The third instalment of our popular WIRC colloquia series, the final event of 2020, showcases the research of current CSCT doctoral student Liana Zoumpouli, and former WISE CDT student Paul Bayle.
Due to the ongoing pandemic, this event will be held online via Microsoft Teams.
Make sure to register on EventBrite via the link below. A link to the event will be distributed to registered attendees via email.
Micropollutant degradation, product formation and mass transfer in ozonation water treatment.
Ozone is widely used in water and wastewater treatment for disinfection, removal of taste, odour and colour and degradation of trace organic contaminants (TrOCs). TrOCs, such as pharmaceuticals and personal care products, have been attracting growing attention in the last decades due to their widespread presence in the environment and their ecotoxicological effects. Ozonation of different water matrices generates a very large number of known and unknown reaction products, including bromate from bromide-containing waters and transformation products of TrOCs. Mass transfer issues may affect the ozonation process efficiency as well as the ozone reaction pathways. In order to address the major challenges surrounding ozonation, we investigated the implications of ozonation products and ozone mass transfer for the treatment of water and wastewater. Single-compound and multi-compound ozonation experiments were performed to cover a wide range of structurally diverse TrOCs providing information on their ozone reactivity and reaction products. The biodegradation of the ozonation products of selected TrOCs was investigated to assess the efficiency of advanced treatment schemes involving ozonation with biofiltration post-treatment. The use of membrane contactors for the bubble-less transfer of ozone into water and wastewater was tested as an alternative to conventional bubble-based methods.
About Liana Zoumpouli
Garyfalia Zoumpouli is a PhD student at the Department of Chemical Engineering at the University of Bath. She is part of the EPSRC Centre for Doctoral Training in Sustainable Chemical Technologies and the Water Innovation and Research Centre (WIRC). Her research focuses on water and wastewater treatment using ozonation and on the fate of trace organic contaminants in advanced treatment schemes.
Dynamic cobble berm revetment as a coastal protection: a 'work with nature' approach for coastal adaptation.
Coastlines are extremely valuable assets for many countries as they play a major role in the national and local economy. In this context, sandy coastlines are particularly challenging as they are one of the most developed types of coast but also one of the most vulnerable in terms of erosion risk. The threat of erosion is mainly driven by storms, including storm surge and waves, and long-term sea-level rise which is expected to increase in rate with the on-going climate change. In response to this forcing, sandy beaches have been and will be protected in many areas. However, most of the coastal defences, whether hard or soft, are not designed to face the combination of these threats, with storms acting on a higher water level. Therefore, there is a need to develop a sustainable coastal protection which would take these threats into account to provide a reliable protection level. In this context, dynamic cobble berm revetments, which mimic natural composite beaches that consist of a lower sandy beach and a back-shore gravel ridge, seem to be a promising solution.
The performance and behaviour of dynamic cobble berm revetments will be presented, using results from a field and large-scale laboratory flume experiment. The dynamics of the revetment, at the large and particle scale, under energetic and increasing water level conditions will be presented. The level of protection and capacity to recover from erosive conditions will be quantified. Finally, this type of protection will be assessed as a solution for coastal management within the climate change context.
About Dr Paul Bayle
Paul is currently working as a post-doctorate for the BRGM and IFREMER in Bordeaux, France. He joined these research institutes to work on the ARCADE project, which aims at extensively monitor the Arcachon lagoon to address multiple and cross-disciplinary research questions. In this project, Paul is responsible for all the field measurement campaigns, from design to data archiving. His research focuses on characterising and understanding the importance of infragravity waves in the hydro- and morphodynamics of the Arcachon inlet and lagoon.
Paul completed his PhD in October 2020 at the University of Bath, at the department of Architecture and Civil Engineering, under the supervision of Chris Blenkinsopp and Alan Hunter, and as part of the Water Informatics and Science of Engineering (WISE) Centre for Doctoral Training (CDT). He also worked as a research assistant for 6 months in the same department, while writing up his thesis. His work at the University of Bath focused on testing and understanding a novel type of ‘work with nature’ coastal protection, called ‘dynamic cobble berm revetment’. His research investigated the performance and behaviour of such protections, both in the laboratory and field, to better assess their potential for coastal adaptation under sea level rise. As part of this research, Paul co-led and co-managed two large-scale experiments at the GWK flume, Hannover, Germany.
Before joining the WISE CDT scheme, Paul completed a two-year degree in Civil Engineering at the University of Paul Sabatier in Toulouse, then a BSc degree in Earth and Environment Science at the University of Bordeaux and an MSc degree in Oceanography at the University of Southampton (Master MER). His MSc thesis was completed at the Griffith Centre for Coastal Management (Gold Coast, Australia) on the impact of the Narrowneck submerged artificial reef on beach morphodynamics, under the supervision of Rodger Tomlinson and Darrell Strauss. As a trained operational oceanographer and scientific scuba diver, Paul has taken part of a few multidisciplinary projects and field trip.