This book is very important for Microbiologist, botanist, plankton professionals. I would like to give my emphasis to Environmental Engineers, environmentalist and environmental chemists to use Microalgae for wastewater treatment techniques specifically for industrial and municipal effluent treatments. We call this phycoremediation. Also The residue after microalgal remediation can be used for different valuable products, such as biofuel, cosmetic, foods etc. More over, fresh water bodies have versatile microalgae species and can be cultured, identified the species for studying the biodagradative abilities of wastewater. The result from this book conforms as, dominantly green microalgae have an ability to survive in the aquatic system and researchers can be used this species for different waste water treatment