The Study of Micro-Pressure Inner-Loop Bioreactor Oxygen Mass Transfer Characteristics

3rd International Conference on Energy Equipment Science and Engineering

Wan, L.G.^1,2,3 ; Lin, Q.^2,3 ; Bian, D.J.^2,3 ; Ren, Q.K.^2,3 ; Xiao, Y.B.^2,3 ; Lu, W.X.^1

College of Environment and Resources, Jilin University, Changchun Jilin

130021, China^1

School of Water Conservancy and Environment Engineering, Changchun Institute of Technology, Changchun Jilin

130012, China^2

Jilin Provincial Key Laboratory of Municipal Wastewater Treatment, Changchun Institute of Technology University, Changchun Jilin

130012, China^3

关键词: Clean waters;    Correlation coefficient;    Energy wastes;    Excessive aeration;    Inner loops;    Linear correlation;    Oxygen mass transfer;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/128/1/012138/pdf
DOI  :  10.1088/1755-1315/128/1/012138

来源: IOP

【 摘 要 】

The oxygen mass transfer characteristics in a Micro-Pressure Inner-Loop bioreactor (MPR) were studied by clean water oxygenation experiment, the results show that when the aeration adopt by 0.1, 0.2, 0.4, 0.6 m3•h-1, respectively, the oxygen mass transfer coefficient KLa(20) in the reactor increases with the increase of the aeration. KLa(20)shows a good linear correlation with the aeration. The rate is 0.2128 h•m-3•min-1 and the correlation coefficient R=0.993. However, the trend of EO2increases first and then decreases with the increase of aeration. When the aeration increased to 0.4 m3•h-1, the EO2reaches the maximum. If aeration increases constantly, EO2begin to decrease excessive aeration may lead to an increase in energy waste during reactor operation.