“Compoline BioProcess” is an additive that also serves helping the processing of biodegradable polyesters (PLA), either newly manufactured or resulting from industrial waste. It is an additive developed primarily to aid the processing (filming or thermoforming) of PLA. BioProcess improves the processability of PLA, enhancing its mechanical properties (elongation at break) and is suitable for all applications that require decreasing the brittleness of PLA. “Compoline BioProcess” stabilizes the viscosity of the blend during the extrusion of newly manufactured or partially degraded PLA originating from post-industrial recycling, facilitating its processing into films, sheets or granules. When used at low percentages, it stabilizes blend viscosity, maintaining the MFI constant throughout the various processes involving PLA (granulation, filming and injection). Finally, the additive can be used in standard PLA processing systems without the need to use special precautions during extrusion.