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Two types of experiments have been run, thus far. The first involves creating a partial vacuum in the container without aeration and observing the effects of the vacuum on dissolved oxygen and bubble formation. The procedure for this experiment is relatively simple. While using Easy Data to monitor the pressure, water is pumped out until the pressure reaches -50 to -70 kPA. At that point, the chamber is The apparatus is allowed to sit for a short period of time and is then opened to atmospheric temperature pressure and the dissolved oxygen is monitored and recorded for no more than two minutes. We wish to see a drop of at least 2 mg/L in that period of time. The second involves maintaining a partial vacuum in the container with slight aeration. The flow of air into the container is regulated by a rotameter that takes either lab air or room air. Originally, lab air was being used; however, later experiments involve detaching the air inflow tube into the rotameter and allowing air to be sucked into the apparatus as it would be through the holes in the actual pipe. After the water is aerated under partial vacuum for a period of time, the apparatus is again exposed to atmospheric pressure and data is recorded in the same manner as mentioned before.
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