The enhanced phosphorus and nitrogen removal were mostly due to additional VFA in the fermented food liquor and the accumulation of granular substances (polyhydroxyalkanoates) during anaerobic phase. Both the accumulated VFA and polyhydroxyalkanoate granules are considered to be the major sources of energy for …Web
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In terms of total nitrogen removal, most of the nitrate was converted to ammonia-nitrogen in the sponge iron system and only 2.2% of the total nitrogen was …Web
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Tang et al. 2020). Nitrogen removal is a process of oxidiz-ing and reducing nitrogen to gain and lose electrons (Feng et al. 2017; Zhang et al. 2022a). Therefore, to enhance …Web
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This paper presents an overview on nitrogen removal from wastewater using different types of systems including microalgae solo and microalgae–bacteria consortia systems. The parameters that affect system performance, as well as well as biomass harvesting methods are also discussed. 1. Introduction.Web
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This review article discusses the latest developments for nitrogen removal through BES-enhanced denitrification and elucidates multiple coupled BES-based …Web
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In conclusion, the implementation of the hydrophilic porous biological carrier-based granular sludge (R2) led to enhanced nitrogen removal efficiency and stability in the anammox process when compared to the self-immobilized granular sludge (R1). 3.2. Characteristics of granular sludge in PD/A system3.2.1. Morphology of granular sludgeWeb
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This study indicated that TF CW-MFC significantly enhanced the nitrogen removal in low C/N ratio wastewater and reduced methane emissions. The non-energy consumption aerobic/anaerobic alternate environment created by siphoning water was conducive to the removal of COD and aromatic protein substances in the water. …Web
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Enhanced nitrogen removal driven by S/Fe2+ cycle in a novel hybrid constructed wetland 1. Introduction. With the gradual development of China's rural …Web
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Background Simultaneous nitrogen, phosphorous and COD removal in a pilot-scale enhanced Sequencing Batch Reactor (eSBR) was investigated. Methods The reactor consisted of a pre-anoxic zone and internal recycle and was fed with synthetic wastewater. The study was performed by operating the reactor in 6-hour cycles in three …Web
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Reconfiguration of microbial community was observed during the trial, and the abundances of nitrifying bacteria, denitrifying bacteria and refractory organic degrading bacteria were increased, indicating that AOA-SBFASR might has great potentials for enhanced nitrogen removal and refractory organics conversion and utilization.Web
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Nitrogen removal enhanced by its migration and transformation in a three-chamber microbial electrolysis cell 1. Introduction. Nitrogen (N) is one of the most …Web
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Machat studied the effect of C/N on the biological nitrogen removal of an integrated fixed membrane-activated sludge reactor for nearly half a year. The results showed that when the C/N was ten, the nitrogen removal efficiency was optimum, and the average removal of NH 4 + and total nitrogen were 96.54% and 86.1%, respectively. …Web
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Biomass, pollutant removal efficiency, and extracellular polymer were tested, and the effect of nitrogen and phosphorus removal, enzyme activity, and microbial …Web
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The mechanism for enhanced nitrogen removal in biofilm could be proposed. Due to the slower growth rates and higher half-saturation constants for oxygen …Web
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In essence, BNR is comprised of two processes: biological nitrogen removal and enhanced biological phosphorus removal (EBPR) [Citation 1]. Nitrogen compounds are among the most important pollutants in wastewater because of their role in eutrophication, their effect on the oxygen content of receiving waters, and their toxicity to aquatic ...Web
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The objectives of this study are to investigate the availability of AOA-SBFASR process for nitrogen removal; explore the major species of microorganisms responsible …Web
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In this study, a three-chamber microbial electrolysis cell (MEC) was established for the simultaneous migration, transformation and removal of NH 4 +-N, NO 2 −-N, and NO 3 −-N under different applied voltages.The results showed that higher applied voltages accelerated the migration rate of NH 4 +-N while had little effect on NO 2 −-N and NO 3 − …Web
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During long-term operation, nitrogen removal efficiency (NRE) was improved from 72.2% (21.5 °C→14.9 °C) to 77.2% (stable at 13.9 °C) with influent and effluent total inorganic nitrogen of 44.6 and 10.1 mg N/L. Better low temperature tolerance of nitrate reduction than nitrite reduction enhanced denitratation and increased nitrite ...Web
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Biological Nutrient Removal Processes and Costs. Nitrogen and phosphorus are the primary causes of cultural eutrophication (i.e., nutrient enrichment due to human activities) in surface waters. The most recognizable manifestations of this eutrophication are algal blooms that occur during the summer. Chronic symptoms of over-enrichment include ...Web
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Bacillus velezensis M3-1 strain isolated from the sediment of Myriophyllum aquatium constructed wetlands was found to efficiently convert NO 3 −-N to NO 2 −-N, and the requirements for carbon source addition were not very rigorous.This work demonstrates, for the first time, the feasibility of using the synergy of anammox and Bacillus velezensis …Web
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DOI: 10.1016/j.jwpe.2023.103683 Corpus ID: 257851107; Nitrogen removal enhanced by its migration and transformation in a three-chamber microbial electrolysis cell @article{Yang2023NitrogenRE, title={Nitrogen removal enhanced by its migration and transformation in a three-chamber microbial electrolysis cell}, author={Xiao-Li Yang and …Web
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Metagenomics illuminated the mechanism of enhanced nitrogen removal and vivianite recovery induced by zero-valent iron in partial-denitrification/anammox process. Bioresource Technology 2022, 356, 127317.Web
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The removal rates are generally satisfactory in terms of COD, BOD 5, TP and SS removal; while nitrogen removal is deficient in most of the present operating SWIS due to the different requirements for the presence of oxygen for nitrification and denitrification processes. To study the enhanced nitrogen removal technologies, two …Web
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A multistage mesocosm vertical flow constructed wetland system was designed to treat synthetic domestic wastewater with a high nitrogen (N) load. The study aim was to determine the impact of design and operational variables on N removal efficiency in such systems. A tidal flow operational strategy enhanced aeration and was …Web
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Enhanced nitrogen removal performance of microorganisms to low C/N ratio black-odorous water by coupling with iron-carbon micro-electrolysis. 2023, Journal of Environmental Chemical Engineering. Show abstract. Black-odorous water was caused by urbanization, industrial sewage and domestic sewage. Black-odorous water with low …Web
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In this study, a novel hybrid constructed wetland was used to realize the enhanced nitrogen removal of low C/N sewage, and the mechanism of enhanced nitrogen removal was further discussed from the aspects of water quality change along the flow direction, plant growth response and microbial community structure. The main …Web
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Nitrogen Removal and Fate of Nitrogen in Residual Waste Streams A dissertation submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy in Civil and Environmental Engineering by Tayebeh Goli Dr. Eric Marchand/ Dissertation Advisor Dr. Krishna Pagilla/ Dissertation Co-Advisor August 2023Web
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In this study, this enhanced the nitrogen removal effectiveness of anammox. Denitrification is another pathway for nitrogen removal in the SAD coupling process and is carried out by denitrifying bacteria [13]. Fig. 7 c shows …Web
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amount of nitrogen removed (figure 1) is dependent upon process design and operation. Processes that remove 25 to 50 percent of the total nitrogen include aerobic biological systems and media filters, especially recirculating filters (Technol-ogy Fact Sheet 11). Enhanced nitrogen removal systems can be categorized by their mode of removal.Web
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Fig. 1 The nitrogen removal enhanced mechanism of denitrification for biochar carrier biofilms. The increased nitrogen removal gene abundance and expression of denitrifiers are denoted in italics. FBRs. The FBR is an attached growth system where the support is fluidized at high recirculation flow rates. Hollow fibers in the FBR usually operate ...Web
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Enhanced nitrate-nitrogen removal by modified attapulgite-supported nanoscale zero-valent iron treating simulated groundwater. Journal of environmental management 213, 151–158 (2018).Web
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