绳类型生物膜反应器中的部分脱:使用内部与外部碳来源的性能,动力学和微生物群
Lin Sun1, Wudneh Ayele Shewa2, Kevin Bossy2
1Department of Civil and Environmental Engineering, Western University, 1151 Richmond Street, London, ON N6A 3K7, Canada.
Bioresource technology
|May 24, 2024
概括
使用内部废水碳源进行部分脱 (PDN) 是可行的,但需要优化. 升高的pH值和外部酸盐导致生物膜反应堆中酸盐的积累更高.
科学领域:
- 环境科学 环境科学
- 微生物学 微生物学
- 废水处理工程 废水处理工程
背景情况:
- 部分脱 (PDN) 对于高效的anammox工艺至关重要.
- 关于PDN和相关生物膜动态的内部废水碳来源的研究有限.
- 了解生物膜社区的进化和酶的形成是优化PDN的关键.
研究的目的:
- 评估使用初级废水和无氧预处理废水作为内部碳来源的PDN过程的可行性.
- 研究生物膜社区的进化和在绳类型生物膜反应堆中的功能性酶形成.
- 为了比较内部碳源与外部酸盐在不同pH值和生物膜厚度下的性能.
主要方法:
- 使用了绳类型的生物膜介质反应器.
- 主要废水和无氧预处理的废水被用作内部碳来源.
- 乙酸盐作为外部碳来源进行比较.
- 实验是在不同的pH值和生物膜厚度下进行的,控制的sCOD:NO3-N比率为3.
主要成果:
- 废水内部的碳来源导致生物薄膜变薄,但只有在pH值升高时才能达到适度的化物积累 (0.24g/m2/d).
- 在控制生物膜厚度的酸盐养反应器中观察到最高的亚酸盐积累量 (0.79 g/m2/d).
- 酸盐养的生物膜是多孔的,并且由脱剂Thauera主导,显示Nar,Nap和Nir减少酶的不平衡.
结论:
- 使用内部废水碳源为实施PDN过程提供了一个可持续的选择.
- 在使用内部碳来源时,为了有效的化物积累,需要优化pH和生物膜管理.
- 对微生物群落结构和酶活性的进一步研究可以提高PDN在全面应用中的效率.
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