...
The initial data collection period was omitted from the analysis since because of the setup conditions the air might have been trapped inside the system. For the subsequent data collection periods, we calculated the content of gas removed per liter of water sent through the sand filter. For reference, the formulas can be found here. For these calculations we used following values:
- radius of the bubble collector column: 1.9 cm
We added fitted a line to each of the runs to see the rate of change of the water level inside the bubble collector when water runs through the sand filter. The value of the linear fit is very close to 1, indicating that the data can be modeled accurately using a linear relationship. Figure 2. and Figure 3. show the linear fit line for the second data collection period, and more detailed graphs can also can be found here.
For these calculations we used following values: