Fig. 5.

SEM images of PET fragments of commercial bottle PET 2 after fermentation. a. Intact PET fragment after 14 days in PDB (abiotic control). b and c. PET fragment after 14 days of fermentation with M. arundinis CBMAI 2109. d and e. PET fragment after 14 days of fermentation with M. arundinis CBMAI 2110. e. Shows a zoomed image indicating strong adherence of fungal mycelia after cleaning and PET surface with cracking (PDB, 28 °C, 150 rpm). Scale bar 20 μm. Arrows indicate pittings, circle highlights microcracking