Development of a model to determine mass transfer coefficient and oxygen solubility in bioreactors

• DOI: 10.1016/j.heliyon.2017.e00248
• Publication Date: 2017-02-20T05:16:23Z
• Authors: Johnny Lee
• Keywords: Mass transfer coefficient; Degree (music)

The objective of this paper is to present an experimentally validated mechanistic model predict the oxygen transfer rate coefficient (Kla) in aeration tanks for different water temperatures. Using experimental data created by Hunter and Vogelaar, formula precisely reproduces results standardized Kla at 20 °C, comparatively better than current used ASCE 2-06 based on equation Kla20 = Kla. ([Formula: see text])(20-T) where T °C. Currently, reported values [Formula: text] range from 1.008 1.047. Because it a geometric function, large error can result if incorrect value used. Establishment such system only be made means series full scale testing over temperatures required. new predicts coefficients within 1% compared observed measurements. This breakthrough since correct prediction volumetric mass crucial step design, operation up bioreactors including wastewater treatment plant tanks, developed allows doing so without resorting multiple each individual tank under same condition effect temperature explored paper, recommended replace given by: degree Kelvin, subscripts refer Celsius; E, ρ, σ are properties water. Furthermore, using published solubility water, was found that bears linear inverse relationship with coefficient.