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Book (stand-alone)Manual / guideGuía teórico-práctica sobre el biogás y los biodigestores
Proyecto para la promoción de la energía derivada de biomasa (UTF/ARG/020/ARG) - Colección Documentos Técnicos N° 12
2019Also available in:
No results found.El presente trabajo tiene como objetivo proporcionar conocimientos para la implementación de proyectos de biodigestión en diferentes escalas, para el uso energético del biogás y la revalorización económica de los efluentes orgánicos. Además, se propone difundir los conceptos teóricos y la tecnología de biodigestión anaeróbica práctica. En ese sentido, el trabajo se dividió en cuatro módulos: el primero explica los conceptos básicos de la digestión anaeróbica y caracteriza diferentes tipos de biodigestores; la segunda analiza la composición y los usos del biogás y digiere; el tercero se centra en las cuestiones esenciales para el diseño de un biodigestor y el cuarto se introduce en los cálculos de rendimiento. Finalmente, se proporciona un manual de instrucciones en el Anexo para el diseño de digestores domiciliarios y en lotes, para laboratorio. -
Book (series)FlagshipThe State of Food Security and Nutrition in the World 2021
Transforming food systems for food security, improved nutrition and affordable healthy diets for all
2021In recent years, several major drivers have put the world off track to ending world hunger and malnutrition in all its forms by 2030. The challenges have grown with the COVID-19 pandemic and related containment measures. This report presents the first global assessment of food insecurity and malnutrition for 2020 and offers some indication of what hunger might look like by 2030 in a scenario further complicated by the enduring effects of the COVID-19 pandemic. It also includes new estimates of the cost and affordability of healthy diets, which provide an important link between the food security and nutrition indicators and the analysis of their trends. Altogether, the report highlights the need for a deeper reflection on how to better address the global food security and nutrition situation.To understand how hunger and malnutrition have reached these critical levels, this report draws on the analyses of the past four editions, which have produced a vast, evidence-based body of knowledge of the major drivers behind the recent changes in food security and nutrition. These drivers, which are increasing in frequency and intensity, include conflicts, climate variability and extremes, and economic slowdowns and downturns – all exacerbated by the underlying causes of poverty and very high and persistent levels of inequality. In addition, millions of people around the world suffer from food insecurity and different forms of malnutrition because they cannot afford the cost of healthy diets. From a synthesized understanding of this knowledge, updates and additional analyses are generated to create a holistic view of the combined effects of these drivers, both on each other and on food systems, and how they negatively affect food security and nutrition around the world.In turn, the evidence informs an in-depth look at how to move from silo solutions to integrated food systems solutions. In this regard, the report proposes transformative pathways that specifically address the challenges posed by the major drivers, also highlighting the types of policy and investment portfolios required to transform food systems for food security, improved nutrition, and affordable healthy diets for all. The report observes that, while the pandemic has caused major setbacks, there is much to be learned from the vulnerabilities and inequalities it has laid bare. If taken to heart, these new insights and wisdom can help get the world back on track towards the goal of ending hunger, food insecurity, and malnutrition in all its forms. -
Book (stand-alone)Manual / guideBiogas Industrial - User manual 2017
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No results found.This user manual assists in the utilization of BEFSRA biogas industrial tool. The manual provides useful definitions related to biogas digestor options, its operation and key parameters affecting production performance. After completing this manual and operate the tool, users will be able to perform the techno-economic analysis of biogas production and different potential uses for electricity generation, Cogeneration of heat and power (CHP), direct use for heating and cooking or upgrade to natur al gas. Users will be guided through a practical example on how to use the more than 450 feedstock options included in the database and that range from agriculture residues to common agro-industrial residues, for codigestion or seasonal operations. A correct use of manual and tool will provide an indication of production costs and investment; financial viability feedstock demand, and potential socio-economic benefits of biogas industrial plants.