Waste from various industries contains numerous aromatic compounds that are carcinogenic in nature and have harmful impact on human health. Currently, several procedures are being used for removal of phenol (an aromatic compound) from industrial wastewater. Among these, application of enzymatic catalysis has the potential to substitute conventional methods of waste treatment. On other hand, TURNIP (Brassica napis) is widely cultivated as vegetable in different part of the world and cost effective because of its low-priced and readily availability. Turnip’s peroxidase content derived from its extract was evaluated for removal of phenolic content present in tannery wastewater. Along with cost effectiveness and greater activity, crude TURNIP extract (comprising peroxidase) is an environment friendly approach to remove phenolic contents from polluted water. This book deals with each aspect of wastewater/ tannery effluent treatment through turnip extract (turnip peroxidases) to remove the phenolic contents. Moreover, this book also comprises methodology to maximize the activity of peroxidases for utmost elimination of phenolic contaminants.