Answer Happy

Design the channel for the bar rack for a town's wastewater treatment plant as shown below in Figure 1. Your design should check the approach velocity, velocity through screen, head loss through the clean bar rack, and the allowable head loss assuming 30% blockage is allowed. Slop plate or Bar rack slide gate Plow Flow Stop plato groove or brackets Bar rack Figure 1: Two channels with bar racks Assume the following: Average flow rate at design capacity is 1,501.49 mºd Peak factor is 2.8 Coefficient of roughness n is 0.012 The width of the channel is 0.8 m The slope of the channel is 0.00015 m/m The depth of the water in the channel is 1.2 m The bar space for the bar rack is 20 mm The bar width is 10 mm The empirical discharge coefficient is 1.67 for clean screen, and 1.43 for the partially clogged screen.