The effluent of a septic tank is
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Waste Water Engineering
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5 days-biochemical oxygen demand (BOD5) is taken at a temperature of
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The bottom of the sewage inlet chamber of septic tanks, is provided an outward slope
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Drop manholes are the manholes
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For laying a sewer line in a trench of 2 m width, an offset line is marked on the ground parallel to the given centre line at a distance of
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The rainfall at any place may be determined by
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The clarigesters are
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If the grit in grit chambers is 4.5 million litres per day, its cleaning is done
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In R.C. sewer pipes, the percentage longitudinal reinforcement to the cross-sectional area of concrete is kept
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A manhole is classified as shallow if its depth is between
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R.M.O. expenses include
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15 cumecs, the depth d and width are related by For drains up to
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The settling velocity of the particles larger than 0.06 mm in a settling tank of depth 2.4 is 0.33 m per sec. The detention period recommended for the tank, is
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The discharge per unit plan area of a sedimentation tank, is generally called
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The recommended detention period for grit chambers is
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Clogging of sewers, is caused due to
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A rainfall may be classified as acidic if its pH value is less or equal to
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In very first stage of decomposition of the organic matter in sewage
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The layers of vegetable wastes and night soil alternatively piled above the ground to form a mound, is called
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Flocculated particles do not change their
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