Q. Sludge treatment reduces the formation of struvite scales in pipes.

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Q. Which of these is not a method of digestion?

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Q. Anaerobic digestion is carried out in ____

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Q. What is the temperature to be maintained for thermophilic digestion?

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Q. What is the duration of sludge in tanks for mesophilic anaerobic digestion?

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Q. Which of the following is not a product of anaerobic digestion?

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Q. Which of the following is an advantage of anaerobic digestion?

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Q. _________ is an aerobic process of mixing sewage sludge with agricultural by-product sources.

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Q. Which of the following processes is rarely used?

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Q. What is the thickened concentration of the primary sludge?

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Q. What is the thickened concentration of the trickling filter sludge?

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Q. What is the thickened concentration of the thickened sludge from the rotating biological contractor?

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Q. What is the thickened concentration of air activated sludge?

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Q. What is the thickened concentration of extended aeration sludge?

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Q. What is the thickened concentration of high purity oxygen activated sludge?

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Q. What is the thickened concentration of anaerobically digested primary sludge from primary digestor?

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Q. What is the thickened concentration of primary sludge combined with trickling filter humus?

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Q. What is the thickened concentration of primary sludge combined with rotating biological contractor?

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Q. What is the thickened concentration of chemical tertiary sludge( High lime)?

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Q. What is the solid loading rate in kg/ m².d considered while designing a thickener to treat the primary sludge?

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