Q. What is the expected BOD removal after both primary and secondary treatment?

View solution

Q. What is the monthly concentration of solids produced by secondary sewage effluent?

View solution

Q. What is the wastewater called as after physical and biological removal of solids?

View solution

Q. Biological process is used to remove _______

View solution

Q. Sewage treatment plant is a part of secondary treatment.

View solution

Q. Calculate the volume of the aeration tank required for the following data:

Flow: 800 m³/d
BOD: 1000 mg/L
F/M ratio: 0.15(extended aeration)
MLSS: 3500 mg/L

View solution

Q. The organisms feed on _____ in aeration tanks.

View solution

Q. The sludge particles concentration is increased by the growth of the organism in aeration tanks.

View solution

Q. Mechanical stirring can be done instead of injection of air from the bottom.

View solution

Q. Which are the three ingredients in activated sludge systems?

View solution

Q. How is air pumped in the aerator unit?

View solution

Q. An activated sludge system consists of two components, an aerator and ________

View solution

Q. Which of these is not an alternative to activated sludge treatment systems?

View solution

Q. Where is the sludge at the bottom of the clarifier processed to?

View solution

Q. Which is the next reactor after activated sludge reactor in the treatment process?

View solution

Q. After the treatment, the BOD demand ______

View solution

Q. ________ is treated in activated sludge reactor.

View solution

Q. Why is the sludge aerated?

View solution

Q. Which type of pump is preferred to remove trickling filter humus?

View solution

Q. For removing the digested biosolids which type of pump is preferred?

View solution