Assessing Aerobic Activity During Aerobic Bioreactor Landfilling And Quantifying Gas And Water Transport Properties Of Landfill Biocovers
Download Assessing Aerobic Activity During Aerobic Bioreactor Landfilling And Quantifying Gas And Water Transport Properties Of Landfill Biocovers PDF/ePub or read online books in Mobi eBooks. Click Download or Read Online button to get Assessing Aerobic Activity During Aerobic Bioreactor Landfilling And Quantifying Gas And Water Transport Properties Of Landfill Biocovers book now. This website allows unlimited access to, at the time of writing, more than 1.5 million titles, including hundreds of thousands of titles in various foreign languages.
Assessing Aerobic Activity During Aerobic Bioreactor Landfilling and Quantifying Gas and Water Transport Properties of Landfill Biocovers
A bioreactor landfill cell was operated aerobically to evaluate the effect of adding water and injecting air on anaerobic activity. Temperature readings and landfill gas composition were monitored and recorded in the main header line and in tubes installed throughout the cell to assess the efficiency of aerobic operations. Over a six month period of operation, the percent of the waste degraded anaerobically ranged between 16 to 68%, suggesting that a significant fraction of the waste degraded anaerobically despite attempts to achieve uniform air flow. Local measurements of gas composition indicated that even when local oxygen concentrations exceeded ~15% significant anaerobic activity persisted in some locations. Supplementing these data, laboratory tests were conducted to quantify the gas and water transport properties of landfill biocovers, which are intended to oxidize methane leaking from landfills. Compost-woodchip and green waste have been used as landfill cover materials, but traditional soil models were employed to describe fluid transport. Because gas diffusion is one of the most critical factors controlling methane oxidation in these cover materials, proper descriptions of fluid transport are essential for robust models of methane oxidation. The gas diffusion coefficient, air permeability, water retention and saturated and unsaturated hydraulic conductivity of disturbed and undisturbed compost-woodchip and green waste samples were measured over a wide range of moisture contents and evaluated against existing models that predict these parameters. Gas diffusion was overestimated by an average of 14% using the traditional Millington-Quirk model used for soils for all data, but the error increased to 62% for dry conditions (air-filled porosity>0.60). Models developed for soils with bimodal pore domains describe the gas diffusion and water flow data best, suggesting that dual-domain descriptions are needed to properly model fluid transport in the field.
Soil Aeration and Its Role for Plants
"This book is directed to the interests of workers on soil aeration. Due to the interdisciplinary nature of the subject it may also be read by researchers, teachers, and students of agronomy, soil physics, soil chemistry, soil biology, ecology, and plant physiology."--Provided by publisher.
Sustainable Food Waste-to-Energy Systems
Sustainable Food Waste-to-Energy Systems assesses the utilization of food waste in sustainable energy conversion systems. It explores all sources of waste generated in the food supply chain (downstream from agriculture), with coverage of industrial, commercial, institutional and residential sources. It provides a detailed analysis of the conventional pathways for food waste disposal and utilization, including composting, incineration, landfilling and wastewater treatment. Next, users will find valuable sections on the chemical, biochemical and thermochemical waste-to-energy conversion processes applicable for food waste and an assessment of commercially available sustainable food waste-to-energy conversion technologies. Sustainability aspects, including consideration of environmental, economic and social impacts are also explored. The book concludes with an analysis of how deploying waste-to-energy systems is dependent on cross-cutting research methods, including geographical information systems and big data. It is a useful resource for professionals working in waste-to-energy technologies, as well as those in the food industry and food waste management sector planning and implementing these systems, but is also ideal for researchers, graduate students, energy policymakers and energy analysts interested in the most recent advances in the field. - Provides guidance on how specific food waste characteristics drive possible waste-to-energy conversion processes - Presents methodologies for selecting among different waste-to-energy options, based on waste volumes, distribution and properties, local energy demand (electrical/thermal/steam), opportunities for industrial symbiosis, regulations and incentives and social acceptance, etc. - Contains tools to assess potential environmental and economic performance of deployed systems - Links to publicly available resources on food waste data for energy conversion