided also that the bubbles were larger than about 2 mm in diameter.
社団法人日本生物工学会の論文
1964-08-15