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

两种不同的原料水解胶原蛋白 (HC) 是制革业的副产品，与生物塑料（如聚（丁二酸丁二酸共己二酸丁二醇酯）（PBSA））混合进行了研究，用于生产可能在农业中应用的热塑性塑料制品. 选定的 PBSA/HC 混合物的化学表征和对水芹种子（Lepidium sativum）的植物毒性测定L.)，用作间谍物种，进行了；此外，在不同温度（58 和 25 °C）的受控堆肥条件下，对样品的生物降解和分解进行了评估。尽管研究的 HC 之一在水性提取物中释放氯化钠，但所有 PBSA/HC 混合物，高达 20 重量％的 HC，都没有植物毒性，并显示出大量的植物常量和微量营养素（主要是氮）。不管添加的量是多少，与纯 PBSA 相比，HCs 提高了 PBSA/HC 混合物在 58°C 堆肥中的生物降解率；正如预期的那样，将温度降低到 25 °C，使用相同堆肥的生物降解率略有降低。对狗骨样本进行的大多数分解试验证实了生物降解试验的结果，因此表明塑料混合物可以在堆肥设施中合理地结束其生命周期，而不会降低所得堆肥的质量和安全性。取得的成果鼓励在生产基于 PBSA 的热塑性混合物中使用来自制革行业的原始胶原蛋白水解物来生产可堆肥物品（地膜和/或植物盆），以便在农业和/或植物苗圃中实现更可持续的用途。此外，鉴于水解产物中存在有机氮，这些低成本副产品的使用可以降低最终产品的成本并赋予其对植物施肥的特性。取得的成果鼓励在生产基于 PBSA 的热塑性混合物中使用来自制革行业的原始胶原蛋白水解物来生产可堆肥物品（地膜和/或植物盆），以便在农业和/或植物苗圃中实现更可持续的用途。此外，鉴于水解产物中存在有机氮，这些低成本副产品的使用可以降低最终产品的成本并赋予其对植物施肥的特性。取得的成果鼓励在生产基于 PBSA 的热塑性混合物中使用来自制革行业的原始胶原蛋白水解物来生产可堆肥物品（地膜和/或植物盆），以便在农业和/或植物苗圃中实现更可持续的用途。此外，鉴于水解产物中存在有机氮，这些低成本副产品的使用可以降低最终产品的成本并赋予其对植物施肥的特性。