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Two contraptions will be made that we will use to simulate different situations to help us determine the best course of action. The team will also be split into two subgroups so that each experiment can have the undivided attention of different team members. The members of each subgroup were decided based on class and work schedules. Tiffany and Tanya will be working on the aeration experiments and Haley and Ling will be focusing on the backwash sand filter. Wenny will be assisting each team interpret the data, contemplating other experiments that can be performed, attending meeting and assisting on written assignments.

MODEL 1: AERATION

Test Aerator Apparatus
The first will consist of a dissolved oxygen probe and a pressure sensor connected to a 4 inch PVC pipe with a suction outlet, a hole for influent water, an air stone and an air inlet line. To drain the system, the water inlet line can be detached over the sink at a valve that can be toggled shut near the source of the water. A partial vacuum can be maintained by pumping the air out of the cylinder via the suction outlet. The device also has a stir bar inside to help us model a complete mix system. As we adjust the pressure in the cylinder, the pressure sensor will allow us to know that the actual pressure is in the pipe. The DO probe will allow us to track the rate at which the oxygen leaves the water. The level of DO needed to keep the flocs from rising to the top of the sedimentation tank in the treatment plants has yet to be determined.

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