Journal of Food, Agriculture and Environment

Rapid enrichment and acclimation of anaerobic ammonium oxidation by using activated sludge from a landfill leachate treatment plant

Author(s):

Shaoqi Zhou ^{1, 2, 3*}, Junqin Yao ¹

Recieved Date: 2010-01-19, Accepted Date: 2010-04-06

Abstract:

The removal of nitrogen (ammonium, nitrite and nitrate) is a major concern in environmental engineering and environmental protection. Anaerobic oxidation of ammonium (anammox) process is a new biotechnology for removal of ammonium and nitrite or nitrate simultaneously. The start-up of anammox process was reported to be a long term of 105 to 420 days. This is a barrier for the application of anammox in engineering effectively. An upflow anaerobic sludge blanket (UASB)-biofilm reactor was fed with synthetic wastewater composed with ammonium and nitrite at proper NH₄⁺– N/NO₂^–-N ratio. Anammox process was achieved successfully with high removal efficiencies of NH₄⁺-N, NO₂^–-N and TN (97.6%, 95.7% and 83.1%) after 56 days of operation and acclimation, which was much lower than those reported to be more than 105 days or even as long as 420 days. The ratio of removed ammonia, nitrite and produced nitrate was 1:1.49:0.257 at the stable stage of the process. The effluent pH value kept around 8.3 and the alkalinity varied a little. The grain-sludge of brown and pink were found at the bottom of the reactor. The results of this study demonstrated that anammox process could be started rapidly and it would be a promising technology for the application of biological nitrogen removal of ammonia-rich waste waters in engineering.

Keywords:

Anammox, UASB-biofilm reactor, landfill leachate, start-up

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Journal: Journal of Food, Agriculture and Environment
Year: 2010
Volume: 8
Issue: 2
Category: Environment
Pages: 1133-1137

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