During waste water treatment, trickling filter is used for :

During waste water treatment, trickling filter is used for :
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During waste water treatment, trickling filter is used for : A. Primary treatements B. ... C. Secondary anaerobic treatement D. Tertiary treatement
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The type of bacteria which is active in trickling filter during biological treatment of sewage is the __________ bacteria. (A) Anaerobic (B) Saprophytic (C) Aerobic (D) Parasitic

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Last Answer : (C) Aerobic

Fine grit present in sewage is removed in the __________ during sewage treatment. (A) Grit chamber (B) Detritus tank (C) Trickling filter (D) Skimming tank

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Last Answer : secondary treatment

The main pollutant in waste water discharged from a petroleum refinery is oil (both in free and emulsified form). Free oil is removed by (A) Biological oxygen pond (B) Aerated lagoons (C) Trickling filters (D) Gravity separator having oil skimming devices

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The filter over which sewage is sprinkled is called as – (1) Trickling filter (2) Percolating filter (3) Contact bed (4) Intermittent sand filter

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In trickling filter, B.O.D. is reduced to A. 30 to 40% B. 40 to 60% C. 60 to 80% D. 80 to 90%

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Last Answer : ANS: C

In a trickling filter A. Filtration process is used B. Biological action is used C. Neither A. nor B. D. Both A. and B.

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Last Answer : ANS: B

The filter over which sewage is sprinkled is called as (1) Trickling filter (2) Percolating filter (3) Contact bed (4) Intermittent sand filter

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Last Answer : Trickling filter

For treating the sewage of a large city, you will recommend A. A sedimentation tank and an activated sludge treatment plant B. A plant consisting of Imhoff tanks with low rate trickling filters C. Sedimentation tanks with high rate trickling filters D. None of these

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The sewage treatment units in which anaerobic decomposition of organic matter is used, are called A. Imhoff tanks B. Trickling filters C. Sludge sedimentation tanks D. None of these

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Last Answer : (c) In passing the waste product, in the dialyzing solution.

Coal mines drainage waste water (acidic in nature) results from the earth's water percolating through the voids created in coal bed during mining. This polluted water which either drains out naturally to water courses or are removed before starting the mining is (A) Neutralised by alkali treatment (B) Left as such without any treatment (C) Diluted with fresh water to reduce its acidity (D) None of these

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Last Answer : (C) Be located downstream of waste water disposal point 

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