Urban parks and gardens green waste: A valuable resource for the production of fillers for biocomposites applications

• 87 wt% of urban parks and gardens green waste were converted into lignocellulosic fillers. The branches-rich fraction displayed the best reinforcing properties. Depending on targeted mechanical performance, could be sorted by dry fractionation. Urban constitute a low-cost highly available lignocellulosic-rich resource, that is currently treated in composting or anaerobic digestion processes. present work investigated for first time potential using as raw resource production fillers fractionation (combination sorting grinding processes). Five fractions with controlled composition produced: fraction, grasses-rich leaves-rich two constituted mixture constituents. All ground to reach an average median diameter around 100 ?m. effect each was compared sample whole. Biocomposites based poly(3-hydroxybutyrate-co-3-hydroxyvalerate) matrix produced melt extrusion, filler contents up 30 wt%. It shown (e.g. stress at break 37 ± 1 MPa content 15 wt%, similar neat matrix) whereas slightly degraded overall performance 33.5 1.5 wt%). formulation steps thus adapted depending application, e.g. choosing use whole remove grasses, keep only branches.