The natural process in which the oxygen of water of streams is consumed by sewage and at the same time, it is replenished (filled again) by the atmosphere, is known as

Related MCQs

• The percentage ratio of the oxygen available in sewage to the oxygen required to satisfy one stage of bio-chemical oxygen demand (B.O.D.) is termed as
• The amount of oxygen consumed by sewage from an oxidising agent like potassium dichromate is termd as
• The sanitation system in which a small portion of storm water is allowed to enter in the sanitary sewage sewers and the remaining storm water flows in separate set of sewers, is known as
• When the sewage is to be distributed over a level area surrounded by dykes (i.e. trenches), the mothod of sewage used is called
• The amount of oxygen required for the biological decomposition of dissovled organic solids to occur under aerobic conditions is called bio-chemical oxygen demand (B.O.D.)
• A sewer which receives storm water, surface run-off and sewage is called a
• The water carriage sewage system removes
• The leakage of sewage from the sewer into the soil surrounding the water is called ex-filtration.
• The activated sludge process of sewage treatment
• The bio-chemical treatment of sewage effluent is a process of