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 13 of 13 for “"nitrogen and phosphorus removal"”.
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Biological nitrogen and phosphorus removal on large plants.
Full scale implementation of biological excess phosphorus removal by means of the activated sludge process commenced in South Africa at the Johannesburg Alexandra Plant in 1974. Originally the plant was designed to operate in the nitrifying extended aeration mode; but by switching off some surface …
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Denitrification kinetics in biological nitrogen and phosphorus removal activated sludge systems
… order to size the anoxic reactors in nutrient (N and P) removal activated sludge plants, it is essential to know the denitrification kinetics that are operative in such systems. To date, denitrification kinetics have been accurately defined only for systems that remove N alone; little research has …
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Mathematical Modeling and Evaluation of Ifas Wastewater Treatment Processes for Biological Nitrogen and Phosphorus Removal
… become popular for enhanced nitrification and denitrification in aerobic zones because it is an alternative to increasing the volume of treatment plant units to accomplish year round nitrification and nitrogen removal. Biomass is retained on the fixed-film media and remains in the aerobic …
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A STUDY OF NITROGEN AND PHOSPHORUS REMOVAL FROM MUNICIPAL SEWAGE IN SBR WITH THE APPLICATION OF THE TAGUCHI METHODS IN EXPERIMENTAL DESIGN
… batch reactors (SBR), the suspended growth SBR and the attached suspended growth SBR, were used to study nitrogen and phosphorus removal from municipal sewage. The influence of three controlling factors, namely Batch Loading Rate, Feed Pattern (initial feed or step feed), and Mixing/Aeration …
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Alternative Waste Treatment System for Poultry Processing Plants
… for turkey processing plants to recover energy and reduce N and P to allowable discharge levels. The objective included: 1. Determine the quantity and quality of biogas produced from the turkey processing wastewater (TPW) and COD reduction efficiency. 2. Design a waste treatment system and …
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Effects of temperature and mean cell residence time on the performance of high-rate biological nutrient removal processes
The effects of temperature and mean cell residence time (MCRT) on processes involved in biological nitrogen and phosphorus removal were investigated by operating pilot-scale continuous-flow reactors over a range of temperatures and MCRITs. Two systems were operated as high-rate University of Cape …
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Comparative study of sludge dewatering and thickening characteristics for biological phosphorus removal process and conventional activated sludge process sludges
… every new process in order to design the sludge handling equipment properly. In this study, sludge from the Virginia Initiative Plant, a pilot scale unit employing the UCT biological nitrogen and phosphorus removal process, operating at Lambert's Point Primary Treatment Plant in Norfolk, Virginia, …
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Development of universal stoichiometric coefficients for modeling microalgal cultivation systems
… are approaching the limit of technology for nitrogen and phosphorus removal. Algae treatment technologies have the ability to remove additional nitrogen and phosphorus, thereby lowering the effluent nutrient discharge level at WRRFs. A critical challenge for the adoption of algal …
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Cod removal, nitrification and denitrification kinetics and mathematical modeling of an integrated fixed film activated sludge (IFAS) system
Biological nitrogen and phosphorus removal are being recommended at several wastewater treatment facilities in the U.S. to control eutrophication in water bodies receiving their effluent. In several instances, nitrogen removal is being recommended on a year round basis at plants located in the …
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AN INVESTIGATION OF AQUATIC MACROPHYTE-BASED AQUATIC WASTEWATER TREATMENT SYSTEMS FOR TEMPERATE CLIMATES (ELODEA NUTTALLII, PHOTOSYNTHESIS, NUTRIENT BUDGET, ACTIVE TRANSPORT, NITRIFICATION)
… treatment systems; they can provide secondary and advanced secondary wastewater treatment capabilities for small communities. Their potential application in temperate climates has been ignored. The research presented here was conducted to examine their applicability for use in temperate …
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Nutrient (Ammonium and Phosphate) Removal Using Aerobic Granulation at Pilot scale
… the causes of aerobic granulation inhibition and deterioration in nutrient removal performance of aerobic granular sludge (AGS) reactors at pilot scale. Identifying the underlying phenomena seems necessary to enhance predictability and reliability of this process under diverse circumstances. …
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Using Tall Fescue to Remove Nutrients from Renovated Turkey Processing Wastewater
… a turkey processing plant, was treated in a sand bioreactor system. Reduction of nitrate and phosphorus from wastewater was quantified in the influent and effluent to evaluate the performance of the greenhouse-based hydroponic system. Tall fescue was cultured on media consisting of perforated …
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A Comparison of Wastewater Process Modelling Tools: Case Study of Potsdam WWTW
… The characterisation of the influent wastewater and specific wastewater parameters are critical input parameters to the mathematical model, whether for design, optimisation or to measure the expected performance of a wastewater treatment works (WWTW). A wastewater treatment process is inherently …