CRP Materials Recovery Facility (MRF) Processing Technologies 2

Question 1

What is the purpose of a 'baler' in MRF operations?

Accepted Answer

To compress sorted recyclable materials into dense, uniform bales for efficient transport and storage

Answer

To shred materials before processing

Answer

To wash and dry recyclable materials

Answer

To test the purity of sorted material streams

Question 2

What is a 'ferrous magnet' used for in a MRF, and what materials does it capture?

Accepted Answer

An overhead or pulley magnet that removes steel cans and other iron-containing metals from the conveyor belt

Answer

A device that attracts aluminum using magnetic force

Answer

A safety system that stops the belt if metal is detected

Answer

A screen that separates magnets from recyclables

Question 3

What does 'residual rate' mean in MRF operations?

Accepted Answer

The percentage of incoming material that cannot be recycled and must be sent to disposal

Answer

The amount of material left on conveyor belts after a shift

Answer

The fraction of bales rejected by commodity buyers

Answer

The rate at which equipment needs maintenance

Question 4

What is the advantage of 'near-infrared (NIR) spectroscopy' in plastic sorting at a MRF?

Accepted Answer

It identifies specific plastic resin types by analyzing the unique spectral signatures of their molecular bonds

Answer

It detects the presence of recycling symbols on plastics

Answer

It measures the weight of plastic containers

Answer

It identifies plastics by their color alone

Question 5

What is a 'ballistic separator' used for in a MRF?

Accepted Answer

To separate 2D (flat) materials from 3D (hollow/rigid) materials based on how they bounce and roll on a vibrating screen

Answer

To shoot contamination out of the material stream

Answer

To separate heavy materials from light ones using air jets

Answer

To detect and remove explosive hazards from recyclables

Question 6

In MRF operations, what is 'downtime' and why is it a critical operational metric?

Accepted Answer

Periods when equipment is not operating due to jams, maintenance, or breakdowns, which directly reduces daily throughput and revenue

Answer

The overnight hours when the facility is closed

Answer

Time spent on employee breaks

Answer

The period between material delivery and processing start