Civil Engineering :: Waste Water Engineering
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Aerobic bacterias
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The rate of accumulation of sludge in septic tanks is recommended as
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If 2% solution of a sewage sample is incubated for 5 days at 20°C and depletion of oxygen was found to be 5 ppm, B.O.D. of the sewage is
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If D is the diameter of upper circular portion, the overall depth of a standard egg shaped section, is
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If the diameter of sewer is 225 mm, the gradient required for generating self cleansing velocity, is
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Pick up the correct statement from the following :
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The non-clog pump which permits solid matter to pass out with the liquid sewage, is
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Assertion (A) : Discharging the effluents from the oxidation ponds just up stream of lakes or reservoirs is undesirable.
Reason (R) : The discharged algae get settled in the reservoirs and cause anaerobic decomposition and other water qualities.
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The width of a rectangular sewer is twice its depth while discharging 1.5 m/sec. The width of the sewer is
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