This book brings together environmental scientists and engineers to discuss the development of new approaches and methodologies which utilize microalgae for biological wastewater treatment. The researchers report their recent findings on microalgal removal of nutrients, heavy metals and other organic pollutants from sewage and industrial effluents. The technologies discussed here include biosorption and bioaccumulation of heavy metals, cell immobilization of algae, and mathematical modelling of metal uptake by cells

Effective treatment of nitrogen containing wastewater is required to prevent eutrophication and groundwater pollution. This thesis shows that effective treatment may be combined with substantial nitrogen recovery in duckweed-based waste stabilization ponds. In these ponds nitrogen is absorbed by rapidly growing duckweed and in this way turned into valuable animal feed.;The results of this research can be used to design pond systems for optimal nitrogen recovery from wastewater (via duckweed uptake, sedimentation and effluent irrigation) and reuse in both aquaculture and agriculture.