A flocculator to treat a flow of 90.0 L/s has been constructed with three compartments in...

 

 

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A flocculator to treat a flow of 90.0 L/s has been constructed with three compartments in series, each 300 cm deep, 300 cm wide and 600 cm long. It has been equipped with 6 vertical shaft flocculation paddles in each compartment. When operating, the total electrical energy being consumed is 675 W (675 N.m.s ¹). The energy efficiency of the motor is 60.0 per cent, and the water temperature is 20°C (viscosity = 10³ N.s.m¹²). Camp proposed the product G.t (the 'Camp number') as a dimensionless number, for flocculator design. (a) Determine the Camp number for this system (10 marks) (b) Describe the likely consequences of operating conditions with a significantly increased Camp number (3 marks) (c) Describe the consequences of operating a flocculator with inadequate Camp number (2 marks). A flocculator to treat a flow of 90.0 L/s has been constructed with three compartments in series, each 300 cm deep, 300 cm wide and 600 cm long. It has been equipped with 6 vertical shaft flocculation paddles in each compartment. When operating, the total electrical energy being consumed is 675 W (675 N.m.s ¹). The energy efficiency of the motor is 60.0 per cent, and the water temperature is 20°C (viscosity = 10³ N.s.m¹²). Camp proposed the product G.t (the 'Camp number') as a dimensionless number, for flocculator design. (a) Determine the Camp number for this system (10 marks) (b) Describe the likely consequences of operating conditions with a significantly increased Camp number (3 marks) (c) Describe the consequences of operating a flocculator with inadequate Camp number (2 marks).

Answer rating: 100% (QA)

a To determine the Camp number Gt Flow rate Q 900 Ls Area of each compartment A 300 cm x 300 cm 009 ... View the full answer