Abstract
This study developed an innovative A-B process for enhanced nutrients removal in municipal wastewater reclamation, in which a micro-aerated moving bed biofilm reactor served as A-stage and a step-feed sequencing batch reactor (SBR) as B-stage. In the A-stage, 55% of COD and 15% of ammonia nitrogen was removed, while more than 88% of the total nitrogen was removed via nitritation and denitritation, together with 93% of phosphorous removal at the B-stage where ammonia oxidizing bacteria activity was significantly higher than nitrite oxidizing bacteria activity. Meanwhile substantial phenotype of polyphosphate accumulating organisms (PAOs) was also observed in the B-stage SBR. Fluorescence in situ hybridization revealed that Accumulibacter was the dominant PAOs with undetectable Competibacter. Compared to the conventional activated sludge process, the proposed A-B process could offer a more cost-effective alternative for enhanced biological nutrients removal from municipal wastewater with less energy consumption.
| Original language | English |
|---|---|
| Pages (from-to) | 39-45 |
| Number of pages | 7 |
| Journal | Chemosphere |
| Volume | 189 |
| DOIs | |
| Publication status | Published - 2017 |
| Externally published | Yes |
Bibliographical note
Publisher Copyright:© 2017 Elsevier Ltd
ASJC Scopus Subject Areas
- Environmental Engineering
- Environmental Chemistry
- General Chemistry
- Pollution
- Public Health, Environmental and Occupational Health
- Health, Toxicology and Mutagenesis
Keywords
- A-B process
- Enhanced biological phosphorus removal
- Mainstream nitritation-denitritation
- Nitrous oxide
