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Showing 1 to 20 of 118 for “"nitrogen removal"”.
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Anaerobic / Aerobic Digestion for Enhanced Solids and Nitrogen Removal
… Different operational parameters, such as COD removal, VS destruction, biogas production, Nitrogen removal, odor removal and dewatering properties of the resulting biosolids were studied and the results were compared among different processes. From the study, it was found that An/Aer/An – B …
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Carbon and nitrogen removal in a granular bed baffled reactor
… as anaerobic units are usually designed for the removal of organic matter. In addition, nitrate inhibition to methanogenesis in anaerobic environment could cause further problems during treatment. Therefore, a type of high rate anaerobic system is required which could accommodate nitrogen removal …
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Nitrogen Removal From Dairy Manure Wastewater Using Sequencing Batch Reactors
… and stoichiometric parameters associated with nitrogen removal from the wastewater, as well as to demonstrate experimental and simulated nitrogen removal from the wastewater. The characterization showed that all the wastewaters had carbon to nitrogen ratios large enough for biological nitrogen …
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Nitrogen Removal from Closed Aquaculture System by Bio-electrochemical System
Removal of nitrogen elements in culture water is one of the major concerns in recirculating aquaculture system (RAS). Maintaining a low concentration of nitrogen compounds is essential for a good quality of aquaculture production. Due to fish is very sensitive to the toxic ammonium/ammonia, …
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Microbial contaminant removal and alternative nitrogen removal pathways in denitrifying bioreactors
… and low-cost technology for the effective removal of nitrogen (N) from water by enhancing denitrification (i.e. the bacterial conversion of nitrate [NO3-] to N gas). To date, studies on denitrifying bioreactors have mainly focused on the ability of, and factors influencing, the removal of …
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Kinetics of biological nitrogen removal in a single sludge activated sludge process
The objective of this investigation was to develop experimental set-ups and operational procedures for accurate and reliable evaluation of the kinetic constants and sewage characteristics that influence nitrification and denitrification in the single sludge nitrification-denitrification activated …
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Optimization of intermittent aeration for increased nitrogen removal efficiency and improved settling
Nitrogen, when present in excess, can cause eutrophication in waterways, which may result in hypoxia and the desertion or death of aquatic life. As nitrogen continues to pollute our water, wastewater discharge limits are becoming more stringent with effluent limits based on preserving receiving …
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Wastewater Treatment and Nitrogen Removal in Bench-Scale Photobioreactors Operated with Solids Recycling
… recycling on nitrification, organic carbon removal, and algal-bacterial productivity in bench-scale photobioreactors (PBRs) simulating winter pond conditions in San Luis Obispo, California and a 6-acre raceway system in Delhi, California. Two sets of duplicate photobioreactors operated with …
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Effect of Bioaugmentation Product BiOWiSH® AQUA™ on Nitrogen Removal in Wastewater
<p>Biological nutrient removal (BNR) from wastewater, and specifically nitrogen removal, is a growing concern to wastewater dischargers such as municipalities. Excess nutrients in effluent can create problems such as eutrophication, toxicity to aquatic life, and dissolved oxygen depletion in …
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Assessment and characterization of dissolved organic nitrogen removal in simulated soil aquifer treatment systems
… this research focused on dissolved organic nitrogen (DON) that has yet to be adequately investigated. Effluent DON could be problematic in the receiving waters as a nitrogen source causing eutrophication. It can also act as a precursor for nitrogenous disinfection by-products. In this study, …
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Optimizing high-rate activated sludge: organic substrate for biological nitrogen removal and energy recovery
… being utilized upstream of shortcut biological nitrogen removal (BNR) processes as these BNR processes often require a controlled influent carbon to nitrogen ratio that is lower than required for conventional BNR processes. While there is extensive knowledge on conventional activated sludge …
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Municipal wastewater treatment plants' nitrogen removal response to financial incentives in Maryland and Virginia
… asset to the Mid-Atlantic region. Excess nitrogen and phosphorus discharge, however, has contributed to reduced levels of dissolved oxygen in various locations throughout the Bay. In 2010, the EPA developed a Total Maximum Daily Load (TMDL) for the entire watershed that established …
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Optimization of Biological Nitrogen Removal From Fermented Dairy Manure Using Low Levels of Dissolved Oxygen
A pilot scale nitrogen (N) removal system was constructed and operated for approximately 365 days and was designed to remove inorganic total ammonia nitrogen (TAN) from solids-separated dairy manure. An anaerobic fermenter, upstream of the N removal reactor, produced volatile fatty acids (VFAs), to …
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Breakpoint Chlorination as an Alternate means for Ammoia-Nitrogen removal at a Water Reclamation Plant
… treatment processes are currently available for nitrogen removal or ammonia conversion to nitrate. Those that are economically feasible rely mostly on microbiological processes, which are only effective when the microorganisms remain in a healthy state. If a biological process upset was to occur, …
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Nitrification and denitrification: biological nitrogen removal and sludge generation at the York River treatment plant
Data from Hampton Roads Sanitation District was used to calculate nitrification and denitrification rates for the A²/O mode (1987) and the VIP mode (1988) of operation. Nitrification and denitrification rates compared to literature values for similar sludge ages. The mean VIP nitrification rate was …
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Effects of Integrated Fixed Film Activated Sludge on nitrogen removal in biological nutrient removal systems
… in a bench scale biological nutrient removal (BNR) process configured as a Virginia Initiative Project (VIP) process. The IFAS systems consisted of a sponge - like biomass support system (Captor) operated in the aerobic zone of two independent treatment trains, and a fibrous biomass …
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Study of the hydrodenitrification of 2,6 - lutidine (a preliminary study of nitrogen removal from shale oil), A
Includes bibliographical references (pages 92-98).
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