Bissoy.com
Doctors Medicines MCQs Q&A

Calculate the backwash water volume for the activated carbon filter for the following details. Net Flow: 3000 m3/h. Rise Velocity: 15m/h

Calculate the backwash water volume for the activated carbon filter for the following details. Net Flow: 3000 m3/h. Rise Velocity: 15m/h Correct Answer 800 m3

The area of the filter is calculated based on the flow rate and the rise velocity. Area of the filter is calculated as Flow/ Rise Velocity. Area= 3000/15 =200 m2. Backwash pump velocity is considered as 24 m/hr. Therefore the backwash pump required is area x velocity = 200 x 24= 4800 m3/hr.Backwash is done for 10 mins.Hence the backwash volume = 4800 x 10/60 =800 m3.

Related Questions

Calculate the flow of backwash pump required for the activated carbon filter for the following details. Flow: 2500 m3/h. Rise Velocity: 15m/h Backwash pump velocity: 24 m/h
Calculate the backwash pump required for the activated carbon filter for the following details. Flow: 1000 m3/h. Rise Velocity: 15m/h
Calculate the area of the activated carbon filter for the following details. Flow: 2000 m3/h. Rise Velocity: 15m/h
A rotary drum filter with 30% submergence is used to filter concentrated aqueous slurry of calcium carbonate containing 15lb of solids per cubic foot of water. The pressure–drop is 2011Hg. If the filter cake contains 50% mixture (wet basis), calculate the filter area required to filter 10 gal/min of slurry. The filter cycle time is 5 min. The specific cake resistance depends on the pressure–drop as: α (ft/lb) = α (Δp)0.26, where α = 2.90×1010 Viscosity of the filtrate = 6.72×10-4 lb/ft-s. Density of calcium carbonate = 168.8 lb/ft3. Neglect filter medium resistance.
Calculate the flow rate of the backwash pump to be used for a pressure sand filter with the following data. Flowrate: 2200 m3/h Rise velocity of PSF (Pressure Sand filter): 10 m/h
Calculate the flow rate of the backwash pump to be used for a multimedia filter with the following data. Flowrate: 2200 m3/h Rise velocity of multimedia filter: 18 m/h
Calculate the area of the rapid sand filter for the following details. Flow: 2000 m3/h. Velocity: 5m/h Backwash time: 30 mins
Calculate the length of the rapid sand filter for the following details. Flow: 1000 m3/h. Velocity: 5m/h Backwash time: 30 mins
Calculate the breadth of the rapid sand filter for the following details. Flow: 500 m3/h. Velocity: 5 m/h Backwash time: 20 mins
In the carbonation of a soft drink, the total quantity of carbon dioxide required is the equivalent of 3 volumes of gas to one volume of water at 0⁰C and atmospheric pressure. Calculate (i) the mass fraction and (ii) the mole fraction of the CO2 in the drink, ignoring all components other than CO2 and water. Basis 1 m3 of water = 1000 kg Volume of carbon dioxide added = 3 m3 From the gas equation, pV = nRT 1 x 3 = n x 0.08206 x 273 n = 0.134 mole. Molecular weight of carbon dioxide = 44 And so weight of carbon dioxide added = 0.134 x 44 = 5.9 kg