ASBR反应器厌氧氨氧化脱氮II:反应动力学

研究了ASBR厌氧氨氧化(ANAMMOX)反应器稳定条件下周期内的基质动力学特性以及过程抑制动力学特性,并得到适合描述上述特性的动力学模型.其中,稳态下周期内基质去除模型是首次被调查研究,研究发现,修正的Logistic模型和修正的Boltzmann模型相比Grau二级基质去除模型和修正的Gompertz模型而言,更适合描述稳态下周期内基质去除特性,并且通过模型得到了周期内任意t时刻下的出水总氮和总氮去除率预测公式.运用Haldane模型和Aiba模型建立了出水FA浓度与总氮去除负荷(TN RR)以及出水NO2--N浓度与总氮去除负荷(TN RR)之间的关系,结果表明:Haldane模型更适合用来描述基质抑制动力学特性,模型预测得到的出水FA和出水NO2--N抑制浓度分别为72.36mg/L和140.60mg/L.上述动力学模型的应用和动力学参数的获得可能会有助于ASBR反应器的优化设计和过程控制.

Nitrogen removal in the Anammox sequencing batch reactor II: Kinetics characteristics

To investigate the kinetics characteristics of nitrogen removal at single cycle under pseudo-steady-state condition, the kinetics characteristics of inhibition period and the most suitable models were obtained from the process. The kinetics characteristics of nitrogen removal at single cycle of ANAMMOX process under pseudo-steady-state condition were first evaluated. The results showed that the modified Logistic model and the modified Boltzmann model were found to be the appropriate models to describe the performance of the ASBR at single cycle under pseudo-steady-state condition. Moreover, the effluent total nitrogen and the total nitrogen removal at any time of the cycle were obtained. The relationship between the effluent FA and the TN removal rate and the relationship between the effluent NO2--N and the TN removal rate were established by the Haldane model and the Aiba model, suggesting the Haldane model was more appropriate to predict the values. According to Haldane model, the inhibition concentrations of the effluent FA and the effluent NO2--N were suggested as 72.36mg/L and 140.60mg/L, respectively. These models and parameters might be used in ASBR reactor design and control.