Department of Biosystems Engineering, Ghent University, Coupure links 653, 9000 Gent, Belgium.
Environ Technol. 2010 Oct;31(11):1271-80. doi: 10.1080/09593331003702746.
Autotrophic nitrogen removal through sequential partial nitritation and anammox reactions can be achieved in biofilm reactors by controlling the oxygen concentration in the bulk liquid in such a way that nitrite oxidizers are outcompeted by anammox bacteria. In the case of granular sludge reactors, the granule size may influence the optimal range of oxygen concentration, as has been confirmed in the present study by means of numerical simulations. The range of oxygen concentrations for which combined partial nitritation and anammox conversion is established becomes broader for larger particles and with increasing influent ammonium concentrations. At the same time the likelihood of nitrite accumulation in the reactor effluent also increases.
通过控制生物膜反应器中主体液相中的氧浓度，可以实现通过序批式亚硝化和厌氧氨氧化反应的自养脱氮，使得亚硝酸盐氧化菌被厌氧氨氧化菌所抑制。在颗粒污泥反应器的情况下，颗粒大小可能会影响最佳的氧浓度范围，本研究通过数值模拟证实了这一点。对于较大的颗粒和较高的进水氨氮浓度，建立同时进行部分亚硝化和厌氧氨氧化转化的氧浓度范围变得更宽。同时，亚硝酸盐在反应器出水中积累的可能性也增加。
