The invention relates to a multistage
moving bed biomembrane reactor belonging to devices for treating urban domestic
sewage, medium and low-concentration chemical
wastewater and food
wastewater. The multistage
moving bed biomembrane reactor is mainly used for treating the urban domestic
sewage, the medium and low-concentration chemical
wastewater and the food wastewater and comprises a plurality of
aeration basins partitioned by partition boards, the length-width ratios of the
aeration basins vary with the change of the types of
sewage to be treated, and a novel suspending carrier, an
aeration device, a mud discharging tube, a water inlet tube and an overflow weir are respectively arranged in each aeration basin. The reactor integrates the advantages of a plug flow reactor and a
continuous stirred tank reactor, not only prevents the phenomenon of filler accumulation in the plug flow reactor, but also solves the problems that because the sewage concentrations at the water inlet end and the water outlet end in the
continuous stirred tank reactor are approximate, microorganisms are always in a logarithmic phase or a
stationary phase, and the maturation of the microorganisms are insufficient, which causes a poor
treatment effect. The invention has the advantages of simple structure, science and reasonability, high treatment efficiency, stable
water discharge, wide application range and the like.