Hydrodynamic characterisation of an airlift reactor for domestic wastewater treatment
by Martha Arias-Peñaranda; Rodolfo Reyna-Velarde; Rosa Olivia Cañizares-Villanueva
International Journal of Environmental Engineering (IJEE), Vol. 4, No. 3/4, 2012

Abstract: This study evaluates the hydrodynamic and mass-transfer behaviour of a 20-L airlift photobioreactor, employed for secondary wastewater treatment of domestic effluent. Gas hold-up (ε), as well as the volumetric mass transfer coefficient (k_La) was assessed as a function of superficial gas velocity (Ug) for both bi- and triphasic systems. In the experimental range of Ug investigated, the maximum k_La and ε obtained were in the order of 0.0074 s⁻¹ and 0.035 for water/air system and 0.0097 s⁻¹ and 0.026 for triphasic system respectively. The results indicate that this PBR is a good candidate for wastewater treatment, with lower power costs than other types of biological reactors.

Online publication date: Wed, 31-Dec-2014

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