3.3.1 Effect of Gas Flow Rate on Bubble Size
Figure 10 shows the effect of gas flow rate ond av. Higher gas flow rates contribute to larger bubble sizes with dav mainly in the 100 - 300 μm range (Figure S3). With the increase of gas flow rate, the quantity of bubbles gradually increases, and d av also increases. The increase of quantity of bubbles raises the collision frequency of bubbles. Thus, the coalescence of bubbles makesd av increase, and the corresponding quantity of bubbles declines. In terms of gas flow rate is 10 ml/min, the largest quantity of bubbles (~500) is observed.
Figure 10 Effects of gas flow rate on bubble sizes (d av) and quantity at a liquid flow rate of 1.0 ml/min with 10 cm ceramic membrane