Abstract
Microalgae-based wastewater treatment (WWT) relies on the ability of phototrophic microorganisms to supply oxygen to aerobic organic pollutants degraders and enhance the removal of nutrients and pathogens. Microalgae photosynthesis also boosts biomass productivity, thereby providing new capabilities for the recovery of energy and nutrients and/or climate change mitigation. Microalgae-based WWT engineering requires optimization of light supply and biomass recovery. Various technology platforms are being researched to enable microalgae-based WWT, but full-scale implementation is currently only realistically achievable in shallow, well-mixed raceway ponds (high-rate algal ponds). While full-scale experience is limited, implementation is increasing and supported by vigorous research efforts worldwide.
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