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These two international conferences bring together scientists, algaeneers and practitioners to exchange the latest knowledge on the application of photosynthetic microorganisms for wastewater treatment and resource recovery, covering traditional opened ponds systems and the use of photobioreactors. Wastewater engineers using photosynthetic microorganisms can benefit from knowledge coming from the use of algae to produce biofuels, food supplements or green pharmaceuticals and of purple photosynthetic bacteria. Likewise, wastewater as a cheap source of nutrients and inorganic carbon is promising for the mass production of algae-based commodities. For example, microalgae based treatment systems in developing and tropical countries may reduce wastewater treatment costs via the recovery of its inherent resources, while providing effective sanitation services. The opportunity to bring together expertise in both extensive (ponds) and intensive (photobioreactors) algal systems in a single event constitutes an unique overview and discussion platform of the latest scientific developments and practical applications in a field of research that has exponentially increased over the past decade. In this context, it is worth noticing that the number of publications in microalgae-based wastewater treatment increase from 60 in 2007 to > 1000 in 2017.


  • Algal-bacterial photo-bioreactors for wastewater treatment
  • Experimental methods, algal respirometry, monitoring, modeling and process control
  • Algal-Bacterial interactions and microbial ecology
  • Macroalgae-based technologies
  • Purple photosynthetic bacteria-based Wastewater Treatment
  • Biofuels from photosynthetic microorganisms
  • Waste gas treatment and greenhouse gas capture (including biogas upgrading)
  • Harvesting technologies
  • Algae downstream processing to valuable products
  • Algae-based biorefineries
  • Life cycle assessment
  • Advances in wastewater pond technology (cases of study and fundamental research)
IWA Conference on Algal Technologies and Stabilisation Ponds for Wastewater Treatment and Resource Recovery