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 35 for “"Biochemical Oxygen Demand (BOD)"”.
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Analysis of temporal trends in southern Nevada wastewater pond parameters with an emphasis on ammonia removal
… retention time (HRT), alkalinity, pH, chemical oxygen demand (COD), biochemical oxygen demand (BOD), dissolved oxygen (DO), phosphorus, nitrates, and ammonia. Data on each pond and pond system are presented including pond system comparisons; A major focus of this paper is on ammonia-N removal. …
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Aplicação e calibração de um modelo matemático de qualidade de água
… the study of pollutants behavior in water bodies, of suggested models and the study of proposed otimizations methods, became a subject of great interest. Most of water quality models now in use are extensions of two fairly simple equations, proposed by Streeter and Phelps (1925), for …
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Algal and protozoan response to Holocene climate change and anthropogenic impact: a case study from Sluice Pond, MA
… thecae are attributed to low dissolved oxygen (DO) in the basin. The fossil protozoan record supports the interpretation- thecamoebians were unable to colonize the basin until the middle Holocene and only became abundant when the drought-induced lowstand oxygenated the bottom waters. …
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A comparison of selected chemical characteristics in runoff from different land types
… investigated during the study were five-day biochemical oxygen demand (BOD₅), chemical oxygen demand, orthophosphorous, total phosphorous, nitrate, and total organic carbon. The major interest was in BOD₅ concentrations because of the importance of land runoff in stream assimilation modeling. …
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Potencial influência do uso e ocupação do solo na qualidade da água do rio Abiaí-PB.
… of pH, Thermotolerant Coliform, Dissolved Oxygen (DO), Color, Biochemical Oxygen Demand (BOD) and Turbidity. The analysis of the data showed that the river presents changes with regard to physical, chemical and biological parameters. The use map and land cover shows replacement of native …
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Locally derived nonpoint loading estimates for the Boeuf River/Bayou Lafourche watershed
There is currently a great demand for data and models that can be used to quantify nonpoint source pollutant loads from different land-use types. The Louisiana Department of Environmental Quality (LDEQ) is in the process of implementing management programs for impacted water bodies based on the …
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Seasonal Nutrient Dynamics in a Small-Scale Constructed Wetland Treating Primary Effluent with Applications of Effluent Reuse in Biomass Production
… and phosphorus are the nutrients of focus and biochemical oxygen demand (BOD), total suspended solids (TSS) and fecal coliform are the pollutants. Prior work has focused on design concepts, plant effects on nutrient and pollutant treatment, and annualized treatment performance characteristics. …
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Seasonal Nutrient Dynamics in a Small-Scale Constructed Wetland Treating Primary Effluent with Applications of Effluent Reuse in Biomass Production
… and phosphorus are the nutrients of focus and biochemical oxygen demand (BOD), total suspended solids (TSS) and fecal coliform are the pollutants. Prior work has focused on design concepts, plant effects on nutrient and pollutant treatment, and annualized treatment performance characteristics. …
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Evaluation of the performance of five aerated package treatment systems
… drainfields are operating improperly. With the demand for rural and suburban development increasing, a viable alternative to septic systems and drainfields is needed. One proposed alternative is single family package treatment systems. One vital concern is that a majority of these systems …
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Analytical Methods of Testing Solid Waste and Leachate to Determine Landfill Stability and Landfill Biodegradation Enhancement
… between cellulose, lignin, volatile solids, and biochemical methane production (BMP). These parameters can been used to characterize landfill stability. The BMP tests indicate that a saturated waste can produce methane. Cellulose is an indicator of landfill stability. Wastes high in cellulose …
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Relationships Between Land Use, Land-Use Change, and Water-Quality Trends in Virginia
… available at these stations included dissolved oxygen saturation (DO), biochemical oxygen demand (BOD), pH, total residue (TR), non-filterable residue (NFR), nitrate-nitrite nitrogen (NN), total Kjeldahl nitrogen (TKN), total phosphorus (TP), and fecal coliform (FC). A seasonal Kendall analysis …
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Simulation of physical and chemical processes in reservoirs: Two case studies.
… and physical compounds: chlorides, dissolved oxygen (DO), biochemical oxygen demand (BOD), and total suspended solids (TSS); and validation of the results by comparing with observed values during March - May, 1997. The latter is still under project status and the simulation was performed in a …
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Computational fluid dynamics modelling of dissolved oxygen in oxidation ditches.
… factors that affect the hydrodynamics, dissolved oxygen (DO) and aeration performance of a wastewater oxidation ditch. The literature is reviewed on the Computational Fluid Dynamics (CFD) modelling of wastewater aeration tanks. This study develops a CFD model of an aerated oxidation ditch, by …
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Investigation on different vertical aerated rock filter (vertical aerated rock filter) in removing phosphorus from domestic wastewater
Nutrients in the water body encourage the growth of algae which can accelerate eutrophication. Rock filter (RF) has appeared as an alternative technology to remove phosphorus from wastewater. In response to this, the selection of media between steel slag and limestone for pilot scale filter has …
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Two Essays on Resource Economics: A Study of the Statistical Evidence for Global Warming and An Analysis of Overcompliance with Effluent Standards Among Wastewater Treatment Plants
… with a widely- regulated pollutant, biochemical oxygen demand (BOD). The testable hypotheses are: whether jointness in pollution control between nitrogen and BOD can explain overcompliance and whether variation in BOD output can explain BOD overcompliance. These hypotheses are …
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Winter Limnological Conditions in a PRAIRIE Pothole and the Application of Molecular Oxygen
… winter, and reaeration utilizing molecular oxygen was evaluated as a practical method to prevent winterkill. Ice and snow conditions after 20 December, 1977 allowed little light penetration, and phytoplankton numbers (6174/ml to 1668/ml) and chlorophyll concentration (46.6 mg/L to 14.1 mg/L) …
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Evaluation of management practices and remediation techniques for improving water quality in agricultural systems
… to evaluate predictive relationships for biochemical oxygen demand (BOD) in agricultural effluents, and the effectiveness of bauxite residues (red and brown muds) in reducing soluble nutrient/pollutant release from manure-impacted soils. All the selected water quality parameters were …
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Techno-Economic Evaluation of Conventional Activated Sludge and Membrane Bioreactor Systems for Textile Wastewater Treatment in Bangladesh
… Narayanganj. The environmental regulations now demand textile manufacturing facilities to install effluent treatment systems. The research evaluates Conventional Activated Sludge (CAS) and Membrane Bioreactor (MBR) wastewater treatment systems at five operational effluent treatment plants (ETP) …
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Evaluation of the subsurface vegetated bed form of constructed wetlands for domestic wastewater treatment
… removal incresed with detention time for 5-day biochemical oxygen demand (BOD₅), total Kjeldahl nitrogen (TKN), ammonium (NH₄-N), phosphates (PO₄³⁻-P), redox potential (Eh), and total dissolved solids (IDS). The pollutant removal rates, based on 23 data sets, were: BOD₅ (54-70%); NH₄⁺-N …
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Performance of a Wastewater Treatment Pond System with Microfiltration
… performance was analyzed based on removal of biochemical oxygen demand (BOD) and total suspended solids (TSS) and accumulation of sludge within the pond system. Microfiltration performance was analyzed in terms of meeting the TSS discharge requirement and the membrane fouling rate. The power …
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