Mary Barrios Hernandez

PhD fellow


Mary Luz Barrios-Hernandez was born in San Jose, Costa Rica. She is an Environmental Engineer (2011) from the Instituto Tecnologico de Costa Rica. She has an MSc in Urban Water Sanitation from UNESCO-IHE (2016). Currently, she is a Ph.D. research fellow at the Environmental Engineering and Water Technology Department at IHE Delft, supervised by Tineke Hoojmans and Hector Garcia. She also works in partnership with Biotechnology Department at TU Delft. Her promotors are Damir Brdanovic and Mark van Loosdrecht. She started her Ph.D. in May 2017 and is also involved in Costa Rica’s projects.


Assessment of the effects of warm temperatures, faecal sludge co-treatment and pathogen removal on Aerobic Granular Sludge systems.

Research Summary


  • Removal of pathogen microorganisms by aerobic granular sludge process.
  • The impact of co-treating faecal/septic tank sludge with municipal wastewater in an aerobic granular sludge process.

Research Interests

  • Biological Wastewater Treatment and Sanitation
  • Aerobic Granular Sludge
  • Pathogen removal 
  • Molecular Biology

Funding Source

CB-08-2014 - Instituto Tecnologico de Costa Rica  


Conference abstracts 

Barrios-Hernandez ML, Bettinelli C, Hooijmans CM, Garcia HA, Van de Vossenberg J, Brdjanovic D, van Loosdrecht M (2017) Fate of E. coli in Aerobic Granular Sludge and Activated Sludge laboratory wastewater treatment reactors. Poster Presentation; 1 Symposium MMWWRR, Delft, The Netherlands.


Connect with us

Never miss a thing!