The Multilayer Energy Dissipating Inlet Column (MEDIC) in a center-feed
clarifier consists of a plurality of perforated and concentric columns
and a circular cover, which closes the bottom of the multilayer column.
In the wall of each perforated column many flow inlet ports are mounted.
The layout of the flow inlet ports between any two adjacent perforated
columns is staggered to create a puzzled flow path and flow impingement
among the layers of MEDIC. The strong influent jet due to the small
inifluent area in a center-feed clarifier continuously impinges with the
multilayer perforated columns one after another one. The resistance
created by the multiple perforated columns slows down the influent jet
and evenly distributes it among all of the inlet ports in the wall of the
most outside column. The ability of MEDIC to confine the turbulence
entering into clarifiers effectively lowers the dispersed sludge blanket
in clarifiers and increases their capacity.