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 32 for “"sequencing batch reactors"”.
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Aerobic treatment of CTMP wastewater in sequencing batch reactors
… Volume Indices ranged from 54 to 78 ml/g (for reactors without pH adjustment). Sludge yields in the 24-hour cycle runs were about 0.12 kg MLVSS per kg COD removed, and 0.15-0.18 kg MLVSS per kg BOD₅ removed. This is only about one quarter the sludge yields typical in AS systems, both on a COD …
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Nitrogen Removal From Dairy Manure Wastewater Using Sequencing Batch Reactors
… for the biological nitrogen removal in sequencing batch reactors for the dairy manure wastewater. Results showed that many parameters are similar to those of municipal wastewater treatment systems. This characterization and the derived kinetic and stoichiometric parameters provided some …
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Biodenitrification of a medium strength nitrate industrial wastewater using sequencing batch reactors
Includes bibliographical references (pages 66-68).
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Evaluation of Nitrification Inhibition Using Sequencing Batch Reactors and BioWin Modeling, and the Effect of Aqueous Film Forming Foam on Biological Nutrient Removal
… a history of nitrification upsets, continuous sequencing batch reactors (SBRs) were operated to simulate the full-scale plant. Four reactors were operated in this study. One reactor was fed with raw influent (RWI) from the Nansemond Wastewater Treatment Plant (NP). Another was fed with NP …
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Effect of Feed Rate and Solid Retention Time (SRT) on Effluent Quality and Sludge Characteristics in Activated Sludge Systems Using Sequencing Batch Reactors
A critical element to the successful operation of activated sludge systems is efficient solid liquid separation achieved by bioflocculation. Bioflocculation refers to the process of microbial aggregation to form activated sludge flocs, dependent on the interaction of exocellular polymeric …
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The Kinetics, Biochemical Patterns, and Microbial Ecology in Multiredox (Anoxic, Microaerobic, Aerobic) Activated Sludge Systems Treating BTX Containing Wastewater
… conditions in activated sludge sequencing batch reactors. The studies showed that toluene and m-xylene were denitrified via benzoyl-CoA reductase. Although benzene, o-, and p-xylene were recalcitrant under denitrifying conditions, they were biodegraded under microaerobic (< 0.2 …
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Kinetics of DCOD Consumption by Bacterial Suspensions
… process and such kinetics. Several batch test experiments were performed at different soluble-substratebiomass ratios in order to evaluate its impact on the kinetics and the order of the reaction. Similarly the consumption of dissolved substrate was compared using two different …
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Bacterial Responses to Silver Nanoparticle Treatment: Community Structure, Resistance, and Function.
… and function of wastewater bacteria. </p><p> Sequencing batch reactors were operated to mimic wastewater treatment. They were fed synthetic wastewater and after reaching acclimation, were dosed over time with varying concentrations of both ionic and nanosilver. Cell samples were collected …
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Chemical reduction and oxidation combined with biodegradation for the treatment of a textile dye wastewater
… wastewater were added before transfer into sequencing batch reactors for biological treatment. For the 100 percent textile wastewater stream, the initial, untreated parameters were: 2650 American Dye Manufactures Institute (ADMI) color; 780 mg/L COD; 211 mg/L TOC; and 182 mg/L BOD. The …
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Harnessing <i>Haloferax mediterranei</i> for Bioplastic Production from Organic Waste
… superior material properties. Transitioning from batch to continuous fermentation processes, long-term cultivation in sequencing batch reactors demonstrated stable PHBV production over 450 days, while also exposing substrate and product inhibition phenomena. Mechanistic analyses clarified the role …
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Biological Health Assessment of an Industrial Wastewater Treatment Facility
… on a microbial population were evaluated. Sequencing batch reactors (SBRs) were used to monitor the effects of graphite on mixed liquor suspended solids (MLSS), removal of soluble chemical oxygen demand (sCOD), and specific oxygen uptake rates (sOUR). Graphite appeared to have no adverse …
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Acid-phase and Two-phase Codigestion of FOG in Municipal Wastewater
… using suspended sludge digesters operated as sequencing batch reactors (SBRs). Volatile fatty acid (VFA) production was found to increase with larger FOG loading rates, although this increase was insignificant compared the theoretical VFA production from FOG addition. Long chain fatty acids …
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Sustainable landfill leachate treatment using a willow vegetation filter
… to conventional treatment systems, such as sequencing batch reactors, as they incur lower capital expenses and potentially similar operational costs. This study also identified additional revenue benefits in the region of £94 per hectare for wood chip heat/energy production. The results from …
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Evaluation of gasoline-denatured ethanol as a carbon source for wastewater denitrification
… and MeOH for denitrification in lab-scale, sequencing batch reactors (SBRs). We also focused on the quantification of BTEX present in dEtOH solution and the inhibition potential of these compounds on both nitrification and denitrification. BTEX content in the dEtOH solution had low and …
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Effect of Reactor Feeding Pattern on Performance of an Activated Sludge SBR
… bioflocculation have been analyzed in lab scale sequencing batch reactors (SBR) in order to determine if these changes in effluent water quality and settling and dewatering properties are significant, so they can be considered in future studies or if they can be recommended as crucial when …
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Wastewater treatment alternatives for a vegetable and seafood cannery
… treatability studies were performed using sequencing batch reactors (SBRs) to treat the segregated wastewater from the caustic tomato peeling operation. This isolated 98% of sodium present in the wastewater. Previously, all wastewater was land applied and the high sodium content damaged …
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Evaluating the Source-Effect Relationship of Industrial Toxins in Wastewater Treatment
… that could cause an upset event. Lab-scale sequencing-batch reactors were used to determine the effects of cyanide and pH shock on activated sludge. Three reactors were shocked with increasing weak-acid complexed zinc cyanide or pHs of 5, 9, and 11. The resulting effects were compared to an …
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Alternative primary treatment for energy-positive wastewater treatment: an exploration of pile cloth media filtration
… by secondary activated sludge processes in sequencing batch reactors. Results suggest that implementing PCF treatments can reduce aeration requirements by up to 19%, and the DPCF can generate a primary solids waste stream concentrated to greater than 1% solids. Additionally, the performance …
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Effects of Microbial Community Stress Response and Emerging Contaminants on Wastewater Treatment Plants
… ammonia in the feed, nitrifying activated sludge reactors were operated at various relevant temperatures and the nitrifying microbial community was characterized using activity assays and bio-molecular techniques. We found that Nitrospira spp. were the dominant nitrifying microorganisms, …
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