单级自养脱氮工艺氨氮去除途径研究

以SBBR单级自养脱氮系统的污泥为对象，采用不同的人工模拟废水为反应器进水，通过批式试验的方式研究了单级自养脱氮系统内的中间产物及氮素平衡情况，并探讨了氨氮的去除途径.结果表明，以仅含氨氮的人工模拟废水为进水，在未投加有机碳源的条件下，系统内62％的氨氮被转化为NO^-₂、NO^-₃、NH₂ＯH、N₂Ｈ₄、NO、NO₂、N₂Ｏ和N₂等一系列氮化合物，其中N₂占90.07％.单级自养脱氮系统内的氨氮是由多种途径去除的.4.5％的氨氮是在吹脱等物化作用下去除的，不超过3.73％的氨氮是通过传统的硝化反硝化途径去除的，53.77％的氨氮是由自养脱氮途径去除的，自养脱氮反应起主要的脱氮作用，且自养脱氮反应可以通过2条代谢途径来实现.但在足够NO₂存在并且缺氧的条件下，单级自养脱氮系统内的出水氨氮浓度与空白反应器相当，NH⁺₄并没有被亚硝化单胞菌以NO₂为电子受体氧化为NO^-₂和N₂等化合物而得以去除，可能是因为系统内不存在该类型的亚硝化功能菌.

Mechanism of Ammonium Removal in the Completely Autotrophic Nitrogen Removal in One Reactor Process

Different synthetic wastewaters were used in the batch tests to analyze the intermediate products and the nitrogen balance,and to study the mechanism of ammonium removal in the completely autotrophic nitrogen removal in one reactor process with the sludge cultured in the SBBR completely autotrophic nitrogen removal system.The results showed that 62% of ammonium was converted to such nitrogen compounds as NO~-_2,NO~-_3,NH_2OH,N_2H_4,NO,NO_2,N_2O and N_2 without addition of organic carbon,and N_2 took up 90.0...