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Q. What is Rapid Sand Filter?
A Rapid Sand Filter is a water treatment plant that includes provision for pre treating the water by coagulation and sedimentation for settlement of suspended solids before filtration with sterilization in the final process.
Rapid Sand Filter consists of layers of course sand with an effective size of 0.35 to 0.50 mm is used. The depth of sand layer is 0.60 to 0.75m. This sand is supported on a gravel layer of depth 0.45m in 5 to 6 layers. The effective size of gravel is 2 to 50 mm. Gravel is under by an under drainage system consisting CI central manifold with strainers & lateral.
Plan area of these tank s is 10 to 80 m2 or 6 x 8 m or 8 x 10 m. Rate of filtration of these filter is 3000 to 6000 Lit. /hrs/ m2. The cleaning of Rapid Sand Filter is effected by reversal flow. First air is passed at the rate of 600 - 900 lpm/ m2 at the pressure of 0.35 kg/cm2 for 5 minutes in the reverse direction. After this water is passed which removes the dirt by bubbling action. Water required for back wash 300 to 900 Lit. / hrs/ m2. Cleaning must be done after every 1 to 3 days.
Determine the Depth of Exploration The depth of exploration depends on the following factors: i) Size, type of the structure and loading intensity. ii) Design considerati
My team has to construct a swimming pool at the back of the house. It’s interior dimensions are 10M x 3M and 1M at the shallow end and 2.5M at the deep end. The walls and the bas
#q strain gauge arrangement is used to measuuestion..
some expansion joint(10 mm- 20 mm) on my basement roof.rain water leakage in basement i want the solution of expiation joint and water leakes.
Phases are usually identifiable because of adifference in density which causes gravitational separation. e.g. Ice floats on water, steam rises.
curing of brick masonry
Calculate the Number of Paths, Number of Critical Paths and Project Duration For the project network shown, the total number of paths through the network; number of critical pa
1. Draw the projections of a line AB that is 50 mm long and is parallel to both the HP and the VP. The line is 40 mm above the HP and 25 mm in front of the VP. 2. A line AB, 50 mm
Cleaning and greasing of Rocker & Roller bearings of open web through girders : In case of standard open web through girders, no separate jacking arrangement is required as the en
Q. What are the Parasitic forces for prestressing? In statically determinate structures, prestressing forces will cause the concrete structures to end upwards. Therefore precam
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