生物处理性能和COD分区用于从用乳酸盐,乙醇和酸盐养的活性污泥中生产PHA/EPS
Teng Sun1, Quan Yuan2, Mengjia Xiao1
1School of Ecology and Environment, Beijing Technology and Business University, Beijing, 100048, China.
Bioprocess and biosystems engineering
|February 20, 2026
概括
不同的碳来源,如乳酸盐,乙醇和酸盐冲击活性污泥. 乳酸盐最大限度地提高了多基酸盐 (PHA) 的储存,而乙醇则有利于细胞外聚合物质 (EPS) 和呼吸,同时保持了营养物质的去除.
科学领域:
- 环境生物技术 环境生物技术
- 微生物生态学 微生物生态学
- 废水处理 废水处理
背景情况:
- 增加了富含乳酸盐,乙醇和酸盐的工业侧流的可用性.
- 需要对这些基质对活性污泥碳分配的影响进行比较分析.
- 我们对基板化学如何影响多基酸盐 (PHA) 和细胞外聚合物质 (EPS) 形成的理解有限.
研究的目的:
- 为了比较乳酸盐,乙醇和酸盐在相同条件下的混合培养活性污泥中对碳分区的影响.
- 量化处理性能,包括化学氧需求 (COD) 的去除和分为PHA和EPS.
- 研究基质类型对微生物群落结构和功能的影响.
主要方法:
- 三个并行测序批量反应堆的运行,供应乳酸盐,乙醇或酸盐.
- 量化COD去除,和去除效率的量化.
- 对细胞内PHA和细胞外聚合物质 (EPS) 的碳分配分析.
- 使用测序进行微生物社区分析.
主要成果:
- 在所有反应堆中都实现了稳定的COD,总和总除去 (>80%).
- 乳酸养导致PHA回收率最高 (60.7%),并且偏好了具有更高基酸盐份额的聚P (HB-co-HV).
- 乙醇养导致高PHA (富含多甲酸),但也增加了EPS和呼吸,以蛋白质为主,化的EPS矩阵.
- 酸盐养导致PHA回收率较低 (39.6%) 和更偏向于多糖体的EPS与较弱的体信号.
- 微生物群落发生了转变,以乳酸富化为储存导向的协会,以乙醇富化为非化和EPS生产的协会,以及支持酸盐增强的生物去除的类似社区.
结论:
- 基质化学显著影响活性污泥中的碳分配,引导PHA储存和EPS形成之间的平衡.
- 乳酸是最大限度地提高PHA生产的有希望的基质,同时保持营养物质的去除.
- 乙醇和酸盐提供了替代途径,影响EPS特征和微生物社区动态,并有可能为量身定制的废水处理策略提供潜力.
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