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

View solution

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

View solution

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

View solution

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

View solution

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

View solution

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

View solution

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

View solution

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

View solution

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

View solution

Q. The range of organic loading in kg/hectare metre/ day in a high rate trickling filter is ___________

View solution

Q. The expression of the recirculation factor F is given by ___________

View solution

Q. The size of filter media in a high rate trickling filter is ___________

View solution

Q. Recirculation increases the efficiency of high rate trickling filters.

View solution

Q. The surface loading rate of a secondary clarifier is ______ litres/m²/day.

View solution

Q. The detention period of a secondary clarifier is ___________

View solution

Q. Which of the following is the cause of rising sludge?

View solution

Q. The minimum weir loading rate of primary clarifier is ____m³/m/day.

View solution

Q. Hopper bottom vertical flow type tank is _____ in shape.

View solution

Q. Which of the following is called as air diffusion method?

View solution

Q. The maximum quantity of air required in diffused aerator is ______ m³ per million litres of sewage.

View solution