The publisher regrets that some errors were introduced in the Nomenclature section, Table 1 and page 5707 during the proofreading of the above paper. In addition, due to an error in production, the layout on page 5707 was presented incorrectly. We wish to apologise to the authors and to the readers for any inconvenience caused by these errors.

In the Nomenclature section, the correct terms are:

kLa

volumetric mass transfer coefficient (1/s)

n

bubble number density (1/m3)

In Table 1, for ‘Zone 5, air bubble density flux from diffusers', the Units column should read:

1/(m3·s)

On page 5707, the correct sentence is:

This kL gives kLa = 2.1 × 10−4 1/s (0.75 1/h, 0.013 1/min) when a = 30 m2/m3 (Equation (12)) and is in the range of typical values for bubble columns (Wilhelms & Martin 1992; kLa = 0.72 1/h, Mohan et al. 2021; kLa = 0.013 1/min).

In addition, on page 5707, the layout should be as follows:

  • ○ Normal outflow velocity (from plant SCADA), flow to downstream zone 6 leaving zone 5 over cross-sectional baffle wall top and bottom openings area

    • – Gas boundary condition

  • ○ No gas flux

  • • Outlet DO

    • – Outflow by convection

  • • Tank walls and bottom

    • – No slip condition

  • • Oxygen from atmosphere excluded

The calculational three-dimensional domains were unstructured meshes with 199,832 cells for the OF 0.1 m case, 172,077 cells for the OF 0.35 m case and 170,728 cells for the OF 0.6 m case. ...

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