Download or read book Introduction of Microbial Nutrients in a Nuclear Fuel Waste Disposal Vault as a Result of Excavation and Operation Activities written by Simcha Stroes-Gascoyne and published by . This book was released on 1996 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Introduction of Microbial Nutrients in a Nuclear Fuel Waste Disposal Vault as a Result of Excavation and Operation Activities written by Simcha Stroes-Gascoyne and published by . This book was released on 1996 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bacterial activity could be expected in those areas of a nuclear fuel waste disposal vault that are conducive to bacterial life, i.e. where effects of heat, moisture content, radiation, and compaction would not prevent or seriously restrict bacterial life and where suitable and sufficient nutrients are present. This report assesses those bacterial nutrients that would be added inadvertently to a vault in the form of residues of materials used to excavate and operate a vault. The assessment is based on measurements of blasting material residues in the various water supplies, in excavated broken rock, and in cores drilled in old and new tunnel walls at the Underground Research Laboratory. Estimates are given for nutrients such as nitrates and organic carbon. The results indicate the source of the largest potential nutrient addition.
Download or read book Introduction of microbial nutrients in a nuclear fuel waste disposal vault as a result of excavation and operation activities written by S. Stroes-Gascoyne and published by . This book was released on 1996 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Their World A Diversity of Microbial Environments written by Christon J. Hurst and published by Springer. This book was released on 2016-05-02 with total page 391 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume summarizes recent advances in environmental microbiology by providing fascinating insights into the diversity of microbial life that exists on our planet. The first two chapters present theoretical perspectives that help to consolidate our understanding of evolution as an adaptive process by which the niche and habitat of each species develop in a manner that interconnects individual components of an ecosystem. This results in communities that function by simultaneously coordinating their metabolic and physiologic actions. The third contribution addresses the fossil record of microorganisms, and the subsequent chapters then introduce the microbial life that currently exists in various terrestrial and aquatic ecosystems. Coverage of the geosphere addresses endolithic organisms, life in caves and the deep continental biosphere, including how subsurface microbial life may impact spent nuclear fuel repositories. The discussion of the hydrosphere includes hypersaline environments and arctic food chains. By better understanding examples from the micro biosphere, we can elucidate the many ways in which the niches of different species, both large and small, interconnect within the overlapping habitats of this world, which is governed by its microorganisms.
Download or read book Canadian Journal of Microbiology written by and published by . This book was released on 1997 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings of the 1996 International Conference on Deep Geological Disposal of Radioactive Waste written by and published by . This book was released on 1996 with total page 1186 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Chemical Abstracts written by and published by . This book was released on with total page 2762 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Biological Agricultural Index written by and published by . This book was released on 1997 with total page 2984 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Microbial Issues Pertaining to the Canadian Concept for the Disposal of Nuclear Fuel Waste written by Simcha Stroes-Gascoyne and published by Pinawa, Man. : Whiteshell Laboratories. This book was released on 1994 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt: AECL Research is developing a concept for the permanent disposal of nuclear fuel waste in plutonic rock of the Canadian Shield. The Federal Environmental Assessment Review Panel has issued a set of guidelines to be used in preparing an environmental impact statement (EIS) that require the addressing of a number of microbiological factors and their potential to affect the integrity of the multiple barrier system on which the disposal concept is based. This report formulates views and positions on microbiological factors that could influence the performance of a disposal vault in plutonic rock. These include the presence and survival of microbes, biofilms, corrosion, biodegradation of emplaced materials, gas production, geochemical changes, radionuclide migration, colloid formation, mutation, pathogens, and methylation. Studies being performed to underscore and strengthen current knowledge are briefly discussed.
Download or read book Energy Research Abstracts written by and published by . This book was released on 1991 with total page 676 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Predicting the effects of microbial activity on the corrosion of copper nuclear waste disposal containers written by F. King and published by . This book was released on 1997 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Aecl has submitted an environmental impact statement (eis) to evaluate the concept of nuclear fuel disposal at depth in crystalline rock of the canadian shield. in this disposal concept used fuel would be emplaced in corrosion-resistant containers which would be surrounded by clay-based buffer and backfill materials. once groundwater is able to penetrate the buffer and corrosion-resistant container, radionuclides could be transported from the waste form to the surrounding geosphere, and eventually to the biosphere. the release of radionuclides from the waste form and their subsequent transport would be determined by the geochemistry of the disposal vault and surrounding geosphere. organic substances affect the geochemistry of radionuclides through complexation reactions that increase solubility and alter mobility, be affecting the redox of certain radionuclides and be providing food for microbes. the purpose of this study was to determine whether the buffer and backfill materials proposed for use in a disposal vault contain organics that could be leached by groundwarer in large enough quantities to complex with radionuclides and affect their mobility within the disposal vault and surrounding geosphere. buffer material, made from a mixture of 50 wt.% avonlea sodium bentonite and 50 wt.% silica sand, was extracted with deionized water to determine the release of dissolved organic carbon, humic acid and fulvic acid. the effect of radiation and heat from the used fuel was simulated by treating samples of buffer before leaching to various amounts of heat (60 degrees c and 90 degrees c) for periods of 2,4 and 6 weeks, and to ionizing radiation with doses of 25 kgy and 50 kgy. humic substances were isolated from the leachates to determine the concentrations of humic and fulvic acids and to determine their functional group content by acid-base titrations. the results showed that groundwater could leach significant amounts of organics that would complex with radionuclides such as the actinides, affecting their solubility and transport within the disposal vault and possible the surrounding geosphere. heating and radiation affect the amount and nature of leachable organics. however, one of the key parameters that needs to be addressed is the mobility of organic molecules through an intact buffer and backfill.
Download or read book Introduction to Microbiology Relevant to the Canadian Nuclear Fuel Waste Management Program written by Ann Brown and published by . This book was released on 1996 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Modelling the activity of sulphate reducing bacteria and the effects on container corrosion in an underground nuclear waste disposal vault written by F. King and published by . This book was released on 1999 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Survival of Bacteria in Nuclear Waste Buffer Materials Theinfluence of Nutrients Temperature and Water Activity written by O. Karnland and published by . This book was released on 1995 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific and Technical Basis for the Geological Disposal of Radioactive Wastes written by and published by Technical Reports Series. This book was released on 2003 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report focuses on the different functions of a repository within its life cycle and describes the processes relevant to the containment of long lived radioactive waste and other criteria influencing the long term integrity of the repository. It emphasizes the central role of safety and the importance of safety/performance assessments in the decision making process during repository development.
Download or read book Disposal of Radioactive Waste written by OECD Nuclear Energy Agency. Performance Assessment Advisory Group and published by Nuclear Energy Agency, Organisation for Economic Co-operation and Development ; Washington, D.C. : OECD Publications and Information Centre. This book was released on 1991 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effect of Manures on Food Waste Degradation in Biocell written by Md Nur Basit Zaman and published by . This book was released on 2017 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proper disposal of food waste is a challenge due to adverse effect on the environment through generation of excessive leachate and greenhouse gas (CH4). After food loss through the food supply chain, the food waste ends up mostly in landfills. A study by EPA showed food waste to be the second largest component found in landfill. However, food waste imposes major cost on landfill management, and demands a potential alternative disposal solution that can negate the adverse effects. Though anaerobic digester and composting are possible solutions for food waste disposal, the former is highly expensive while in later solution, a valuable portion of energy is lost. Among other existing alternatives biocell landfill might offer a sustainable benefit for food waste disposal by retrieving valuable energy in a cost efficient way. In addition of being capable of handling high moisture, the addition of nutrients (e.g. livestock manures) used in biocell accelerates decomposition of waste. For organic waste especially pure food waste, addition of nutrients is necessary to prevent excessive volatile fatty acid (VFA) accumulation and thus reduction of microbial activities. However, limited studies have been conducted to evaluate the effect of nutrients (livestock manure) on food waste degradation and gas generation. Therefore, the major objective of the current study was to find out the potential of nutrient (different types of manures) addition on food waste decomposition and gas generation in biocell. Current research was conducted by preparing laboratory simulated biocell food waste reactors with four combinations; a pair of control reactors containing only food waste and the other combinations including 6% cow manure, pig manure and horse manure respectively in addition to sludge as inoculum. The reactors were operated at 37°C in an environmental growth chamber. Over the operation period, the reactors were monitored for leachate and gas measurement. For leachate, pH, volume, COD and BOD5 tests were conducted while composition and volume measurements were done for the gas generated. Based on the experimental results, it was found that all the food waste reactors showed an extended lag period (more than 100 days) before methane generation. Reactors with cow manure as nutrient presented better result compared to pig manure and horse manure. However, the lag period for the reactors with food waste and cow manure were 100 days and 135 days while the other reactors were still in lag period. During about 180 days of operation peak methane generation rate for these two reactor were 350 mL/wet-lb/day and 355 mL/wet-lb/day while the cumulative methane generation was 16 liter/wet-lb and 9.5 liter/wet-lb respectively and they were still just at the rising stage of methane generation phase; percentage of methane found in these two reactors were 75.9% and 73.4% respectively. However, methane generation from other reactors were found to be negligible; in fact most of the reactors were still in the initial lag phase. Results from the current study suggested cow manure to be a possible nutrient on food waste degradation in biocell landfill. Presence of extended lag period was an issue associated with food waste, however, methane generation was satisfactory and the percentage was comparable to that of anaerobic digester.
