序批式反应器填充动力学对家禽废水处理的影响

Mauro de Paula Moreira, V. Perez, R. M. Sampaio, R. Alegre
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摘要

采用夹套柱式序批式反应器(SBR)对某工业家禽废水进行了生物处理研究,以验证填充步骤对工艺性能的影响。实验在总容量为7l的反应器中进行,初始体积为2l(活性污泥加原废水)。从而求解了灌浆阶段生物量浓度平衡方程。这个解可以让我们了解填充动力学,并通过生物量浓度曲线确定比生长率,即伪比生长率。然而,实际特定生长速率是由生物量曲线决定的,因此,这些速率之间的差异导致了稀释率。当底物平衡得到解决时,假设底物消耗遵循一级动力学,也进行了类似的解释。结果表明,在SBR处理工业废水过程中,填料阶段的复杂性和重要性。
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Effect of Filling Kinetic of Sequencing Batch Reactor on the Poultry Wastewater Treatment
The biological treatment of an industrial poultry wastewater was studied in a jacketed cylindrical Sequencing Batch Reactor (SBR), in order to verify the effect of the filling step in the process performance. The experiments were carried out in a reactor with 7 L total capacity, starting with 2 L initial volume (activated sludge plus raw wastewater). Thus, the equation of the biomass concentration balance during filling step was solved. This solution allows us to understand the filling kinetic and determining the specific growth rate through the biomass concentration curve, that is a pseudo specific growth rate. Nevertheless, the real specific growth rate was determined from the biomass curve and consequently, the difference between these rates resulted in the dilution rate. Similar interpretation was carried out when the substrate balance was solved but, assuming that the substrate consumption followed a first order kinetic. The results showed the complexity and importance of the filling phase during the SBR operation applied to industrial wastewater.
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