This book has been written in a clear, lucid manner to cover theoretical and applied aspects of bioremediation of phosphate and nitrate nutrient-rich wastewater. This book describes the organophosphate pesticides-methyl parathion contaminated environment and its wastewater treatment methods implemented by sustainable technologies using microorganisms, bioremediation methods, techniques, and the ozonation process. This book is intended for postgraduate and graduate students, research scholars, and teachers of environmental sciences, microbiology, and biotechnology.