Managing Used Antifreeze n Minimize Waste Antifreeze Look

Managing Used Antifreeze n Minimize Waste Antifreeze – Look at antifreeze for contaminants, and test for freeze point and p. H. » Fresh ethylene glycol or corrosion inhibitors can be added to adjust these parameters. – Reuse antifreeze when possible - avoid unnecessary disposal of good antifreeze. Used Antifreeze 5 -1 (a)

Managing Used Antifreeze n Antifreeze is Hazardous – If it contains -- Lead or Other Metals – If it contains --- Fuel or Solvents. » Many states regulate used antifreeze as a hazardous waste. n “Safer” Antifreeze – Propylene glycol has been introduced as a “nontoxic antifreeze” » only slightly less toxic to humans and animals. Used Antifreeze 5 -1 (b)

Managing Used Antifreeze – “Safer” antifreeze is hazardous if contaminated with fuel, solvents or lead n Proper Management – Recycle and reuse whenever possible n Improper Management and Disposal – Pouring antifreeze into a floor drain is not good pollution prevention and it is not a good waste management strategy. Used Antifreeze 5 -1 (c)

Managing Used Antifreeze – Never dump antifreeze on the ground, to a storm sewer, or to a body of water. » Children and animals like the sweet taste and can become very ill or even die. Fish kills have resulted from antifreeze in streams. – Never discharge antifreeze to a septic system can interfere with bacteria function Used Antifreeze 5 -1 (d)

Antifreeze Recycling Alternatives n On-vehicle recycling - one car at a time – Unit hooked up to cars - closed-loop recycling system. » Old antifreeze circulated through the recycling unit. » Contaminants are removed by the filters in the equipment » Additives are added to filtered antifreeze Used Antifreeze 5 -2 (a)

Antifreeze Recycling Alternatives n Off-vehicle recycling - antifreeze from many cars is recycled at once. – Used antifreeze collected, stored and put in a recycling unit » Contaminants are removed by ultra-filtration or distillation. » Additives are replenished, and antifreeze can then be reused. Used Antifreeze 5 -2 (b)

Antifreeze Recycling Alternatives n Off-site or on-site recycling by an Antifreeze Recycling Service. – Off-site: service picks up used antifreeze takes it off-site to recycle. » recycled antifreeze is either returned to the company or resold. – On-site: service recycles at the business site Used Antifreeze 5 -2 (c)

Antifreeze Recycling Alternatives » Recycled antifreeze remains at the business. » Dirty filters may or may not be left at the business for disposal » Very likely filters will have high levels of lead and will be hazardous. n Special Note: Check manufacturers' warranties before putting recycled antifreeze into any vehicle to ensure that the use of recycled antifreeze will not invalidate the warranty. Used Antifreeze 5 -2 (d)

Antifreeze Recycling Technologies n Antifreeze Distillation – Antifreeze is put in a still and heated to boiling. – Ethylene glycol vapors rise in a pipe. – The pipe is cooled so the vapors become liquid – Contaminants are left behind in the still – Pure ethylene glycol is collected in a separate container. – Anti-corrosion and other additives and distilled water are added before reuse. Used Antifreeze 5 -3 (a)

Antifreeze Recycling Technologies n Antifreeze Filtration – Chemical Filtration: » chemicals are added to make contaminants settle out before antifreeze is filtered. – Ultra Filtration: » antifreeze is passed through a series of successively finer filters to remove contaminants. – Additives must be replenished in both types of filtration (available from equipment vendors) Used Antifreeze 5 -3 (b)

Antifreeze Recycling Technologies n Antifreeze Recycling Wastes: – In a distillation unit -- a sludge called “still bottoms”. – In a filtration unit -- dirty filters. – Wastes are potentially hazardous » May have high levels of lead, solvents, fuel » Recycling wastes must be tested before disposal. Used Antifreeze 5 -3 (c)

Used Antifreeze 5 -1 ( )