Abstract
The combination of simultaneous nitrification-denitrification (SND) with enhanced biological phosphorus removal (EBPR) provides a more efficient and economically viable option for nutrient removal from municipal wastewater compared to conventional two-step nitrification-denitrification. This study analyzed the nutrients (N and P) profiles in a full-scale municipal wastewater reclamation plant (WRP) located in the tropical region, in which more than 90% of nitrogen was removed. Interestingly, average SND efficiency in aerobic zoneswas found to be up to 50%, whereas phosphorus profile displayed a clear cyclic release and uptake pattern with a phosphorus removal efficiency of up to 76%. The capability of sludge to perform SND and EBPR was further confirmed through a series of batch experiments. Microbial analysis revealed the presence of Accumulibacter and Tetrasphaera phosphate accumulating organisms in the plant, while few glycogen accumulating organisms (GAO) was observed. This study showed the significant occurrence of combined SND and EBPR, known as simultaneous nitrification, denitrification and phosphorus removal (SNDPR), in the studied WRP under warm climate. The possible causes behind the observed SNDPR were also discussed.
| Original language | English |
|---|---|
| Pages (from-to) | 448-456 |
| Number of pages | 9 |
| Journal | Water Science and Technology |
| Volume | 74 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - Jul 2016 |
| Externally published | Yes |
Bibliographical note
Publisher Copyright:© 2016 IWA Publishing.
ASJC Scopus Subject Areas
- Environmental Engineering
- Water Science and Technology
Keywords
- Full-scale water reclamation plant (WRP)
- Nitrite short-cut
- SNDPR system
- Step-feed activated sludge (SFAS) process
- Warm climate