2134/21616 Marco S. Lucas Marco S. Lucas Nuno Reis Nuno Reis Gianluca Li-Puma Gianluca Li-Puma Intensification of ozonation processes in a novel, compact, multi-orifice oscillatory baffled column Loughborough University 2016 Multi-orifice oscillatory baffled column Ozonation p-Hydroxybenzoic acid Process intensification Water and wastewater treatment Chemical Engineering not elsewhere classified 2016-06-13 14:57:18 Journal contribution https://repository.lboro.ac.uk/articles/journal_contribution/Intensification_of_ozonation_processes_in_a_novel_compact_multi-orifice_oscillatory_baffled_column/9245129 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.