An Empirical Model for Oxygen Mass Transfer Rate and Its Influencing Factors in Micro-nanometer Aeration
HU Zhanbo
LU Hui
LIU Kaihua
WU Huiling
WANG Cui
XU Mingyang
Abstract：Using the micro-nanometer aeration equipment to find out the influence of operation condition and water quality of landscape water on oxygen transfer quality in micro-nanometer aeration,it was found that volumetric oxygen transfer coefficient (KLa) is in positive correlation with air flow,at the same time,negative correlation with standard oxygen transfer efficiency(SOTE) in air flow condition of 1～6 L/min.KLa of micro-nanometer aeration and SOTE are both higher than oxygen jet aeration.Standard oxygen transfer efficiency and KLa of micro-nanometer aeration are in positive correlation with temperature in temperature condition of 20～35 ℃,and the same tendency of oxygen jet aeration.Standard oxygen transfer efficiency and KLa of micro-nanometer aeration are more susceptible to air flow than temperature.KLa of micro-nanometer aeration first rises then falling with the increase of pH,to reach the top value around pH 7.KLa is influenced by NH4C1 and turbidity of water,that is a positive correlation with turbidity,and a negative correlation with NH4C1.Empirical model is established between dissolved oxygen,different influence factors and time,the model provides the basis for landscape water governance.
Keywords：micro-nanometer aerationvolumetric oxygen transfer coefficientair flowempirical model
Publication Date：2016-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 95-99 )