The design parameter for flocculation is given by a dimensionless number Gt, where G is the velocity gradient and t is the detention time. Values of Gt ranging from 104 to 105 are commonly used, with t ranging from 10 to 30 mm. The most preferred combination of G and t to produce smaller and denser focus is

The design parameter for flocculation is given by a dimensionless numb

1.	The design parameter for flocculation is given by a dimensionless number Gt, where G is the velocity gradient and t is the detention time. Values of Gt ranging from 104 to 105 are commonly used, with t ranging from 10 to 30 mm. The most preferred combination of G and t to produce smaller and denser focus is
A.	large G values with short t
B.	large G values with long t
C.	small G values with long t
D.	small G values with short t
Answer» B. large G values with long t

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