空运
超压
尾水管
悬挂(拓扑)
塞流
推流式反应器模型
放大
机械
连续搅拌釜式反应器
环境科学
废物管理
化学
生物反应器
工程类
化学工程
热力学
物理
数学
有机化学
经典力学
同伦
纯数学
作者
W. A. J. van Benthum,J.H.A. van den Hoogen,R. G. J. M. van der Lans,M.C.M. van Loosdrecht,J. J. Heijnen
标识
DOI:10.1016/s0009-2509(99)00034-2
摘要
A new reactor, the biofilm airlift suspension extension (BASE) reactor, was developed for nitrification and denitrification of wastewater. It consists of an internal-loop airlift reactor, appended with an additional downcomer, the extension. The internal airlift part of the BASE reactor consists of an ideally mixed pool of liquid, air bubbles and solid particles. The extension is free of air bubbles, and particles and liquid move downward in plug flow. Overpressure in the headspace is used to control the liquid velocity in the extension, independent of the air flow rate, changing the recirculation ratio between the internal compartment and the extension. A three-phase model was developed to describe the hydrodynamic behaviour of the BASE reactor. Using the model a full-scale BASE reactor was designed. Then a scale-up/scale-down approach was applied to design and construct a pilot-scale BASE reactor (height 6 m, volume 1.7 m3), to validate the hydrodynamic model. The model predicts the measurements in a two-phase system (water and air) well.
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