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Head loss through the external tubing was then calculated given user input for the the desired length of the tubing. The calculations were similar to those above. The total head loss through the system then can be defined as the summation of the head loss through the orifices plates and the head loss through the wider, encompassing tubing.
Using this information, the necessary flow of alum from the doser based on dimensions given above is determined. Using a required dose concentration of 1.5 mg/L in the untreated water, the necessary stock concentration located in the alum doser can be calculated.
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