Applied Math for Wastewater Plant Operators by Joanne K. Price

By Joanne K. Price

With many labored examples, this e-book presents step by step guideline for all calculations required for wastewater remedy. Pertinent calculations are very easily summarized in each one bankruptcy. The textual content covers all of the basic math options and talents wanted for day-by-day wastewater therapy plant operations. The workbook for this ebook can be bought individually or jointly within the utilized Math for Wastewater Plant Operators Set (ISBN: 9781566769891).

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Therefore, when dimensions are given as inches, first convert all dimensions to feet before beginning the Q=AV calculation. 3 +S) The first form is shorter. 5 fps. 1 cfs, what is the depth of the water? xft fQcfs = AVfps There are four variables in Q=AV calculations for rectangular channels: flow rate, width, depth, and velocity. In Examples 1 and 2, the unknown variable was flow rate, Q. However, any of the other variables can also be unknown. 2 of this chapter illustrates calculations when velocity is the unknown factor.

48 gal/cu ft) = 94 gprn 21 I * Refer to Chapter 8, "LinearMeasurement Conversionsn,in Basic Math Concepts. 22 Chapter 2 FLOW AND VELOCITY CALCULATIONS FLOW THROUGH A PIPELINE--WHEN FLOWING FULL The flow rate through a pipeline can be calculated using the Q=AV equation. 785) (D*). Pipe diameters should generally be expressed as feet to avoid errors in terms. , ft 1 Q cfs = Example 11: (Instantaneous Flow) Cl The flow through a 6-inch diameter pipeline is moving at a velocity of 3 ftlsec. What is the cfs flow rate through the pipeline?

4 n o w CONVERSIONS CALCULATIONS Flow rates may be expressed in several different way~ u b i c feet per second (cfs), cubic feet per minute (cfm), gallons per minute (gpm),gallons per day (gpd), etc. as shown in the diagram to the right. FLOW CONVERSIONS USING THE BOX METHOD* To excel in water and wastewater math, it is essential that you be able to convert one expression of flow to any other. The box method was designed to make these conversions easy to visualize. Moving from a smaller box to a larger box requires multiplication by the factor indicated Moving from a larger box to a smaller box requires division by the factor indicated.

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