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3. Fungal Screening for Potential PET Depolymerization

Author

Malafatti-Picca, Lusiane, primary, Bucioli, Elaine Cristina, additional, de Barros Chaves, Michel Ricardo, additional, de Castro, Aline Machado, additional, Valoni, Érika, additional, de Oliveira, Valéria Maia, additional, Marsaioli, Anita Jocelyne, additional, Govone, José Silvio, additional, de Franceschi de Angelis, Dejanira, additional, Brienzo, Michel, additional, and Attili-Angelis, Derlene, additional

Published
2023
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4. Microbiological aspects of biodiesel and biodiesel/diesel blends biodeterioration

Author

Soriano, Adriana Ururahy, Martins, Luiz Fernando, Santos de Assumpção Ventura, Eliane, Teixeira Gerken de Landa, Frederico Henrique, de Araújo Valoni, Érika, Dutra Faria, Fátima Regina, Ferreira, Rafael Fragoso, Kremer Faller, Maria Clara, Valério, Renato Rocha, Catharine de Assis Leite, Deborah, Lima do Carmo, Flávia, and Peixoto, Raquel Silva

Published
2015
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9. Screening of commercial enzymes for poly(ethylene terephthalate) (PET) hydrolysis and synergy studies on different substrate sources.

Author

Castro, Aline, Carniel, Adriano, Nicomedes Junior, José, Gomes, Absai, and Valoni, Érika

Subjects
POLYETHYLENE terephthalate, PLASTIC recycling, DEPOLYMERIZATION, MONOMERS, HYDROLYSIS
Abstract

Poly(ethylene terephthalate) (PET) is one of the most consumed plastics in the world. The development of efficient technologies for its depolymerization for monomers reuse is highly encouraged, since current recycling rates are still very low. In this study, 16 commercial lipases and cutinases were evaluated for their abilities to catalyze the hydrolysis of two PET samples. Humicola insolens cutinase showed the best performance and was then used in reactions on other PET sources, solely or in combination with the efficient mono(hydroxyethyl terephthalate)-converting lipase from Candida antarctica. Synergy degrees of the final titers of up to 2.2 (i.e., more than double of the concentration when both enzymes were used, as compared to their use alone) were found, with increased terephthalic acid formation rates, reaching a maximum of 59,989 µmol/L (9.36 g/L). These findings open up new possibilities for the conversion of post-consumer PET packages into their minimal monomers, which can be used as drop in at existing industrial facilities. [ABSTRACT FROM AUTHOR]

Published
2017
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