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Showing 1 to 20 of 42 for “"swine manure"”.
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Strategies to improve crop recovery of swine manure nitrogen
Intensive swine operations produce large amounts of manure that must be dealt with responsibly. Liquid swine manure (LSM) collected in storage units is applied to cropland as a nutrient source. Maximizing crop utilization of the nitrogen (N) added in manure is important to achieve economic and …
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Kinetic Parameters in Thermophilic Methane Fermentation of Swine Manure
… of thermophilic digestion of unmedicated swine manure. The experimental design was set up to test the effects of temperature, retention time and feed concentration on these parameters using the modified Contois model. Feed concentrations of 3%, 4%, 5% and 6% VS in influent were tried at …
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Odor Control and Degradation of Swine Manure With Minimum Aeration
Made available in DSpace on 2014-12-09T20:03:10Z (GMT). No. of bitstreams: 1 7105070.pdf: 5275847 bytes, checksum: 428ad3292fdb4897c8070d37f8ddcf6d (MD5) Previous issue date: 1970
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Concentration and extraction of phosphorus from swine manure slurries as struvite
… variations of magnesium demand within the manure slurries. (2) Developing and testing a short-retention-time pilot-scale reactor that: (a) Effectively and reliably reduces DRP in a variety of swine manure slurries; (b) Provides separation and recovery of precipitated struvite for TP …
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Liquid swine manure as a phosphorus source for corn-soybean rotation
… may result in more efficient use of liquid swine manure and in reduced environmental risks. Two different studies were conducted on farmers' fields using liquid swine manure on corn and soybean crops. One study used conventional research plot methodology with objectives to evaluate (a) …
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Hydrothermal Process for Bioenergy Production From Corn Fiber and Swine Manure
… mechanism during hydrothermal conversion of swine manure. For the purpose of mechanism research, a new method was developed first and employed to meet the experimental requirements on materials balance. The swine manure was then converted in a batch reactor at 240-280°C and 10-120 minutes …
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Hydrogen Sulfide Emission and Control Parameters From Stored Liquid Swine Manure
… to reduce H$\sb2$S production from liquid swine manure. Nitrates were quickly depleted in the first two days of manure storage. The presence of nitrate was observed to reduce H$\sb2$S concentration in the manure quite significantly. However, sulfides were not removed completely from the …
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Thermochemical Conversion of Swine Manure to Produce Oil and Reduce Waste
… showed that the thermochemical conversion of swine manure to produce oil is technically feasible. The process could be a promising technology for waste reduction and renewable energy production from organic waste.
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Feasibility of an integrated biogas scrubber for a swine manure digester
… dioxide (CO$\sb2$) from the biogas produced by a swine manure anaerobic digester. This innovative scrubbing system was included in the original design of an existing full-scale digester, but had never been tested. The principle of operation was that ammonia (NH$\sb3$) gas would be desorbed from …
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Hydrothermal Process of Swine Manure to Oil Using a Continuous Reactor System
Hydrothermal processing of swine manure is a novel technology that has shown very promising results in treating waste and producing oil. Oil yields of up to 70% were achieved in batch experiments. Since a continuous-mode process is more applicable for scale-up operations, a continuous hydrothermal …
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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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Long-term effects of copper rich swine manure application on continuous corn production
… L.) response to high Cu levels from Cu rich swine manure and CuS0₄ applications. The field research was conducted on soils with diverse properties, i.e., on a Bertie fine sandy loam (Aquic Hapludults), a Guernsey silt loam (Aquic Hapludalfs), and a Starr-Dyke clay loam (Fluventic …
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Kinetic Modeling of Mesophilic Digestion of Swine Manure Containing an Antibiotic Inhibitor (Methane, Biogas)
… design and operation of mesophilic digestion of swine manure containing the antibiotic chlortetracycline (CTC). The experimental design was set up to determine the effects retention time (RT) and antibiotic concentration had on the fermentation process. Also, addition of the pure form of the …
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Availability and distribution of copper in soils following eight annual applications of CuSO₄ or Cu-enriched swine manure
… Cu applications, as either CuSO₄ or Cu-enriched swine manure, at high application rates on corn (Zea mays L.) production. The studies were conducted on Bertie fine sandy loam (Aquic Hapludult), Guernsey silt loam (Aquic Hapludalf), and Starr clay loam (Fluventic Dystrochrept)-Dyke clay (Typic …
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Fate and transport of antibiotic resistant bacteria and resistance genes in artificially drained agricultural fields receiving swine manure application
<p>The growing numbers of swine receiving antimicrobial additives in feed at sub-therapeutic levels as a prophylactic and growth promoter has led to increasing concerns regarding levels of antibiotics and antibiotic resistant bacteria in their excrement. Application of swine manure to agricultural …
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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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Degradation of swine manure and a computer model for predicting the desorption rate of ammonia from an under-floor pit
Manure degradation and ammonia desorption rates from under-floor pits in swine buildings were investigated in this research. Manure degradation was experimentally determined under simulated pit operational conditions (1.8% and 3.3% initial manure TS, 20$\sp\circ$C and 30$\sp\circ$C manure …
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Development of a 16S rRNA gene sequence as a biomarker specific to the gastrointestinal tract and feces of swine based on suppressive subtractive hybridization
… environmental issues and human health risks. Swine are a major contributor of fecal inputs to environmental waters due to their importance in American agriculture. Water quality currently is regulated using fecal coliforms, which have natural reservoirs in the environment and may not correlate …
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Evaluation of Macrolide-Lincosamide-Streptogramin B Antimicrobial Resistance at Swine Farms
… B (MLSB) antimicrobial resistance at swine farms were quantified. A variation of fluorescence in situ hybridization (FISH) was developed to detect the methylation of a specific adenine residue (A2058 in Escherichia coli) in the 23S rRNA responsible for MLSB resistance. A robust and …
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