Q. To remove 3% primary sludge which of the following size of mesh of a cyclone gritter is used?

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Q. Which of the following methods is used for stabilization of the sludge?

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Q. Sludge is composed of liquid components alone.

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Q. How many types of sludge are present?

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Q. _______ is a term used for reuse of sewage sludge.

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Q. Biosolids are the inorganic wastewater solids.

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Q. Who introduced the term biosolids?

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Q. Which year was the term biosolids introduced?

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Q. Which of the following processes is not used for water reduction?

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Q. Sand drying bed is used for filtration.

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Q. How many products are obtained after dewatering?

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Q. The liquid has high contents of phosphorus and nitrogen, if the sludge has been______

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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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