This book highlights the current limitations of biogas production and yield and new avenues to improving them. Biogas production and yield are among the most important renewable energy targets for our world. Pursuing an innovative and biotechnological approach, the book presents alternative sources for biogas production and explores a broad range of aspects, including: pre-treatment of substrates, accelerators (enzyme-mediated) and inhibitors involved in the process of obtaining biogas and its yield, design specifications for digesters/modified digesters, managing biogas plants, microbial risk and slurry management, energy balance and positive climatic impacts of the biogas production chain, and the impacts on Human, Animal and Environmental Health (“One Health” concept for the biogas chain).

The concern about using organic waste as a renewable energy source is a critical worldwide issue. In this area, anaerobic digestion (AD) seems to be a promising solution because of the significant reduction of waste quantity and generation of valuable products such as biogas, regarded as being a good energy carrier and digestate with high nutritional potential for agriculture. The current trends in AD focus on improving the efficiency of the process to make this a cost-effective treatment. Depending on the source (agricultural, municipal, or industrial), organic waste varies considering both its composition and structure, and thus the bioaccessibility and biodegradability. Accordingly, materials rich in carbohydrates, proteins, and fats require different operational conditions to overcome technological problems and minimize the risk of disruption or failure of the anaerobic systems. Different strategies can be used to enhance biogas production, including waste pretreatment (physical, chemical, physico-chemical, biological, and combined), two-stage AD (temperaturephased AD and two-phase AD), anaerobic co-digestion (two-substrate and multi-substrate systems), and bioaugmentation (with natural strains or specialized consortia of microorganisms and genetically modified microorganisms or their consortia). Some of them enhance its accessibility and digestibility, while others improve nutritional balance, metabolic properties, and operational factors, facilitating synergistic effect of microorganisms. This book covers the current developments in the area of enhancing biogas production.

This book focuses on biogas production by anaerobic digestion, which is the most popular bioenergy technology of today. Using anaerobic digestion for the production of biogas is a sustainable approach that simultaneously also allows the treatment of organic waste. The energy contained in the substrate is released in the form of biogas, which can be employed as a renewable fuel in diverse industrial sectors. Although biogas generation is considered an established process, it continues to evolve, e.g. by incorporating modifications and improvements to increase its efficiency and its downstream applications. The chapters of this book review the progress made related to feedstock, system configuration and operational conditions. It also addresses microbial pathways utilized, as well as storage, transportation and usage of biogas. This book is an up-to-date resource for scientists and students working on improving biogas production.

This book reports on the most recent applications of processes with a particular focus on the source and the properties of biogas and on the characteristics of the fuel cells (FCs). It describes adsorbing materials of potential interest are reviewed and the preparation methods and treatments employed to improve the adsorption properties as well as the stability and regenerability. The characterization of the chemical and physical properties involved in these processes is examined in particular detail. The book also covers aspects that concern the development of the adsorption apparatus with particular attention on the target of low residual concentration and high selectivity.High temperature FCs, such as molten carbonates (MCFCs) or solid oxides (SOFCs), are efficient, with a low environmental impact, and they can use a wide variety of fuels, such as biogas. The presence of some poisonous compounds such as sulphides, halides, and siloxanes can react with electrode catalysts and electrolyte, leading to the degradation and short lifetime of the cell. The treatment of raw biogas to obtain a FC-compatible fuel is mainly based on adsorption processes on suitable materials.

Biomethane Production from Vegetable and Water Hyacinth Waste explores the production of biomethane from vegetable waste and water hyacinth via anaerobic fermentation, focusing on effect factors, control methods and optimization. The book introduces principles and key technologies before proceeding into a deeper exploration of the fundamentals of municipal vegetable waste, such as composition, main indicators, experiment devices, and pretreatment. Processes to produce volatile fatty acids and resource recovery from anaerobic fermentation liquid and residue are described in detail. Other topics covered include the utilization of fermentation products, engineering design of a reaction tank, process parameters, and environmental and economic aspects. The practical, application-oriented approach of this book allows engineering researchers, PhD students, and industry practitioners in the field of biogas and biomethane production, biomass conversion, and waste management to immediately utilize the information it provides. - Covers the fundamentals and applications of the use of food waste and water hyacinth for biomethane production through anaerobic digestion - Explores core challenges of a biomethane production operation, including details on process optimization and control - Includes multiple case studies grounded in current industrial practice - Offers practical examples and numerical calculations for large-scale operation - Provides a representative treatment of a PPP plant considered from a process systems design perspective

Biogas Production covers the most cutting-edge pretreatment processes being used and studied today for the production of biogas. As an increasingly important piece of the "energy pie," biogas and other biofuels are being used more and more around the world in every conceivable area of industry and could be a partial answer to the energy problem and the elimination of global warming. This book will highlight the recent advances in the pretreatment and value addition of lignocellulosic wastes (LCW) with the main focus on domestic and agro-industrial residues. Mechanical, physical, and biological treatment systems are brought into perspective. The main value-added products from lignocellulosic wastes are summarized in a manner that pinpoints the most recent trends and the future directions. Physico-chemical and biological treatment systems seem to be the most favored options while biofuels, biodegradable composites, and biosorbents production paint a bright picture of the current and future bio-based products. Engineered microbes seem to tackle the problem of bioconversion of substrates that are otherwise nonconvertible by conventional wild strains. Although the main challenge facing LCW utilization is the high costs involved in treatment and production processes, some recent affordable processes with promising results have been proposed. Future trends are being directed to nanobiotechnology and genetic engineering for improved processes and products.

Encyclopedia of Renewable Energy, Sustainability and the Environment, Four Volume Set comprehensively covers all renewable energy resources, including wind, solar, hydro, biomass, geothermal energy, and nuclear power, to name a few. In addition to covering the breadth of renewable energy resources at a fundamental level, this encyclopedia delves into the utilization and ideal applications of each resource and assesses them from environmental, economic, and policy standpoints. This book will serve as an ideal introduction to any renewable energy source for students, while also allowing them to learn about a topic in more depth and explore related topics, all in a single resource.Instructors, researchers, and industry professionals will also benefit from this comprehensive reference. - Covers all renewable energy technologies in one comprehensive resource - Details renewable energies' processes, from production to utilization in a single encyclopedia - Organizes topics into concise, consistently formatted chapters, perfect for readers who are new to the field - Assesses economic challenges faced to implement each type of renewable energy - Addresses the challenges of replacing fossil fuels with renewables and covers the environmental impacts of each renewable energy

Anaerobic digestion (AD) is by far the most important technology for providing clean renewable energy to millions in rural areas of many developing countries. AD of biowastes produces both biomethane and anaerobic digestate as a byproduct that can be used further as a biofertilizer. Biowastes including sewage, food processing wastes, animal wastes, and lignocellulosic wastes typically produce biogas containing 55%–70% biomethane. In the context of energy consumption, more than 85% of the total energy consumed currently comes from non-renewable fossil resources. Biogas technology can provide sustainable, affordable, and eco-friendly energy through waste recycling. This book provides basic knowledge and recent research on biogas production, focusing on the enhancement of biomethane and production routes integrated with microalgae cultivation or agriculture.

Advanced Biofuels: Applications, Technologies, and Environmental Sustainability presents recent developments and applications of biofuels in the field of internal combustion engines, with a primary focus on the recent approaches of biodiesel applications, low emission alternative fuels, and environmental sustainability. Editors Dr. Azad and Dr. Rasul, along with their team of expert contributors, combine a collection of extensive experimental investigations on engine performance and emissions and combustion phenomena using different types of oxygenated fuel with in-depth research on fuel applications, an analysis of available technologies and resources, energy efficiency improvement methods, and applications of oxygenated fuel for the sustainable environment. Academics, researchers, engineers and technologists will develop a greater understanding of the relevant concepts and solutions to the global issues related to achieving alternative energy application for future energy security, as well as environmental sustainability in medium and large-scale industries. - Fills a gap in the literature on alternative fuel applications with in-depth research and experimental investigations of different approaches, technologies and applications - Considers the important issue of sustainability using case studies to deepen understanding - Includes energy security within various industries, including aviation and transport

The United Nations' Sustainable Development Goals (SDGs) are designed to revolutionize societies to prepare for the future challenges. However, the practical implementation of such goals in many domains is are yet to be achieved despite of unique essence. Sustainable energy production (aligned with SDG 7), clean water and sanitation (aligned with SDG 6), sustainable waste services (aligned with SDG 11), and mitigating climate change impacts (aligned with SDG 13) have been the prime focus of SDGs. Moreover, much attention is being paid to research and development activities on waste prevention, reduction, recycling, and reuse to achieve responsible consumption and production (aligned with SDG 12). Waste biorefineries have emerged as a sustainable environmental management solution to achieve not only the aforementioned SDGs, but also to accomplish no poverty (aligned with SDG 1) and zero hunger (aligned with SDG 2) and to maintain well-being and good health aligned with (SDG 3) and decent work and economic growth (aligned with SDG 8) worldwide. This is true because integrated waste biorefineries can efficiently and sustainably produce fuels, heat, energy, power, and multiple value-added products and chemicals. It can further facilitate the transition from linear to circular economies and mitigate the major challenges faced, including environmental pollution, climate change, and adverse effects on public health. This Research Topic will focus on different types of waste biorefineries, current status, practical implications, optimization of waste-to-energy technologies, detailed life assessment studies, and future opportunities with a vision to achieve SDGs in the areas of sustainable energy generation, waste management, circular economies, and climate change mitigation. The editorial team of this special issue, consisting of world-renowned scientists including Highly Cited Researchers, welcomes submissions of original research articles, review articles, short communications, industrial and/or country/region case studies that covers the following enlisted topics: • Waste biorefineries (e.g., organic waste biorefinery, agricultural and forestry waste biorefinery, etc.) • Integration of different types of biorefineries • Sustainable development goals • Waste to energy technologies • Energy and resource recovery from biomass and other waste • Renewable and sustainable energy systems • Biomass and waste supply chain • Sustainable waste management systems • Mitigation of environmental pollution and climate change • Life cycle assessment • Sustainable circular and bio-based economies.