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 17 of 17 for “"Hydraulic loading rate"”.
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Field evaluation of vadose zone purification and the effects of applied wastewater quality and hydraulic loading rate
Includes bibliographical references (pages 145-147).
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The Influence of Hydraulic Loading Rate on Nitrification Performance in a Two-Stage Biological Aerated Filter Pilot Plant
… one, ammonia oxidation stage two) biological aerated filter was operated for 10 months on-site at a domestic wastewater treatment plant. Over the study, the system was operated at different hydraulic loading rates that resulted in a range of applied organic and ammonia mass loadings. Performance …
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Nitrification of Landfill Leachate by Biofilm Columns
… and the age of the landfill. At landfills operated as bioreactors, where 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 …
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A laboratory study of factors affecting the applicability of direct filtration water treatment
… of flocculation with direct filtration, and the hydraulic loading rate applied to the filter. Results indicated that direct filtration treatment may be an attractive treatment alternative for raw water of influent turbidity less than 5-8 Ntu. Alum appeared to be the coagulant of choice because …
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Thiosulfate oxidation in a fluidized bed
… autotrophic fluidized bed was continuously operated using a synthetic thiosulfate waste. The reactor was maintained at a hydraulic loading rate of 16.1 gpm/ft² and an influent thiosulfate concentration of 100 mg/1. The void space detention time at this loading rate was approximately 0.6 …
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Evaluating the use of manganese-oxidizing bacteria in surface water treatment plants
… to optimize organics removal has not been demonstrated. Laboratory-scale biofilters were operated to evaluate the ability of MOB to accomplish soluble Mn control at a range of pH (6.3--7.3). The biofilters were able to oxidize Mn at a pH as low as 6.3 at greater than 98% removal. Ozonation …
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Development of Soluble Manganese Sorptive Contactors for Enhancing Potable Water Treatment Practices
… via adsorption onto larger media (2.0-6.4mm) at hydraulic loading rates of 16-24 gpm/ft², thus producing less head loss and furthering the development of soluble Mn sorptive contactors to be implemented in water treatment facilities. Research was conducted by executing laboratory- and pilot-scale …
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Investigation on different vertical aerated rock filter (vertical aerated rock filter) in removing phosphorus from domestic wastewater
… encourage the growth of algae which can accelerate eutrophication. Rock filter (RF) has appeared as an alternative technology to remove phosphorus from wastewater. In response to this, the selection of media between steel slag and limestone for pilot scale filter has been investigated by …
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Effect of depth and plants on pollutant removal in horizontal subsurface flow constructed wetlands and their application in Ethiopia
… bei hydraulischen Aufenthaltszeiten (hydraulic resicence time, HRT) von 6 Tagen untersucht. In Arba Minch erfolgten zudem durch Einstellung erhöhter flächenbezogener Belastungsraten (hydraulic loading rate, HLR) Untersuchungen bei HRT von 1,5 Tagen (H25) und 3 Tagen (H50). Während in …
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The use of biofiltration cells to filter contaminated water flowing from a slum settlement in South Africa
… A relatively small portion of water that is generated and discharged from a slum settlement in South Africa, where water-based services are limited and often dysfunctional, is intercepted and diverted through six biofiltration cells. These cells were packed with different types of natural media, …
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A Pilot-scale Evaluation of Soluble Manganese Removal Using Pyrolucite Media in a High-Rate Adsorptive Contactor
… A major part of the current research was to calibrate the proposed model in predicting the soluble Mn removal performance by incorporating a statistical non-linear regression method to estimate a best-fit value for the fitting parameter kr, the rate constant associated with Mn oxidation by free …
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Enhancing hydraulic performance of a multi-stage anaerobic digester for high solids cattle manure
… when being applied to high solids substrate such as dry-lot cattle manure. In Colorado and the rest of the arid west, feedlot practices and dry climate combine to form a waste product that is very high in total solids (TS) content, from 50% up to 90% TS. Since the most common …
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Lagoon effluent treatment using grass filtration bays
The Western Treatment Plant (WTP), operated by Melbourne Water, is identified as a major contributor of nutrient to Port Phillip Bay, especially in winter. To minimise eutrophication and maximise beneficial uses of the receiving waters of the Bay, the Environmental Protection Authority (EPA) of …
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Method development and application for measuring representative & potential denitrification rates during wastewater reclamation in soil treatment units
… solids, pathogens and organic content; mass loading of nitrogen remains a top concern. Previous research focused on quantifying and modeling nitrogen fate in and below soil treatment units has identified the large variability in denitrification rates as a major obstacle. A method for …
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The Effect of Slowly Biodegradable Carbon on the Morphology, Integrity and Performance of Aerobic Granular Sludge
… aerobic granular reactors (AGRs) were operated for two experimental phases in a sequencing batch reactor (SBR) regime. The objective of the first experimental phase was to develop stable, compact and regular aerobic granules that achieve biological nutrient removal (BNR) of both nitrogen …
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Efficiency of soil aquifer treatment in the removal of wastewater contaminants and endocrine disruptors. A study on the removal of triclocarban and estrogens and the effect of chemical oxygen demand and hydraulic loading rates on the reduction of organics and nutrients in the unsaturated and saturated zones of the aquifer.
… of Soil Aquifer Treatment (SAT) under different loading regimes, using wastewater of much higher strength than usually encountered in SAT systems, and also to investigate the removal of the endocrine disruptors triclocarban (TCC), estrone (E1), 17¿-estradiol (E2) and 17¿- ethinylestradiol (EE2). …
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Constructed treatment wetlands: Tools to attenuate diffuse agricultural pollution and enhance the biodiversity of eutrophic peat lake ecosystems
… tools for diffuse agricultural runoff where flow rates are unregulated and pollutant concentrations can be highly variable. Improving our knowledge of the efficacy of CTWs within intensive agricultural landscapes will increase confidence and encourage more widespread implementation of these …