Advances in Sustainable Applications of Microalgae discusses different mechanisms used by microalgae to treat various gaseous streams, wastewaters, and pollution bioremediation. In addition, the advantages of the application of microalgal biomass in the agricultural and food/feed sectors are presented and bioenergy from microalgae with a view to sustainability is explored. The present covers the use of microalgal cultures in various applications, such as: the treatment of gaseous streams by removing various contaminants, wastewater treatment through the removal of several pollutants, biomass valorization for agriculture purposes, bioenergy from microalgae, and industrial integration of all these processes in a biorefinery concept. Finally, the book emphasizes the importance of gathering scientific knowledge to overcome drawbacks related to microalgal production and develops the concept of biorefinery based on microalgal biomass for a more sustainable future.