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FReTA was constructed by the lab tube floc team for the plant and can be used in future semesters. FReTA measures the rate of change in turbidity as opposed to just measuring the turbidity at a specific point in the flocculator. This is advantageous because the the change in turbidity rate is comparable to the settling velocity.
Troubleshooting
air in the tube flocculator
Air often gets caught in the connection between the 1/4 line drawing water from the tank. To resolve this issue the peristaltice pump used to sample from the sed tanks was used to provide pressure to remove air. Additionally the joint was sealed with tape to make it air tight. FIGURE >>>>>
For additional information on flocculator issues see Flocculator Maintenance