The textile industry segment has been continuously expanding and it is reported that the global market was US$1000 billion in 2020. Aside from the fact that textile industry could be profitable and offers several advantages for human life, this industry produces wastewater containing many harmful substances in the form of organic and inorganic moieties. Textile wastewater can lead to serious environmental problems if discharged without treatment. In this first volume of the application of biological mechanisms, processes and units are reviewed in terms of dye degradation and removal. The role of biodegradation, bioaccumulation and biosorption in bio-decolorization are discussed. The book starts with highlighting the fundamentals of aerobic and anaerobic mechanisms having different configurations. The moving bed bioreactor (MBBR), up-flow anaerobic sludge blanket reactors, sequential aerobic/anaerobic batch reactors, membrane bioreactor, etc are also covered in this edition.

Ali Khadir is an environmental engineer and a member of the Young Researcher and Elite Club, Islamic Azad University of Shahre Rey Branch, Tehran, Iran. He has published several articles and book chapters in reputed international publishers, including Elsevier, Springer, Taylor& Francis, and Wiley. His articles have been published in journals with IF of greater than 4, including Journal of Environmental Chemical Engineering and International Journal of Biological Macromolecules. He also has been the reviewer of journals and international conferences. His research interests center on emerging pollutants, dyes, and pharmaceuticals in aquatic media, advanced water and wastewater remediation techniques and technology. 

Dr. Subramanian Senthilkannan Muthu currently works for SgT Group as Head of Sustainability, and is based out of Hong Kong. He earned his PhD from The Hong Kong Polytechnic University, and is a renowned expert in the areas of Environmental Sustainability in Textiles& Clothing Supply Chain, Product Life Cycle Assessment (LCA) and Product Carbon Footprint Assessment (PCF) in various industrial sectors. He has five years of industrial experience in textile manufacturing, research and development and textile testing and over a decade's of experience in life cycle assessment (LCA), carbon and ecological footprints assessment of various consumer products. He has published more than 100 research publications, written numerous book chapters and authored/edited over 100 books in the areas of Carbon Footprint, Recycling, Environmental Assessment and Environmental Sustainability.

Overview of Biological Technologies for Azo Dye removal.- Fundamental of Aerobic and Anaerobic Processes in Dye Wastewater.- Aerobic Biological Units in Dye Removal.- Anaerobic Processes in Dye Removal.- Activated Sludge: Conventional Dye Treatment Technique.- Role of moving bed bioreactor (MBBR) in dye removal.- Up-flow Anaerobic Sludge Blanket Reactors in Dye Removal: Mechanisms, Influence Factors, and Performance.- Current Biological approaches in Dye Wastewater Treatment Review on Sequential Aerobic/Anaerobic Batch Reactors for Dye Removal.- Aerobic/Anaerobic Membrane Bioreactor in Textile Wastewater.- Constructed Wetlands in Dye Removal.