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Data was recorded for Sand 30 with each of the parameters specified in Procedure. The results of the experiment can be downloaded here in the form of the Excel sheet. The content of the gas removed during all runs stays consistent. However, it The uniform results might indicate reliable functioning of the components of the system. As opposed to Experiment 1, no clogging was witnessed at this time.
However, the removed gas content is still a bit lower than the result from the Fluidized Bed Experiment done last semester, when the measured content of gas removed was 3.23 mL/L. The fluidized bed experiment involved the same sand parameters: Sand 40, depth = 60cm, bed expansion = 50%, aerator air pressure = 100kPa, except for the flow rate, which was 345 mL/min. The possible cause of the difference in results might be the experimental setup, which was modified since the last semester. It is possible The modifications include replacing the aerator with a new one. Perhaps it might be the case that the current aerator might not be producing water that is supersaturated enough. That might affect the environment in which bubbles are formed, and thus indicate why only 2.00 mL/L of gas is formed. To get additional insights, we measured the dissolved oxygen content at three various points in the system. Detailed information can be found here.