Q. The filter material used in contact bed is ___________

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Q. Which of the following is called as contact bed?

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Q. How many types of trickling filters are used in sewage treatment?

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Q. The depth of the filter media of intermittent filter is ___________

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Q. Which of the following filter is used in the anaerobic treatment of sewage?

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Q. The maximum size of filter media of a percolating filter is ___________

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Q. The recirculation ratio for the low rate trickling filter is ___________

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Q. The breaking of the biomass from the slime layer in conventional filter is called _____

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Q. The minimum hydraulic loading of percolating filter is ___________

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Q. Which of the following is called as a conventional trickling filter?

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Q. The BOD after the filtration of sewage from the low rate trickling filter is ___________

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Q. The efficiency of a percolating filter is given by ___________

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Q. The removal of BOD is independent of the loading conditions in infiltration process.

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Q. The organic loading in low rate trickling filter is 900 kg/hectare-meter/day. What is the efficiency of the filter?

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Q. The organic loading in a trickling filter is measured in ___________

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Q. The hydrogen sulfide gas formed during the filtration of sewage can be removed by ___________

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Q. The recirculation factor in a low rate trickling filter is ___________

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Q. The maximum removal of suspended and dissolved impurities from the sewage is?

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Q. The color of the secondary sludge produced from the high rate trickling filter is ___________

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Q. _______ is the ratio of volume of recirculated sewage to the raw sewage.

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