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 “"woodchip"”.
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Biotic and Abiotic Remediation of Acetaminophen with Woodchip and Biochar-amended Woodchip Adsorbents
… biotic transformation and uptake potential of woodchips and biochar-amended woodchips as a potential sorbent strategy for diffuse acetaminophen (ACT) pollution. Batch reactions were created in triplicate, supplied with 5 mM ACT, and analyzed over an eight hr period using ultraviolet …
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Environmental tradeoffs of denitrifying woodchip bioreactors
… quality standards, innovative practices like woodchip tile bioreactors, constructed wetlands, drainage water management systems, and riparian buffer strips for treating agricultural drainage water are continually being developed and implemented across the Midwestern United States. Like …
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Denitrifying woodchip bioreactors for aquaculture manifold design and potential water reuse
… technology. Early studies on denitrifying woodchip bioreactors, a biological nitrate-remediation system, have demonstrated their potential for RAS wastewater treatment. Bioreactors are highly effective at nitrate removal via the process of denitrification but have also demonstrated a …
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Synergistic approach for nutrient loss mitigation and waste management using paired modified bottom ash and woodchip bioreactor treatment system
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2026-12-01
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Range of and relationships between physical and hydraulic properties of commonly available denitrifying bioreactor woodchips
… and particle size are key physical parameters of woodchip media for denitrifying bioreactor design. Current design guidelines can be improved by analyzing more woodchip types and the effects of overburden on woodchip properties. The objectives of this study were to quantify and determine the …
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Denitrification of saline agricultural effluents (brine from groundwater desalination plants and agricultural leachates) in woodchip bioreactors in the SE of Spain
[SPA] El Campo de Cartagena (1316 km2) se localiza en la Región de Murcia (sureste de España) y es una de las principales cuencas dedicadas a la agricultura intensiva de regadío en Europa. A pesar deser un territorio de clima semiárido (temperatura media anual 18 ̊C; precipitación media anual ≈300 …
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Bioreactor-biochar (B2) treatment system: A novel design for efficient water pollution control from agri-drainage
… impacts of drainage, such as denitrifying woodchip bioreactor and phosphate removal structure. The research presented in this dissertation aims to introduce and design an innovative edge-of-field technology that enables the control of water pollution from tile drainage using woodchip …
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Mechanism of virus removal and nutrient reduction and modification of bio-sand filter
… inches PVC, packed with different proportions of woodchips and sand, and fed with high nitrate concentration (50 mg/L). The proportions of sand and woodchip were different such as 50% of woodchip and sand (filter B), 70% of woodchip and 30% of sand (filter A), and 100% woodchip and 5cm sand layer …
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Organic amendment effects on carbon and nitrogen mineralization in an Appalachian minesoil
… a Jefferson series topsoil, 8 cm of whole-tree woodchips, and an unamended control) were assigned to lysimeters filled with blasted overburden. All lysimeters were planted with a treecompatible ground cover of grasses and legumes and 10 pitch pine x loblolly pine hybrid seedlings (Pinus rigida …
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Impact of Substrate on Nutrient Removal in In-Ditch Bioreactors
… 1) vegetated ditches, 2) vegetated ditches with woodchip bioreactors and 3) vegetated ditches with combination woodchip and biochar bioreactors. Biochar was added in an effort to increase phosphorus removal. Inlet and outlet concentrations of nitrate, ammonium and phosphate were measured for each …
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Challenges and Opportunities for Denitrifying Bioreactors in the Mid-Atlantic
… laboratory studies tested the effect of amending woodchip bioreactors with biochar, an organic carbon pyrolysis product demonstrated to enhance microbial activity. The pilot-scale study provides evidence that either hardwood- of softwood-feedstock biochar may increase N removal in woodchip …
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Biogeochemistry of denitrifying bioreactors to enhance phosphorus removal from agricultural subsurface drainage
… suggesting low-level phosphorus removal by woodchip bioreactors alone. However, it is inevitable that woodchips alone do not abiotically remove phosphorus due to the incompatibility between the surface charge of wood at neutral-to-acidic pH values. In this study, raw pinus radiata, and, …
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Dissolved phosphorus removal in denitrifying bioreactors: field and laboratory studies
Denitrifying woodchip bioreactors are an edge of the field conservation practice designed to remove nitrate (N) from subsurface agricultural drainage water. However, phosphorus (P) removal has been observed in bioreactors across Illinois. Both N and P play an important role in eutrophication and …
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Microbial contaminant removal and alternative nitrogen removal pathways in denitrifying bioreactors
… longitudinal transect of a full-scale operating woodchip bioreactor (~114 m3 in size with 9 sampling wells along the length of the bioreactors) loaded with nitrified septic tank effluent. In addition to significant reduction in NO3- loads, the bioreactor demonstrated consistent and substantial …
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Microbial community analysis for denitrifying biofilters
… occurs both on the surface of the biofilter woodchip media and in biofilter water, and that washing woodchips in buffer solution was able to remove cells for further study. Sample preparation methodology for use with FISH was developed using vortexing of samples with glass beads to aid in …
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Impact of Biochar Amendment, Hydraulic Retention Time, and Influent Concentration on N and P Removal in Horizontal Flow-Through Bioreactors
… potential as an amendment to the traditional woodchip media by conducting nine, five-day trials on twelve laboratory-scale, horizontal flow-through DNBR columns. Three media types were tested: woodchips (W), 90% woodchips and 10% biochar (B10), and 70% woodchips and 30% biochar (B30). …
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Improving performance and expanding application of denitrifying bioreactors for nutrient management in agricultural landscapes
… evaluated the performance of corncob (CC) versus woodchip (WC) bioreactor media across a range of flow conditions and identified key drivers of performance. Results demonstrated that CC consistently outperformed WC, achieving greater nitrate removal efficiency (NRE) and NO3 load removal. Total …
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Examination of synergism in nitrate and orthophosphate removal in bioreactors
… of using this material in conjunction with a woodchip bioreactor known to have a high affinity for nitrate-N removal. The evaluation of materials was conducted via a bench-top batch study and led to the selection of a locally available iron-based scrap steel material, which was able to remove …
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Engineering impurity behavior on the micron-scale in metallurgical-grade silicon production
… pine charcoal sample is higher than in the pine woodchip, suggesting that the charcoalization process introduces unintentional contamination. During reduction, silica evolution is analyzed in parallel to Fe. Fe is predominantly clustered in minerals which influence its oxidation state. Here, Fe …
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Hydraulic evaluation of a denitrifying bioreactor with baffles
Denitrifying ‘woodchip’ bioreactors are an effective conservation practice to reduce nitrate-nitrogen (NO3-N) loss from tile drained agricultural areas. They enhance the naturally occurring denitrification process via the addition of woodchips and maintenance of anoxic conditions. Bioreactors tend …
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