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 28 for “"NOB"”.
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Mechanistic Understanding of the NOB Suppression by Free Ammonia Inhibition in Continuous Flow Aerobic Granulation Bioreactors
… ammonia (FA) for nitrite oxidizing bacteria (NOB) suppression in CFRs at pH around 7.8. The ammonia oxidizing bacteria (AOB):NOB activity ratio was determined for a series of granule sizes to understand the impact of mass diffusion limitation on the FA inhibition of NOB. When dissolved oxygen …
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Micropollutants biotransformation by two nitrifying communities enriched from biofilm of a nitrification trickling tower
… with AOB, such as nitrite-oxidizing bacteria (NOB) were not taken into consideration. Therefore, the objective of this study is to investigate the contribution of more environmental relevant nitrifiers to micropollutants biotransformation using a nitrifying community enriched from biofilm of a …
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Ammonia-monooxygenase-mediated cometabolic biotransformation and abiotic transformation of micropollutants
… bacteria (AOB), and nitrite-oxidizing bacteria (NOB) that grow dependently on AOB, we investigated the biotransformation capabilities of an NOB pure culture (Nitrobacter sp.), and an AOB (Nitrosomonas europaea)/NOB co-culture for fifteen MPs, whose biotransformation were associated with …
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THE ROLE of THE CIRCADIAN CLOCK IN DISEASE and TISSUE FUNCTION
… that circadian modulation by a small molecule Nobiletin (NOB) was able to mitigate AD pathogenesis. Furthermore, NOB significantly alleviated the strong neuroinflammation and astrogliosis in AD model APP/PS1 mice. NOB also significantly improved glucose utilization and insulin signaling in …
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Evaluation Of Nitrification Kinetics For A 2.0 MGD IFAS Process Demonstration
… bacteria (AOB) and nitrite oxidizing bacteria (NOB) activity also shifted from the fixed film to the suspended phase as water temperatures increased and vice versa as the temperature decreased. The data suggest that AOB activity occurs on the surface of the biofilm carriers, while NOB activity …
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Development of Kinetic Parameterization Methods for Nitrifying Bacteria using Respirometry
… bacteria (AOB) and nitrite oxidizing bacteria (NOB) without the use of selective inhibitors. By eliminating the use of inhibitory substances, representative biomass characteristics were maintained throughout the tests. The developed method, called the declining DO method, consisted of using a …
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Evaluation of Digital PCR (dPCR) for the Quantification of Soil Nitrogen Turnover Bacteria in Wetland Mesocosms in Response to Season, Fertilization, and Plant Species Richness
… bacteria (AOB), nitrite-oxidizing bacteria (NOB), comammox, anammox, and denitrifiers. Principal component analysis (PCA) was used to identify dominant patterns in the microbial community and nitrogen species. Resampling-based analysis of variance (ANOVA) was used to assess statistical …
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Optimization of intermittent aeration for increased nitrogen removal efficiency and improved settling
… goal was to inhibit nitrite-oxidizing bacteria (NOB) so the nitrification process stopped at nitrite. This helps promote an effluent with equal parts ammonia and nitrite, which is amenable to anammox polishing to achieve low effluent nitrogen concentrations. NOB suppression has been successfully …
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Bioaugmentation and Retention of Anammox Granules to a Mainstream Deammonification Bio-Oxidation Pilot with a Post Polishing Anoxic Partial Denitrification/Anammox Moving Bed Biofilm Reactor
… to out-select nitrite oxidizing bacteria (NOB) by maintaining an ammonia residual (>2 mg NH4-N/L), a relatively high dissolved oxygen (DO) (>1.5 mg O2/L) concentration, an aggressive solids retention time (SRT) for NOB washout, and intermittent aeration for transient anoxia. AMX activity …
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Nitrification process in integrated fixed-film activated sludge (IFFAS) system
… bacteria (AOB), nitrite oxidizing bacteria (NOB), and denitrifying bacteria (DEN). This study looked at alternative nitrification processes, including anaerobic ammonia oxidiation (anammox) reactions that may be innately present in an integrated fixed-film activated sludge (IFFAS). Due to the …
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Experimental testing and modeling of partial nitrification at different temperatures
… bacteria (AOB) and nitrite oxidizing bacteria (NOB) activity, with decreasing ammonia conversion ratio (ACR) and increasing nitrite accumulation ratio (NAR). The maximum growth rates of AOB and NOB determined in this study (0.28 and 0.38 d-1 ) were below the median literature values (0.47 and …
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Treatment of High-Strength Nitrogen Wasetewater With a Hollow-Fiber Membrane-Aerated Biofilm Reactor: A Comprehensive Evaluation
… added. Control of nitrite-oxidizing bacteria (NOB) presented a challenge that was addressed by maintaining the J<sub>O₂</sub>/J<sub>NH₄⁺</sub> below the stoichiometric threshold for complete nitrification to nitrate (4.57 g O₂ / g NH₄⁺). The DO-limiting condition resulted in formation of …
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Modeling anti-air warfare with discrete event simulation and analyzing naval convoy operations
… variables, a nearly orthogonal nearly balanced (NOB) Latin hypercube design was used. The effects of these input changes on the outputs were analyzed using partition trees and nominal logistic regression. The primary response variable was the survival of the High Value Unit (HVU) as a binary …
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Mathematical Modeling of Carbon Removal in the A-Stage Activated Sludge System
… goal is to eliminate nitrite oxidizing bacteria (NOB) from the reactor while selecting for ammonia oxidizing bacteria (AOB). The results showed that a low SRT (< 0.25 d) can produce high effluent substrates (SB and CB), and elevated COD:N ratios consistent with NOB out-selection downstream, the …
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CONFLICT AND COASTAL AQUATIC SPORTS: A MANAGEMENT PERSPECTIVE
… of Practice. This NGB role is frustrated because NOB are commercially driven, leading to a high probability that the associated economic drivers and potential internal competition (two NOB claiming responsibility over one CAS) will negatively impact upon the sustainable development of CAS …
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The Investigation of Nitrite Accumulation and Biological Phosphorus Removal in an Intermittently Aerated Process Combining Shortcut Nitrogen Removal and Sidestream Biological Phosphorus Removal
… NO2. The nitrite accumulation was not due to NOB out-selection, confirmed by AOB and NOB maximum activity tests. It was determined that the nitrite accumulation was due to partial denitrification of nitrate to nitrite by bacteria using internally stored carbon, because profiles and activity …
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Evaluation of Nitrification Inhibition Using Bench-Scale Rate Measurements, Profile Sampling, and Process Simulation Modeling
… to ammonia (AOB) and nitrite oxidizing bacteria (NOB), evaluated independently, and to determine the impact on polyphosphate accumulating organism activity (PAO). Because the historical operational experiences and data analysis suggested inhibited AOB and NOB activity, an investigation was …
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Mixed culture : experienced through a center for the mind and body
… and the program, the site, located in between Nob Hill and the historic core of Chinatown in San Francisco, California, acts as another arena to address the mixing between two different neighborhoods.
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Intensification of Biological Nutrient Removal Processes
… resulting in nitrite oxidizing bacteria (NOB) out-selection. TIN removal was affected by both the type and amount of influent COD, with particulate COD (pCOD) having a stronger influence than soluble COD (sCOD). Based on these findings, an innovative approach to achieving energy efficient …
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Medium for exchange : Mission Bay media center/workplace
… a distinct district such as the Sunset or Nob Hill. With integration and unification stated as their prime directives (at the scale of the block as well as the city), planners have laid out a scheme which includes 7,500 dwelling units and more than four million square feet of office and …
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