High Intensity Pulsed LED Processing

High intensity pulsed light emitting diode (LED) technology is an emerging, flexible, cost effective green technology. We are evaluating the potential of LED technology (emitting light in the UV and visible ranges with specific wavelengths i.e., 275 nm, 365 nm, 395 nm, and 455 nm) to improve food and water safety and quality.

Research directions

  • High intensity pulsed LED based integrated process development for simultaneous pathogen inactivation and drying of foods 
  • Influence of water activity on efficacy of LED treatment to improve low water activity food safety and quality
  • Waste water treatment using pulsed LED treatment and photosensitive nanoparticles/oxidants 

Current projects

  • High intensity pulsed LED reactor development for simultaneous pathogen inactivation and drying of foods 
  • High intensity pulsed LED treatments to improve low water activity food safety
  • Graphene oxide based nano-composite films integrated with pulsed LED technology for waste water treatment
  • Microbial biofilm inactivation by pulsed LED technology

Students and Postdocs:

Amritha Jaya Prasad and Muhammad Zubair 


Dr. Michael Gänzle (Department of AFNS)

Dr. Aman Ullah (Department of AFNS)

Dr. Mirko Betti (Department of AFNS)

Dr. Xianqin Yang (Agriculture and Agri-Food Canada)


  • *Prasad, A., Gänzle, M., **Roopesh, M. S. Inactivation of foodborne pathogens using 365 nm and 395 nm high intensity pulsed light emitting diodes. (Internal Review).
  • *Du, L., *Prasad, A., Gänzle, M., **Roopesh, M. S.Inactivation of Salmonella spp. in wheat flour by 395 nm LED and the related functional and structural changes of gluten (Internal Review).
  • *Prasad, A., *Du, L., *Zubair, M., *Subedi, S., Ullah, A., **Roopesh, M. S. Application of Light Emitting Diode (LED) technology to improve water and food safety: A review. (In Preparation). 

Project Sponsors:

NSERC Discovery, Alberta Agriculture and Forestry