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Wiktionary
materials recovery facility

n. A waste recycling plant. Often shortened to MRF

Wikipedia
Materials recovery facility

A materials recovery facility, materials reclamation facility, materials recycling facility or Multi re-use facility (MRF - pronounced "murf") is a specialized plant that receives, separates and prepares recyclable materials for marketing to end-user manufacturers. Generally, there are two different types: clean and dirty MRFs.