is fitted with adjustable slots to allow for the proportionate flows of all liquids coming into and going out of the clarifier tank and allows for the differential in flow rates between the inner and outer circumferential volumes of the cylindrical tank contents of the clarifier the lower radial compartment of the rotating arm which collects the precipitate may also be fitted with angled scraper blades that direct the settled precipitate towards the central hub through the rotational movement of the arm on the base of the cylindrical clarifier tank bottom the lower trailing skirt edge of the lower radial compartment where it moves over the base of the cylindrical clarifier tank body bottom is fitted with a flexible wiper seal to contain the precipitate in this radial compartment the rotating arm assembly together with either its integral central hub of concentric annual compartments or as in the latter embodiment with its mixed juice infeed pipe manifold is pivoted in the center of the cylindrical clarifier tank body and is driven at a fixed rotational speed by means of either a central or peripheral drive the rotational speed of the arm assembly in the clarifier will dictate the residence time.