8 rapid sand filters are used to treat 35 MLD of water with rate of filtration 4000 lit/hr/m². If back washing rate is 4 times rate of filtration and duration of back wash is 15 minutes operated once in every 24 hrs, then the percentage of filtered water required to back wash the filter is

8 rapid sand filters are used to treat 35 MLD of water with rate of filtration 4000 lit/hr/m². If back washing rate is 4 times rate of filtration and duration of back wash is 15 minutes operated once in every 24 hrs, then the percentage of filtered water required to back wash the filter is

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Question

8 rapid sand filters are used to treat 35 MLD of water with rate of filtration
4000 lit/hr/m². If back washing rate is 4 times rate of filtration and duration of back
wash is 15 minutes operated once in every 24 hrs, then the percentage of filtered water
required to back wash the filter is

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Q-24. Civil Engineering problem.
A rapid sand filter is to be provided in a water treatment plant, to process 60 MLD of water for a town. There is a provision of allowing 3% of the filtered water for storage to meet the backwashing requirement. Rate of filtration for the filter system is 20 m3/m2/hr. Each day 20 min of backwashing is done. Then, A Flow of water during filtration is laminar flow and flow of water in case of backwashing is turbulent. B The area of filter unit is 128.75 m2 C The area of filter unit is 130.55 m2 Correct Option Rapid sand filter is less efficient in removing bacteria. Correct Option
Plz, solve this problem one by one and show all the steps. Environmental Engineering-2 An activated sludge process is to be designed to treat a sewage flow of 8640 m3/day with BOD of 200 mg/l from a primary clarifiers using F : M = 0.4 per day and MLSS of 3000 mg/l calculate volume of aeration tank if SVI is 100. How much sludge should be returned (Qr)?
PLS ANSWER ASAP THANKS!
8 rapid sand filters are used to treat 35 MLD of water with rate of filtration 4000 lit/hr/m². If back washing rate is 4 times rate of filtration and duration of back wash is 15 minutes operated once in every 24 hrs, then the percentage of filtered water required to back wash the filter is
If (Qr/Q=120 percent of discharge), effluent BOD concentration=80ppm, volume of filter =825m3 , discharge =50L/sec , The influent BOD concentration equal: Choose one: a. 277.89 b. 277.2 c. 276 d. 275
Be fast / quick.pls.
I need a step by step process on solving this homework question.
A one cell rapid sand filter tank has a loading rate 9.0 m/h, surface dimensions of 15*6 m. The sand and gravel depths are 70 cm and 60 cm respectively. The height of wash trough is 50 cm and the height of water above surface of sand is 2.0 m. Note that Shape factor of sand is 0.80 and stratified bed porosity is 0.50. a) What flow rate (m³/sec) does the filter handle during production? b) What is the total height of filter basin (m)? c) Calculate the head loss if the value of this term [2 (Co fid)] equal to 105700. d) In your opinion this filter tank specified the Saudi specifications?
Can you please help me with the homework problem
Wastewater Engineering civil engineering (9)