Fig. 4.

SEM images of PET fragments of commercial bottle PET 1. 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. In d, PET surface with cracking. d and e. PET fragment after 14 days of fermentation with M. arundinis CBMAI 2110 (PDB, 28 °C, 150 rpm). Scale bar 20 μm. Arrows indicate micropitting, Circles indicate mycelial structure adhered even after cleaning procedure