用于食品配送的纸箱在堆肥和无氧消化试验中的降解
Giovanni Dolci1, Martina Intilisano1, Floriana Fava1
1Politecnico di Milano, Department of Civil and Environmental Engineering - Piazza Leonardo Da Vinci 32, 20133 Milano, Italy.
Bioresource technology
|August 5, 2024
概括
由纸制成的食品配送盒适用于堆肥和无氧消化. 然而,盒子上的聚乳酸 (PLA) 或屏障涂层可能会阻碍生物处理过程.
科学领域:
- 环境科学 环境科学
- 废物管理 废物管理
- 生物技术是生物技术.
背景情况:
- 食品配送服务产生大量的包装废物.
- 这些包装材料的环境命运,特别是它们的生物降解性,是一个关键问题.
- 了解不同材料对生物处理过程的影响对于可持续的废物管理至关重要.
研究的目的:
- 在堆肥和无氧消化条件下评估纸质食品配送盒的生物降解性.
- 评估聚乳酸 (PLA) 和屏障涂料对这些盒子生物处理的影响.
- 为了比较不同盒组合的降解率与标准有机废物的降解率.
主要方法:
- 在实验室模拟的全尺度条件下,对四种类型的纸箱 (仅纸,带有PLA的纸,带有屏障涂层的纸) 进行堆肥.
- 无氧降解性测试,包括生物化学甲潜力 (BMP) 和半连续测试,仅在纸上和带有PLA盒的纸上.
- 在堆肥过程中对盒子分解的视觉评估以及在厌氧试验中对未消化的材料的分析.
主要成果:
- 只有纸张的盒子在四周内就无法在堆肥中识别.
- 带有PLA盒的纸张需要八周才能变得无法识别,而带有屏障涂层的纸张需要十二周.
- 纯纸箱在BMP测试中达到92%的可降解性,相当于食品浪费.
- 在BMP测试中,带有PLA盒的纸张的降解率较低 (76%),在半连续测试中发现未消化的PLA.
结论:
- 纸质食品配送包装适用于生物废物处理过程,如堆肥和无氧消化.
- 加入聚乳酸 (PLA) 或其他屏障涂层可以显著阻碍这些材料的降解效率.
- 材料选择对于确保食品配送包装废物的有效生物处理至关重要.
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