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Article Abstract
This study aimed to evaluate the performance of a high rate nitrogen removal lab-scale ANAMMOX reactor, namely Internal Circulation (IC) reactor, for old landfill leachate treatment. The reactor was operated with pre-treated leachate from a pilot Partial Nitritation Reactor (PNR) using a high nitrogen loading rate ranging from 2 to 10kgNmd. High rate removal of nitrogen (9.52±1.11kgNmd) was observed at an influent nitrogen concentration of 1500mgNL. The specific ANAMMOX activity was found to be 0.598±0.026gN-NgVSSd. Analysis of ANAMMOX granules suggested that 0.5-1.0mm size granular sludge was the dominant group. The results of DNA analysis revealed that Candidatus Kueneniastuttgartiensis was the dominant species (37.45%) in the IC reactor, whereas other species like uncultured Bacteroidetes bacterium only constituted 5.37% in the system, but they were still responsible for removing recalcitrant organic matter.
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| http://dx.doi.org/10.1016/j.biortech.2017.02.117 | DOI Listing |
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