单个CSTR可以像SBR一样有效地从市政废水衍生的原料中选择PHA储存生物质
Antoine Brison1,2, Pierre Rossi3, Nicolas Derlon1
1Eawag, Swiss Federal Institute of Aquatic Science and Technology, 8600 Dübendorf, Switzerland.
Water research X
|May 30, 2023
概括
一个连续流动的水箱反应堆 (CSTR) 有效地选择产生生物质的聚酸酸盐 (PHA),匹配测序批量反应堆 (SBR) 的性能. 这种方法提高了效率,并扩大了从废物生产生物塑料的原料选择.
科学领域:
- 生物技术和生物化学工程 生物技术和生物化学工程
- 环境微生物学环境微生物学
- 聚合物科学 聚合物科学
背景情况:
- 聚酸酸 (PHAs) 是由废物流产生的生物塑料.
- 选择高PHA储存生物质对于高效的PHA生产至关重要.
- 目前的选择方法经常使用测序批量反应器 (SBR),限制了可扩展性.
研究的目的:
- 评估连续流动的水箱反应堆 (CSTR) 作为SBRs的替代方案,用于PHA储存生物质的选择.
- 评估使用市政废水衍生原料的CSTR性能.
- 在不同的营养条件下分析微生物群落动态和PHA储存能力.
主要方法:
- 运行并行CSTR和SBR系统使用过的初级污泥发酵剂.
- 监控PHA储存能力超过150天和积累阶段.
- 进行了详细的微生物社区分析和营养素 (N,P) 分析.
主要成果:
- CSTR实现了与SBR相比的PHA存储能力 (高达0.65gPHA gVSS-1).
- 在基质转化为生物质的收益率上,CSTR的效率提高了50%.
- 选择有效地发生在VFA丰富的原料上,其中含有过多的 (N) 和 (P),而不仅仅是P限制条件.
- 微生物群落主要受营养可用性 (N,P) 而不是反应堆类型 (CSTR与SBR) 的影响.
- 动态的N/P过量条件有利于PHA储存的细菌,如Comamonas,导致PHA储存的最高水平.
结论:
- 一个简单的CSTR是选择高PHA储存生物质的可行和高效的SBR替代方案.
- CSTRs能够从更广泛的原料中生产PHA,包括那些含有过多营养素的原料.
- 这一进步有助于从市政废水中大规模实施PHA生物塑料.
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