Abstract: The present invention is directed to a mobile sink assembly including a container partitioned into two compartments with an overflow aperture in a dividing wall providing fluid communication between an upper compartment and a lower compartment. There is a first trap in the top opening of the upper compartment and a second trap positionable below the first trap. There is a riser and valve assembly coupled to the draining aperture in the first trap and configured to control a flow of liquid from the first trap. There is a pump that pumps fluid from the lower compartment to the first trap. In this way water recirculates through the traps while particulate matter is retained in the first and second traps.

Abstract: The present invention is directed to a sink assembly that can separate particulate contaminants from a liquid in which they are suspended. The sink assembly includes a master trap and at least a first trap with a riser and valve assembly to collect particulates and prevent overflow from the master trap. The sink assembly provides a simple maintenance and cleaning solution.