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## Meet the editor

Sevcan Aydin is a professor in the Biology Department, Istanbul University, Turkey. She earned her bachelor's degree from the Biology Department, Ege University, Turkey, followed by a Ph.D. from the Environmental Biotechnology Program, Istanbul Technical University in 2015. Dr. Aydin achieved a professorship in environmental engineering, and her research interests encompass environmental biotechnology, renewable

energy production, bioremediation, and environmental engineering. She has published forty-nine scientific articles in high-impact journals and supervised two doctoral and eight master's theses. Dr. Aydin teaches biotechnological approaches to water treatment, environmental technologies, and bioenergy production methods. Her specialization lies in enhancing the bioenergy potential of different wastes and developing cost-effective methods for the bioremediation of polluted soil.

## Contents


Preface

Anaerobic digestion is a process that converts organic matter into biogas, a valuable source of energy that contains mainly methane and other impurities such as hydrogen sulfide, carbon dioxide, water vapor, siloxanes, hydrocarbons, oxygen, ammonia, carbon monoxide, and nitrogen. Anaerobic digestion is not only a natural and eco-friendly way of producing biogas but also a way of treating waste materials and reducing greenhouse gas emissions, which are major challenges for the world in the era of fossil fuel depletion, climate change, and environmental pollution. Moreover, anaerobic digestion has many other benefits, such as reducing the volume and mass of waste, eliminating odors and pathogens, generating digestate as a nutrient-rich fertilizer, conserving land and water resources, creating jobs and income opportunities, and mitigating climate change. Therefore, anaerobic digestion is a promising technology for the future of waste management and energy production. As the demand for biomass-based energy has increased in recent years, due to the challenges posed by the depletion of fossil fuels, climate change, and environmental pollution, this book, *Anaerobic Digestion – Biotechnology for Reactor Performance and Environmental Sustainability*, offers a comprehensive overview of the latest developments and approaches in anaerobic digestion. The book consists of six chapters, each covering a

Chapter 1 examines the most prevalent physicochemical technologies for biogas upgrading and CO2 removal, along with some novel findings and possible improvements. It also evaluates different methods of producing biomethane from biogas. It gives a thorough description of the main principles of different biogas upgrading approaches, and their biomethanation efficiency. It also addresses the challenges and

Chapter 2 focuses on the sludge-water mixing process in anaerobic reactors, which is essential for the anaerobic degradation of organic matter in wastewater. It explains the concept of CSTBR (completely stirred tank bioreactor) mode, which requires low mixing intensity and good sludge morphology and mass transfer. It compares two types of confined sludge anaerobic reactors, up-flow anaerobic sludge blanket (UASB) and internal reflux packed-bed, which can achieve CSTBR mode by organiz-

ing the water flow with anaerobic sludge in attached or aggregated state.

Chapter 3 presents the results of a research study and explores the chemical and thermal properties of cow manure–water mixtures for biogas production. The chapter shows how the specific heat capacity and chemical composition of cow manure–water mixtures vary with temperature and mixing ratio, and how they affect the biogas

Chapter 4 provides mathematical modeling and applied calculation of bioconveyer and anaerobic biofiltration. The chapter develops and presents a theoretical framework along with an engineering methodology for evaluating the performance of

different aspect of anaerobic digestion technology.

yield and quality.

opportunities for further development of these technologies.
