Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 28 for “"Animal manure"”.
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ENGINEERING INFORMATICS AND SYSTEMS MODELING FOR OPTIMIZATION OF ANIMAL MANURE MANAGEMENT
There is no doubt that animal feeding operations (AFO) significantly improve meat production at a lower cost. However, accumulative manure produced in AFOs cannot be efficiently utilized in a sustainable and economical way. How to develop the animal manure management strategy is a challenge for …
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Ecosustainable biomethane and fertilizerproduction through anaerobic co-digestionof animal manure and energy crops
… materials, low fertilising efficiency of manure and digestate, nitrate contamination of groundwater. The described emissions and energy inefficiency could involve negative environmental balances at the local scale, conflicting with the possible benefits arising from biomass energy …
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Environmental Fate of Animal Manure-associated Antibiotics and Seed-coated Pesticide in Soils
… applied to agricultural fields during manure fertilization could lead to increased antibiotic resistance. New generation, neonicotinoid pesticides pose a threat to aquatic ecosystem health due high water mobility and increased potential for non-target exposure. The objectives of this …
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Utilization of carbon-rich waste materials to reduce pesticide movement to groundwater in a sandy coarse-textured soil
… digested municipal sewage sludge (DMS), and animal manure) on pesticide adsorption, leaching, and bioactivity in a sandy coarse-textured soil.
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Soil testing and plant analysis to optimize nitrogen management in manured cornfields
<p>Land application of animal manure is widely accepted as a method of recycling plant available nitrogen (N) within agricultural systems, but there is great need to improve the efficiency of this recycling. Soil testing and plant analysis are widely accepted as important tools for managing plant …
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Design and evaluation of integrated waste to energy multigenerational systems
… The first system uses solar-based energy and animal manure waste, and the second system utilizes waste tires with geothermal energy. Finally, the third system is an underground coal gasification system in which low-grade lignite is considered waste and used as fuel. Hydrogen, ethanol, …
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Hydrothermal processes to recover energy and nutrients from liquid portion of swine manure
An integrated method for treatment of animal manure has been proposed in Environment-Enhancing Energy (E2-Energy) lab. This study aimed at evaluating the feasibility of recovering the energy and nutrients from the liquid portion of animal manure (LPAM), via physical and biological concentration and …
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Characterizing the fate and transport of chemicals of emerging concern (CECs) from swine manure during waste to energy processes
Animal manure and domestic wastewater contain chemicals of emerging concern (CECs) that can threaten ecosystems and human health. For instance, estrone (E1) and 17β-estradiol (E2) can disrupt the reproductive biology of vertebrates at very low concentrations. This study investigates the effects of …
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Reducing Ammonia Volatilization and Escherichia coli from Broiler Litter Using Multiple Applications of Sodium Bisulfate
Ammonia (NH₃) emissions from animal manure, such as poultry litter, can cause air quality problems. These emissions also result in excessive nitrogen (N) loading into aquatic environments which can lead to water quality problems where N is the limiting nutrient for eutrophication, such as the …
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Mitigation of ammonia gas from animal house using microalgae
… potential of algae to mitigate ammonia gas from animal house and to be used as a high-value animal feed. Ammonia gas emission from animal manure decomposition is a major concern in animal housing operations. Excessive ammonia gas volatilization will affect both animal and worker health and can …
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Nitrogen modeling of potato fields in the Bolivian Andes using GLEAMS
… of organic N from soil and applied animal manure. Recommendations for model improvement and development include modification to the process that determines mineralization from the soil potentially mineralizable N pool; validation of the percolation volume and nitrate leaching losses; …
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Characterization of pathogen transport in overland flow
… With an increasing number of concentrated animal operations, there is becoming a greater need to dispose of a vast amount of manure in a single, localized area. Animal manure contains a substantial amount of microbial pathogens, including Cryptosporidium parvum and rotavirus that may pose a …
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Impact of Manure Management Practices on the Environmental Fate of Antibiotics in Manure-Applied Fields
Antibiotics and antibiotic resistance genes from animal manure applied to soil as fertilizer are now among the most concerned contaminants in soil. The widespread use of antibiotics in livestock might amplify the risk of developing antibiotic resistance, causing once treatable diseases to turn …
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Synthesis and characterization of starch-based cationic flocculants for harvesting microalgae.
… involving live algae grown in fresh water or animal manure. The harvest efficiency was affected by DS of the cationic starch, flocculant dosage, pH, and flocculation time. The cationic starch based flocculant performed better than CPAM in all conditions. Pilot scale cationic starch production …
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Assessment of change in smallholder farmers’ livelihoods due to land degradation in Ludewa district, Tanzania
… by increasing use of new crop varieties and animal manure, limiting field size and increasing land fragmentation. In addition, there was limited agricultural development, especially agricultural mechanization apart from spraying machines for cashew nut and small irrigation scheme in Lifua …
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Impact of Manure Land Management Practices on Manure Borne Antibiotic Resistant Elements (AREs) in Agroecosystems
… medicine, primarily with livestock rearing. Animal manure land application integrates livestock farming and agroecosystems. This manure contains antibiotic resistant elements (AREs) (resistant bacteria, resistance genes, and veterinary antibiotics) that contribute towards antimicrobial …
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The Occurrence and Fate of Steroid Hormones from Manure Amended Agriculture Fields
… the sexual development of aquatic organisms. Animal manure applications to agricultural fields for nutrient management can be a source of environmental hormones. This dissertation investigates the occurrence of hormones in fields applied with various manures and their adjacent streams, as well …
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A spatial analysis of phosphorus in the Mississippi River Basin
… application, major crop acreage and harvest, animal numbers for manure inputs and human population. Landscape and climate characteristics of tile drainage, soil characteristics, slope and precipitation were also included. Riverine yields of total P (TP), dissolved reactive P (DRP) and …
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Copper adsorption/desorption characteristics on copper amended soils
… soils amended with Cu as either Cu-rich pig manure or CuSO₄ with the same Cu content as that in manure. The study also assessed the capability of Mehlich-3 to estimate deficient and toxic Cu levels in soil. Application of Cu as manure or CuSO₄ did not affect grain yield or grain Cu …
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