Construction
Artificial lagoon-type skimmer chamber for accumulation/separation of light and medium viscosity oils, with pump-controlled weir displacement. Runs with most variable speed vacuum pumps (max 30 m3/hr).

Operating principle
The river current drives surface oil/water into the Circus chamber and maintains
a circular flow in the chamber where the incoming water is balanced by an outgoing flow beneath it. The oil accumulates on the surface to form a layer sufficiently thick for the weir skimmer in the Circus center to skim and discharge oil with very little free water.

Logistics
Rugged yet light - carried and deployed by two persons, off a quay, shore, or over the side of a work boat.