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Добірка наукової літератури з теми "Via-nitrite processes"

Автор: Grafiati

Опубліковано: 11 березня 2023

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Статті в журналах з теми "Via-nitrite processes"

1

Barat, R., J. Serralta, M. V. Ruano, et al. "Biological Nutrient Removal Model No. 2 (BNRM2): a general model for wastewater treatment plants." Water Science and Technology 67, no. 7 (2013): 1481–89. http://dx.doi.org/10.2166/wst.2013.004.

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This paper presents the plant-wide model Biological Nutrient Removal Model No. 2 (BNRM2). Since nitrite was not considered in the BNRM1, and this previous model also failed to accurately simulate the anaerobic digestion because precipitation processes were not considered, an extension of BNRM1 has been developed. This extension comprises all the components and processes required to simulate nitrogen removal via nitrite and the formation of the solids most likely to precipitate in anaerobic digesters. The solids considered in BNRM2 are: struvite, amorphous calcium phosphate, hidroxyapatite, new

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2

Pijuan, M., L. Ye, and Z. Yuan. "Could nitrite/free nitrous acid favour GAOs over PAOs in enhanced biological phosphorus removal systems?" Water Science and Technology 63, no. 2 (2011): 345–51. http://dx.doi.org/10.2166/wst.2011.062.

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Enhanced biological phosphorus removal (EBPR) normally occurs together with nitrogen removal in wastewater treatment plants (WWTPs). In recent years, efforts have been devoted to remove nitrogen via the nitrite pathway (oxidation of ammonia to nitrite and reduction of nitrite to nitrogen gas without going through nitrate), reducing the requirement for carbon and oxygen in the plant. However nitrite and free nitrous acid (FNA), the protonated species of nitrite, have been shown to cause EBPR deterioration under certain concentrations. This study provides a direct comparison between the differen

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3

Pambrun, V., E. Paul, and M. Spérandio. "Treatment of nitrogen and phosphorus in highly concentrated effluent in SBR and SBBR processes." Water Science and Technology 50, no. 6 (2004): 269–76. http://dx.doi.org/10.2166/wst.2004.0385.

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Various sludge treatment processes produced supernatant with high ammonia concentration from 500 to 2,000 mgN/L and generally high phosphate concentration. Conversion of ammonia into nitrite via partial nitrification has proven to be an economic way, reducing oxygen and external COD requirements during the nitrification/denitrification process. Two processes with biomass retention are studied simultaneously: the sequencing batch reactor (SBR) and the sequencing batch biofilm reactor (SBBR). At a temperature of 30°C, the inhibition of nitrite-oxidizing bacteria due to high ammonia concentration

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4

Guieysse, B., M. Plouviez, M. Coilhac, and L. Cazali. "Nitrous oxide (N<sub>2</sub>O) production in axenic <i>Chlorella vulgaris</i> cultures: evidence, putative pathways, and potential environmental impacts." Biogeosciences Discussions 10, no. 6 (2013): 9739–63. http://dx.doi.org/10.5194/bgd-10-9739-2013.

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Abstract. Using antibiotic assays and genomic analysis, this study demonstrates nitrous oxide (N2O) is generated from axenic C. vulgaris cultures. In batch assays, this production is magnified under conditions favoring intracellular nitrite accumulation, but repressed when nitrate reductase (NR) activity is inhibited. These observations suggest N2O formation in C. vulgaris might proceed via NR-mediated nitrite reduction into nitric oxide (NO) acting as N2O precursor via a pathway similar to N2O formation in bacterial denitrifiers, although NO reduction to N2O under oxia remains unproven in pla

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5

Bristow, Laura A., Tage Dalsgaard, Laura Tiano, et al. "Ammonium and nitrite oxidation at nanomolar oxygen concentrations in oxygen minimum zone waters." Proceedings of the National Academy of Sciences 113, no. 38 (2016): 10601–6. http://dx.doi.org/10.1073/pnas.1600359113.

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A major percentage of fixed nitrogen (N) loss in the oceans occurs within nitrite-rich oxygen minimum zones (OMZs) via denitrification and anammox. It remains unclear to what extent ammonium and nitrite oxidation co-occur, either supplying or competing for substrates involved in nitrogen loss in the OMZ core. Assessment of the oxygen (O2) sensitivity of these processes down to the O2concentrations present in the OMZ core (<10 nmol⋅L−1) is therefore essential for understanding and modeling nitrogen loss in OMZs. We determined rates of ammonium and nitrite oxidation in the seasonal OMZ off Co

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6

Caballero, Antonio, Abraham Esteve-Núñez, Gerben J. Zylstra, and Juan L. Ramos. "Assimilation of Nitrogen from Nitrite and Trinitrotoluene in Pseudomonas putida JLR11." Journal of Bacteriology 187, no. 1 (2005): 396–99. http://dx.doi.org/10.1128/jb.187.1.396-399.2005.

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ABSTRACT Pseudomonas putida JLR11 releases nitrogen from the 2,4,6-trinitrotoluene (TNT) ring as nitrite or ammonium. These processes can occur simultaneously, as shown by the observation that a nasB mutant impaired in the reduction of nitrite to ammonium grew at a slower rate than the parental strain. Nitrogen from TNT is assimilated via the glutamine syntethase-glutamate synthase (GS-GOGAT) pathway, as evidenced by the inability of GOGAT mutants to use TNT. This pathway is also used to assimilate ammonium from reduced nitrate and nitrite. Three mutants that had insertions in ntrC, nasT, and

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7

Guieysse, B., M. Plouviez, M. Coilhac, and L. Cazali. "Nitrous Oxide (N<sub>2</sub>O) production in axenic <i>Chlorella vulgaris</i> microalgae cultures: evidence, putative pathways, and potential environmental impacts." Biogeosciences 10, no. 10 (2013): 6737–46. http://dx.doi.org/10.5194/bg-10-6737-2013.

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Abstract. Using antibiotic assays and genomic analysis, this study demonstrates nitrous oxide (N2O) is generated from axenic Chlorella vulgaris cultures. In batch assays, this production is magnified under conditions favouring intracellular nitrite accumulation, but repressed when nitrate reductase (NR) activity is inhibited. These observations suggest N2O formation in C. vulgaris might proceed via NR-mediated nitrite reduction into nitric oxide (NO) acting as N2O precursor via a pathway similar to N2O formation in bacterial denitrifiers, although NO reduction to N2O under oxia remains unprove

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8

Mascarenhas, Romila, Zhu Li, Carmen Gherasim, Markus Ruetz, and Ruma Banerjee. "The human B12 trafficking protein CblC processes nitrocobalamin." Journal of Biological Chemistry 295, no. 28 (2020): 9630–40. http://dx.doi.org/10.1074/jbc.ra120.014094.

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In humans, cobalamin or vitamin B12 is delivered to two target enzymes via a complex intracellular trafficking pathway comprising transporters and chaperones. CblC (or MMACHC) is a processing chaperone that catalyzes an early step in this trafficking pathway. CblC removes the upper axial ligand of cobalamin derivatives, forming an intermediate in the pathway that is subsequently converted to the active cofactor derivatives. Mutations in the cblC gene lead to methylmalonic aciduria and homocystinuria. Here, we report that nitrosylcobalamin (NOCbl), which was developed as an antiproliferative re

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9

Jacob, Juliane, Tina Sanders, and Kirstin Dähnke. "Nitrite consumption and associated isotope changes during a river flood event." Biogeosciences 13, no. 19 (2016): 5649–59. http://dx.doi.org/10.5194/bg-13-5649-2016.

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Abstract. In oceans, estuaries, and rivers, nitrification is an important nitrate source, and stable isotopes of nitrate are often used to investigate recycling processes (e.g. remineralisation, nitrification) in the water column. Nitrification is a two-step process, where ammonia is oxidised via nitrite to nitrate. Nitrite usually does not accumulate in natural environments, which makes it difficult to study the single isotope effect of ammonia oxidation or nitrite oxidation in natural systems. However, during an exceptional flood in the Elbe River in June 2013, we found a unique co-occurrenc

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10

Alvarino, Teresa, Evina Katsou, Simos Malamis, Sonia Suarez, Francisco Omil, and Francesco Fatone. "Inhibition of biomass activity in the via nitrite nitrogen removal processes by veterinary pharmaceuticals." Bioresource Technology 152 (January 2014): 477–83. http://dx.doi.org/10.1016/j.biortech.2013.10.107.

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