Abstract: An apparatus and a control system for receiving the mud-like discharge from a liquid clarifying vessel and dewatering it into the form of slugs by vacuum means connected to the annular space surrounding a stand pipe connected to the discharge outlet. A timing and control system effects squeeze-out action and discharges the dewatered slugs from a flapper valve on a timed basis, as well as effecting periodic clean-out action.

Abstract: A sphincter cone for water treatment and clarification, which cone involves no moving parts. At the top of the cone there is provided a surge tank with an open bottom surrounded by an annular well extending along the perimeter of a cylindrical extension of the cone. The bottom of the well is tapered downwardly toward an outlet pipe. Water entering the top of the surge tank is distributed downwardly through the surge tank and radially outwardly into the annular well, while the particulate flows downwardly through the apex of the cone where it is formed into small compacted slugs and discharged. A second cone, in series, of similar construction may be used to further clarify the water.