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Nara, Leah, and Rebecca went to the plant. Leah investigated why the water height was high in the flow measuring bucket. She discovered that small fish and crustacea were getting into the system and getting plugging the holes. A metal grate was added to the inlet side of the pump from the stream water to filter out large particles and remedy this problem. Nara and Rebecca collected data from runs before and after the improvements to the tank set-up. They also developed a preliminary procedure for "profile runs" in which the tube settlers are moved to various locations within a relatively short period of time in order to develop a floc profile at that time. Rebecca secured the use of the CUWTP laboratory turbidimeter for grab sample testing.
Week of March 31,2008
Sara, Dave and Kevin completed the Plate settler tank design and refined the Sludge blanket design to make the two designs compatible.
April 2, 2008
Rebecca found that turbidimeter pump is in handling the added head that it has to reach without a problem. She changed the alum constants in order to get flocs to form. A = 10, B = 15. She performed some grab samples and found that the turbidity using the grab sample method was about 52% higher than the turbidity readings of the turbidimeters.
April 7, 2008
Sara, Kevin and Dave went to the plant with the sludge blanket tank to design the layout of the two tanks as well as the location of both inlet pipes and the tank leveling tank.
April 10, 2008
Sara, Kevin and Dave met in the lab to finalize the plate settler design and order the parts needed to build the sludge blanket tank.