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Artículos de revistas sobre el tema "Nitrification"

Autor: Grafiati

Publicado: 4 de junio de 2021

Última modificación: 25 de julio de 2025

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1

Taylor, Anne E., Neeraja Vajrala, Andrew T. Giguere, et al. "Use of Aliphaticn-Alkynes To Discriminate Soil Nitrification Activities of Ammonia-Oxidizing Thaumarchaea and Bacteria." Applied and Environmental Microbiology 79, no. 21 (2013): 6544–51. http://dx.doi.org/10.1128/aem.01928-13.

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ABSTRACTAmmonia (NH3)-oxidizing bacteria (AOB) and thaumarchaea (AOA) co-occupy most soils, yet no short-term growth-independent method exists to determine their relative contributions to nitrificationin situ. Microbial monooxygenases differ in their vulnerability to inactivation by aliphaticn-alkynes, and we found that NH3oxidation by the marine thaumarchaeonNitrosopumilus maritimuswas unaffected during a 24-h exposure to ≤20 μM concentrations of 1-alkynes C8and C9. In contrast, NH3oxidation by two AOB (Nitrosomonas europaeaandNitrosospira multiformis) was quickly and irreversibly inactivated

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2

Fiocchi, N., E. Ficara, S. Bonelli, et al. "Automatic set-point titration for monitoring nitrification in SBRs." Water Science and Technology 58, no. 2 (2008): 331–36. http://dx.doi.org/10.2166/wst.2008.387.

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Nitrification is usually the bottleneck of biological nitrogen removal processes. In SBRs systems, it is not often enough to monitor dissolved oxygen, pH and ORP to spot problems which may occur in nitrification processes. Therefore, automated supervision systems should be designed to include the possibility of monitoring the activity of nitrifying populations. Though the applicability of set-point titration for monitoring biological processes has been widely demonstrated in the literature, the possibility of an automated procedure is still at its early stage of industrial development. In this

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3

Yao, Chuang, Heng-Yi Lei, Qiang Yu, et al. "Application of magnetic enhanced bio-effect on nitrification: a comparative study of magnetic and non-magnetic carriers." Water Science and Technology 67, no. 6 (2013): 1280–87. http://dx.doi.org/10.2166/wst.2013.697.

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A novel magnetic carrier with surface magnetic field of 4 mT was developed for studying the magnetic enhanced bio-effect on nitrification. The bio-effect on nitrificaton induced by the magnetic carrier was studied by comparing the performance of sequencing batch biofilm reactors filled with magnetic (MC) and non-magnetic (NMC) carriers. The result showed that the bioreactor with MC had better performance for nitrification than bioreactor with NMC. During the biofilm culturing period, the time required for nitrification formation in biofilm of the MC reactor was 25% less than that for the NMC r

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4

Wang, B., S. He, L. Wang, and L. Shuo. "Simultaneous nitrification and de-nitrification in MBR." Water Science and Technology 52, no. 10-11 (2005): 435–42. http://dx.doi.org/10.2166/wst.2005.0721.

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Experiments have been carried out to get an understanding of the effect of DO, C/N ratio and pH on the performance of a bench scale membrane bioreactor (MBR) in simultaneous nitrification and de-nitrification. It was found that under the conditions of MLSS in the range of 8000–9000mg/L and temperature of water in the MBR of 24°C, influent COD and NH3-N in the range of 523–700mg/L and 17.24–24mg/L respectively, the removals of COD, NH3-N and TN were 98%,99% and 60%; 96.5%,98% and 75%; 96%,95% and 92%; 90%,70% and 60% respectively at DO of 6, 3, 1 and 0.5mg/L. It was also found that the changes

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5

Li, Pengzhang, Yongzhen Peng, Shuying Wang, and Yue Liu. "N2O Emission from Partial Nitrification and Full Nitrification in Domestic Wastewater Treatment Process." Water 14, no. 20 (2022): 3195. http://dx.doi.org/10.3390/w14203195.

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Using actual domestic wastewater as the research object, nitrogen compounds and their combinations were added to different nitrification (partial nitrification, full nitrification) processes to investigate nitrous oxide (N2O) emission and its nitrification mechanisms. The presence of influent NH4+ was the driving force of N2O emission during nitrification. Compared with full nitrification, NO2− in partial nitrification more readily generated N2O by denitrification. Under the proportional gradient of NH4+-N:NO2−-N/NO3−-N, 30:0, 20:10, 10:20, and 0:30, total N2O emissions during partial nitrific

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6

Guo, Changqing, Hongmei Wang, Dianbo Zou, Yue Wang, and Xiaori Han. "A novel amended nitrification inhibitor confers an enhanced suppression role in the nitrification of ammonium in soil." Journal of Soils and Sediments 22, no. 3 (2022): 831–43. http://dx.doi.org/10.1007/s11368-021-03118-3.

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Abstract Purpose Nitrification inhibitor plays an important regulatory role in inhibiting the nitrification of ammonium in soils. However, most of nitrification inhibitors lack the sustainable effects in suppressing the nitrification of ammonium. In this study, a novel DMS nitrification inhibitor was prepared and tested to explore its lasting effect of nitrification suppression in black soil. Materials and methods Both culture experiments and field trial were performed in black soils. Three kinds of nitrification inhibitors (NIs), dicyandiamide (DCD) with low bioactivity, 3,4-dimethylpyrazole

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7

Purwanto, Supriyadi, and Aniek Hindrayani. "Effectiveness of Nitrification Inhibition on Various Species of Brachiaria Grass Rhizosphere." E3S Web of Conferences 31 (2018): 03007. http://dx.doi.org/10.1051/e3sconf/20183103007.

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Nitrification has the potential to decrease the efficiency of nitrogen utilization by plants. The use of nitrifying inhibitory chemicals proved to be effective in controlling nitrification, but also affects beneficial soil microbes. Another attempt to inhibit the more environmentally-friendly nitrification is to use plants that have allelochemical nitrification inhibiting compounds such as the grasses of Brachiaria. The aim of this research is to know the effectivity of B.mutica, B.decumbens, and B.humidicola as inhibitors of nitrification rate in soil. The experiment was carried out by pot ex

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8

Strauss, Eric A., Nicole L. Mitchell, and Gary A. Lamberti. "Factors regulating nitrification in aquatic sediments: effects of organic carbon, nitrogen availability, and pH." Canadian Journal of Fisheries and Aquatic Sciences 59, no. 3 (2002): 554–63. http://dx.doi.org/10.1139/f02-032.

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We investigated the response in nitrification to organic carbon (C) availability, the interactive effects of the C: nitrogen (N) ratio and organic N availability, and differing pH in sediments from several streams in the upper midwestern United States. In addition, we surveyed 36 streams to assess variability in sediment nitrification rates. Labile dissolved organic carbon (DOC) additions of 30 mg C·L1 (as acetate) to stream sediments reduced nitrification rates (P < 0.003), but lower concentration additions or dilution of ambient DOC concentration had no effect on nitrification. C:N and o

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9

Tijhuis, L., M. C. M. van Loosdrecht, and J. J. Heijnen. "Nitrification with Biofilms on Small Suspended Particles in Airlift Reactors." Water Science and Technology 26, no. 9-11 (1992): 2207–11. http://dx.doi.org/10.2166/wst.1992.0698.

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The development of nitrifying biofilms and short and long term influences on the nitrification process were studied in a Biofilm-Airlift-Suspension-reactor. The studied changes are (i) startup of nitrification reactor at different dilution rates, (ii) the effect of temperature on N-oxidation capacity, (iii) the short term effect of N-loading rate on conversion to determine the nitrification overcapacity and (iv) long term effect of N-loading rate on conversion to determine the maximum nitrification capacity in this reactor system. It is shown that the specific nitrification capacity during sta

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10

Zhang, Jie, Jia Liu, Guilong Li, and Meng Wu. "Screening Potential Nitrification Inhibitors through a Structure–Activity Relationship Study—The Case of Cinnamic Acid Derivatives." Sustainability 16, no. 13 (2024): 5791. http://dx.doi.org/10.3390/su16135791.

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Using a nitrification inhibitor to decrease nitrification rates in soil represents a promising strategy to improve nitrogen fertilizer use efficiency. Nonetheless, rapid screening of nitrification inhibitors remains challenging. In this study, we propose a strategy to screen potential nitrification inhibitors through a structure–activity relationship (SAR) study based on a rapid determination of nitrification inhibition. To demonstrate this, the nitrification inhibition potentials of cinnamic acid derivatives against Nitrosomonas europaea growth were evaluated in a liquid culture. The SAR stud

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11

Lorenzen, Jan, Lars Hauer Larsen, Thomas Kjær, and Niels-Peter Revsbech. "Biosensor Determination of the Microscale Distribution of Nitrate, Nitrate Assimilation, Nitrification, and Denitrification in a Diatom-Inhabited Freshwater Sediment." Applied and Environmental Microbiology 64, no. 9 (1998): 3264–69. http://dx.doi.org/10.1128/aem.64.9.3264-3269.1998.

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ABSTRACT High-resolution NO3 − profiles in freshwater sediment covered with benthic diatoms were obtained with a new microscale NO3 − biosensor characterized by absence of interference from chemical species other than NO2 − and N2O. Analysis of the microprofiles obtained indicated no nitrification during darkness, high rates of nitrification and a tight coupling between nitrification and denitrification during illumination, and substantial rates of NO3 − assimilation during illumination. Nitrification during darkness could be induced by purging the bulk water with O2 gas, indicating that the s

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12

Peng, Y. Z., J. F. Gao, S. Y. Wang, and M. H. Sui. "Use of pH as fuzzy control parameter for nitrification under different alkalinity in SBR process." Water Science and Technology 47, no. 11 (2003): 77–84. http://dx.doi.org/10.2166/wst.2003.0589.

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In order to achieve fuzzy control of nitrification in a Sequencing Batch Reactor (SBR) brewery wastewater was used as the substrate. The effect of alkalinity on pH variation during nitrification was systematically studied, at the same time the variations of DO and ORP were investigated. Alkalinity and pH of the wastewater were adjusted by adding sodium bicarbonate at five levels and sodium hydroxide at two levels. Unadjusted wastewater was also studied. According to the results, variation of pH could be divided into rising type and descending type. When bicarbonate alkalinity was deficient or

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13

Schrantz, Karen A., Jonathan G. Pressman, and David G. Wahman. "Simulated distribution nitrification: Nitrification Index evaluation and viable AOB." Journal - American Water Works Association 105, no. 5 (2013): E242—E254. http://dx.doi.org/10.5942/jawwa.2013.105.0046.

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14

Fleming, Kala K., Gregory W. Harrington, and Daniel R. Noguera. "Nitrification potential curves: a new strategy for nitrification prevention." Journal - American Water Works Association 97, no. 8 (2005): 90–99. http://dx.doi.org/10.1002/j.1551-8833.2005.tb07453.x.

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15

How, S. W., S. Y. Lim, P. B. Lim, et al. "Low-dissolved-oxygen nitrification in tropical sewage: an investigation on potential, performance and functional microbial community." Water Science and Technology 77, no. 9 (2018): 2274–83. http://dx.doi.org/10.2166/wst.2018.143.

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Abstract Intensive aeration for nitrification is a major energy consumer in sewage treatment plants (STPs). Low-dissolved-oxygen (low-DO) nitrification has the potential to lower the aeration demand. However, the applicability of low-DO nitrification in the tropical climate is not well-understood. In this study, the potential of low-DO nitrification in tropical setting was first examined using batch kinetic experiments. Subsequently, the performance of low-DO nitrification was investigated in a laboratory-scale sequential batch reactor (SBR) for 42 days using real tropical sewage. The batch ki

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16

Christensson, M., and T. Welander. "Treatment of municipal wastewater in a hybrid process using a new suspended carrier with large surface area." Water Science and Technology 49, no. 11-12 (2004): 207–14. http://dx.doi.org/10.2166/wst.2004.0843.

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An activated sludge/biofilm hybrid process treating municipal wastewater was studied in pilot plant trials. A new type of suspended carrier, with large effective surface area, was employed in the process with the aim of enhancing nitrification. The pilot plant was operated for 1.5 years in five different configurations including pre-denitrification in all five and enhanced biological phosphorus removal in the final two. The wastewater temperature ranged between 11°C and 20°C, and the nominal dissolved oxygen (DO) level was 5-6 mg/L. The nitrification rate obtained on the new carrier within the

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17

Chuchvaga, I. G., and V. V. Volkogon. "NITRIFICATION IN THE ROOT ZONE OF WINTER RYE UNDER THE INFLUENCE OF MINERAL NITROGEN AND PRESOWING SEED BACTERIZATION." Agriciltural microbiology 17 (October 1, 2013): 79–88. http://dx.doi.org/10.35868/1997-3004.17.79-88.

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The paper studies the influence of mineral nitrogen and presowing seeds bakterization on the activity of autotrophic and heterotrophic nitrification in rhizosphere soil of winter rye plants. Increasing doses of mineral nitrogen enhance nitrification activity. Application of microbial preparation Diazobakteryn has a prolonged influence and improves nitrification process, mainly due to the increase of heterotrophic nitrification activity.

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18

Vabolienė, Giedrė, and Algirdas Bronislovas Matuzevičius. "ASSESMENT OF NITRIFICATION AND DENITRIFICATION RATE IN BIOLOGICAL NITROGEN REMOVAL FROM WASTEWATER." JOURNAL OF ENVIRONMENTAL ENGINEERING AND LANDSCAPE MANAGEMENT 15, no. 2 (2007): 77–84. http://dx.doi.org/10.3846/16486897.2007.9636912.

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Biological nitrogen removal from wastewater is based on nitrification and denitrification processes in biological treatment plants with activated sludge. Slowed growth of nitrification bacteria is one of basic problems in biological nitrogen removal from wasterwater. Using biological nitrogen removal technologies at changing nitrification and denitrification rate, it is very important to evaluate properly aeration and reduced aeration duration and to estimate nitrification and denitrification rate. To this purpose an investigation was carried out at Utena Wastewater Treatment Plant. Nitrificat

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19

Tijhuis, L., E. Rekswinkel, M. C. M. van Loosdrecht, and J. J. Heijnen. "Dynamics of population and biofilm structure in the biofilm airlift suspension reactor for carbon and nitrogen removal." Water Science and Technology 29, no. 10-11 (1994): 377–84. http://dx.doi.org/10.2166/wst.1994.0782.

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The dynamics of population and biofilm structure of nitrifying and heterotrophic biomass in biofilms on small suspended particles in an airlift reactor were measured during shifts from purely nitrification to a heterotrophic medium and back to nitrification. Biofilms from a full scale reactor with predominantly heterotrophic activity were used as start material. In the first twenty days of the nitrification period ammonia was oxidized to nitrite. Hereafter the oxidation was mainly to nitrate. A conversion of nearly 5 kgN/(m3 d) was reached in fifty days. Following the change to heterotrophic m

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20

Montagnini, F., B. L. Haines, W. T. Swank, and J. B. Waide. "Nitrification in undisturbed mixed hardwoods and manipulated forests in the southern Appalachian Mountains of North Carolina, U.S.A." Canadian Journal of Forest Research 19, no. 10 (1989): 1226–34. http://dx.doi.org/10.1139/x89-187.

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This paper summarizes data on nitrification at the Coweeta Hydrologic Laboratory, in the southern Appalachian Mountains of North Carolina, U.S.A., focusing on effects of watershed treatment and vegetation type. At Coweeta, as at other United States sites, oak–hickory forests gave the lowest nitrification potentials. Nitrification potentials and nitrifier numbers were lower in oak–hickory forests of undisturbed watersheds than in disturbed watersheds. Nitrification potentials were also low in a white pine plantation, although higher than in other pine forests in the United States. In a regenera

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21

Hanson, Eric J., Philip A. Throop, Sedat Serce, John Ravenscroft, and Eldor A. Paul. "Comparison of Nitrification Rates in Blueberry and Forest Soils." Journal of the American Society for Horticultural Science 127, no. 1 (2002): 136–42. http://dx.doi.org/10.21273/jashs.127.1.136.

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Highbush blueberries (Vaccinium corymbosum L.) are long lived perennial plants that are grown on acidic soils. The goal of this study was to determine how blueberry cultivation might influence the nitrification capacity of acidic soils by comparing the nitrification potential of blueberry soils to adjacent noncultivated forest soils. The net nitrification potential of blueberry and forest soils was compared by treating soils with 15N enriched (NH4)2SO4, and monitoring nitrate (NO3--N) production during a 34-day incubation period in plastic bags at 18 °C. Net nitrification was also compared by

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22

Wu, C. Y., S. Ushiwaka, H. Horii, and K. Yamagiwa. "Boosting nitrification by membrane-attached biofilm." Water Science and Technology 54, no. 9 (2006): 121–28. http://dx.doi.org/10.2166/wst.2006.864.

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Nitrification is a key step for reliable biological nitrogen removal. In order to enhance nitrification in the activated sludge (AS) process, membrane-attached biofilm (MAB) was incorporated in a conventional activated sludge tank. Simultaneous organic carbon removal and nitrification of the MAB incorporated activated sludge (AS+MAB) process was investigated with continuous wastewater treatment. The effluent TOC concentration of AS and the AS+MAB processes were about 6.3 mg/L and 7.9 mg/L, respectively. The TOC removal efficiency of both AS and AS+MAB were above 95% during the wastewater treat

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23

Egenolf, Konrad, Philipp Schad, Ashly Arevalo, et al. "Inter-microbial competition for N and plant NO3− uptake rather than BNI determines soil net nitrification under intensively managed Brachiaria humidicola." Biology and Fertility of Soils 58, no. 3 (2021): 307–19. http://dx.doi.org/10.1007/s00374-021-01606-9.

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AbstractBrachiaria humidicola (syn. Urochloa humidicola) has been acknowledged to control soil nitrification through release of nitrification inhibitors (NI), a phenomenon conceptualized as biological nitrification inhibition (BNI). Liming and N fertilization as features of agricultural intensification may suppress BNI performance, due to a decrease in NI exudation, increased NH3 availability and promotion of ammonia oxidizing bacteria (AOB) over archaea (AOA). A 2-year three-factorial pot trial was conducted to investigate the influence of soil pH and soil microbial background (ratio of archa

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24

Shi, Xiuzhen, Hang-Wei Hu, Christoph Müller, Ji-Zheng He, Deli Chen, and Helen Charlotte Suter. "Effects of the Nitrification Inhibitor 3,4-Dimethylpyrazole Phosphate on Nitrification and Nitrifiers in Two Contrasting Agricultural Soils." Applied and Environmental Microbiology 82, no. 17 (2016): 5236–48. http://dx.doi.org/10.1128/aem.01031-16.

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ABSTRACTThe nitrification inhibitor 3,4-dimethylpyrazole phosphate (DMPP) is a powerful tool that can be used to promote nitrogen (N) use efficiency and reduce N losses from agricultural systems by slowing nitrification. Mounting evidence has confirmed the functional importance of ammonia-oxidizing archaea (AOA) and ammonia-oxidizing bacteria (AOB) in nitrification and N2O production; however, their responses to DMPP amendment and the microbial mechanisms underlying the variable efficiencies of DMPP across different soils remain largely unknown. Here we compared the impacts of DMPP on nitrific

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25

Korotka, I. G., and V. V. Volkogon. "THE FEATURES THE AUTOTROPHIC AND HETEROTROPHIC NITRIFICATION IN THE ROOT ZONE OF WINTER RYE PLANTS UNDER THE USE OF MINERAL FERTILIZERS AND DIAZOBAKTERYN." Agriciltural microbiology 21 (August 6, 2015): 44–51. http://dx.doi.org/10.35868/1997-3004.21.44-51.

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The paper depicts the study of mineral nitrogen and pre-sowing seeds bacteryzation on the development of nitrogen fixing bacteria and the activity of autotrophic and heterotrophic nitrification. It was revealed that nitrification activity in the root zone of winter rye plants rises together with the increase of mineral nitrogen doses. Heterotrophic nitrification plays a significant role in the formation of nitrate pool in the root zone, especially during the early stages of plants organogenesis. Application of the microbial preparation Diazobakteryn had enhanced the activity autotrophic and he

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26

Zhang, Xiumin, and Huayong Zhang. "Modelling Microbial Nitrification and Exploring Nonlinear Mechanism by Dynamical Complexity." Chiang Mai Journal of Science 51, no. 1 (2024): 1–19. http://dx.doi.org/10.12982/cmjs.2024.001.

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Nitrification, a crucial step in nitrogen cycle of ecosystems, is an important issue that attracts many attentions. In this research, the nitrification process is investigated by developing a new dynamical model which couples the kinetics of ammonia oxidation process and nitrite oxidation process. With the application of literature-based parameter values, the dynamical characteristics of nitrification process in aquatic and soil environments are studied. Stable coexistent equilibrium, periodic oscillations, as well as more complex nitrification dynamics, such as quasiperiodic and chaotic oscil

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27

Wu, Yanhua, Wei Wei, Tao Luo, et al. "Distribution of Nitrification and Its Regulating Factors in Coastal Bays with Distinct Trophic Gradients." Water 17, no. 6 (2025): 900. https://doi.org/10.3390/w17060900.

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Nitrification is the key process linking the oxidized and reduced forms of reactive nitrogen, playing an important role in the nitrogen biogeochemical cycle. Quantifying the nitrification rate and evaluating its environmental regulators in different aquatic environments at both regional and global scales has received increasing attention. However, the spatiotemporal variations in nitrification rates in coastal waters, particularly with different trophic states, remain unclear. By using the 15N-labeling technique, here, we quantified the nitrification rates under dark and light conditions in th

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28

Zhang, Song, Zhou, Cao, and Zhou. "Coupling between Nitrification and Denitrification as well as Its Effect on Phosphorus Release in Sediments of Chinese Shallow Lakes." Water 11, no. 9 (2019): 1809. http://dx.doi.org/10.3390/w11091809.

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The coupling of nitrification and denitrification has attracted wide attention since it plays an important role in mitigating eutrophication in aquatic ecosystems. However, the underlying mechanism is largely unknown. In order to study the coupling relationship between nitrification and denitrification, as well as its effect on phosphorus release, nutrient levels, functional gene abundance and potential rates involved in nitrification and denitrification were analyzed in three shallow urban lakes with different nutrient status. Trophic level was found positively related to not only copy number

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29

Albizuri, J., P. Grau, M. Christensson, and L. Larrea. "Validating the Colloid model to optimise the design and operation of both moving-bed biofilm reactor and integrated fixed-film activated sludge systems." Water Science and Technology 69, no. 7 (2014): 1552–57. http://dx.doi.org/10.2166/wst.2014.058.

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The paper presents a systematic study of simulations, using a previously calibrated Colloid model, from which it was found that: (i) for pure moving-bed biofilm reactor (MBBR) processes with tertiary nitrification conditions (no influent chemical oxygen demand (COD)), dissolved oxygen = 5 mg/L and residual NH4-N &gt; 4 mgN/L, a nitrification rate of 1.2 gN/(m2d) was obtained at 10 °C. This rate decreases sharply when residual NH4-N is lower than 2 mgN/L, (ii) for MBBR systems with predenitrification–nitrification zones and COD in the influent (soluble and particulate), the nitrification ra

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30

Fenn, Mark E., Mark A. Poth, Joseph D. Terry, and Timothy J. Blubaugh. "Nitrogen mineralization and nitrification in a mixed-conifer forest in southern California: controlling factors, fluxes, and nitrogen fertilization response at a high and low nitrogen deposition site." Canadian Journal of Forest Research 35, no. 6 (2005): 1464–86. http://dx.doi.org/10.1139/x05-068.

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Net fluxes of nitrogen (N) mineralization and nitrification were measured in situ on a monthly basis for 3 years at a high (HN) and low (LN) N deposition site in the San Bernardino Mountains, California. Mean N mineralization fluxes in the forest floor and top 10 cm of mineral soil were 19.0 and 59.8 kg N·ha–1·year–1 at LN and HN, respectively. Mean net nitrification fluxes were 11.2 and 55.9 kg N·ha–1·year–1 at LN and HN, respectively. Relative nitrification (the percent N mineralized that was nitrified) was generally lower under Pinus ponderosa Dougl. ex P. & C. Laws. (or Pinus jeffreyi

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Tschui, M., M. Boller, W. Gujer, J. Eugster, C. Mäder, and C. Stengel. "Tertiary nitrification in aerated pilot biofilters." Water Science and Technology 29, no. 10-11 (1994): 53–60. http://dx.doi.org/10.2166/wst.1994.0745.

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Three different types of internally aerated pilot scale biofilters were operated as tertiary nitrification systems. Long-term performance of the three aerated biofilters was tested under various operating conditions. The maximum volumetric nitrification rates under non NH4-limiting conditions for the three aerated biofilter systems were investigated. Based on measured temperature dependencies, an exponential relationship was established enabling the prediction of the nitrification rates at desired temperatures. Based on a temperature of 10°C, the results allow a comparison between the surface

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32

Jönsson, Karin, Peter Magnusson, Lars-Erik Jönsson, Bengt Göran Hellström, and Jes la Cour Jansen. "Identifying and fighting inhibition of nitrification at Öresundsverket." Water Science and Technology 33, no. 12 (1996): 29–38. http://dx.doi.org/10.2166/wst.1996.0296.

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After extension of Öresundsverket in Helsingborg severe nitrification problems have occurred. Complete inhibition of nitrification has been recognized once and a general reduction of nitrification capacity has been found compared to design, to other Swedish treatment plants and to internationally accepted design criteria. A comprehensive examination of inhibition of nitrification has identified industrial sources as the dominating contributors. Some industries have been identified as important sources but fighting inhibition of nitrification requires more than tracking down a few dominating in

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33

Yang, Mengfan, Dongmei Xue, Fanqiao Meng, and Zhong-Liang Wang. "The effects of salinity on coupled nitrification and aerobic denitrification in an estuarine system." Water Science and Technology 71, no. 11 (2015): 1718–26. http://dx.doi.org/10.2166/wst.2015.159.

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Salinity has significant effects on nitrification and denitrification processes, particularly in estuarine systems. A dissolved oxygen-enriched river and its estuary in northern China were selected to investigate the impact of salinity gradients (0.6, 4, 7.6, 11.4 and 14.7‰) obtained from the mixing of river samples and estuarine samples with different proportions on coupled nitrification and aerobic denitrification via incubation experiments (35 and 10 °C). Results indicated that: (a) nitrification and coupled nitrification-aerobic denitrification occurred for all treatments, which resulted i

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Shan, Mingjun, Yan Zhang, and Lihong Kou. "Nitrogen balance and transformation in the nitrification process of coking wastewater and the influence on nitrification kinetics." Water Science and Technology 69, no. 7 (2014): 1541–45. http://dx.doi.org/10.2166/wst.2014.054.

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This paper describes the total nitrogen balance, and the direction and degree of nitrogen transformation during the nitrification process of coking wastewater. According to the actual nitrification process, the conventional nitrification kinetic equation was amended. After 48 h of nitrification, the total nitrogen content remained almost the same with error less than 0.6%. The total removal efficiency of NH4+-N was 91.1%, in which blow-off, producing cells and transforming to nitrate nitrogen accounted for 1.1, 17.8 and 72.2% respectively. Considering the influences of NH4+-N blow-off and conv

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Veuger, B., A. Pitcher, S. Schouten, J. S. Sinninghe Damsté, and J. J. Middelburg. "Nitrification and growth of autotrophic nitrifying bacteria and Thaumarchaeota in the coastal North Sea." Biogeosciences Discussions 9, no. 11 (2012): 16877–906. http://dx.doi.org/10.5194/bgd-9-16877-2012.

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Abstract. Nitrification and the associated growth of autotrophic nitrifiers, as well as the contributions of bacteria and Thaumarchaeota to total autotrophic C-fixation by nitrifiers were investigated in the Dutch coastal North Sea from October 2007 to March 2008. Rates of nitrification were determined by incubation of water samples with 15N-ammonium and growth of autotrophic nitrifiers was measured by incubation with 13C-DIC in the presence and absence of nitrification inhibitors (nitrapyrin and chlorate) in combination with compound-specific stable isotope (13C) analysis of bacterial- and Th

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Veuger, B., A. Pitcher, S. Schouten, J. S. Sinninghe Damsté, and J. J. Middelburg. "Nitrification and growth of autotrophic nitrifying bacteria and Thaumarchaeota in the coastal North Sea." Biogeosciences 10, no. 3 (2013): 1775–85. http://dx.doi.org/10.5194/bg-10-1775-2013.

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Abstract. Nitrification and the associated growth of autotrophic nitrifiers, as well as the contributions of bacteria and Thaumarchaeota to total autotrophic C-fixation by nitrifiers were investigated in the Dutch coastal North Sea from October 2007 to March 2008. Rates of nitrification were determined by incubation of water samples with 15N-ammonium and growth of autotrophic nitrifiers was measured by incubation with 13C-DIC (dissolved inorganic carbon) in the presence and absence of nitrification inhibitors (nitrapyrin and chlorate) in combination with compound-specific stable isotope (13C)

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37

Duncan, Elliott G., Cathryn A. O'Sullivan, Anna K. Simonsen, et al. "The nitrification inhibitor 3,4,-dimethylpyrazole phosphate strongly inhibits nitrification in coarse-grained soils containing a low abundance of nitrifying microbiota." Soil Research 55, no. 1 (2017): 28. http://dx.doi.org/10.1071/sr15359.

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The effectiveness of the nitrification inhibitor 3,4,-dimethylpyrazole phosphate (DMPP) on sandy soils containing low nitrifying microbial abundance has not been established. Two coarse-grained soils, representative of Western Australia’s agricultural zones, were incubated with 100mgNkg–1 soil, added as either urea, urea+DMPP or urea+nitrapyrin as an alternative nitrification inhibitor for comparative purposes. Ammonium (NH4+) and nitrate (NO3–) concentrations, potential nitrification rates (PNR) and the abundance of ammonia-oxidising bacteria (AOB) and archaea (AOA) were measured over time. I

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Malyan, Sandeep. "Nitrification Inhibitors: A Perspective tool to Mitigate Greenhouse Gas Emission from Rice Soils." Current World Environment 11, no. 2 (2016): 423–28. http://dx.doi.org/10.12944/cwe.11.2.10.

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Rice fields are significant contributors of greenhouse gases mainly methane and nitrous oxide to the atmosphere. Increasing concentrations of these greenhouse gases play significant role in changing atmospheric chemistry such as mean air temperature, rainfall pattern, drought, and flood frequency. Mitigation of greenhouse gases for achieving sustainable agriculture without affecting economical production is one the biggest challenge of twenty first century at national and global scale. On the basis of published scientific studies, we hereby assess the use of nitrification inhibitors for greenh

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39

Myoga, H., H. Asano, Y. Nomura, and H. Yoshida. "Effects of Immobilization Conditions on the Nitrification Treatability of Entrapped Cell Reactors Using the PVA Freezing Method." Water Science and Technology 23, no. 4-6 (1991): 1117–24. http://dx.doi.org/10.2166/wst.1991.0563.

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The effects of immobilization conditions, such as freezing temperature, amount of seed sludge, gel size and mixing of other microorganisms with seed sludge, on the nitrification treatability of entrapped cell reactors using the PVA freezing method are discussed. Results indicated that the freezing temperature did not affect nitrification treatability within the range from −20 °C to −80 °C. The amount of seed sludge affected the start-up time and maximum nitrification rate, but the effects were not in proportion to the amount of seed sludge. Regarding the gel size, the maximum nitrification rat

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40

Wu, Di, Xing Wang Wen, and Hui Ling Liu. "Inhibition and Recovery of Nitrification during the Process of Sludge Reduction Induced by a Metabolic Uncoupler, 2,6-Dichlorophenol (2,6-DCP)." Advanced Materials Research 937 (May 2014): 92–98. http://dx.doi.org/10.4028/www.scientific.net/amr.937.92.

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2,6-DCP was found to be an efficient metabolic uncoupler to reduce sludge production. 20mg/L 2,6-DCP could reduce sludge production about 34.62%, however, it also affected nitrification seriously, the nitrification inhibition was about 76.17% compared to control. Environmental factors, temperature and pH, were varied to repair nitrification. The nitrification inhibition was decreased to 45.7% at 28±1 ◦C and pH=8.5±0.2. Nitrification inhabitation was further decreased to 30% when the 2,6-DCP concentration reduced to 10 mg/L, the sludge reduction also decreased to17.9%. The 30-day operation data

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41

Kreuzinger, N., A. Farnleitner, G. Wandl, R. Hornek, and R. Mach. "Molecular biological methods (DGGE) as a tool to investigate nitrification inhibition in wastewater treatment." Water Science and Technology 47, no. 11 (2003): 165–72. http://dx.doi.org/10.2166/wst.2003.0601.

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Incomplete nitrification at an activated sludge plant for biological pre-treatment of rendering plant effluents led to a detailed investigation on the origin and solution of this problem. Preliminary studies revealed that an inhibition of ammonia oxidising microorganisms (AOM) by process waters of the rendering plant was responsible for the situation. We were able to show a correlation between the existence of specific AOM and nitrification capacity expressed as oxygen uptake rate for maximal nitrification (OURNmax). Only Nitrosospira sp. was found in the activated sludge of the rendering plan

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42

Mukhtar, Hussnain, Yu-Pin Lin, Chiao-Ming Lin, and Yann-Rong Lin. "Relative Abundance of Ammonia Oxidizing Archaea and Bacteria Influences Soil Nitrification Responses to Temperature." Microorganisms 7, no. 11 (2019): 526. http://dx.doi.org/10.3390/microorganisms7110526.

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Ammonia oxidizing archaea (AOA) and bacteria (AOB) are thought to contribute differently to soil nitrification, yet the extent to which their relative abundances influence the temperature response of nitrification is poorly understood. Here, we investigated the impact of different AOA to AOB ratios on soil nitrification potential (NP) across a temperature gradient from 4 °C to 40 °C in twenty different organic and inorganic fertilized soils. The temperature responses of different relative abundance of ammonia oxidizers for nitrification were modeled using square rate theory (SQRT) and macromol

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43

Dollhopf, Sherry L., Jung-Ho Hyun, April C. Smith, Harold J. Adams, Sean O'Brien, and Joel E. Kostka. "Quantification of Ammonia-Oxidizing Bacteria and Factors Controlling Nitrification in Salt Marsh Sediments." Applied and Environmental Microbiology 71, no. 1 (2005): 240–46. http://dx.doi.org/10.1128/aem.71.1.240-246.2005.

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ABSTRACT To elucidate the geomicrobiological factors controlling nitrification in salt marsh sediments, a comprehensive approach involving sediment geochemistry, process rate measurements, and quantification of the genetic potential for nitrification was applied to three contrasting salt marsh habitats: areas colonized by the tall (TS) or short (SS) form of Spartina alterniflora and unvegetated creek banks (CBs). Nitrification and denitrification potential rates were strongly correlated with one another and with macrofaunal burrow abundance, indicating that coupled nitrification-denitrificatio

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44

Xiao, Jing, and Jin Hua Tang. "Nitrogen Removal with Nitrification and Denitrification via Nitrite." Advanced Materials Research 908 (March 2014): 175–78. http://dx.doi.org/10.4028/www.scientific.net/amr.908.175.

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Biological nitrification and denitrification via nitrite pathway is technically feasible and economically favorable, especially when wastewater with high ammonium concentrations or low C/N ratios is treated. Therefore, it has attracted more and more attention. It is very important to maintain partial nitrification of ammonium to nitrite. In this paper, the factors that influence operation and efficiency of nitrification and denitrification via nitrite are discussed, including DO concentration, carbon source, aeration pattern, PH, temperature and high free ammonia. High ammonia concentration an

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Okey, Robert W., H. David Stensel, and Mary C. Martis. "Modeling nitrification inhibition." Water Science and Technology 33, no. 6 (1996): 101–7. http://dx.doi.org/10.2166/wst.1996.0086.

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A quantitative structure-activity relationship (QSAR)-type model using groups and molecular connectivity has been developed on nitrification inhibition data derived from soil. The model has been tested against data derived from the inhibition of nitrification by specific nitrogen-containing pesticides. A second QSAR-type model developed from acclimated biodegradation data has been applied to the pesticides tested for nitrification inhibition. Data on the impact of specific compounds on activated sludge nitrification have been included and the soil model applied to these activated sludge data.

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Gilmour, J. T. "The Effects of Soil Properties on Nitrification and Nitrification Inhibition." Soil Science Society of America Journal 49, no. 2 (1985): 519. http://dx.doi.org/10.2136/sssaj1985.03615995004900020051x.

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He, Feifei, Haohao Yu, Dandan Liu, and Zheng Li. "Microorganism community composition analysis coupling with ¹⁵N tracer experiments reveals the nitrification rate and N₂O emissions in low pH soils in Southern China." Open Life Sciences 17, no. 1 (2022): 55–63. http://dx.doi.org/10.1515/biol-2022-0010.

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Abstract Nitrification in agricultural soil is an important process for food production. In acidic soil, nitrification is however also considered to be a major source of N2O production. The nitrification rate largely depends on the community composition of ammonia-oxidizing organisms. To obtain a view of the nitrification rates and N2O emission situations in low pH soils in Southern China and understand their relations with the microbial community composition, here we conducted 15N tracer experiments and microorganism community composition analysis using four acidic agricultural soil samples c

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Petropoulos, Penny, and Kimberley A. Gilbride. "Nitrification in activated sludge batch reactors is linked to protozoan grazing of the bacterial population." Canadian Journal of Microbiology 51, no. 9 (2005): 791–99. http://dx.doi.org/10.1139/w05-069.

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Protozoa feed upon free-swimming bacteria and suspended particles inducing flocculation and increasing the turnover rate of nutrients in complex mixed communities. In this study, the effect of protozoan grazing on nitrification was examined in activated sludge in batch cultures maintained over a 14-day period. A reduction in the protozoan grazing pressure was accomplished by using either a dilution series or the protozoan inhibitor cycloheximide. As the dilutions increased, the nitrification rate showed a decline, suggesting that a reduction in protozoan or bacterial concentration may cause a

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49

Wang, S. Y., D. W. Gao, Y. Z. Peng, P. Wang, and Q. Yang. "Nitrification-denitrification via nitrite for nitrogen removal from high nitrogen soybean wastewater with on-line fuzzy control." Water Science and Technology 49, no. 5-6 (2004): 121–27. http://dx.doi.org/10.2166/wst.2004.0745.

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This study is to demonstrate the performance of a new technology for complete nitrogen removal from soybean wastewater with high nitrogen concentrations. Nitrification-denitrification via nitrite was performed in three kinds of operating condition, i.e. nitrification-denitrification via nitrite under traditional SBR process, nitrification-denitrification via nitrite by alternating oxic/anoxic under fixed-time control and nitrification-denitrification via nitrite by alternating oxic/anoxic under on-line fuzzy control.The best one is nitrification-denitrification via nitrite by alternating oxic/

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Nemergut, D. R., and S. K. Schmidt. "Disruption of narH, narJ, and moaE Inhibits Heterotrophic Nitrification in Pseudomonas Strain M19." Applied and Environmental Microbiology 68, no. 12 (2002): 6462–65. http://dx.doi.org/10.1128/aem.68.12.6462-6465.2002.

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ABSTRACT Interruptions in three nitrate reductase-related genes, narH, narJ, and moaE, inhibited heterotrophic nitrification in Pseudomonas strain M19. No nitrate was detected in the medium, and nitrification proceeded in the presence of a nitrate reductase inhibitor. Heterotrophic nitrification was greatly stimulated by the addition of nitrate.

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