Sludge must be pumped from the primary clarifier to the anaerobic digester at 500 gpm at 4.5 percent solids, from the secondary clarifier to the thickener at 500 gpm at 0.5 percent solids, from the thickener to the anaerobic digester at 100 gpm at 5 percent solids, and from the anaerobic digester to dewatering at 350 gpm at 3.5 percent solids. All pipe is 8 in. in diameter. Distances and fittings are as follows:
Primary sludge: 850 ft, 14 plug valves, 1 check valve, 8 flow-through tees, 24 standard 90° elbows.
Secondary clarifier sludge: 420 ft, 8 plug valves, 1 check valve, 3 flow-through tees, 8 standard 90° elbows (use C = 100).
Thickened sludge: 1200 ft, 14 plug valves, 1 check valve, 9 flow-through tees, 18 standard 90° elbows.
Digested sludge: 520 ft, 6 plug valves, 1 check valve, 3 flow-through tees, 14 standard 90° elbows. Calculate the head loss in the pipe and fillings.
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