Q. Which of the following methods cannot be used for removing heavy metals from waste water?

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Q. ______________ causes sun block and prevent from reaching lower waters.

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Q. The total fraction from COD that can be biodegraded by microorganisms is rbCOD.

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Q. Which of the following adding would to remove the inorganic forms of phosphate?

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Q. The removal of phosphorous from wastewater involves the unification of __________ and then removal from the solids?

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Q. Enhanced biological phosphorus removal implementation is done in an anaerobic tank.

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Q. Sewage treatment plant for the removal of phosphate in an activated sludge system is called as ________

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Q. Nitric acid is formed during oxidation of ammonia.

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Q. Nitrogen is returned back into the atmosphere by the activity of _________

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Q. Nitrifying bacteria cannot survive at 0° C.

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Q. The optimum growth temperature of nitrifying bacteria is __________

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Q. Bacteria eat a lot of ammonia produced in the fish gills.

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Q. Which of the following bacteria is involved in nitrification of ammonia?

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Q. _____________ bacteria get the energy from oxidation of inorganic nitrogen compounds.

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Q. Which of the following metal catalyst is not used during catalytic oxidation of ammonia?

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Q. Nitrification of ammonia involves two oxidation stages.

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Q. Biological oxidation of ammonia is called as ____________

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Q. Particulate organic nitrogen is termed as the material that can pass through a 0.2-μm filter.

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Q. The total Nitrogen load = (soluble organic nitrogen and ammonia from incoming wastewater) + (nitrogen from Return Activated Sludge) + (nitrogen from recirculation).

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Q. Which of the following process is leads to removal of nitrogen gas from water?

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