The detention time of a circular tank of diameter d and water depth H, for receiving the sewage Q per hour, is________________?
pH value of sludge during alkaline regression stage, is__________________?
The moisture content of sludge is reduced from 90% to 80% in a sludge digestion tank. The percentage decrease in the volume of sludge, is_______________?
Bio-chemical oxygen demand (BOD) for the first 20 days in generally referred to_______________?
If is the diameter of upper circular portion, the overall depth of New Egg shaped sewer section, Is_____________________?
For evaporation and measurement of settable solids, the apparatus used, is________________?
For design of sewers, percentage of sewage discharge is assumed_____________________?
‘Cowl’ is provided at___________________?
A drop manhole is provided if__________________?
For detecting the nitrates in sewage, the colour may be developed by adding________________?
