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- Title
多因素对Accumulibacter 代谢机制及分支水平的影响综述.
- Authors
靳海东; 田文清; 郑亚卿; 马娟
- Abstract
"Candidatus Accumulibacter phosphatis "(Accumulibacter) is the most common polyphosphate accumulating organisms (PAOs) in wastewater treatment systems. This review provides many aspects of the effects on phosphorus removal efficiency, Accumulibacter clade level and metabolic mechanism: carbon source, temperature, electron receptor and its protonation product-free nitrous acid (FNA), and phosphorus source. A summary of different studies provided similar results: (1)The type of carbon source could change the type and content of intracellular polymer-poly-β-hydroxyalkanoate (PHA), and affected the nitrogen and phosphorus removal efficiency of enhanced biological phosphorus removal (EBPR) system. Furthermore, compared to other carbon source, in the system with propionic acid as carbon source, Accumulibacter was more enriched and the phosphorus removal efficiency was higher. (2)Low temperature environment was conducive to the growth of Accumulibacter, while its natural rival bacteria "Candidatus Competibacter phosphatis" (Competibacter) showed competitive advantages in high temperature environment. (3)Under FNA inhibition and phosphorus deficiency conditions, Type Ⅱ of Accumulibacter (PAO Ⅱ) showed strong tolerance and flexible metabolic mechanism transformation. However, no study had established the relationship between functional bacteria and phosphorus removal efficiency in EBPR system yet. Therefore, cultivation of a single species and its clades, as well as study on the relationship between a single bacterial species and other bacterial groups, both are beneficial to provide theoretical support for the further improvement of the phosphorus removal efficiency and stability in EBPR system.
- Subjects
PROPIONIC acid; NITROUS acid; WASTEWATER treatment; LOW temperatures; HIGH temperatures
- Publication
Environmental Science & Technology (10036504), 2023, Vol 46, Issue 5, p56
- ISSN
1003-6504
- Publication type
Article
- DOI
10.19672/j.cnki.1003-6504.1268.22.338