Antifreeze Recycling Technology Guide

Capabilities & Limitations

Process	Removes Oil, Dirt, and Metals	Removes Salts	Byproducts	Meets ASTM/OEM	Notes
EET CRS	Yes	Yes	Byproducts rendered non-hazardous	Yes	Best membrane-based process for application; sewer needed for brine discharge
Gravity and Centrifugal Separation	Yes, when used with chemicals	No	Produces sludge	No	High chemical consumption; inadequate contaminant removal
Particle Filtration	Yes, when used with chemicals	No	Cartridge filters	No	Least expensive method; inadequate contaminant removal
Ultrafiltration	Yes	No, Passes ions	Concentrated Reject	No	Rejects organics over 1,000 MW; reject difficult to further manage
Nanofiltration	Yes	Only large and multivalent species are rejected	Concentrated Reject	No	Does not reject monovalent species such as chloride & organic acids; reject dificult to further manage
Ion Exchange	Yes, when used with pre-filter and chemicals	Yes	Spent filters/resins	Yes	IE resins exhaust quickly; high operating cost; boron can pass-through and cause low/buffered pH
Vacuum Distillation	Yes	Yes	Still bottoms	Yes	Makes concentrate product; high energy & install cost; slow process; boron and hydrocarbon carryover; still bottoms difficult to further manage