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A horizontal flow primary clarifier treats waste water in which 10%, 60% and 30% of particles have settling velocities of 0.1 mm/s, 0.2 mm/s, 0.2 mm/s, and 1.0 mm/s respectively. What would be the total percentage of particles removed if clarifier operates at a Surface Overflow Rate (SOR) of 43.2 m3/m2.d?
(Answer up to the nearest integer)
    Correct answer is '56'. Can you explain this answer?
    Most Upvoted Answer
    A horizontal flow primary clarifier treats waste water in which 10%, 6...
    Surface overflow rate
    Settling velocity more than 0.5 mm/s will be removed 100% and rest is proportional to their settling velocity.
    ∴ Total percentage of particle removal
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    Community Answer
    A horizontal flow primary clarifier treats waste water in which 10%, 6...
    Calculation:
    The total percentage of particles removed can be calculated using the following formula:

    Total percentage of particles removed = Sum of the percentage of particles removed in each settling velocity category

    Given data:
    - Settling velocity category 1: 10% of particles with a settling velocity of 0.1 mm/s
    - Settling velocity category 2: 60% of particles with a settling velocity of 0.2 mm/s
    - Settling velocity category 3: 30% of particles with a settling velocity of 0.2 mm/s
    - Settling velocity category 4: 1.0 mm/s

    Step 1: Calculate the percentage of particles removed in each settling velocity category.
    - Settling velocity category 1: 10% * 0.1 mm/s = 0.01 mm/s
    - Settling velocity category 2: 60% * 0.2 mm/s = 0.12 mm/s
    - Settling velocity category 3: 30% * 0.2 mm/s = 0.06 mm/s
    - Settling velocity category 4: 100% * 1.0 mm/s = 1.0 mm/s

    Step 2: Calculate the total percentage of particles removed.
    Total percentage of particles removed = 0.01 + 0.12 + 0.06 + 1.0 = 1.19 mm/s

    Step 3: Calculate the surface overflow rate (SOR) in m3/m2.d to mm/s.
    1 m3/m2.d = 1,000,000 mm2/m2.d
    43.2 m3/m2.d = 43,200,000 mm2/m2.d
    SOR = 43,200,000 mm2/m2.d

    Step 4: Calculate the total percentage of particles removed at the given SOR.
    Total percentage of particles removed = (1.19 mm/s * 100) / 43,200,000 mm2/m2.d
    Total percentage of particles removed = 0.00275%

    Step 5: Round the total percentage of particles removed to the nearest integer.
    Total percentage of particles removed ≈ 0.00275% ≈ 0%

    Answer:
    The total percentage of particles removed is approximately 0%.
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    A horizontal flow primary clarifier treats waste water in which 10%, 60% and 30% of particles have settling velocities of 0.1 mm/s, 0.2 mm/s, 0.2 mm/s, and 1.0 mm/s respectively. What would be the total percentage of particles removed if clarifier operates at a Surface Overflow Rate (SOR) of 43.2 m3/m2.d?(Answer up to the nearest integer)Correct answer is '56'. Can you explain this answer?
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    A horizontal flow primary clarifier treats waste water in which 10%, 60% and 30% of particles have settling velocities of 0.1 mm/s, 0.2 mm/s, 0.2 mm/s, and 1.0 mm/s respectively. What would be the total percentage of particles removed if clarifier operates at a Surface Overflow Rate (SOR) of 43.2 m3/m2.d?(Answer up to the nearest integer)Correct answer is '56'. Can you explain this answer? for Civil Engineering (CE) 2024 is part of Civil Engineering (CE) preparation. The Question and answers have been prepared according to the Civil Engineering (CE) exam syllabus. Information about A horizontal flow primary clarifier treats waste water in which 10%, 60% and 30% of particles have settling velocities of 0.1 mm/s, 0.2 mm/s, 0.2 mm/s, and 1.0 mm/s respectively. What would be the total percentage of particles removed if clarifier operates at a Surface Overflow Rate (SOR) of 43.2 m3/m2.d?(Answer up to the nearest integer)Correct answer is '56'. Can you explain this answer? covers all topics & solutions for Civil Engineering (CE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A horizontal flow primary clarifier treats waste water in which 10%, 60% and 30% of particles have settling velocities of 0.1 mm/s, 0.2 mm/s, 0.2 mm/s, and 1.0 mm/s respectively. What would be the total percentage of particles removed if clarifier operates at a Surface Overflow Rate (SOR) of 43.2 m3/m2.d?(Answer up to the nearest integer)Correct answer is '56'. Can you explain this answer?.
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