Q. Secondary treatment reduces BOD, ranges from

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Q. What causes excessive growth of algae and other aquatic plants?

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Q. Addition of hydrogen and removal of oxygen, known as

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Q. Suspended solids and sediments increases turbidity of

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Q. Heavier suspended solids settle down, at point of outfall of waste water, known as:

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Q. Primary treatment reduces BOD, ranges from

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Q. Solubility of oxygen in water is directly proportional to

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Q. 'SOCs' stands for

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Q. Fats, greases and oils are soluble in

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Q. Heated water has a harmful effects on

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Q. What is most common dissolved gas in water?

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Q. Nitrogen in sewage indicates presence of

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Q. What affects velocity and surface expansion of river?

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Q. In first stage of aerobic decomposition, carbonaceous matter is being

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Q. Nitrogen free compound includes:

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Q. Sewage obtained from domestic premises as well as commercial and industrial buildings, known as

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Q. Waste water contains algae, fungi, bacteria and

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Q. Main sources of nitrogen compounds in waste water are proteins, amines, and

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Q. Secondary treatment is carried out for removal of

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Q. Rate of oxidation depends on amount of:

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