A critical view on the technology readiness level (TRL) of microbial plastics biodegradation

Sales, Julio Cesar Soares; Santos, Ariane Gaspar; Castro, Aline Machado de; Coelho, Maria Alice Zarur

doi:10.1007/s11274-021-03089-0

Cited by 18 publications

(10 citation statements)

References 93 publications

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“…With the recent developments in protein engineering and industrial protein production, enzyme catalysis for tailored plastic depolymerization is an upcoming possibility that is much discussed. 7,67 Indeed, biotechnological plastic degradation inspired ideas of plastic "eating" microbes that clean the environment from plastic waste. 68 To date, under confined conditions, only competitive degradation rates were reported for ester bonds, which fits well with many of the current bioplastics (PLA, PHA, PBS, PBAT).…”

Section: Enzyme Catalysismentioning

confidence: 99%

Chemical recycling of bioplastics: technical opportunities to preserve chemical functionality as path towards a circular economy

et al. 2022

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Section: Enzyme Catalysismentioning

confidence: 99%

Chemical recycling of bioplastics: technical opportunities to preserve chemical functionality as path towards a circular economy

et al. 2022

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Section: Biological Degradationmentioning

confidence: 99%

Bio‐Polypropylene and Polypropylene‐based Biocomposites: Solutions for a Sustainable Future

Wang

Muiruri

Soo

et al. 2022

Chemistry An Asian Journal

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Polypropylene (PP) is among the most widely used commodity plastics in our everyday life due to its low cost, lightweight, easy processability, and exceptional chemical, thermo-mechanical characteristics. The growing awareness on energy and environmental crisis has driven global efforts for creating a circular economy via developing sustainable and eco-friendly alternatives to traditional plastics produced from fossil fuels for a variety of end-use applications. This review paper presents a brief outline of the emerging biobased PP derived from renewable natural resources, covering its production routes, market analysis and potential utiliza-tions. This contribution also provides a comprehensive review of the PP-based biocomposites produced with diverse green fillers generated from agro-industrial wastes, with particular emphasis on the structural modification, processing techniques, mechanical properties, and practical applications. Furthermore, given that the majority of PP products are currently destined for landfills, research progress on enhancing the degradation of PP and its biocomposites is also presented in light of the environmental concerns. Finally, a brief conclusion with discussions on challenges and future perspectives are provided.

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“…This route is based on biodegradation using microorganisms and/or microbial enzymes in order to obtain monomers or other molecules of interest with greater added values [ 8 , 9 ]. Regarding post-consumer plastics biodegradation technologies, PET is the polymer that presents the greatest maturities in relation to the proposed technologies [ 10 ].…”

Section: Introductionmentioning

confidence: 99%

Post-Consumer Poly(ethylene terephthalate) (PET) Depolymerization by Yarrowia lipolytica: A Comparison between Hydrolysis Using Cell-Free Enzymatic Extracts and Microbial Submerged Cultivation

et al. 2022

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Several microorganisms have been reported as capable of acting on poly(ethylene terephthalate) (PET) to some extent, such as Yarrowia lipolytica, which is a yeast known to produce various hydrolases of industrial interest. The present work aims to evaluate PET depolymerization by Y. lipolytica using two different strategies. In the first one, biocatalysts were produced during solid-state fermentation (SSF-YL), extracted and subsequently used for the hydrolysis of PET and bis(2-hydroxyethyl terephthalate) (BHET), a key intermediate in PET hydrolysis. Biocatalysts were able to act on BHET, yielding terephthalic acid (TPA) (131.31 µmol L−1), and on PET, leading to a TPA concentration of 42.80 µmol L−1 after 168 h. In the second strategy, PET depolymerization was evaluated during submerged cultivations of Y. lipolytica using four different culture media, and the use of YT medium ((w/v) yeast extract 1%, tryptone 2%) yielded the highest TPA concentration after 96 h (65.40 µmol L−1). A final TPA concentration of 94.3 µmol L−1 was obtained on a scale-up in benchtop bioreactors using YT medium. The conversion obtained in bioreactors was 121% higher than in systems with SSF-YL. The results of the present work suggest a relevant role of Y. lipolytica cells in the depolymerization process.

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A critical view on the technology readiness level (TRL) of microbial plastics biodegradation

Cited by 18 publications

References 93 publications

Chemical recycling of bioplastics: technical opportunities to preserve chemical functionality as path towards a circular economy

Chemical recycling of bioplastics: technical opportunities to preserve chemical functionality as path towards a circular economy

Bio‐Polypropylene and Polypropylene‐based Biocomposites: Solutions for a Sustainable Future

Post-Consumer Poly(ethylene terephthalate) (PET) Depolymerization by Yarrowia lipolytica: A Comparison between Hydrolysis Using Cell-Free Enzymatic Extracts and Microbial Submerged Cultivation

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