Because these systems are considered closed loops, they avoid the waste characterization process for the reclaimed antifreeze. However, any filters in the recycling equipment do need to be characterized as hazardous or nonhazardous when replaced. Non-closed loop systems are available that connect to a used antifreeze storage drum. Used antifreeze that is mixed with other fluids must be characterized to determine if it is hazardous waste, and disposed of accordingly. Nonhazardous used antifreeze also may be disposed at a landfill that is authorized to accept used antifreeze.
Many landfills have a tank designated for used antifreeze disposal.
Used antifreeze may not be dumped with regular trash, poured into the sewer, or poured onto the ground. Do's and Don'ts for Antifreeze Disposal DO. . . Keep used antifreeze in a covered container and out of the way of animals, who are often attracted to its sweet flavor. Be sure your recycled antifreeze meets manufacturers' warranties for the vehicle you are servicing. Handle filters and other recycling by-products as hazardous waste.