School of Environmental Science and Engineering, Qingdao University, Qingdao 266071, China.
School of Environmental Science and Engineering, Qingdao University, Qingdao 266071, China.
Bioresour Technol. 2018 Feb;249:1085-1091. doi: 10.1016/j.biortech.2017.10.101. Epub 2017 Nov 4.
A sequencing batch reactor (SBR) was used to study nitrogen removal performance of marine anammox bacteria (MAB) with Mn(II) and Ni(II) addition. The reactor was operated at 25 ± 0.5 °C with influent pH of 7.5 ± 0.1. Optimal ammonium removal efficiencies (AREs) were 93.95% and 93.18% with 0.05 mM Mn(II) and 0.025 mM Ni(II), respectively. Both Mn(II) and Ni(II) played key roles in treating nitrogen-rich saline wastewater. However, the effect resulting from Ni(II) was far stronger than Mn(II). With optimal Ni(II) addition (0.025 mM), maximal nitrogen removal rate (NRR) and specific anammox activity (SAA) increased by 14.64% and 57.88%, respectively. Modified Boltzmann model was appropriate to describe nitrogen removal at low Mn(II) and Ni(II) concentrations while remodified Logistic model could be used at high Mn(II) and Ni(II) concentrations. Mn(II) and Ni(II) dosage should be controlled within 0.075 mM to achieve good nitrogen removal in nitrogen-rich saline wastewater treatment.
采用序批式反应器（SBR）研究了添加 Mn(II) 和 Ni(II) 对海洋厌氧氨氧化菌（MAB）脱氮性能的影响。反应器在 25±0.5°C 下运行，进水 pH 值为 7.5±0.1。分别添加 0.05mM Mn(II)和 0.025mM Ni(II)时，氨氮去除效率（ARE）的最优值分别为 93.95%和 93.18%。Mn(II)和 Ni(II)均对处理富氮含盐废水起着关键作用。但 Ni(II)的作用效果远强于 Mn(II)。当添加最优浓度的 Ni(II)（0.025mM）时，最大脱氮速率（NRR）和比厌氧氨氧化活性（SAA）分别提高了 14.64%和 57.88%。在低浓度 Mn(II)和 Ni(II)条件下，修正的 Boltzmann 模型适合描述氮的去除，而在高浓度 Mn(II)和 Ni(II)条件下，修正的 Logistic 模型可用于描述氮的去除。在处理富氮含盐废水中，Mn(II)和 Ni(II)的投加量应控制在 0.075mM 以内，以实现良好的脱氮效果。
