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The shift toward alternative binders made from renewable resources—such as waste cooking oil—is unavoidable as a replacement for fossil bitumen. Through the maleinization process, waste cooking oil gains viscoelastic properties similar to those of traditional bitumen. However, using modified waste cooking oil (MWCO) in biobinders raises concerns about aging resistance and, especially, microbial growth. This study examines how microorganisms affect MWCO compared to conventional bitumen. Biodegradability tests suggest that fossil bitumen is more susceptible to bacterial growth than MWCO. No break of molecular chain is highlighted and the surface analysis using FTIR-ATR does not allow to detect any changes in chemical composition of the materials. Further analysis is needed to fully understand these findings.

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Study of the Biodegradability of an Alternative Bio-Binder

  • 会议论文

  • 发表日期：

    2026年

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  • Marielle Guéguen Minerbe,
  • Emlyne Durand,
  • Fabienne Farcas

摘要

The shift toward alternative binders made from renewable resources—such as waste cooking oil—is unavoidable as a replacement for fossil bitumen. Through the maleinization process, waste cooking oil gains viscoelastic properties similar to those of traditional bitumen. However, using modified waste cooking oil (MWCO) in biobinders raises concerns about aging resistance and, especially, microbial growth. This study examines how microorganisms affect MWCO compared to conventional bitumen. Biodegradability tests suggest that fossil bitumen is more susceptible to bacterial growth than MWCO. No break of molecular chain is highlighted and the surface analysis using FTIR-ATR does not allow to detect any changes in chemical composition of the materials. Further analysis is needed to fully understand these findings.