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

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