Journal
SCIENTIFIC REPORTS
Volume 5, Issue -, Pages -Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/srep13048
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Funding
- Beijing Natural Science Foundation [8154041]
- Natural Science Foundation of China [51478013]
- Training Programme Foundation for the Talents in Beijing [2014000020124G043]
- State Key Laboratory of Pollution Control and Resource Reuse Foundation [PCRRF13005]
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Achieving nitrogen removal from domestic wastewater using anaerobic ammonium oxidation (anammox) has the potential to make wastewater treatment energy-neutral or even energy-positive. The challenge is to suppress the growth of nitrite-oxidizing bacteria (NOB). This study presents a promising method based on intermittent aeration with low dissolved oxygen to limit NOB growth, thereby providing an advantage to anammox bacteria to form a partnership with the ammonium-oxidizing bacteria (AOB). The results showed that NOB was successfully suppressed using that method, with the relative abundance of NOB maintained between 2.0-2.6%, based on Fluorescent in-situ Hybridization. Nitrogen could be effectively removed from domestic wastewater with anammox at a temperature above 20 degrees C, with an effluent total nitrogen (TN) concentration of 6.6 +/- 2.7 mg/L, while the influent TN and soluble chemical oxygen demand were 62.6 +/- 3.1 mg/L and 88.0 +/- 8.1 mg/L, respectively.
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