High-fold improvement of assorted post-consumer poly(ethylene terephthalate) (PET) packages hydrolysis using Humicola insolens cutinase as a single biocatalyst

Castro, Aline Machado de; Carniel, Adriano; Stähelin, Diego; Chinelatto, Luiz S.; Honorato, Hercílio de Angeli; Menezes, Sônia Maria Cabral de

doi:10.1016/j.procbio.2019.03.006

Cited by 53 publications

(41 citation statements)

References 30 publications

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“…A local plastic industrial recycling plant provided assorted (i.e., mixed colours, thicknesses) post-consumer PET flakes, which were later ground in a knife mill. This same PET sample was characterized previously by Castro et al, 22 which reported a molar mass value of 43 379 g mol −1 and a crystallinity degree of 41%. Ethylene glycol was purchased from HACH, Loveland, Co, USA, urea (99% purity) and zinc chloride (98% purity) were obtained from Sigma Aldrich Brasil Ltda, zinc acetate dihydrate (98% purity) and nickel dichloride hexahydrate (97%) were purchased from Vetec Quimica Fina Ltda, RJ, Brazil, and sodium acetate trihydrate (99% purity) was obtained from Dinâmica Química Contemporânea Ltda, SP, Brazil.…”

Section: Experimental Materialsmentioning

confidence: 85%

Chemo‐enzymatic depolymerization of industrial and assorted post‐consumer poly(ethylene terephthalate) (PET) wastes using a eutectic‐based catalyst

Ricarte

Dias

Sirelli

et al. 2021

J of Chemical Tech & Biotech

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BACKGROUND: Every minute, 1 million bottled drinks were purchased worldwide in 2017. Poly(ethylene terephthalate) (PET) bottles are highly recalcitrant wastes, taking at least 450 years to decompose naturally, and their accumulation in the environment triggers a series of environmental impacts. Recycling is an environmentally friendly alternative to PET waste management. A two-step PET depolymerization approach was studied in this work, comprising chemical glycolysis followed by enzymatic hydrolysis.RESULTS: In the glycolysis reaction, 100% PET was depolymerized in the presence of a eutectic solvent-based catalyst and ethylene glycol, releasing bis(2-hydroxyethyl) terephthalate (BHET) as the main product (70% yield). The recovered BHET was then hydrolysed by the highly efficient Candida antarctica lipase B, releasing terephthalic acid (TPA), achieving 0.98 of mole fraction in the best result of the experimental design. The overall yield of chemo-enzymatic depolymerization of PET into TPA was 57%. CONCLUSION: Using this integrated approach, a high overall yield of TPA from PET could be achieved within a short process timeframe (24 h).

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Section: Experimental Materialsmentioning

confidence: 85%

Chemo‐enzymatic depolymerization of industrial and assorted post‐consumer poly(ethylene terephthalate) (PET) wastes using a eutectic‐based catalyst

Ricarte

Dias

Sirelli

et al. 2021

J of Chemical Tech & Biotech

Self Cite

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“… [ 41 ] X PET depolymerization using enzymes. [ 42 ] X PET recycling with enzymes as catalyst. [ 47 ] X Bio-derived polymer from citrus waste.…”

Section: Resultsmentioning

confidence: 99%

“…The literature proposed a variety of chemical recycling and DRAM options at the material level. The chemical recycling options include multi-step pyrolysis [ 222 ], using enzymes as catalyst for disseminating PET [ 41 ], and PET depolymerization using enzymes via glycolysis reactions [ 42 ]. Other topics include chemical recycling by means of hydrothermal processing of waste plastic fractions [ 168 ], reimagining green chemistry in relation to its circular material [ 128 ], the opportunities for and challenges of plastic waste pyrolysis [ 181 ].…”

Section: Resultsmentioning

confidence: 99%

Bibliographic mapping of post-consumer plastic waste based on hierarchical circular principles across the system perspective

Sitadewi

Yudoko

Okdinawati

2021

Heliyon

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The current dominating production and consumption model is based on the linear economy (LE) model, within which raw materials are extracted-processed-consumed-discarded. A circular economy (CE) constitutes a regenerative systemic approach to economic development which views waste as a valuable resource to be reprocessed back into the economy. In order to understand the circular strategy for a systemic change from an LE to a CE as a means of resolving the issue of plastic waste, this research aims to map current circular strategy trends across the system perspective contained in the literature relating to plastic CE literature. The novelty of the research lies in the mapping and review of the distribution of comprehensive circular strategies within the 9R framework across the entire system perspective (e.g. micro-meso-macro) down to its sub-levels in the literature on a plastic CE. The bibliographic mapping and systematic literature review iindicateed that the majority of the research focused on recycle (R8), followed by refuse (R0), reuse (R3), and reduce (R2). Certain circular strategies are more appropriate to handling certain plastic materials, despite CE's favoring of prevention and recycling over incineration. Recover (R9) is often used to process mixed and contaminated plastic. Recycling (R8) is the most popular circular strategy and the most applicable to plastic material with three recycle trends, namely; mechanical recycling, chemical recycling and DRAM (Distributed-Recycling-and-Additive-Manufacturing). Prolonging the product life through refurbishing (R5) is not applicable to plastic due to its material limitations. Reduce (R2) popularity as circular strategy reflects the preference to reduce consumption, either by launching campaigns to prevent waste or increasing production efficiency. Research on Rethink (R1) has largely focused on rethinking product design, consumer and organization behavior and perceptions of CE. Refuse (R0) strategy is an adoption of bio-based plastics which have a similar function to fossil-based plastics.

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“…According to WWF [ 8 ], phasing out single-use plastics has the potential to reduce plastic demand by up to 40% by the year 2030. Thus, the current scenario requires a more sustainable route for the recycling of this waste, which if not realized will increase the environmental imbalance due to its non-biodegradability in nature [ 8 , 9 ].…”

Section: Introductionmentioning

confidence: 99%

Technological Characterization of PET—Polyethylene Terephthalate—Added Soil-Cement Bricks

Silva

Cecchin

Azevedo³

et al. 2021

Materials

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The ever-growing consumption and improper disposal of non-biodegradable plastic wastes is bringing worrisome perspectives on the lack of suitable environmentally correct solutions. Consequently, an increasing interest in the circular economy and sustainable techniques is being raised regarding the management of these wastes. The present work proposes an eco-friendly solution for the huge amount of discarded polyethylene terephthalate (PET) wastes by addition into soil-cement bricks. Room temperature molded 300 × 150 × 70 mm bricks were fabricated with mixtures of clay soil and ordinary Portland cement added with up to 30 wt.% of PET waste particles. Granulometric analysis of soil indicated it as sandy and adequate for brick fabrication. As for the PET particles, they can be considered non-plastic and sandy. The Atterberg consistency limits indicated that addition of 20 wt.% PET waste gives the highest plasticity limit of 17.3%; moreover, with PET waste addition there was an increase in the optimum moisture content for the compaction and decrease in specific weight. Standard tests showed an increase in compressive strength from 0.83 MPa for the plain soil-cement to 1.80 MPa for the 20 wt.% PET-added bricks. As for water absorption, all bricks displayed values between 15% and 16% that attended the standards and might be considered an alternative for non-structural applications, such as wall closures in building construction.

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High-fold improvement of assorted post-consumer poly(ethylene terephthalate) (PET) packages hydrolysis using Humicola insolens cutinase as a single biocatalyst

Cited by 53 publications

References 30 publications

Chemo‐enzymatic depolymerization of industrial and assorted post‐consumer poly(ethylene terephthalate) (PET) wastes using a eutectic‐based catalyst

Chemo‐enzymatic depolymerization of industrial and assorted post‐consumer poly(ethylene terephthalate) (PET) wastes using a eutectic‐based catalyst

Bibliographic mapping of post-consumer plastic waste based on hierarchical circular principles across the system perspective

Technological Characterization of PET—Polyethylene Terephthalate—Added Soil-Cement Bricks

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