Q. Effective preliminary treatment can also be used to remove the ____

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Q. Which of the following factors doesn’t influence biological treatment efficiency?

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Q. Which of the following has the potential to ‘rough’ high strength industrial effluents prior to sewage discharge?

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Q. Rotating biological contractors is used for carbonaceous oxidation as a ________

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Q. Organic overloading is a major problem associated with Rotating biological contractors.

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Q. Absorbing oxygen from the air and pollutants from the wastewater can be decomposed aerobic microorganisms by which of the following methods?

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Q. Up flow anaerobic sludge blanket reactor is an anaerobic digester which is used for wastewater treatment with the help of suspended sludge blanket filters.

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Q. Activated sludge is a type of wastewater treatment method for the treatment of sewage or industrial wastewaters using aeration and a microbial floc.

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Q. Which of the following is low energy consuming system for waste water treatment?

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Q. ___________ is a natural method of waste water treatment.

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Q. Which of the following is the main source for eutrophication of surface water?

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Q. Amino nitrogen and heterocyclic nitrogen can be degraded by biological method by first converting it into ______________

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Q. Which of the following process is not involved in the removal of nitrogen?

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Q. Autotrophic nitrification leads to formation of nitrate by conversion of ammonia.

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Q. Which of the following is not an after effect of accumulation of nitrogen and phosphorus in aquatic ecosystem?

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Q. Which of the following genera the nitrifying bacteria doesn’t belong to?

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Q. The optimal removal of phosphate by biological method should have a COD/P ratio of 20g COD/g of phosphate.

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Q. Ferrous ions can supplement biological phosphate removal.

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Q. Expand OLNAD.

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Q. The major disadvantage of heterotrophic nitrification is ____________ for final disposal.

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