Abstract
Nitritation is an innovative biological nitrogen removal method in wastewater, and it has the advantages of energy and economy. The correlation between a nitrite conversion rate and the gene copy numbers of ammonia oxidizing bacteria (AOB) in a nitritation reactor was examined to measure the effectiveness of removing a nitrogen content in a biological nitrogen removal process, using a biological process of nitritation. A laboratory scale reactor was prepared and operated for over a year, using digester supernatant to induce a stable nitritation, and to optimize the operational conditions by adjusting various operating factors. The relationship between operational results of nitritation reactor and the AOB gene copies was approximated through identification and quantitative analysis of AOB. A stable nitritation can be artificially led with the control of SRT, while treating anaerobic digester supernatant from MWTPs. And AOB gene copies showed a correlation with free ammonia (FA) inhibition and performance of nitritation, and AOB activity. Thus, AOB gene copies were found important when it comes to analyzing nitritation.
| Original language | English |
|---|---|
| Pages (from-to) | 289-297 |
| Number of pages | 9 |
| Journal | Environmental Earth Sciences |
| Volume | 72 |
| Issue number | 1 |
| DOIs | |
| State | Published - Jun 2014 |
UN SDGs
This output contributes to the following UN Sustainable Development Goals (SDGs)
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SDG 6 Clean Water and Sanitation -
SDG 11 Sustainable Cities and Communities
Keywords
- Ammonia oxidizing bacteria (AOB)
- Municipal wastewater treatment plant (MWTP)
- Nitritation
- Nitrite
- Recycle water
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