化工学报2012，Vol.63Issue(10)：3284-3290,7.DOI:10.3969/j.issn.0438-1157.2012.10.039
循环曝气生物反应器的流体力学和传质特性
Hydrodynamics and mass transfer in aeration circulating bioreactor
摘要
Abstract
Aeration circulating bioreactor is one kind of bioreactor with aerating riser located at letdown area for wastewater treatment, and there often is packing in the down area as carriers for growth of microbes. Hydrodynamics and mass transfer characteristics of the bioreactor were studied by changing flux (Vl) and velocity (Uld) of circulation liquid, and variance of residence time distribution function (σ2θ). There is a better power law correlation between V, and gas flow (Vg) whether there is packing or no packing in the down area and whatever various sectional area ratios of the aerated riser and the bioreactor (Ar/Are). With increase of Ar/Are, Vl and Uld go up first and then down and the extreme values appear at Ar/Are 0. 11. Compared with the packing-free bioreactor, for packing bioreactor both V, and Uld decrease but value of σ2θ increases, so liquid mass transfer is improved. For bioreactor with parking at the conditions of Ar/Are 0. 11, liquid influent 0. 1 m3 · h-1 and the gas flow 0. 5-3. 1 m3 · h-1 , the flux of circulation liquid flow is 9-28 times larger than that of liquid influent I. E. From "0. 9 m3· h-1 to 2. 8 m3 · h-1 and σ2θ larger than 0. 9. Therefore, the aeration circulating bioreactor is of higher liquid mass transfer such as liquid mixing and diluting, and can be directly used for treatment of high concentration wastewater.关键词
循环曝气生物反应器/流体力学特性/液相传质特性Key words
circulating aerated bioreactor/ hydrodynamics/ liquid mass transfer分类
化学化工引用本文复制引用
陈英,陈荣市,陈新,陈东..循环曝气生物反应器的流体力学和传质特性[J].化工学报,2012,63(10):3284-3290,7.基金项目
浙江省公益计划(2010C31091) （2010C31091）
浙江省舟山市科技计划(092017) （092017）
浙江海洋学院大学生科技创新项目. （）
