Q. From which of the following methods can toxic chemicals be removed?

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Q. What is the term used for reuse of sewage sludge?

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Q. In which year was the term Biosolids introduced?

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Q. What is the first step in the sewage treatment process?

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Q. What is the amount of solids released into wastewater by human beings?

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Q. What is the percentage of aerobically digested sludge?

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Q. Wₛ = Wₛₚ + Wₛₛ

What does Wₛₚ stand for in the above equation?

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Q. Sludge from the primary clarifier is ______

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Q. How does the chemical sludge appear?

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Q. How does the activated sludge appear?

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Q. What is the % of dry solids assumed for a primary sludge from a settling tank at the outlet?

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Q. What is the percentage of dry solids assumed for the sludge at the outlet of a centrifuge?

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Q. What is the percentage of dry solids for the primary sludge assumed at the outlet of aerobic digester?

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Q. In the case of anaerobic digestion, what is the percentage of dry solids for the primary sludge considered at the outlet?

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Q. What is the concentration of polymer added to a belt filter press handling the primary sludge?

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Q. Heat treatment involves heating of the sludge. The supernatant from the heat treatment system is rich in ___________

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Q. What is the maximum temperature up to which conditioning can be conducted?

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Q. What is the temperature at which sludge has to be frozen in order to carry out conditioning?

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Q. What is the concentration of solids in the filtrate after thawing and freezing?

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Q. Out of the below given methods which of these have the lowest capital cost?

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