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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 min. the most preferred combination of G and t to produce smaller and denser flocs is
- a)Large G values with short t
- b)Large G values with long t
- c)Small G values with short t
- d)Small G values with long t
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
The design parameter for flocculation is given by a dimensionless numb...
Large G values with short times tend to produce small, dense flocs, while low G values and long times produce large, lighter flocs. Since large, dense flocs are more easily removed in the settling basin, it may be advantageous to vary the G values over the length of the flocculation basin. The small dense flocs produced at high G values subsequently combine into larger flocs at the lower G values. Reduction in G values by a factor of 2 from the influent end to the effluent end of the flocculator has been shown to be effective.
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The design parameter for flocculation is given by a dimensionless numb...
Flocculation design parameter: Gt
The design parameter for flocculation is given by a dimensionless number Gt, where G is the velocity gradient and t is the detention time.
Preferred values of Gt
Values of Gt ranging from 104 to 105 are commonly used, with t ranging from 10 to 30 min.
Preferred combination of G and t
The most preferred combination of G and t to produce smaller and denser flocs is Large G values with short t.
Explanation
Large G values with short t produce smaller and denser flocs because:
- Large G values provide higher shear forces, which help in breaking down the flocs into smaller sizes.
- Short t values allow less time for the flocs to grow, resulting in smaller floc sizes.
- Smaller flocs are better at settling, resulting in denser flocs.
Therefore, the combination of large G values with short t is preferred for producing smaller and denser flocs in flocculation.
The design parameter for flocculation is given by a dimensionless number Gt, where G is the velocity gradient and t is the detention time.
Preferred values of Gt
Values of Gt ranging from 104 to 105 are commonly used, with t ranging from 10 to 30 min.
Preferred combination of G and t
The most preferred combination of G and t to produce smaller and denser flocs is Large G values with short t.
Explanation
Large G values with short t produce smaller and denser flocs because:
- Large G values provide higher shear forces, which help in breaking down the flocs into smaller sizes.
- Short t values allow less time for the flocs to grow, resulting in smaller floc sizes.
- Smaller flocs are better at settling, resulting in denser flocs.
Therefore, the combination of large G values with short t is preferred for producing smaller and denser flocs in flocculation.
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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 104to 105are commonly used, with t ranging from 10 to 30 min. the most preferred combination of G and t to produce smaller and denser flocs isa)Large G values with short tb)Large G values with long tc)Small G values with short td)Small G values with long tCorrect answer is option 'A'. Can you explain this answer?
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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 104to 105are commonly used, with t ranging from 10 to 30 min. the most preferred combination of G and t to produce smaller and denser flocs isa)Large G values with short tb)Large G values with long tc)Small G values with short td)Small G values with long tCorrect answer is option 'A'. Can you explain this answer? for Civil Engineering (CE) 2025 is part of Civil Engineering (CE) preparation. The Question and answers have been prepared according to the Civil Engineering (CE) exam syllabus. Information about 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 104to 105are commonly used, with t ranging from 10 to 30 min. the most preferred combination of G and t to produce smaller and denser flocs isa)Large G values with short tb)Large G values with long tc)Small G values with short td)Small G values with long tCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for Civil Engineering (CE) 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for 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 104to 105are commonly used, with t ranging from 10 to 30 min. the most preferred combination of G and t to produce smaller and denser flocs isa)Large G values with short tb)Large G values with long tc)Small G values with short td)Small G values with long tCorrect answer is option 'A'. Can you explain this answer?.
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 104to 105are commonly used, with t ranging from 10 to 30 min. the most preferred combination of G and t to produce smaller and denser flocs isa)Large G values with short tb)Large G values with long tc)Small G values with short td)Small G values with long tCorrect answer is option 'A'. Can you explain this answer? for Civil Engineering (CE) 2025 is part of Civil Engineering (CE) preparation. The Question and answers have been prepared according to the Civil Engineering (CE) exam syllabus. Information about 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 104to 105are commonly used, with t ranging from 10 to 30 min. the most preferred combination of G and t to produce smaller and denser flocs isa)Large G values with short tb)Large G values with long tc)Small G values with short td)Small G values with long tCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for Civil Engineering (CE) 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for 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 104to 105are commonly used, with t ranging from 10 to 30 min. the most preferred combination of G and t to produce smaller and denser flocs isa)Large G values with short tb)Large G values with long tc)Small G values with short td)Small G values with long tCorrect answer is option 'A'. Can you explain this answer?.
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