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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 77 for “"Ammonia nitrogen."”.
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The effect of selected organics on breakpoint chlorination
… dextrose, phenol, and phenylalanine. The initial ammonia nitrogen and organic compound concentrations 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 …
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The link between Permeable Interlocking Concrete Pavement (PICP) design and nutrient removal
… (UCT) for the treatment of various nutrients (ammonia-nitrogen, orthophosphate-phosphorus and nitrate-nitrogen) commonly found in stormwater runoff. Ten experimental cells each housing a different permeable pavement design were constructed in the NEB laboratory at the UCT. Infiltration tests …
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In-situ Ammonia Removal Of Leachate From Bioreactor Landfills
… challenges remain. One such challenge is the ammonia-nitrogen concentration found in the leachate. The concentrations of ammonia-nitrogen tend to increase beyond concentrations found in leachate from conventional landfills because recirculating leachate increases the rate of ammonification and …
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Managing landfill leachate using biological approach
… demand measured via Reactor Digestion method and ammonia nitrogen concentration measured via Nesslerization method. Besides that,the heavy metals content in the leachate sample were measured via Atomic Absorption Spectroscopy. The ammonia nitrogen concentration and chemical oxygen demand in the …
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Nitrification of Landfill Leachate by Biofilm Columns
… leachate recirculation is practiced, leachate ammonia nitrogen concentrations may accumulate to extremely higher levels than during single pass leaching, thereby requiring treatment before final discharge to a receiving system (Onay, 1998). Usually several physical/chemical wastewater treatment …
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Impedance-based moisture content sensor assessment for gas-phase biofilters
… biofilter is capable of mitigating airborne ammonia efficiently. The moisture content (MC) of the biofilter media is important to determine ammonia mitigation and nitrous oxide generation. It is critical to monitor real-time moisture content of the biofilter media for maintaining biofilter …
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Anaerobic Co-digestion of Microalgae with Food Waste and Wastewater Sludge
… sludge does not have a particularly high carbon:nitrogen (C:N) ratio, it readily and stably digests and is available in large quantities at wastewater treatment plants. This research investigated the methane productivity of algae co-digestion with municipal wastewater sludge and food waste in …
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The effect of processing method of broiler litter on pasteurization, nitrogen loss and nitrogen utilization by sheep
… for 30 min. or longer. Moisture and uric acid nitrogen were lowered (P < .01) for dry heat and the PFA processes. Autoclaving and PFA addition followed by dry heating lowered (P < .01) NPN. Ammonia nitrogen was reduced (P < .01) by all pasteurizing treatments except autoclaving for 10 min. A …
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Evaluation of Constructed Wetlands for the Waste Management of a Large Scale Swine Production Unit
… will be the result of testing for the following: ammonia nitrogen, nitrate nitrogen, total phosphorus, total suspended solids, dissolved solids, dissolved oxygen, biological oxygen demand, and Fecal Coliform Bacteria. The wetland was divided into nine connected cells that covered approximately 3.8 …
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A Process-Based Nutrient Model for the Bedded Manure Pack of Confined Beef Systems
… first study evaluated the source of volatilized ammonia nitrogen from beef cattle manure. Isotope ratio mass spectrometry was used to determine the origin of aerial ammonia nitrogen losses (urine or fecal material) from the relative isotopic abundance of nitrogen in the 15N -labeled slurry …
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Volatile fatty acid production during thermophilic aerobic digestion pre-treatment
… this goal, volatile fatty acid production and nitrogen release were examined under two oxygenation states with detention times ranging from 6 to 24 hours at 55$\sp\circ$C. The semi-continuous laboratory scale reactors, with 3 L operating volumes, were fed primary solids obtained from the City …
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The toxicity of ozonated secondary-treated municipal waste effluent to blue-gill sunfish
… small reductions in COD. Increases in pH and ammonia nitrogen concentrations were observed.
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Managing Cattail (Typha latifolia) Growth in Wetland Systems
… Soluble reactive phosphorous (SRP), nitrate-nitrogen (NO3-N), and ammonia-nitrogen (NH3-N) removals were tested at a constructed wetland receiving municipal wastewater effluent. Over all, no significant differences in nutrients occurred between diverse planted and cattail areas. T. latifolia …
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Ammonia uptake by phytoplankton and limnological studies of Mountain Lake, Virginia
… lake is undergoing change. Whereas inorganic nitrogen, orthophosphate, Secchi disc transparency, and primary productivity continue to suggest an oligotrophic condition, important limnological changes are indicated by the greater seasonal hypolimnetic oxygen depletion and extractable …
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Variations in waste load allocations through sensitivity analysis of the QUAL-II water quality model on the South River, Virginia
… water quality model. The reaeration rate, the ammonia nitrogen oxidation rate, and the carbonaceous deoxygenation coefficient were found to be highly sensitive in the model. Only moderate sensitivity was found with the areal flow contribution, the oxidation rate of nitrite nitrogen, and the …
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Removal of Estrogens at Full and Pilot Scale Livestock Manure Treatment Systems
… hour (or hour) of the influent mass. Higher ammonia nitrogen removing reactors had higher E2 and E2-eq removal in %, higher E2 removal in %/aerobic hour, and the same E2-eq removal in %/aerobic hour compared to those with lower ammonia nitrogen removal. Estrogen removal efficiencies (both in …
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An investigation of some key physico-chemical water quality parameters of an Integrated Multi-Trophic Aquaculture (IMTA) system operating recirculation methodology in the Western Cape of South Africa
… different methods were used for the testing of ammonia. On the farm the standard method is the Nesler photometric test (Lovibond photometer), whereas this research was conducted using a calibrated indophenol blue spectrophotometric technique (Modified Grasshoff, 1976). Results showed no …
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The Use of a High Energy Feed for the Improvement of Trout Farm Effluents
… 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 those …
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Effluent characterization of flow-through aquaculture operations in West Virginia
… oxygen demand, total suspended solids, total ammonia nitrogen, nitrite, nitrate, and total phosphorus. Using flow rate and pollutant concentrations, mass loadings were then calculated for each constituent.;Average concentrations and mass loadings of regulated parameters were within acceptable …
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Water Quality Assessment in Cypress Creek Nature Preserve
… (NO2") and nitrate (NO3", NOx collectively), and ammonia nitrogen (NH3). The temperature, dissolved oxygen, NH3 and NOx concentrations changed with the growing season, but pH demonstrated little variability among the sites. The specific conductivity and phosphorus levels were highly variable. …
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