Plant for wastewater treatment

A wastewater treatment apparatus that comprises:

• a reactor vessel having (a) a lower portion that includes an inflow port, (b) an upper portion that includes an outflow port, and (c) a wall that extends between the lower and upper portions and defines an interior volume of the reactor vessel;
• a first separating plate that is positioned in the interior volume of the reactor vessel, and that includes a first plurality of through-holes formed therein;
• a second separating plate that is positioned in the interior volume of the reactor vessel between the first separating plate and the upper portion of the reactor vessel, wherein the second separating plate (a) includes a second plurality of through-holes formed therein, and (b) is vertically separated from the first separating plate by a distance d1;
• a plurality of transferring pipes coupled to the second separating plate and extending from the second separating plate toward the first separating plate, such that fluid passing through the second plurality of through-holes also passes through the plurality of transferring pipes, wherein the transferring pipes have a length d2, wherein d2<d1;
• and
• a plurality of elongate microbe carriers coupled to, and extending between, the first and second separating plates, wherein the plurality of elongate microbe carriers are positioned adjacent to the wall.