Journal ArticleDOI
Up-Cycling of PET (Polyethylene Terephthalate) to the Biodegradable Plastic PHA (Polyhydroxyalkanoate)
Shane T. Kenny,Jasmina Nikodinovic Runic,Walter Kaminsky,Trevor Woods,Ramesh Babu,Chris M. Keely,Werner J. Blau,Kevin E. O’Connor +7 more
TLDR
The conversion of the petrochemical polymer polyethylene terephthalate to a biodegradable plastic polyhydroxyal-kanoate (PHA) is described here and PHA was detected in all three strains when nitrogen depleted below detectable levels in the growth medium.Abstract:
The conversion of the petrochemical polymer polyethylene terephthalate (PET) to a biodegradable plastic polyhydroxyalkanoate (PHA) is described here. PET was pyrolised at 450 °C resulting in the production of a solid, liquid, and gaseous fraction. The liquid and gaseous fractions were burnt for energy recovery, whereas the solid fraction terephthalic acid (TA) was used as the feedstock for bacterial production of PHA. Strains previously reported to grow on TA were unable to accumulate PHA. We therefore isolated bacteria from soil exposed to PET granules at a PET bottle processing plant. From the 32 strains isolated, three strains capable of accumulation of medium chain length PHA (mclPHA) from TA as a sole source of carbon and energy were selected for further study. These isolates were identified using 16S rDNA techniques as P. putida (GO16), P. putida (GO19), and P. frederiksbergensis (GO23). P. putida GO16 and GO19 accumulate PHA composed predominantly of a 3-hydroxydecanoic acid monomer while P. freder...read more
Citations
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Patent
Catalyst for the conversion of plastics to olefin and aromatic products
TL;DR: In this paper, a fluidized catalytic cracking (FCC) and a ZSM-5 zeolite catalyst is used for producing olefins and aromatic compounds from a feedstock.
Journal ArticleDOI
Microbial degradation and valorization of poly(ethylene terephthalate) (PET) monomers
TL;DR: This review focuses on the microbes and metabolic pathways for the degradation of PET monomers, and recent advances in the biotransformation of TPA and EG into value-added compounds are discussed in detail.
Journal ArticleDOI
Synthesis, properties, and applications of polylactic acid‐based polymers
Journal ArticleDOI
Chemical Upcycling of Poly(3-hydroxybutyrate) into Bicyclic Ether–Ester Monomers toward Value-Added, Degradable, and Recyclable Poly(ether ester)
Journal ArticleDOI
Robust process for high yield conversion of non-degradable polyethylene to a biodegradable plastic using a chemo-biotechnological approach.
Maciej Guzik,Tomasz Nitkiewicz,Magdalena Wojnarowska,Mariusz Sołtysik,Shane T. Kenny,Ramesh Babu,Marshall Best,Kevin E. O’Connor +7 more
TL;DR: In this article, the optimisation of a process for producing medium-chain-length polyhydroxyalkanoate (mcl-PHA) by Pseudomonas putida KT2440 when fed with a polyethene (PE)-derived fatty acid mixture was investigated.
References
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Journal ArticleDOI
Gapped BLAST and PSI-BLAST: a new generation of protein database search programs.
Stephen F. Altschul,Thomas L. Madden,Alejandro A. Schäffer,Jinghui Zhang,Zheng Zhang,Webb Miller,David J. Lipman +6 more
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Occurrence, metabolism, metabolic role, and industrial uses of bacterial polyhydroxyalkanoates.
A J Anderson,E A Dawes +1 more
TL;DR: The physiological functions of PHB as a reserve material and in symbiotic nitrogen fixation and its presence in bacterial plasma membranes and putative role in transformability and calcium signaling are also considered.
Journal ArticleDOI
A rapid gas chromatographic method for the determination of poly- β -hydroxybutyric acid in microbial biomass
TL;DR: The gas chromatographic method for the determination of poly-β-hydroxybutyric acid (PHB) is characterized by high accuracy and excellent reproducibility, permitting determinations as low as 10−5 g/l.
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