A waste oil handling apparatus comprising:
- a handling tank comprising an interior space delimited above a bottom floor of said handling tank between a plurality of perimeter walls upstanding from said bottom floor around a perimeter thereof, and among which first and second side walls reside oppositely of one another;
- and
- a plurality of draining compartments supported on said handling tank with a bottom of each draining compartment residing in elevated relation above the bottom floor of the singular tank, the bottom of each draining compartment having a respective drain therein and each draining compartment being sized and configured to receive and hold a respective waste oil container therein in an inverted state dumping contents of said oil container through said respective drain into the interior space of the handling tank and downwardly toward the bottom floor thereof;
- a plurality of drain ports on the handling tank that fluidly communicate with the interior space thereof, at different respective elevations above the floor of said handling tank and below the bottom of each draining compartment, for respective draining of accumulated tank contents of varying density that have gravitationally separated into distinct layers at said different respective elevations, said plurality of drain ports including at least a primary drain port for draining of an upper waste oil layer from the singular handling tank, and a secondary drain port for draining an underlying antifreeze layer from the singular handling tank, of which said primary drain port fluidly communicates with the interior space of the handling tank at a greater elevation above the bottom floor thereof than said secondary drain port;
- and
- valving installed in operable relation to said plurality of drain ports, and selectively switchable between the following operational states:
- an oil pumping state allowing pumped flow through said primary drain port, while preventing flow through the secondary drain port, thereby enabling pumped drainage of said upper waste oil layer independently of the underlying antifreeze layer;
- and
- an antifreeze pumping state allowing pumped flow through said secondary drain port, while preventing flow through said primary drain port, thereby enabling pumped drainage of said underlying antifreeze layer independently of the upper waste oil layer;
- a first container trough running along said first side wall of the handling tank in elevated relation above, and in directly overhead relation to, the bottom floor of the handling tank, and comprising a first subset of the draining compartments, the bottoms and the respective drains of which both reside internally of said first side wall of the handling tank for direct drainage of the first subset of the draining compartments into the interior space of the handling tank from directly overhead thereof;
- and
- a second container trough running along said second side wall in elevated relation above, and in directly overhead relation to, the bottom floor of the handling tank, and comprising a second subset of the draining compartments, the bottoms and the respective drains of which both reside internally of said second side wall of the handling for direct drainage of said second subset of the draining compartments into the interior space of the handling tank from directly overhead of said interior space;
- whereby a user can load or unload a respective set of waste oil containers at either one of said first and second container troughs from a respective side of the handling tank while another set of waste oil containers already loaded into the other one of said first and second containers troughs is draining into the interior space of the waste oil container adjacent an opposing side of the waste handling tank.