Upcycling of hydrolyzed PET by microbial conversion to a fatty acid derivative

Welsing, Gina; Wolter, Birger; Hintzen, Henric M.T.; Tiso, Till; Blank, Lars M.

doi:10.1016/bs.mie.2020.12.025

Cited by 15 publications

(7 citation statements)

References 63 publications

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“…The possible solution to this is to upgrade or upcycle the waste plastics to produce high-value materials. [37] Out of the above-mentioned different recycling techniques, the chemical methods can provide sustainable upcycling or valorization options to improve the value of the synthesized product in order to compensate for the cost of recycling. explore more about these tertiary recycling techniques.…”

Section: Quaternary Recyclingmentioning

confidence: 99%

Strategic Approach Towards Plastic Waste Valorization: Challenges and Promising Chemical Upcycling Possibilities

et al. 2021

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Plastic waste, which is one of the major sources of pollution in the landfills and oceans, has raised global concern, primarily due to the huge production rate, high durability, and the lack of utilization of the available waste management techniques. Recycling methods are preferable to reduce the impact of plastic pollution to some extent. However, most of the recycling techniques are associated with different drawbacks, high cost and downgrading of product quality being among the notable ones. The sustainable option here is to upcycle the plastic waste to create high-value materials to compensate for the cost of production. Several upcycling techniques are constantly being investigated and explored, which is currently the only economical option to resolve the plastic waste issue. This Review provides a comprehensive insight on the promising chemical routes available for upcycling of the most widely used plastic and mixed plastic wastes. The challenges inherent to these processes, the recent advances, and the significant role of the science and research community in resolving these issues are further emphasized.

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Section: Quaternary Recyclingmentioning

confidence: 99%

Strategic Approach Towards Plastic Waste Valorization: Challenges and Promising Chemical Upcycling Possibilities

et al. 2021

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“…Welsing et al described genetic engineering tools for the metabolization of PET monomers and the synthesis of fatty acid derivatives hydroxyalkanoyloxy alkanoates, which can then be used in the catalytical conversion to drop-in biofuels as well as in the polymerization to bio-based poly(amide urethane) due to their surface-active properties. 99 Upcycling of other condensation polymers PET is by far the most researched condensation polymer for biological upcycling. Scarce studies are done with other polymer from the same family.…”

Section: Chemical Recyclingmentioning

confidence: 99%

“…Welsing et al . described genetic engineering tools for the metabolization of PET monomers and the synthesis of fatty acid derivatives hydroxyalkanoyloxy alkanoates, which can then be used in the catalytical conversion to drop‐in biofuels as well as in the polymerization to bio‐based poly(amide urethane) due to their surface‐active properties 99 …”

Section: Plastic Wastesmentioning

confidence: 99%

From waste to wealth: upcycling of plastic and lignocellulosic wastes to PHAs

Abu-Thabit

Pérez-Rivero

Uwaezuoke

et al. 2021

J of Chemical Tech & Biotech

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Over the past fifty years, environmental pollution from non‐biodegradable petroleum‐based plastics has worsened and become a real threat to marine life and human health. Thus, solutions to plastic pollution are urgently needed for reducing the contamination of soil and water resources. Developing alternative biodegradable plastics derived from renewable resources is an emerging research focus that can alleviate the accumulation of plastic waste in the environment. Polyhydroxyalkanoates (PHAs) are promising biodegradable biopolymers for replacing plastics derived from fossil fuel resources. The large scale commercialization of PHAs is not yet feasible due to their high production cost, which is largely associated with the feedstock cost. Using readily available carbon sources from underutilized lignocellulosic biomass and non‐recyclable plastic wastes allows for feedstock cost reduction and for the production of value‐added PHA bioplastics, and this significantly contributes to the solution of plastic pollution in a circular economy approach. This review highlights the recent efforts for valorizing plastic and lignocellulosic wastes to produce PHAs through a biotechnological approach using a two‐step methodology. In the first step, plastic (PE, PP, PS, PET) and lignocellulosic (cellulose, hemicellulose, lignin) macromolecules are depolymerized and converted to smaller fragments/monomers, which will be utilized for the subsequent bio‐upcycling step via fermentation process to produce PHAs. Pyrolyzed plastic wastes and hydrolysates from lignocellulosic waste biomass will facilitate the transition from linear to circular economy, lower the production cost of PHAs, and contribute to the solution of plastic pollution in a practical, economical, and sustainable approach. © 2021 Society of Chemical Industry (SCI).

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“…[3] PET has the advantage of being upcycled because the PET hydrolysates, TPA and EG, can be converted to high‐value‐added chemicals. Recently, PET upcycling strategies have been developed to produce value‐added chemicals, such as medium‐chain‐length polyhydroxyalkanoate (PHA), hydroxyalkanoyloxy alkanoates, catechol, gallic acid, vanillic acid, muconic acid, 2‐pyrone‐4,6‐dicarboxylic acid,[ 4a , 4b , 4c , 4d , 4e , 4f , 4g ] from the depolymerized monomers (i. e., TPA and EG). Reclaimed PET bottles are upcycled to higher‐value, long‐lifetime materials, fiber‐reinforced plastics via combination with bio‐based monomers.…”

Section: Introductionmentioning

confidence: 99%

Chemo‐Biological Upcycling of Poly(ethylene terephthalate) to Multifunctional Coating Materials

et al. 2021

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Chemo-biological upcycling of poly(ethylene terephthalate) (PET) developed in this study includes the following key steps: chemo-enzymatic PET depolymerization, biotransformation of terephthalic acid (TPA) into catechol, and its application as a coating agent. Monomeric units were first produced through PET glycolysis into bis(2-hydroxyethyl) terephthalate (BHET), mono(2-hydroxyethyl) terephthalate (MHET), and PET oligomers, and enzymatic hydrolysis of these glycolyzed products using Bacillus subtilis esterase (Bs2Est). Bs2Est efficiently hydro-lyzed glycolyzed products into TPA as a key enzyme for chemoenzymatic depolymerization. Furthermore, catechol solution produced from TPA via a whole-cell biotransformation (Escherichia coli) could be directly used for functional coating on various substrates after simple cell removal from the culture medium without further purification and water-evaporation. This work demonstrates a proof-of-concept of a PET upcycling strategy via a combination of chemo-biological conversion of PET waste into multifunctional coating materials.

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Upcycling of hydrolyzed PET by microbial conversion to a fatty acid derivative

Cited by 15 publications

References 63 publications

Strategic Approach Towards Plastic Waste Valorization: Challenges and Promising Chemical Upcycling Possibilities

Strategic Approach Towards Plastic Waste Valorization: Challenges and Promising Chemical Upcycling Possibilities

From waste to wealth: upcycling of plastic and lignocellulosic wastes to PHAs

Chemo‐Biological Upcycling of Poly(ethylene terephthalate) to Multifunctional Coating Materials

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