在现场去除产品,以通过膜反应器酶去聚合聚乙烯二甲酸
Christian Ayafor1, Allen C Chang2, Akanksha Patel2
1Energy Engineering Program, University of Massachusetts Lowell, Lowell, MA-01854, USA.
ChemSusChem
|September 3, 2024
概括
使用膜反应器进行现场产品去除 (ISPR) 显著提高了聚乙烯二甲 (PET) 脱聚合的两倍以上. 这种方法提高了铁酸的产量,并为可持续的塑料回收提供了pH控制的潜在节约.
科学领域:
- 生物技术是生物技术.
- 环境科学 环境科学
- 聚合物化学 聚合物化学
背景情况:
- 聚乙烯二甲 (PET) 是一种普遍存在的一次性塑料,对全球塑料垃圾有很大贡献.
- 酶去聚合为PET上循环提供了一个有前途的途径,但在酸性条件下酶的稳定性是一个主要的限制.
- 开发高效的PET回收方法对于环境保护和可持续资源管理至关重要.
研究的目的:
- 调查现场产品去除 (ISPR) 在增强酶性PET脱聚合过程中的有效性.
- 在膜反应器系统中评估ICCG变体的叶子分枝堆肥化酶的性能.
- 评估ISPR对单体和质子去除的影响,以改善PET降解.
主要方法:
- 使用膜反应器在PET酶去聚合过程中实现原位产品去除 (ISPR) 的质子和单体.
- 在脱聚合过程中使用ICCG变种的叶子分枝堆肥丁酶.
- 与不同初始PET负载 (10 mg/ml和1 mg/ml) 的脱聚合效率和铁酸产量进行比较.
主要成果:
- 在更高的PET负载 (10 mg/ml) 上,通过ISPR实现了两倍以上的整体PET脱聚合和铁酸产量的改善.
- 观察到ISPR在较低PET负载 (1 mg/ml) 时的益处减少,因为对酶溶液 pH 稳定需求较少.
- 通过ISPR在适度稀释比率下对生物反应器中的pH控制的腐蚀基溶液进行估计的潜在节约.
结论:
- 膜反应器中的ISPR是一种高度有效的策略,用于增强酶性PET脱聚合,特别是在更高的基质度下.
- 这些发现为优化ISPR系统的优化提供了有价值的见解,用于工业规模的酶性塑料回收.
- 这种方法有助于开发更可持续的塑料废物管理解决方案,并促进循环经济.
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