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Showing 1 to 20 of 65 for “"Kjeldahl"”.
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The kjeldahl nitrogen process for well waters
Thesis: B.S., Massachusetts Institute of Technology, Department of Chemistry, 1890
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Stormwater-borne pollutant export from turfgrass established on soils amended with composted domestic wastewater sludges
… phosphorus as P, soluble ammonia as N, soluble Kjeldahl nitrogen as N, total Kjeldahl nitrogen as N, nitrite plus nitrate as N, total suspended solids, chemical oxygen demand, cadmium, copper, lead, nickel, zinc, chromium, and iron. Compost was found to improve moisture retention in the soil and …
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The effect of selected organics on breakpoint chlorination
… were varied. The breakpoint curves and total Kjeldahl nitrogen removal efficiencies were determined, and it was demonstrated that each organic has a specific effect on the nature of the breakpoint curve and the nitrogen removal efficiency. It was found that both effects are highly dependent …
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Contaminant removal from impervious pavements and its relationship with raindrop impact energy, cumulative kinetic energy of rainfall events, and rainwater pH
… solids, volatile suspended solids, total Kjeldahl nitrogen, soluble Kjeldahl nitrogen, oxidized nitrogen, ammonia, ortho-phosphate, total phosphorus, soluble phosphorus, total lead and total zinc. Raindrop impact energy, rainfall intensity, rainfall duration, and rainwater pH were factors …
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Nitrogen modeling of potato fields in the Bolivian Andes using GLEAMS
… in central Bolivia for runoff volume, soil total Kjeldahl N concentration, crop production, and crop N uptake; and sensitivity analysis. Validation of model output with observed values was completed both graphically and by determining the root mean square error standard deviation ratio (RSR) and …
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Soil and vegetation recovery on abandoned paved roads in a humid tropical rain forest, Puerto Rico
… soil moisture, soil organic matter, and total Kjeldahl nitrogen reached forest levels within 11 yr of road abandonment despite residual pavement. Road soil pH showed a clear successional trend, and approached the more acidic forest soils within 60 yr. Pool sizes were similar to the forest by …
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Removal Of Refractory Tkn From An Effluent Wastewater Using Sodium Ferrate
… completely from domestic wastewater. TKN (Total Kjeldahl Nitrogen), ammonia plus organic nitrogen, is one of the forms to measure the levels of nitrogen present in effluent wastewaters. Ferrate, a strong oxidant, was used for the treatment of these nitrogen forms with the objective of producing …
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Organic amendment effects on carbon and nitrogen mineralization in an Appalachian minesoil
… 16.0, and 18.2 g kg⁻¹. Net accumulated total Kjeldahl N after 8 years was 784, 1132, and 679 kg ha⁻¹! for the control, topsoil, and woodchip treatments, respectively, but amended minesoils were not significantly different from the control. Total Kjeldahl N accumulation rates were 103, 149, and …
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Pilot-scale study on anaerobic/aerobic treatment of a textile dye wastewater
… (COD), total phosphorus, sulfide, sulfate, total Kjeldahl nitrogen (TKN), ammonia, nitrate, chloride and oxidation-reduction potential (ORP). Nearly 50% color removal was observed during anaerobic treatment with a 12 hour HRT, with a total system color removal, including subsequent aerobic …
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The Use of a High Energy Feed for the Improvement of Trout Farm Effluents
… main concern were total suspended solids, total Kjeldahl nitrogen (TKN) and total ammonia nitrogen (TAN). The results of these studies showed that the effluents of basins receiving a high energy feed generally contained significantly lower concentrations of TSS, but higher amounts of TKN than …
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Effectiveness of Wastewater Treatment for Selected Contaminants Using Constructed Wetlands in Mediterranean Climates
… microorganisms and nutrients such as total Kjeldahl nitrogen and total phosphorous were variable among the case studies. Overall removal effectiveness was affected by various factors such as the presence of macrophytes, temperature, hydraulic loading rates (HLRs) and hydraulic retention …
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A methodology for the design of wet detention basins for treatment of highway stormwater runoff
… five total and dissolved heavy metals, total Kjeldahl nitrogen, nitrate-nitrite nitrogen, total and dissolved phosphorus, and pH. Orthophosphorus, temperature, and total dissolved solids were analyzed only during the first year. The resulting analysis determined that highway runoff is similar …
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Fluorometric determination of sulfhydrl plus disulfide as an index to heat treatment of half-and-half
… a wider range of heat treatments than semimicro-Kjeldahl measurement of whey protein nitrogen.
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The Impact of Nutrient Loading from Canada Geese (Branta canadensis) on Water Quality, a Mesocosm Approach
… total phosphorus, ammonia, nitrate, total Kjeldahl nitrogen, chlorophyll-a, phycocyanin or turbidity for any of the treatment groups versus the control (no fecal addition). Nitrogen to phosphorus ratios were not affected by the fecal additions. Although there was no significant increase in …
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Sources and yields of nutrient and organic loadings in the Roanoke River Basin above Smith Mountain Lake, Virginia
… carbon, total phosphate, orthophosphate, Total Kjeldahl Nitrogen, nitrate nitrogen, sodium, potassium, calcium, and magnesium. These data were used in conjunction with flow and drainage area data to determine the relative magnitude and daily yields of nutrient and organic yields from various …
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Performance Evaluation of a Low Impact Development Retrofit for Urban Stormwater Treatment
… solids, total phosphorus, total nitrogen, total Kjeldahl nitrogen, ammonia nitrogen, chemical oxygen demand, copper, zinc and alkalinity. EPM analysis did not show significant removals of oxidized nitrogen, total dissolved solids, orthophosphate phosphorus and hardness.
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Developmental changes in nitrogen and protein of tall and dwarf tomato seedlings Lycopersicon esculentum Mill
… the method of Lowry et al. and a modified micro-Kjeldahl direct Nesslerization technique. The tall tomato 'Fireball' differs from the dwarf 'Md. 412-4' in several ways: (1) the tall has more total nitrogen and protein; (2) it exhibits a significant increase in protein during the initial 48-hours …
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Nitrogen values of liquid dairy manure and dry broiler litter as affected by preservation treatment
… and five poultry farms were analyzed for total Kjeldahl, ammonium, and nitrate/nitrite nitrogen within 24 hours of farm sampling, and at the end of seven days. Samples of the fresh manure were analyzed immediately as a control. The four preservation techniques were storage of the samples: at …
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The recovery and behavior of fertilizer nutrients from the anaerobic digestion of poultry manure
… of poultry manure following digestion. Total kjeldahl N (TKN) was completely recovered during digestion, however, NH₄⁺N was 159 and 151% recovered fran pilot scale plug flow and laboratory scale digesters. This indicates that added organic N is mineralized. Recovered N and K were associated …
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Effects of forest harvesting best management practices on surface water quality in the Virginia coastal plain
… total suspended solids (TSS), ammonia, total Kjeldahl nitrogen (TKN), total nitrogen (TN), sediment-bound nitrogen and total phosphorous (TP) concentrations and total flow TSS and TP concentrations. BMP implementation was also effective in minimizing harvesting impacts on stormflow TSS, TKN, …
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