从农业食品残留物中产生多基酸盐的混合培养产品,含有可变的基酸盐含量
Claudia Magonara1, Elvis Montagnese1, Davide Bertasini1
1Department of Biotechnology, University of Verona, Verona, 37134, Italy.
Environmental science and pollution research international
|April 16, 2025
概括
这项研究将农业食品残留物价值化为多基酸 (PHAs),特别是多基酸-共基酸 (PHBV). 这项研究成功地生产了PHBV,具有基酸含量,用于农业应用,使用混合微生物培养物和各种原料.
科学领域:
- 生物技术和可持续材料科学.
- 微生物生物聚合物生产.
背景情况:
- 农业食品残留物是丰富的,未充分利用的生物质资源.
- 聚酸酸 (PHAs) 为传统塑料提供一种可生物降解的替代品.
- 与纯聚基酸 (PHB) 相比,聚基酸-联合酸 (PHBV) 提供了更大的灵活性.
研究的目的:
- 为了生产具有特定基酸 (HV) 单体含量 (25-35% w/w) 的多基酸 (PHAs).
- 评估在PHBV生产中使用多种原料,包括农业食品残留发酵液的可行性.
- 为农业材料应用量身定制PHBV特性.
主要方法:
- 在盛宴/饥荒制度下利用混合微生物培养来进行PHA积累.
- 使用各种原料,从合成介质到农业食品残留发酵液.
- 分析了化学氧气需求 (COD) 移除,氧酸盐含量,分子量和细菌群体组成.
主要成果:
- 在生产的PHBV中达到氧单体含量的目标 (25-35%w/w).
- 合成料的高COD去除效率 (81.6-99.1%) 和农业发酵剂的中等效率 (71.4-85.9%).
- 获得了适合热塑性加工的分子量 (352-1369 kDa),尽管原料的变化.
- 观察到细菌群体组成的变化,有利于PHA生产者,如Thauera和Paracoccus,在引入农业发酵剂后,多样性下降.
结论:
- 农业食品残留物可以有效地被提升为功能性多基酸 (PHBV).
- 混合微生物培养能够生产PHBV,使用各种原料量身定制的氧酸盐含量.
- 需要进一步优化,以提高农业原料的碳吸收,并保持微生物多样性,以实现一致的生物聚合物生产.
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