Mixed plastics waste valorization through tandem chemical oxidation and biological funneling

Author:

Sullivan Kevin P.12ORCID,Werner Allison Z.12ORCID,Ramirez Kelsey J.12ORCID,Ellis Lucas D.12ORCID,Bussard Jeremy R.12ORCID,Black Brenna A.12ORCID,Brandner David G.12ORCID,Bratti Felicia12ORCID,Buss Bonnie L.12ORCID,Dong Xueming12ORCID,Haugen Stefan J.12ORCID,Ingraham Morgan A.12ORCID,Konev Mikhail O.12,Michener William E.12ORCID,Miscall Joel12ORCID,Pardo Isabel12ORCID,Woodworth Sean P.12ORCID,Guss Adam M.23ORCID,Román-Leshkov Yuriy4ORCID,Stahl Shannon S.5ORCID,Beckham Gregg T.12ORCID

Affiliation:

1. Renewable Resources and Enabling Sciences Center, National Renewable Energy Laboratory, Golden, CO, USA.

2. BOTTLE Consortium, Golden, CO, USA.

3. Biosciences Division, Oak Ridge National Laboratory, Oak Ridge, TN, USA.

4. Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA.

5. Department of Chemistry, University of Wisconsin Madison, Madison, WI, USA.

Abstract

Mixed plastics waste represents an abundant and largely untapped feedstock for the production of valuable products. The chemical diversity and complexity of these materials, however, present major barriers to realizing this opportunity. In this work, we show that metal-catalyzed autoxidation depolymerizes comingled polymers into a mixture of oxygenated small molecules that are advantaged substrates for biological conversion. We engineer a robust soil bacterium, Pseudomonas putida , to funnel these oxygenated compounds into a single exemplary chemical product, either β-ketoadipate or polyhydroxyalkanoates. This hybrid process establishes a strategy for the selective conversion of mixed plastics waste into useful chemical products.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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