Bissoy.com
Doctors Medicines MCQs Q&A

Calculate the amount of sand required for the following data. Flow: 200 m3/h Velocity of dual media filter: 15m/h Height: 0.4 m

Calculate the amount of sand required for the following data. Flow: 200 m3/h Velocity of dual media filter: 15m/h Height: 0.4 m Correct Answer 9237 Kg

First the diameter is calculated by finding the area. Area= 200/15. Diameter= square root (1.27 × 13.33) = 4.11. Amount of sand equals πd2/4. This equals 0.785 x 4.11 x 4.11 x 0.4 x 1750 = 9237 Kg.

Related Questions

Calculate the amount of pebbles required for the following data. Flow: 200 m3/h Velocity of dual media filter: 15m/h Height: 0.6 m
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.
Consider the following statements in respect of slow sand filter and rapid sand filter: 1. The two filters differ in respect of the standards regarding the non-uniformity of the sand used in their filtering media. 2. The two filters do not differ in respect of the effective size of the sand used in them. 3. The two filters differ in respect of their respective under-drainage system. 4. The two filters differ in respect of their respective rate of filtration. Which of the above statements are correct? 
The following are certain operating problems of a rapid sand filter: 1. Sand depth should never be depleted by more than 10 cm. 2. Air binding results due to development of negative head and formation of air bubbles in the filter sand. 3. Water softening with lime-soda leads to incrustation of sand. 4. Bumping of filter bed is caused due to negative head. Which of the above statements are correct?
Consider the following statement. i. The penetration of suspended matter is deep in the slow sand filter ii. The penetration of suspended matter is superficial in the rapid sand filter iii. Coagulation is not required in the slow sand filter Which of the above statement is/are correct?
Consider the following statement. i. The slow sand filter is not efficient in removing turbidity ii. The slow sand filter has a high initial cost iii. Skilled supervision is required in slow sand filter Which of the above statement is/are correct?
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
Which of the following statements are correct pertaining to the value of uniformity coefficient Cu for filter sand? (1) For slow sand filters, Cu = 1.8 to 2.5 (2) For rapid sand filters, Cu = 1.3 to 1.7 (3) For slow sand filters, Cu = 1.3 to 1.7 (4) For rapid sand filters, Cu = 1.8 to 2.5
Calculate the diameter of a dual media filter with the following data. Flow: 2200 m3/hr Velocity: 15 m/hr
Calculate the flow rate of the backwash pump to be used for a dual media filter with the following data. Flowrate: 2200 m3/h Rise velocity of DMF: 15 m/h