The invention relates to the technical field of domestic
sewage treatment, in particular to urban domestic
sewage treatment equipment which is characterized in that
sewage sequentially flows through a front filter tank, an anaerobic tank, an anoxic tank, an
aeration tank, a
sedimentation tank and a disinfection tank to be treated, efficient purification is achieved by a
system, the front filter tank is of a multi-layer grid structure, and the filter
caliber of the multi-layer grid structure is gradually reduced; a set of cleaning mechanism is arranged at the top of each layer of grille and controls a collecting box to move up and down along the upstream face of the grille through a lifting driving
assembly, meanwhile, two cleaning
brush rollers arranged at an inlet of the collecting box rotate inwards in opposite directions, and in the rotating process, hard bristles on the
brush rollers can effectively remove
dirt attached to the surface of the grille. When the bristles are rotated into the collecting box along with the
brush roller, the hard bristles can contract inwards, so that residual impurities hooked on the bristles can be automatically stripped, and the problems that a traditional cleaning brush roller is easy to remain
dirt and is difficult to self-clean are thoroughly solved.