Smaller operations may wish to make arrangements with an antifreeze recycler to process their antifreeze or establish a relationship with one of the smaller, independently operated, traveling processors. The sludge that is filtered out is disposed of hazardous waste. You can buy filtration units in several sizes depending upon your use. Distillation units heat the antifreeze and separate the water from the ethylene glycol. Through condensation, contaminants end up in a sludge that has to be disposed of as hazardous waste, and the solution is made into new antifreeze.
Most distillation occurs off-site and generally produces higher quality antifreeze than filtration.
Capture all antifreeze drained from radiators and the engine block and store in a sturdy, leak proof container with a secure lid. Do not contaminate antifreeze with engine oil, brake fluid, transmission fluid, hydraulic fluid, gear oil, solvents, or fuels.