Interview with research talents

Angeliki Marietou Angeliki Marietou

Angeliki’s background
I am Greek, but did my PhD studies at the University of Birmingham in the UK on the physiology and regulation of nitrate reduction in a sulfate-reducing microbe. My first postdoctoral position was at Scripps Institution of Oceanography in the United States where I explored the effects of high hydrostatic pressure on microbial communities from pristine coastal and deep-sea environments. I then moved to Denmark, at Aarhus University, where I have studied the metabolic potential of sulfate reducing microbes at low-energy environments such as deeply buried marine deposits.

Present your project
The aim of my current project is to understand the microbial mediated processes taking place in the Halfdan field formation in order to predict the effectiveness of nitrate injections in controlling souring. We measure nitrate reduction and sulfide production in produced water samples from different wells at in situ temperature and pressure conditions.

What do you expect the major challenges in your area of study will be?
The major challenge of the project will be to untangle the many different microbial processes that transform nitrogen. Another challenge would be to predict the effects of nitrate on a time scale that is much longer than that of the experiments.

How do you plan to contribute in solving these problems?
To overcome the challenges we apply an interdisciplinary approach combining basic microbiological approaches and “omics”, with direct measurements of the rates of souring using radioactive and stable isotopic tracers. We are in close collaboration with colleagues from DTU, who integrate our work into dynamic models that can predict production of sulfide under specific well conditions.

What are your expectations for your future career?
I hope I can continue doing research that is exciting and valued by my peers.