Emerging Technologies and Biological Systems for Biogas Upgrading systematically summarizes the fundamental principles and the state-of-the-art of biogas cleaning and upgrading technologies, with special emphasis on biological processes for carbon dioxide (CO2), hydrogen sulfide (H2S), siloxane, and hydrocarbon removal. After analyzing the global scenario of biogas production, upgrading and utilization, this book discusses the integration of methanation processes to power-to-gas systems for methane (CH4) production and physiochemical upgrading technologies, such as chemical absorption, water scrubbing, pressure swing adsorption and the use of membranes. It then explores more recent and sustainable upgrading technologies, such as photosynthetic processes using algae, hydrogen-mediated microbial techniques, electrochemical, bioelectrochemical, and cryogenic approaches. H2S removal with biofilters is also covered, as well as removal of siloxanes through polymerization, peroxidation, biological degradation and gas-liquid absorption. The authors also thoroughly consider issues of mass transfer limitation in biomethanation from waste gas, biogas upgrading and life cycle assessment of upgrading technologies, techno-economic aspects, challenges for upscaling, and future trends.Providing specific information on biogas upgrading technology, and focusing on the most recent developments, Emerging Technologies and Biological Systems for Biogas Upgrading is a unique resource for researchers, engineers, and graduate students in the field of biogas production and utilization, including waste-to-energy and power-to-gas. It is also useful for entrepreneurs, consultants, and decision-makers in governmental agencies in the fields of sustainable energy, environmental protection, greenhouse gas emissions and climate change, and strategic planning.
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Table of Contents
Part I: Introduction1. Status of biogas production, biogas upgrading: A global Scenario
Part II: Physiochemical upgrading systems 2. Chemical Absorption amine absorption/stripping technology for biogas upgrading3. Water scrubber for biogas upgrading developments and innovations4. Factor affecting CO2 and CH4 separation during biogas upgrading in a water scrubbing process5. Recent development on pressure swing adsorption for biomethane production6. Membrane based technology for methane separation from biogas7. Cryogenic techniques an innovative approach for biogas upgrading8. Power-to-gas for methanation9. Electrochemical approach for biogas upgrading10. Siloxanes removal from biogas and emerging biological techniques
Part III: Biological upgrading systems 11. Hydrogen sulfide removal for biogas upgrading and emerging bioprocess (H2S) 12. Biological upgrading of biogas through CO2 conversion to CH413. Bioelectrochemical system of biogas upgrading and methane enrichment14. Photosynthetic biogas upgrading: an attractive biological technology for biogas upgrading
Part IV: Policy implications for biogas upgrading 15. Biogas upgrading and life cycle assessment of different biogas upgrading technologies16. Anaerobic digestion, techno-economic implications and governmental policies for the promotion of biomethantion technologies17. Large scale biogas upgrading plants: Future prospective and technical challenges