Kinetic characteristics and modelling of growth and substrate removal by Alcaligenes faecalis strain NR
Kinetic characteristics and modelling of growth and substrate removal by Alcaligenes faecalis strain NR
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DOI：
10.1007/s00449-016-1541-9
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发表时间：
2016-04-01
影响因子：
3.8
通讯作者：
Zhang, Yi Xin
中科院分区：
文献类型：
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作者：
Chen, Jie;Zhao, Bin;Zhang, Yi Xin
粪产碱杆菌NR菌株具有在单一好氧条件下同时去除氨氮和有机碳的能力。研究了A.粪肠杆菌NR菌株进行了研究，并建立了合适的动力学模型。当初始NH 4（+）-N为80 mg/L，TOC为800 mg/L时，最大NH 4（+）-N去除率为2.27 mg/L/h，TOC去除率为30.00 mg/L/h。采用基于Monod、Contois、Moser和Teissier的单基质模型和双基质模型来描述生物过程动力学系数。因此，两个双基质模型，Teissier-Contois和Contois-Contois，被认为是适当的模型生长动力学与NH 4（+）-N和TOC作为限制性基质。通过多元回归方程求解，得到了最大生长速率（mu（max））和半饱和常数（K（S）和B（S））的动力学常数。该研究可用于进一步了解和预测异养硝化菌的性能，从而为实际污水处理过程中异养硝化菌的应用提供具体指导。
Alcaligenes faecalis strain NR has the capability of simultaneous ammonium and organic carbon removal under sole aerobic conditions. The growth and substrate removal characteristics of A. faecalis strain NR were studied and appropriate kinetic models were developed. The maximum substrate removal rate of NH4 (+)-N and TOC were determined as 2.27 mg NH4 (+)-N/L/h and 30.00 mg TOC/L/h, respectively with initial NH4 (+)-N = 80 mg/L and TOC = 800 mg/L. Single-substrate models and double-substrate models based on Monod, Contois, Moser and Teissier were employed to describe the bioprocess kinetic coefficients. As a result, two double-substrate models, Teissier-Contois and Contois-Contois, were considered to be appropriate to model growth kinetics with both NH4 (+)-N and TOC as limiting substrates. The kinetic constants of maximum growth rate (mu (max)) and half-saturation constant (K (S) and B (S)) were obtained by solving multiple equations with regression. This work can be used to further understand and predict the performance of heterotrophic nitrifiers, and thus provides specific guidance of these functional strains in practical wastewater treatment process.