Which of the following components of a wastewater treatment plant is designed to facilitate the decomposition of organic material by aerobic microorganisms?
A: bar screen
B: grit settling tank
C: activated sludge tank
D: chlorination
E: ultra violet light array
A: bar screen
B: grit settling tank
C: activated sludge tank
D: chlorination
E: ultra violet light array
举一反三
- Which of the following measure could not improve the settling efficiency in sedimentation tank？ （ ）。 A: To increase the surface area of the tank B: To increase the flow rate C: To improve the performance of flocculation before sedimentation D: To recycle the sludge to improve the size of particles
- For large two-stroke diesel engine, the lubricating oil required for cross head bearing lubrication comes from the_____. A: settling tank B: lubricating oil circulation tank C: Wet sump D: Daily service tank
- Which of the following is not a vehicle brand? A: Benz B: Ferrari C: Jaguar D: Tank
- Particle's settling efficiency is related to _____ in ideal settling tank. A: water depth B: tank length C: surface load D: horizontal flow velocity E: settling time
- Which of the following statements describes the function of an expansion tank in a diesel engine cooling system?（）