Incorporation of Post-Consumer Pizza Boxes in the Recovered Fiber Stream: Impacts of Grease on Finished Product Quality, 20PEERS Conference



Grease and cheese contamination of used pizza boxes has led to misunderstanding and controversy about the recyclability of pizza boxes.  Some collection facilities accept pizza boxes while others do not.  The purpose of this study is to determine whether typical grease or cheese contamination levels associated with pizza boxes impact finished product quality.  Grease (from vegetable oil) and cheese are essentially hydrophobic and in sufficiently high concentration could interfere with inter-fiber bonding resulting in paper strength loss.

Findings from this study will be used to determine the viability of recycling pizza boxes at current and future concentrations in old corrugated containers (OCC) recovered fiber streams.  These findings will also be used to inform the acceptability of pizza boxes in the recycle stream and educate consumers about acceptable levels of grease or cheese residue found on these recycled boxes. 

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Author: Ashok Ghosh; Peter W. Hart; Adele Panek; Tran Nguyen; and Meredith Dooley
Incorporation of Post-Consumer Pizza Boxes in the Recovered
Incorporation of Post-Consumer Pizza Boxes in the Recovered Fiber Stream: Impacts of Grease on Finished Product Quality, 20PEERS Conference
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