Intensification of ozonation processes in a novel, compact, multi-orifice oscillatory baffled column
journal contributionposted on 13.06.2016, 14:57 authored by Marco S. Lucas, Nuno Reis, Gianluca Li-PumaGianluca Li-Puma
A novel approach for the intensification of ozonation of water and wastewater is presented using a highly efficient and compact Multi-Orifice Oscillatory Baffled Column (MOBC) ozonation contactor. The MOBC uniquely yielded full (i.e. 100%) use of the ozone supplied with a very short (2.25 min) liquid contact time under continuous operation and reducing the need of further gas-liquid contacting equipment downstream from the MOBC. The increased performance of the MOBC ozonation reactor was benchmarked against a bubble column (BC) design and resulted in 20% increase on the rate of p-hydroxybenzoic acid (p-HBA) degradation, 75% increase in the rate of mineralization of p-HBA per mole of ozone consumed, and 3.2-fold increase in the rate of mineralization of p-HBA per mole of ozone supplied. This results from the very small size of bubbles (few hundreds of microns) and enhanced gas-liquid mass transfer and hold-up generated in the presence of small fluid pulsations and orifice baffles.
This paper was funded by the Enterprise Office and the Enterprise Project Group of Loughborough University for funding the EPSRC Impact Acceleration Account project (EPG55-P4, EPG64-P2).
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