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Showing 1 to 20 of 48 for “"TKN"”.
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Removal Of Refractory Tkn From An Effluent Wastewater Using Sodium Ferrate
… not removed 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 …
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Biological Treatment of a Synthetic Dye Water and an Industrial Textile Wastewater Containing Azo Dye Compounds
… reductions in the total kjehdal nitrogen (TKN) and total organic carbon (TOC) in the wastewater. Anaerobic and aerobic treatment systems were both effective in reducing the wastewater color; however, anaerobic treatment generally produced the greatest color removal. Anaerobic/aerobic …
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Evaluation of the subsurface vegetated bed form of constructed wetlands for domestic wastewater treatment
… 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 (30-61%); TKN (33-52%); PO₄³⁻-P (7-28%); fecal coliforms (FC) …
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Nitrogen transport and dynamics in grass filter strips
… that the runoff, TSS, NO₃⁻-N, NH₄⁺-N, and TKN yields and concentrations from the 8.5 m VFSs were significantly less (α = 0.05) than the influent values. The TSS and NH₄⁺-N yields and concentrations and the TKN concentration from the 4.27 m VFSs were significantly less than the influent …
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Biological Treatment of Reclamation of Industrial Wasterwater From Post-Combustion Carbon Capture
… total nitrogen (TN), total Kjeldahl nitrogen (TKN), ammonia, and sulfate. From the first experiment, the following removal efficiency for COD, TN, TKN, ammonia, and sulfate were achieved: 95%, 62%, 88%, > 99%, and 11%, and 96%, 38%, 47%, 89%, > 99%, and 18% for SBR and SANI, respectively at low …
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The Use of a High Energy Feed for the Improvement of Trout Farm Effluents
… 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 those receiving a …
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Characteristics of runoff from three watersheds in Montgomery County, Virginia
… two watersheds. Significant concentrations of TKN and N0₃-N were found in both groundwater drainage and surface runoff from all three watersheds. Steep embankments contributed the largest amount of TKN, N0₃-N, and COD, averaging 0.290, 0.203, and 19.2 lb/acre respectively in surface runoff. …
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Effect of depth and plants on pollutant removal in horizontal subsurface flow constructed wetlands and their application in Ethiopia
… Eliminierungsraten für TSS, BSB5, CSB, TKN, PO43--P und NH4+-N in Bodenfiltern mit 25 cm und 50 cm Bodentiefe nicht signifikant voneinander. Hinsichtlich der volumenbezogenen Raten zeigte sich für TKN eine signifikant höhere Eliminierung in den H25 Becken. Die Bepflanzung wirkte sich …
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Erosion and nutrient loading characteristics of two small agricultural watersheds in Piedmont Virginia
… rates of sediment, nitrate N, ammonium N, TKN, orthophosphate P, and total P on an event basis. Yields from missed storms were estimated from log-log linear least squares regression rating curves. Seasonal and annual totals of loading rates were computed by summing the yields for all …
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Effects of forest harvesting best management practices on surface water quality in the Virginia coastal plain
… 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, sediment-bound …
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Characterization and treatment of wastewater from blue crab (Callinectes sapidus) processing facilities
… BOD₅ = 14,000-29,000 mg/L, TSS = 650-6,200 mg/L, TKN-N = 2,500-4,000 mg/L, NH3-N = 70-160 mg/L and Total Phosphorus= 100-185 mg/L. One process effluent contained chloride concentrations exceeding 100,000 mg/L. Analysis of production and effluent characterization data from two mechanized plants …
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Treatment of Rainbow Trout <i>(Oncorhynchus mykiss)</i> Raceway Effluent Using Baffled Sedimentation and Artificial Substrates and Characterization of Nutrient Leaching Rates from Settled Rainbow Trout (Oncorhynchus mykiss) Sludge
… ortho-phosphate (OP), total Kjeldahl nitrogen (TKN), total ammonia nitrogen (TAN), and total organic carbon (TOC) occurred rapidly during the first 24 h in both stagnant and agitated conditions. The highest 24 h leaching occurred in the agitated tank, and power regression equations accurately …
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Surface and groundwater quality impacts of conservation tillage practices on burley tobacco production systems in Southwest Virginia
… in 33 percent less NH₃, 7.5 percent less TKN, and 39 percent less PO₄³⁻ total mass. The NT treatment yielded 41 percent less NH₃ and 20 percent less TKN total mass loss compared to the CT treatment. The NT treatment had the most NO₃⁻, PO₄³⁻, and TP mass loss below the root zone, however NT …
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A Comparison of Wastewater Process Modelling Tools: Case Study of Potsdam WWTW
… The parameters selected included the influent TKN (TKN/COD ratio), the maximum specific growth rate of nitrifiers (µMax) and readily biodegradable COD (RBCOD), and during the analysis, all other input parameters to the models were kept constant. The influent TKN and RBCOD are specific …
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Pilot-scale study on anaerobic/aerobic treatment of a textile dye wastewater
… 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 treatment, of about 53%.
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Utilization of Captor sponges to maintain nitrification and denitrification in BNR activated sludge at low aerobic MCRTs
… Sanitation Authority Collection System. The TKN of the wastewater was supplemented by the addition of urea to maintain the influent ammonia concentration around 55 mg/L as nitrogen. Sodium acetate was added to maintain the influent COD around 450 mg/L and Sodium bicarbonate was added to …
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Phosphorus runoff potential of different sources of manure applied to fescue pastures in Virginia
… affect edge-of-the-field losses of TP, DRP, or TKN. Soil test P and water-extractable P measured after the fifth and final rainfall simulation did not correlate to P concentrations in runoff. Forage yields and their N and P concentrations were not impacted. Results indicated a decreasing impact …
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Water Quality of East Texas Streams: Forested Versus Pastured Watersheds Receiving Poultry Litter Applications
… samples were analyzed for Ca, K, Mg, Na, 03-N ,TKN, P04-P, TP, TSS, pH, and dissolved oxygen. A rapid bioassessment was conducted to assess aquatic life stream conditions. Half of the 273 stream samples had nitrate-nitrogen concentrations greater than 0.30 mg L-1 high enough to support excessive …
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Liquid and solids management impact on nutrient ratios for in-line wastewater prefermenters
… 7.5 days. At all three operating conditions the TKN/COD ratio increased (64, 46 and 20% respectively), with an average ratio of 0.057 mg N/mg COD in the raw sewage increasing to 0.082 mg N/mg COD in the settled sewage. These ratio changes limit the use and performance of certain biological …
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Development of a continuous, physically-based distributed parameter, nonpoint source model
… and dissolved ammonium; sediment-bound TKN, and sediment-bound and dissolved phosphorus. A linear equilibrium is assumed between dissolved and sediment-bound phases of ammonium and phosphorus. Nutrient loss is assumed to occur only from the upper cm of the soil profile. The model …
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