Appropriate Fe (II) addition significantly enhances anaerobic ammonium oxidation (Anammox) activity through improving the bacterial growth rate.
Appropriate Fe (II) addition significantly enhances anaerobic ammonium oxidation (Anammox) activity through improving the bacterial growth rate.
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DOI：
10.1038/srep08204
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发表时间：
2015-02-03
影响因子：
4.6
通讯作者：
Ni BJ
中科院分区：
文献类型：
--
作者：
Liu Y;Ni BJ
厌氧氨氧化（Anammox）工艺的应用往往受到厌氧氨氧化菌生长缓慢的限制。Fe（II）作为厌氧氨氧化污泥培养所必需的基质元素，对厌氧氨氧化菌的生长有重要影响。本工作系统地研究了Fe（II）的添加对厌氧氨氧化活性的影响的基础上的比生长速率的动力学分析使用的数据，从一个丰富的厌氧氨氧化污泥在不同的投加水平的批试验。结果清楚地表明，适当的Fe（II）剂量（即，0.09 mM）显着提高了特定的厌氧氨氧化物生长速率高达0.172 d-1相比，0.118 d-1在常规的Fe（II）水平（0.03 mM）。 Fe（II）浓度和比厌氧氨氧化生长速率之间的关系被认为是典型的底物抑制动力学，这是集成到目前建立良好的厌氧氨氧化模型来描述与Fe（II）的添加增强的厌氧氨氧化生长。集成的厌氧氨氧化模型的有效性进行了验证，从三个独立的厌氧氨氧化反应器与不同的Fe（II）投加水平的长期实验数据。这种基于Fe（II）的方法可以潜在地实施以提高厌氧氨氧化技术的可能主流应用的处理速率，以用于能量自给自足的废水处理。
The application of anaerobic ammonium oxidation (Anammox) process is often limited by the slow growth rate of Anammox bacteria. As the essential substrate element that required for culturing Anammox sludge, Fe (II) is expected to affect Anammox bacterial growth. This work systematically studied the effects of Fe (II) addition on Anammox activity based on the kinetic analysis of specific growth rate using data from batch tests with an enriched Anammox sludge at different dosing levels. Results clearly demonstrated that appropriate Fe (II) dosing (i.e., 0.09 mM) significantly enhanced the specific Anammox growth rate up to 0.172 d−1 compared to 0.118 d−1 at regular Fe (II) level (0.03 mM). The relationship between Fe (II) concentration and specific Anammox growth rate was found to be well described by typical substrate inhibition kinetics, which was integrated into currently well-established Anammox model to describe the enhanced Anammox growth with Fe (II) addition. The validity of the integrated Anammox model was verified using long-term experimental data from three independent Anammox reactors with different Fe (II) dosing levels. This Fe (II)-based approach could be potentially implemented to enhance the process rate for possible mainstream application of Anammox technology, in order for an energy autarchic wastewater treatment.
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