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 25 for “"Ammonia Removal"”.
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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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Aquaponic biofilter system using heliconia sp. for ammonia removal in lake
… Consequently, biofilter aquaponic system for ammoniacal nitrogen removal in lake near non-point sources such as oil palm plantation, factory and educational building were studied. Aquaponic is a system that mutually integrates aquaculture and plant cultivation. Aquaponic biofilter system also …
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Analysis of temporal trends in southern Nevada wastewater pond parameters with an emphasis on ammonia removal
… 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. Individual pond ammonia-N removal performance is compared to published models. A model based solely on …
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Gas-phase biofiltration for livestock building ammonia emission mitigation
… to mitigate certain livestock building ammonia emissions. Biofilters are bio-reactors that can absorb ammonia and then oxidize it into nitrite and nitrate using microorganisms. Woodchips and composts are often used as packing materials thus making it an affordable method. It was …
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Biological and physical treatment of crab processing industry wastewaters
… reactors were studied for effectiveness in the removal of organics from the processor’s wastewaters, and a pilot-scale countercurrent air stripping tower was studied for ammonia removal. Two anaerobic reactors which were fed retort process wastewater at F/M ratios of 0.35 and 0.25 lb COD/1b …
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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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Assessment of a Fixed Media Partial Denitrification/Anammox Process Startup in a Full-Scale Treatment Train
… PdNA process can be used to effectively remove ammonia, nitrate, and nitrite from mainstream municipal waste streams. To retain slow growing anammox, some sort of retention system is needed with media being a common solution to this problem. PdNA has been successfully implemented in mainstream …
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Development of High Efficiency Partial Nitrification as a First Step of Nitrite Shunt Process using Ammonium-Oxidizing Bacteria (AOB)
Shortcut biological nitrogen removal is a non-conventional way of removing nitrogen from wastewater using two processes either nitrite shunt or deammonification. In this research, a complete partial nitrification as a first step of the Nitrite Shunt process has been developed under a high nitrogen …
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Variations in the Oxidative Rates of Nitrosomonas europaea in Coke-Plant Activated Sludge.
… such as those containing high levels of ammonia, has resulted in toxicity to animal and human life and in eutrophication of receiving streams. Stringent government regulations now limit effluent volumes of affected industries. The destructive distillation of coal to produce coke, which is …
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Chemical treatment of anaerobic digester supernatant
… process. This study was concerned with the removal of phosphorus, nitrogenous, and carbonaceous pollutants from the supernatant by use of chemical precipitants. Emphasis was placed on achieving maximum phosphorus removal. Lime, ferric chloride, and alum were the precipitants used in this …
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Membrane Electrochemical Treatment of Landfill Leachate: Processes, Performance and Challenges
… organic oxidation and a high-pH catholyte for ammonia recovery. The MER achieved significantly higher removals of both dissolved organic carbon and UV254nm absorbance than membrane-less electrochemical treatment. The MER was able to remove a large percentage of total nitrogen from the leachate …
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Resource Recovery By Osmotic Bioelectrochemical Systems Towards Sustainable Wastewater Treatment
… inhibit the reverse salt flux. Besides, ammonium removal was successfully demonstrated in OsMFC, making OsMFCs a promising technology for "NEW recovery" (NEW: nutrient, energy and water). For the external configuration of OsBES, an MEC-FO system was developed. The MEC produced an ammonium …
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Removal of nitrogen containing hydrocarbons from wastewater by catalytic and non-catalytic hydrothermal oxidation, in sub- and supercritical conditions
… parameter in all 3 processes that affected DBU removal, TOC removal and ammonia yield. Ru/Al\(_2\)O\(_3\) pellets enhanced the DBU removal, TOC removal and decreased ammonia yield compared to WAO. Complete DBU removal was achieved by catalytic wet air oxidation and supercritical water oxidation. …
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Temperature impact on nitrification and bacterial growth kinetics in acclimating recirculating aquaculture systems biofilters
… assessed short-term temperature effects on total ammonia nitrogen (TAN) utilization rates in a batch laboratory-scale recirculating system. The tank system was designed for experiments on short term steady state and diurnal temperatures. A set of numerical models was developed to simulate observed …
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Treatment of blue crab processing wastewater using Upflow Anaerobic Sludge Blanket (UASB) and air stripping technologies
… the wastewater releases high concentrations of ammonia. In this study, UASB treatment of crab cooker wastewater was evaluated, in terms of COD and TSS reduction, and compared with previous anaerobic treatment efforts. Additionally, UASB and UBF treatment of crab cooker wastewater was …
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Development of Low Energy Aeration System For Enhanced Biological Phosphorus Removal (EBPR)
… the oxygen and chemicals requirement. Phosphorus removal is an important part of wastewater treatment process; Enhanced Biological Phosphorus Removal (EBPR) is one of the main processes responsible for phosphorus removal in wastewater treatment plants. EBPR consist of two major phases: anaerobic …
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Factors Influencing the Nitrification Efficiency of Fluidized Bed Filters With a Plastic Bead Medium
… under conditions of various flow rates and ammonia levels. Bead settled depth and biofilter diameter (12.7, 15.2 and 17.8 cm) were the factors differing among the filters. The experiments were conducted with three replicate recirculating systems. Each system included one of the three …
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Characterizing Kinetic Shifts in Nitrifying, Denitrifying, and Phosphorus Removing Biomass Adapting to Low DO
Low dissolved oxygen (DO) biological nutrient removal (BNR) is becoming a viable option to improve the energy efficiency of BNR. To properly model and design BNR processes for low DO operation, it is critical to fully understand how nitrifier, denitrifier, and polyphosphate accumulating organism …
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