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Materials Recovery Facility (MRF) Processing Technologies Flashcards

6 cards from real CRP practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

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  1. What is the difference between a 'clean MRF' and a 'dirty MRF'?

    Answer: A clean MRF processes pre-sorted recyclables, while a dirty MRF processes mixed solid waste to extract recyclables

    Clean MRFs (recycling facilities) receive source-separated or single-stream recyclables, while dirty MRFs (mixed-waste processing facilities) sort recyclables from unsorted municipal solid waste.

  2. What is a 'fiber sort cabin' in MRF operations?

    Answer: A quality-control station where workers manually remove contaminants from paper and cardboard streams

    Sort cabins are work stations positioned over conveyor belts where sorters manually pick out contaminants (plastics, trash) from the paper stream to meet end-market quality specifications.

  3. What does 'bale certification' mean in MRF commodity sales?

    Answer: A quality verification process confirming that a bale meets a buyer's material grade and contamination specifications

    Bale certification involves sampling and testing bale composition to verify it meets contractual specifications (e.g., ISRI grades), protecting both the seller's reputation and buyer's processing needs.

  4. What is the role of a 'picking station' or 'sort station' in a manually assisted MRF?

    Answer: Ergonomically designed work positions where sorters stand or sit over conveyor belts to manually remove target materials or contaminants

    Sort stations are designed for worker safety and efficiency, positioning sorters at the right height and speed to effectively remove items from the belt without injury or fatigue.

  5. What is 'anti-wrap' technology in MRF equipment design?

    Answer: Features that prevent flexible films and strings from wrapping around rollers and shafts, which cause jams and damage

    Films, plastic bags, and stringy materials commonly wrap around rollers and drive shafts in MRF equipment; anti-wrap designs include special roller geometries and cutting mechanisms to prevent costly jams.

  6. What is the purpose of an 'air classifier' in MRF processing?

    Answer: To separate light materials (paper, film) from heavy materials (containers, glass) using directed airflow

    Air classifiers use controlled air streams to lift lightweight materials like paper and plastic film while heavier containers and glass fall out, enabling density-based separation.