The sewage treatment units in which anaerobic decomposition of organic matter is used, are called
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Civil Engineering · all questionsWaste Water Engineering
Waste Water Engineering
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The porosity of sediments in sewer pipes, is usually taken as
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The sludge does not contain waste water from
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Dry weather flow is:
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The pH value of sewage is determined with the help of
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Drop manholes at the junctions of sewer lines, are provided if
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It is customary to design a sewer for D.W.F. on the basis of
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In trickling filter, B.O.D. is reduced to
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The value of Chezy’s constant is used in
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The maximum spacing of manholes specified by Indian standard in sewers upto 0.3 m diameter is
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If n is the rugosity coefficient, r is the hydraulic depth, s is the bed slope of sewer, the velocity of flow in m/sec may be obtained by the formula evolved by
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In a sedimentation tank (length L, width B, depth D) the settling velocity of a particle for a discharge Q, is
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Maximum permissible velocity 1.5 m/sec, is adopted in drains
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Aerobic bacterias
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The quantity of liquid waste which flows in sewers during the period of rainfall, is known
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To prevent settling down of sewage both at the bottom and on the sides of a large sewer, self-cleaning velocity recommended for Indian conditions, is
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Which one of the following gases is most significant as air pollutant?
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The standard B.O.D. of water is taken for
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Dried sewage after treatment is used as
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The sewer which transports the sewage to the point of treatment, is called
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