第六章单元测试
- What is the purpose of the effluent recycle line in two-phase system of fluidized-bed? ( )
- In biological contactors (RBC), the percent submergence is too high and might lead to ( ).
- The microbial population in biofilm and activated sludge are different in species owing to the differences in the microorganism accumulated formation, although there are same electron donors and acceptors. ( )
- The changing of influent (Q) is usually controlled to chang the surface loading of trickling filters and biological tower. ( )
- The medium will not move extensively when it is uniform in fluidized-bed reactor. ( )
A:control the BOD loading in influent
B:increase the bed turbulence
C:control the upward flow velocity
D:support oxygen by oxygenator system
答案:control the upward flow velocity
###support oxygen by oxygenator system
A:odor
B:oxygen deficit
C:higher suspend sludge
D:lower COD in effluent
A:错 B:对
A:错 B:对
A:错 B:对
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