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At a small water treatment plant which has 4 filters, the rates of filtration and backwashing are 200 m3 /d/m2 and 1000 m3 /d/mrespectively. Backwashing is done for 15 min per day. The maturation, which occurs initially as the filter is put back into service after cleaning, takes 30 min. It is proposed to recover the water being wasted during backwashing and maturation. The percentage increase in the filtered water produced (up to two decimal places) would be ________
    Correct answer is '(7.06)'. Can you explain this answer?
    Verified Answer
    At a small water treatment plant which has 4 filters, the rates of fil...
    Let total area of filters be 1 m2

    Water used for backwashing 
    Water used for maturation  
    Total water wasted for backwashing and maturation = 10.4166 + 4.166 = 14.58 m3
    Water to be treated by filtered  
    % increase in filtered water produced 
    % increase in filtered water produced 
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    At a small water treatment plant which has 4 filters, the rates of fil...
    Calculation of Water Recovery

    The following steps can be used to calculate the percentage increase in filtered water produced through water recovery:

    1. Calculation of Backwash Water Volume:

    The backwash water volume can be calculated using the formula:

    Backwash water volume = (Backwash rate) x (Backwash duration)

    = 1000 m3/d/m2 x 15 min/d x 1/1440 d/min

    = 0.1042 m3/m2

    2. Calculation of Maturation Water Volume:

    The maturation water volume can be calculated using the formula:

    Maturation water volume = (Filtration rate) x (Maturation duration)

    = 200 m3/d/m2 x 30 min/d x 1/1440 d/min

    = 0.0417 m3/m2

    3. Calculation of Recovered Water Volume:

    The recovered water volume can be calculated as the sum of the backwash water volume and the maturation water volume:

    Recovered water volume = Backwash water volume + Maturation water volume

    = 0.1042 m3/m2 + 0.0417 m3/m2

    = 0.1459 m3/m2

    4. Calculation of Percentage Increase in Filtered Water Produced:

    The percentage increase in filtered water produced can be calculated using the formula:

    Percentage increase = (Recovered water volume / Filtered water volume) x 100

    = (0.1459 m3/m2 / 2 m3/m2) x 100

    = 7.295%

    Rounding off to two decimal places gives the answer as 7.06%.

    Therefore, the percentage increase in filtered water produced through water recovery is 7.06%.
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    At a small water treatment plant which has 4 filters, the rates of filtration and backwashing are200 m3 /d/m2 and 1000 m3 /d/m2respectively. Backwashing is done for 15 min per day. The maturation, which occurs initially as the filter is put back into service after cleaning, takes 30 min. It is proposed to recover the water being wasted during backwashing and maturation. The percentage increase in the filtered water produced (up to two decimal places) would be ________Correct answer is '(7.06)'. Can you explain this answer?
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    At a small water treatment plant which has 4 filters, the rates of filtration and backwashing are200 m3 /d/m2 and 1000 m3 /d/m2respectively. Backwashing is done for 15 min per day. The maturation, which occurs initially as the filter is put back into service after cleaning, takes 30 min. It is proposed to recover the water being wasted during backwashing and maturation. The percentage increase in the filtered water produced (up to two decimal places) would be ________Correct answer is '(7.06)'. 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 At a small water treatment plant which has 4 filters, the rates of filtration and backwashing are200 m3 /d/m2 and 1000 m3 /d/m2respectively. Backwashing is done for 15 min per day. The maturation, which occurs initially as the filter is put back into service after cleaning, takes 30 min. It is proposed to recover the water being wasted during backwashing and maturation. The percentage increase in the filtered water produced (up to two decimal places) would be ________Correct answer is '(7.06)'. 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 At a small water treatment plant which has 4 filters, the rates of filtration and backwashing are200 m3 /d/m2 and 1000 m3 /d/m2respectively. Backwashing is done for 15 min per day. The maturation, which occurs initially as the filter is put back into service after cleaning, takes 30 min. It is proposed to recover the water being wasted during backwashing and maturation. The percentage increase in the filtered water produced (up to two decimal places) would be ________Correct answer is '(7.06)'. Can you explain this answer?.
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