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Author: Bernhard Drosg
Publisher:
ISBN: 9781910154151
Category :
Languages : en
Pages : 38
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Author: Bernhard Drosg
Publisher:
ISBN: 9781910154151
Category :
Languages : en
Pages : 38
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Book Description
Author: Arthur Wellinger
Publisher: Elsevier
ISBN: 085709498X
Category : Science
Languages : en
Pages : 507
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Book Description
With increasing pressures to utilize wastes effectively and sustainably, biogas production represents one of the most important routes towards reaching renewable energy targets. This comprehensive reference on the development and deployment of biogas supply chains and technology reviews the role of biogas in the energy mix and outlines the range of biomass and waste resources for biogas production. Contributors provide detailed coverage of anaerobic digestion for the production of biogas and review the utilization of biogas for various applications. They consider all aspects in the biogas production chain from the origin of the biomass feedstocks, feedstock selection and preparation, the anaerobic digestion process, biogas plant equipment design and operation, through to utilization of the biogas for energy production and the residue, the digestate, which can be used as a biofertilizer. The book also addresses biogas utilization, and explores environmental impacts and commercial market applications. Table of Contents: Biogas as an energy option: An overview Part 1 Biomass resources, feedstock treatment and biogas production: Biomass resources for biogas production; Analysis and characterisation of biogas feedstocks; Storage and pre-treatment of substrates for biogas production; Fundamental science and engineering of the anaerobic digestion process for biogas production; Optimisation of biogas yields from anaerobic digestion by feedstock type; Anaerobic digestion as a key technology for biomass valorisation: Roles and contribution to the energy balance of biofuel chains Part 2 Plant design, engineering, process optimisation and digestate utilization: Design and engineering of biogas plants; Energy flows in biogas plants: Analysis and implications for plant design; Process control in biogas plants; Methane emissions in biogas production; Biogas digestate quality and utilization; Land application of digestate Part 3 Biogas utilisation: international experience and best practice: Biogas cleaning; Biogas up-grading to biomethane; Biomethane injection into natural gas networks; Generation of heat and power from biogas for stationery applications: Boilers, gas engines and turbines, combined heat and power (CHP) plants and fuel cells; Biomethane for transport applications; Market development and certification schemes for biomethane
Author: Mianfeng Zhang
Publisher:
ISBN: 9780355149289
Category :
Languages : en
Pages :
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Book Description
Renewable energy with its benefits of reducing greenhouse gas emissions and substituting depleted fossil energy plays more and more important role nowadays. Anaerobic digestion, which converts biodegradable materials through a series of biochemical conversion processes, can contribute a significant portion of renewable energy. Meanwhile, as an alternative pathway for organic waste treatment process, anaerobic digestion can successfully achieve waste treatment and renewable energy production in well-controlled anaerobic digestion system. However, the effluent from anaerobic digesters usually contains ammonia and residual organic nitrogen, as well as other nutrients, salts and organic compounds that require proper treatment in order to reduce the environmental impact and recover values. Thus, digester effluent treatment is important for the development and deployment of anaerobic digestion technologies. In order to develop an efficient organic waste to renewable energy conversion process, a thorough study including feedstock characterization, pilot scale and large scale anaerobic digester facility feasibility test, effluent treatment process efficiency evaluation and life cycle assessment of large scale anaerobic digester facility was conducted. In feedstock characterization, eight types of organic wastes including tomato waste, tomato pomace, rice straw, commercial food waste, supermarket vegetable waste and egg liquid waste were selected as representations of various organic waste sources in California. All the samples were analyzed for their physical characteristics and chemical compositions including total solids (TS), volatile solids (VS) and nutrient contents and the biogas potentials of these selected organic wastes were investigated in batch anaerobic digestion test. As a result, all the selected waste streams were determined to have relatively good biogas potentials. Commercial food waste and supermarket vegetable waste had high biogas yield of 937 ml/g VS and 809 ml/g VS. On the other hand, rice straw, chicken manure and cardboard had relatively lower biogas yields of 565 ml/g VS, 447 ml/g VS and 396 ml/g VS, respectively. Although, biogas potentials varied based on the characteristics of the waste streams, all the selected waste were considered to be good feedstocks for anaerobic digestion due to their high organic content. Co-digestion of multiple organic waste can effectively adjust C/N ratio of the feedstocks and improve biogas production. Co-digestion of manure and food waste was studied in a pilot-scale high solids, two phase, thermophilic anaerobic digestion system. A pilot scale anaerobic digester was operated for five-month with mixed food wastes and dairy manure as feedstock. During the five-month operation, dairy manure had an average total solid content of 32% and average volatile solid content of 16%. Food waste had lower average solid content of 25% but higher average VS/TS ratio of 94%. The overall average biogas yield was 613 ml/g VS and average methane content was 62%. As a result of ammonia accumulation during the operation, ammonia concentration increased over the five months and reached up 4,172 mg/L after 10-week operation. High ammonia concentration may cause inhibition to microbial activity and reduce biogas production, thus proper treatment process would be required for long term operation. An integrated system consisting of biological treatment and membrane separation was investigated and developed to recover the nutrients from the effluent of anaerobic digesters. The system design includes a continuous aerobic process to reduce organic content and remove odor and then following two steps of membrane separation (microfiltration and reverse osmosis) for nitrogen recovery. Microfiltration could effectively remove chemical oxygen demand (COD), total suspended solids (TSS) and total solids (TS) with removal efficiency of 85%, 89% and 72%, respectively. Reverse osmosis (RO) could effectively recover nitrogen from the effluent with removal efficiency of 99%. The integrated system was able to successfully recover 73% of the ammonia nitrogen from the digester effluent into concentrate stream of RO, which only accounted for 16% of the initial volume. The UC Davis Renewable Energy Anaerobic Digester (READ) facility was evaluated for the feasibility and stability of the performance of a large scale anaerobic digester system. During one year start-up operation, READ facility was able to successfully process various organic waste streams and maintain stable functional conditions. A life cycle assessment (LCA) study was also conducted to evaluate the energy and environmental impact of READ facility. The annual Green House Gas (GHG) emissions of READ was estimated to be 98.2 metric tons CO2e/year for processing approximately 13,000 tons of organic waste per year. A carbon intensity (CI) value of 5.39 CO2e/MJ of the electricity fuel produced by READ was also determined as outcome of this LCA study. This CI value indicates that anaerobic digester systems can not only be an effective waste treatment process but also become a feasible approach to meet low carbon fuel standard (LCFS).
Author: C. H. Burton
Publisher: Editions Quae
ISBN: 9780953128266
Category : Farm manure
Languages : en
Pages : 496
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Author: Matias B. Vanotti
Publisher: Frontiers Media SA
ISBN: 2889632199
Category :
Languages : en
Pages : 153
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Book Description
Global demand for mineral fertilizers is continuously increasing, while large amounts of organic wastes are being disposed without use as a resource, resulting in soil, water and air pollution. Current trends of intensification, expansion and agglomeration of livestock production result in a net import of nutrients that lead to a surplus in some production areas. Therefore, new processes and technologies to recover and re-use nutrients from both solid and liquid wastes are desirable to close the loop on the nutrient cycle in modern human society and address future scarcity of non-renewable nutrients and fossil-based fertilizers. This Research Topic aims to present scientific progress regarding processes and technologies that allow recovery and re-use of nutrients from wastes, the selective recovery of mineral nutrients (ammonia and phosphates), the production of new organic fertilizers, and evaluation of their relative agronomic efficiency. The articles within provide a stronger recognition of the importance of nutrient recovery and upcycling in the new horizons of the circular economy.
Author: Carol Sze Ki Lin
Publisher: John Wiley & Sons
ISBN: 1119502705
Category : Science
Languages : en
Pages : 282
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Book Description
A guide to the wide-variety of waste valorisation techniques related to various biomass, waste materials and by products Waste Valorisation provides a comprehensive review of waste chemistry and its application to the generation of value-added products. The authors – noted experts on the topic – offer a clear understanding of waste diversity, drivers and policies governing its valorisation based on the location. The book provides information on the principles behind various valorisation schemes and offers a description of general treatment options with their evaluation guidelines in terms of cost, energy consumption and waste generation. Each of the book's chapters contain an introduction which summarises the current production and processing methods, yields, energy sources and other pertinent information for each specific type of waste. The authors focus on the most relevant novel technologies for value-added processing of waste streams or industrial by-products which can readily be integrated into current waste management systems. They also provide the pertinent technical, economic, social and environmental evaluations of bioconversions as future sustainable technologies in a biorefinery. This important book: Presents the most current technologies which integrate waste and/or by-product valorisation Includes discussions on end-product purity and life-cycle assessment challenges Explores relevant novel technologies for value-added processing of waste streams or industrial by-products which can be integrated into current waste management systems Offers a guide to waste reuse, a key sustainability goal for existing biorefineries wishing to reduce material and environmental costs Written for academic researchers and industrial scientists working in agricultural and food production, bioconversions and waste management professionals, Waste Valorisation is an authoritative guide to the chemistry and applications of waste materials and provides an overview of the most recent developments in the field.
Author: Christopher Rose
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: Kalam Azad
Publisher: Woodhead Publishing
ISBN: 008102777X
Category : Science
Languages : en
Pages : 517
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Book Description
Advances in Eco-fuels for Sustainable Environment presents the most recent developments in the field of environmentally friendly eco-fuels. Dr. Kalad Azad and his team of contributors analyze the latest bio-energy technologies and emission control strategies, while also considering other important factors, such as environmental sustainability and energy efficiency improvement. Coverage includes biofuel extraction and conversion technologies, the implementation of biotechnologies and system improvement methods in the process industries. This book will help readers develop a deeper understanding of the relevant concepts and solutions to global sustainability issues with the goal of achieving cleaner, more efficient energy. Energy industry practitioners, energy policymakers and government organizations, renewables researchers and academics will find this book extremely useful. Focuses on recent developments in the field of eco-fuels, applying concepts to various medium-large scale industries Considers the societal and environmental benefits, along with an analysis of technologies and research Includes contributions from industry experts and global case studies to demonstrate the application of the research and technologies discussed
Author: Meisam Tabatabaei
Publisher: Springer
ISBN: 3319773356
Category : Technology & Engineering
Languages : en
Pages : 471
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Book Description
This book presents the state of the art in biogas production using anaerobic digestion technology, with an emphasis on waste utilization/valorization. Offering a comprehensive reference guide to biogas production from different waste streams, it covers various aspects of anaerobic digestion technology from the basics, i.e., microbiological aspects to prominent parameters governing biogas production systems, as well as major principles of their operation, analysis, process control, and troubleshooting. Written and edited by internationally recognized experts in the field of biogas production from both academia and industry, it provides in-depth and cutting-edge information on central developments in the field. In addition, it discusses and reviews major issues affecting biogas production, including the type of feedstock, pretreatment techniques, production systems, design and fabrication of biogas plants, as well as biogas purification and upgrading technologies. ‘Biogas: Fundamentals, Process, and Operation’ also addresses the application of advanced environmental and energy evaluation tools including life cycle assessment (LCA), exergy, techno-economics, and modeling techniques. This book is intended for all researchers, practitioners and students who are interested in the current trends and future prospects of biogas production technologies.
Author: Fangming Jin
Publisher: Springer Science & Business Media
ISBN: 3642544584
Category : Technology & Engineering
Languages : en
Pages : 411
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Book Description
This book reviews the recent advances in hydrothermal conversion of biomass into chemicals and fuels, and consists of 15 chapters. It introduces the properties of high-temperature water, the merits of hydrothermal conversion of biomass, and some novel hydrothermal conversion processes, mainly including hydrothermal production of value-added products, hydrothermal gasification, hydrothermal liquefaction and hydrothermal carbonization. This book introduces a new concept for counteracting the imbalance in the carbon cycle, which is caused by the rapid consumption of fossil fuels in anthropogenic activities in combination with the slow formation of fossil fuels. Accordingly, the book is useful in conveying a fundamental understanding of hydrothermal conversion of biomass in the carbon cycle so that a contribution can be made to achieving sustainable energy and environment. It is also interesting to a wide readership in various fields including chemical, geologic and environmental science and engineering. Fangming Jin is a Distinguished Professor at the School of Environmental Science & Engineering, Shanghai Jiao Tong University, China
