Use of rhizosphere microorganisms in the biodegradation of PLA and PET polymers in compost soil

Comparative Study of Structural Changes of Polylactide and Poly(ethylene terephthalate) in the Presence of Trichoderma viride

“…Research by Carniel et al [ 56 ] showed that lipases and cutinases produced by Candida antarctica and Humicola insolens , respectively, caused structural changes of PET plastic. Moreover, Janczak et al [ 20 ] showed that the fungi Laccaria laccatta and Clitocybe sp., which show cellulolytic activity, and also pectinolytic activity in case of Clitocybe sp., accelerated degradational changes of PLA and PET. PLA can be hydrolyzed by lipase from Rhizopus delemar and proteinase K from Tritirachium album , and also by polyester polyurethane depolymerase from Comamonas acidovorans [ 57 , 58 ].…”

“…The enzymatic activity of the microorganisms was determined based on their ability to synthesize hydrolytic enzymes, e.g., amylase, cellulase, lipase, and pectinase. Analysis of the hydrolytic activity of the fungus was performed according to Hrynkiewicz et al [ 98 ] and Janczak et al [ 20 ]. The enzymatic activity was expressed by W act = S h 2 /(S c × t), where S h —hydrolysis zone diameter; S c —colony diameter; and t—incubation time (168 h).…”

“…It is usually a more cost-effective and more efficient process that does not produce the secondary pollution associated with traditional methods [ 15 , 16 ]. The main role in biodegradation is played by microorganisms, including fungi, that can biodegrade a range of plastic types, e.g., fungi of the genera Aspergillus , Fusarium , Chaetomium , Peacilomyces , Mucor , Cryptococcus , Rhizopus , Penicillium [ 17 , 18 ], Pseudozyma japonica [ 19 ], Clitocybe sp., and Laccaria laccata [ 20 ]. Fungi of the genera Aspergillus , Trichoderma , Fusarium, and Alternaria have the ability to degrade polyurethane in soil [ 21 ], whereas the fungi Aspergillus ustus , Aspergillus sydowii , and Aspergillus fumigatus are involved in the biodegradation of PLA [ 5 ].…”

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“…The determination of the internal temperature was obtained at the beginning, after three days and at the end after 7 days by means of a thermometer, for dissolved oxygen in the same time interval it will be determined by an oximeter in the unit's mg/L and finally for the determination of the pH in the same time interval it was obtained by means of a potentiometer (Janczak et al, 2019…”

Data supporting the morphological/topographical properties and the degradability on PET/PLA and PET/chitosan blends

“…One of the options to reduce the pollution problem derived of the long-lasting petroleum polymers use, such as poly(ethylenterephthalate) (PET), is to combine the mechanical, barrier and thermal properties of petroleum-based polymers with the biodegradability properties of renewable polymers: poly(lactic acid) (PLA) and chitosan [2] , [3] .…”