Patent ID: 8354027

Claim:
A reactor for biological purification of waste water, the reactor comprising: a reactor vessel having one of a flat and a round bottom; at least one supply pipe arranged in a lower region of said reactor vessel configured for feeding the waste water to be purified into the reactor; at least one fluid discharge pipe fluidly connected to said reactor vessel, said fluid discharge pipe configured for discharging purified waste water from the reactor; at least one solid matter discharge pipe arranged in said lower region of said reactor vessel and configured for discharging solid matter from the reactor; and at least one diverting means positioned in said lower region of said reactor vessel, said at least one diverting means including at least one diagonally extending section and being arranged so that solids sinking to a bottom of the reactor from an upper region of the reactor are deflected in the reactor so the solids settle in a region of said at least one solid matter discharge pipe and are discharged from the reactor through said at least one solid matter discharge pipe, said at least one diverting means being four deflector plates in said lower region of the reactor vessel, wherein two deflector plates of said four deflector plates are connected with each other along a respective side surface of each of said two deflector plates such that said four deflector plates are arranged to form a truncated pyramid.