Environmental Biotechnology章节测试课后答案2024春

第六章测试

1.What is the purpose of the effluent recycle line in two-phase system of fluidized-bed? ( )
A:increase the bed turbulence B:control the BOD loading in influent C:support oxygen by oxygenator system D:control the upward flow velocity
答案:CD
2.In biological contactors (RBC), the percent submergence is too high and might lead to ( ).
A:oxygen deficit B:higher suspend sludge C:odor D:lower COD in effluent 3.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. ( )
A:对 B:错 4.The changing of influent (Q) is usually controlled to chang the surface loading of trickling filters and biological tower. ( )
A:对 B:错 5.The medium will not move extensively when it is uniform in fluidized-bed reactor. ( )
A:对 B:错