Thermoplastic Blends Based on Poly(Butylene Succinate-co-Adipate) and Different Collagen Hydrolysates from Tanning Industry—II: Aerobic Biodegradation in Composting Medium

Abstract Two different raw hydrolyzed collagens (HCs), by-products of the Tannery industry, were investigated in blends with a bioplastic, as poly(butylene succinate-co-adipate) (PBSA), for production thermoplastic items possible applications agriculture. Chemical characterization selected PBSA/HC and phytotoxicity assays on garden cress seeds ( Lepidium sativum L.), used spy species, carried out; addition, biodegradation disintegration specimens assessed under controlled composting conditions at temperature (58 25 °C). Although one HC released sodium chloride aqueous extract, all blends, up to 20 wt.% HC, resulted no-phytotoxic showed considerable amounts macro- micro- nutrients plants (mainly nitrogen). Regardless amount added, HCs enhanced rate compost 58 °C compared pure PBSA; lowering °C, expected, slightly lowered using same compost. Most tests, performed dog bone samples, corroborated results thus suggesting that plastic mixtures could reasonably end their life cycle facility without decreasing quality safety resulting The outcomes achieved encourage use collagen hydrolysates from tanning industry PBSA-based produce compostable (mulching films and/or plant pots) more sustainable uses agriculture nurseries. In these low-cost can lower cost final product give it fertilizing properties given presence organic nitrogen hydrolysates.