They understand the （） of automatic sludge discharging of the purifierBut they are not good in practice.

In the oil purifier, the interface move outside the top disc, the oil will escape through_____. A: the sludge passage B: the sludge outlet C: the observe glass passage D: the water outlet

智慧职教: Sequencing Batch Reactor ；Activated Sludge Process指（ ）

The term OIL as used in the Oil Pollution Regulations means（）. A: fuel oil B: sludge C: oil refuse D: All of the above

In zone settling, sludge surface is between _____ . A: clean water zone and isoconcentration zone B: isoconcentration zone and transition zone C: transition zone and compression zone

Which substance is NOT considered to be Oil under the pollution prevention regulations? （） A: Petroleum and fuel oil B: Sludge C: Oil mixed with dredge spoil D: Oil refuse and oil mixed with waste

污泥中的水包含_____。The water in the sludge contains _____. A: 游离水Free water B: 毛细水Capillary water C: 附着水Attached water D: 外部水External water

When fuel enters the crankcase of a diesel engine, it （） A: dilutes the lube oil and reduces its viscosity B: forms sulfuric acid in the lube oil C: causes pitting and failure of the bearings D: causes sludge deposits on valve stem

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

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