The invention is directed to a method for flotation separation. The method has
the steps of feeding an influent stream containing liquids and solids to a vessel,
while removing clarified liquid at the same time as the feeding process. The method
employs a step for emptying the solids from the vessel based on the solids having
formed a float blanket of a predetermined depth. The solids are removed from the
vessel through a bottom nozzle as opposed to being skimmed off the top surface
with mechanical separators. The depth of the float blanket can be monitored. Once
it is determined that the float blanket has reached the predetermined depth, the
feed to the vessel is stopped and the vessel is emptied of liquids and solids through
a suitable outlet other than the feed inlet, by an arrangement of valves and lines.
