Temperature effects on the oxygen transfer rate between 20 and 55°C

Review of the use of aerobic thermophilic bioprocesses for the treatment of swine waste

“…Initially, some authors pointed out that thermophilic conditions could result in lower oxygen transfer rates due to the decrease of oxygen solubility at high temperature (Graczyk and Kolaczkowski, 1980). Further studies showed that this phenomenon is completely compensated by a concomitant increase of the K L a, which is the overall oxygen transfer coefficient (Aiba et al, 1984;Boogerd et al, 1990;Vogelaar et al, 2000). Actually, the combination of a thermophilic temperature and a high organic load (sludge, manure) seems to increase the oxygen transfer rate since OTE between 70% and 100% have been reported by different authors (USEPA, 1990;Skjelhaugen, 1999).…”

Temperature dependence of stream aeration coefficients and the effect of water turbulence: A critical review

“…Reaeration is a critical parameter in gas flux studies/modelling at the aireliquid interface both in civil engineering and industrial processes Vogelaar et al, 2000;Huisman et al, 2004), as well as environmental studies, such as dissolved gas concentration (e.g. oxygen partial pressure/ concentration stress on animal), green house gas (GHG) emission, denitrification (open channel method), and stream metabolism (GPP, ER) e see e.g.…”

“…Gulliver et al (1990) investigated the temperature dependence for gas transfer across bubbleewater interface. The temperature effect upon the gas coefficients was successfully tested on Gameson et al (1958) data, and under a given turbulence intensity, by Urban and Gulliver (2000) on the diffused aeration system of Vogelaar et al (2000). This approach was also used for aerated tank and water reservoir with micro-and macro-bubbles Schierholz et al (2006).…”

Oxygen Transfer Characteristics of an Ejector Aeration System

“…14 it can be seen that the volumetric mass transfer coefficients remained nearly constant over the specified temperature range for the ejector aeration system and showed a slight increase for the blower aeration system. Therefore, it can be concluded that oxygen transfer rate is only slightly affected by aerating water temperature [22,24].…”

“…An increasing temperature results in lower oxygen solubility due to the smaller driving force (C st -C t ) and the decrease of persistence time of entrained air bubbles resulting from the increased buoyancy force. However, the diffusion rate of oxygen increases with increasing aerating water temperature, while the aerating water viscosity and surface tension decrease [21][22][23]. In general, these effects result in an increased oxygen mass transfer rate that might offset the lower oxygen solubility as shown in Figs.…”