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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 61 for “"biological phosphorus removal"”.
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Substrate induced failure of biological phosphorus removal
The possibility that the biological phosphorus removal mechanism can be inhibited in a continuous flow process by acetic acid passing through into the anoxic and aerobic zones of the reactor was investigated. The objectives of the research were to determine the amenability of a wastewater from the …
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Enhanced Biological Phosphorus Removal for Liquid Dairy Manure
Enhanced biological phosphorus removal (EBPR) has been widely used in municipal wastewater treatment, but no previous studies have examined the application of EBPR to treat dairy manure. This study was conducted to evaluate the (i) performance of pilot-scale EBPR systems treating liquid dairy …
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An Investigation of the Biochemistry of Biological Phosphorus Removal
Although enhanced biological phosphorus removal (EBPR) and complete biological nutrient removal (BNR) systems can be operated successfully by experienced operators, the accuracy of design and strength of the scientific background need to be reinforced to enable accurate modeling and economically …
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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
… at the Hampton Road Sanitation District's biological nutrient removal pilot, located at the Chesapeake-Elizabeth WWTP in Virginia Beach, VA. The pilot is operated in an A/B process with a high-rate, carbon-diverting A-stage, followed by a biological nitrogen removal B-stage containing four …
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Chemical and biological phosphorus removal in the activated sludge process
… set out to establish in what degree the phosphorus removal characteristics of the Modified Activated Sludge Process could be enhanced by the in-plant addition of iron salts. The motivation for the investigation was: 1. Due to the lack of understanding of the exact pre-requisites for …
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The role of metals in enhanced biological phosphorus removal from wastewater
The role of metal cations in enhanced biological phosphorus removal (EBPR) from wastewater by activated sludge was investigated. Potassium and magnesium were simultaneously required for efficient EBPR. Neither potassium nor magnesium could induce enhanced phosphorus uptake on its own. Cations were …
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Investigation of hypothesized anaerobic stabilization mechanisms in biological phosphorus removal systems
… (AnS) is a phenomenon previously observed in biological nutrient removal (BNR) systems that use anaerobic-aerobic sequencing for phosphorus and/or nitrogen removal. AnS manifests itself in the form of less-than-theoretical oxygen requirements for the extent of organics stabilization observed. …
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Development of Low Energy Aeration System For Enhanced Biological Phosphorus Removal (EBPR)
… due to 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: …
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The influence of denitrification in clarifiers on biological phosphorus removal at CCSD plant
Denitrification in biological reactors has been widely studied, whereas, little is known about denitrification occurring in secondary clarifiers. In this study an attempt was made to study denitrification occurring within a secondary clarifier at the Clark County Sanitation District (CCSD) …
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Enhanced Biological Phosphorus Removal from Dairy Manure to Meet Nitrogen:Phosphorus Crop Nutrient Requirements
… of this study was to determine if enhanced biological phosphorus removal (EBPR) is a viable alternative for managing excess manure nutrients on dairy farms. Assessment of EBPR involved the investigation of various aspects of wastewater treatment modeling and design and farm nutrient …
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Influence of nutrients on the biological phosphorus removal process at high acetate concentrations
… was to examine the influence of nutrients on the biological phosphorus removal process at high acetate concentrations. It was an extension of studies conducted by Randall and Chapin (1994), who found that industrial wastewater with high concentrations of acetate were able to inhibit the biological …
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Characteristics and conditioning of anaerobically digested sludge from a biological phosphorus removal plant
… anaerobically digested sludge form a full-scale biological phosphorus removal (BPR) plant (York River Wastewater Treatment Plant, York River, Va.) was conducted to determine the effects of BPR on sludge characteristics and conditioning requirements. Data collected from the plant indicated that …
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Nitrate utilization as the final electron acceptor in a biological phosphorus removal system
… utilization as the final electron acceptor in biological phosphorus removal systems was investigated. The objectives of the study were (1) to determine whether polyphosphate (polyP) microorganisms can use nitrate as the final electron acceptor, and (2) to evaluate and compare polyP accumulation …
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Improving settleability and achieving biological phosphorus removal through the application of sidestream gravimetric selectors
… settleability, while also achieving enhanced biological phosphorus removal without the use of an anaerobic selector. Hydrocyclones receive mixed liquor tangentially and separate light solids from more dense solids through their tapered shape, increasing the velocity of liquid as it moves …
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Investigation of biological phosphorus removal for the treatment of a cellulose acetate manufacturing wastewater
The use of a two Stage Biological Phosphorus Removal (BPR) system to treat a high strength, low pH industrial wastewater was evaluated. A laboratory scale BPR system was continuously operated and fed the industrial wastewater. Effective utilization or removal of carbonaceous material as measured by …
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Kinetics of the release and precipitation of phosphorus in anaerobic digesters sequencing biological phosphorus removal systems
The extent of release and precipitation of phosphorus stored in the poly-phosphate granules of microorganisms present in anaerobic digesters sequencing a biological phosphorus removal (BPR) activated sludge system was examined. The research was conducted at the York River Wastewaster Treatment …
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Optimizing Enhanced Biological Phosphorus Removal at WRRFs: Impact of Low DO Operation and Full-Scale Strategies
… a 53 percent reduction in average effluent total phosphorus (TP) concentrations from 2019 to 2023. This improvement in effluent quality coincided with the elimination of metal salt addition in 2023. Batch tests conducted from 2020 to 2024 indicated higher phosphorus release and aerobic uptake …
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The effects of acetate concentrations on competition between microbial populations in enhanced biological phosphorus removal from wastewater
Enhanced biological phosphorus removal (EBPR) is a popular modification of the activated sludge process, and has been studied and applied for decades. It was hypothesized that the bacteria responsible for EBPR, polyphosphate accumulating organisms (PAOs), have an advantage over their competitors, …
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