从摇篮到门的 Spirulina 生物塑料的生命周期评估,通过用糖醇塑化生产的生物塑料
Bushra Chalermthai1, Kasidit Nootong2, Bradley D Olsen3
1Bio-Circular-Green-Economy Technology & Engineering Center (BCGeTEC), Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, 10330, Thailand; Control and Systems Engineering Research Laboratory, Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, 10330, Thailand.
Environmental research
|March 5, 2024
概括
这项研究评估了螺旋藻生物塑料对环境的影响. 虽然它比传统塑料具有较低的全球变暖潜力,但其生产具有更高的能源需求和水生生态系统影响,需要更绿色的替代品.
科学领域:
- 材料科学 材料科学 材料科学
- 环境科学 环境科学
- 生物技术是生物技术.
背景情况:
- 生物塑料正在探索作为传统塑料的替代品,以减轻环境污染.
- 对所有生物塑料的环保性存在担忧.
- 微藻类,像螺旋藻,由于土地利用效率,是生物塑料的有希望的来源.
研究的目的:
- 为了进行螺旋生物塑料的摇篮到门生命周期评估 (LCA).
- 评估螺旋藻生物塑料生产对环境的影响.
- 将螺旋藻生物塑料与传统塑料 (LDPE和PVC) 进行比较.
主要方法:
- 使用openLCA程序和Agribalyse数据库进行了摇篮到门的生命周期评估 (LCA).
- 为了生产螺旋藻粉末和随后通过用甘油塑化形成生物塑料,创建了库存.
- 分析了环境影响,并与低密度聚乙烯 (LDPE) 和聚乙烯 (PVC) 薄膜进行了比较.
主要成果:
- 与LDPE (12%更高) 和PVC (22%更高) 相比,螺旋藻生物塑料生产的能量消耗更高 (3.83MJ/kg).
- 化学生长媒介 (Zarrouk媒介) 和电力被确定为对环境影响的主要贡献者.
- 螺旋藻生物塑料对水生生态系统的影响是PVC和LDPE薄膜的2-3倍.
- 螺旋藻生物塑料的全球变暖潜力较低 (1.99公斤CO2eq),而不是LDPE (23%低) 和PVC (47%低).
结论:
- 螺旋藻生物塑料具有混合的环境特征,在全球变暖潜力方面具有好处,但在能源使用和水生影响方面存在缺点.
- 优化生长媒介和能源 (例如太阳能) 对于提高螺旋藻生物塑料的环境可持续性至关重要.
- 需要进一步的研究来开发生长媒介和能源投入的更绿色替代品,以改善整体环境绩效.
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