Winogradsky Institute of Microbiology, Federal Research Center of Biotechnology, Russian Academy of Sciences, Moscow 119071, Russia.
Department of Chemistry, M.V. Lomonosov Moscow State University, Moscow 119991, Russia.
Bioresour Technol. 2024 Oct;410:131288. doi: 10.1016/j.biortech.2024.131288. Epub 2024 Aug 15.
The increasing use of synthetic biodegradable polymers, such as aliphatic polyesters, has led to a greater need to understand their behavior in an end-of-life scenario as food packaging materials. The aim of this work was to investigate the effect on composting of high to 10 wt% concentration of commercial polylactide packaging in food waste during a 98-day pilot-scale test. Members of the genera Bacillus, Geobacillus, Caldibacillus, Compostibacillus, Novibacillus, Planifilum and Aeribacillus accounted for 77 % of the bacterial community at the initial stage. Significant fragmentation of the polylactide packaging was observed after 14 days, and the appearance of low-molecular weight (approximately 5.4 kDa) hydrolytic degradation products led to an increase in biodiversity and a prolongation of the thermophilic stage by 12 days. The results obtained show the possibility of efficient disposal of food waste with high concentration of polylactide packaging under industrial composting conditions.
随着合成可生物降解聚合物（如脂肪族聚酯）的应用越来越多，人们越来越需要了解它们作为食品包装材料在使用寿命结束时的行为。本工作旨在研究在 98 天的中试规模试验中，将高达 10wt%的商业聚乳酸包装作为食品废物进行堆肥时对堆肥的影响。在初始阶段，芽孢杆菌属、地芽孢杆菌属、解糖热芽孢杆菌属、堆肥芽孢杆菌属、新芽孢杆菌属、拟盘多毛孢属和需氧芽孢杆菌属的成员占细菌群落的 77%。在 14 天后观察到聚乳酸包装的明显碎片化，并且出现了低分子量（约 5.4kDa）的水解降解产物，导致生物多样性增加，并使嗜热期延长了 12 天。结果表明，在工业堆肥条件下，高浓度聚乳酸包装的食品废物可以有效处理。
