Oil and sludge collecting tank

Abstract

An oil and sludge collecting tank, which is placed on-site at a food factory or the like that discharges oil-containing wastewater, and which can collect oil and sludge more efficiently from the upper layer of the oil / water separation tank that pools the oilcontaining wastewater, can be provided. The oil and sludge collecting tank T temporarily stores an upper layer of an oil / water separation tank, and collects oil and sludge. The oil and sludge collecting tank T comprises: an upper tank TA into which the upper layer of the oil / water separation tank flows through an inflow pipe; at least one or more lower tank TB that has a smaller volume than the upper tank TA, and that is continuously provided from the bottom surface of the upper tank TA; and a lower tank heating section H2 that heats the lower tank TB.