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Journal articles on the topic 'Nitrification simultaneous'

Author: Grafiati

Published: 4 June 2021

Last updated: 17 February 2022

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1

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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2

Puznava, N., M. Payraudeau, and D. Thornberg. "Simultaneous nitrification and denitrification in biofilters with real time aeration control." Water Science and Technology 43, no. 1 (2001): 269–76. http://dx.doi.org/10.2166/wst.2001.0057.

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The aim of this article is to present a new biological aerated filter (BAF) for nitrogen removal based on simultaneous nitrification and denitrification. Contrary to the systems which integrate both an aerated and a non-aerated zone to allow complete nitrogen removal in one compact or two different units (pre-denitrification and nitrification), this upflow BAF system is based on the principle of simultaneous nitrification and denitrification since the filter is completely aerated. The denitrification process is possible due to the diffusion effect which dominates biofilm processes. The real ti

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3

DARRAH, P. R., R. E. WHITE, and P. H. NYE. "Simultaneous nitrification and diffusion in soil." Journal of Soil Science 37, no. 3 (1986): 469–78. http://dx.doi.org/10.1111/j.1365-2389.1986.tb00378.x.

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4

DARRAH, P. R., P. H. NYE, and R. E. WHITE. "Simultaneous nitrification and diffusion in soil." Journal of Soil Science 37, no. 3 (1986): 479–84. http://dx.doi.org/10.1111/j.1365-2389.1986.tb00379.x.

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5

Watanabe, Yoshimasa, Sumio Masuda, Kiyoshi Nishidome, and Chalermraj Wantawin. "Mathematical Model of Simultaneous Organic Oxidation, Nitrification, and Denitrification in Rotating Biological Contactors." Water Science and Technology 17, no. 2-3 (1985): 385–97. http://dx.doi.org/10.2166/wst.1985.0145.

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Simultaneous organic oxidation and nitrification rates in the RBC are given using a mathematical equation. The equation was derived from a hypothesis stating that intrinsic oxygen uptake rate of the biofilm has a constant value at a fixed temperature , independent of the composition of the aerobic bacteria. Based on this hypothesis, empirical equations are proposed to describe the profile of intrinsic organic oxidation and nitrification rates. Computer simulation of the simultaneous organic oxidation and nitrification was carried out to confirm the empirical equations. The mathematical model o

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6

Gönenç, Ethem, and P. Harremoës. "Nitrification in rotating disc systems—II. Criteria for simultaneous mineralization and nitrification." Water Research 24, no. 4 (1990): 499–505. http://dx.doi.org/10.1016/0043-1354(90)90235-x.

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7

Zielińska, Magdalena, and Irena Wojnowska-Baryła. "Simultaneous Nitrification and Denitrification in Immobilised Biomass." Polish Journal of Natural Science 22, no. 1 (2007): 92–106. http://dx.doi.org/10.2478/v10020-007-0010-y.

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8

Pochana, Klangduen, Jürg Keller, and Paul Lant. "Model development for simultaneous nitrification and denitrification." Water Science and Technology 39, no. 1 (1999): 235–43. http://dx.doi.org/10.2166/wst.1999.0050.

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9

Menoud, P., C. H. Wong, H. A. Robinson, A. Farquhar, J. P. Barford, and G. W. Barton. "Simultaneous Nitrification and Denitrification using SiporaxTM Packing." Water Science and Technology 40, no. 4-5 (1999): 153–60. http://dx.doi.org/10.2166/wst.1999.0587.

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In this paper, we examine a biofilm process for simultaneous removal of ammonia and NOX (nitrite and nitrate). SiporaxTM, a porous Raschig-ring type filter specifically designed and manufactured for fast colonisation by micro-organisms, was used to demonstrate the feasibility of simultaneous nitrification (usually an aerobic process) and denitrification (usually an anaerobic or anoxic process) inside a single reactor. Clear evidence was found that denitrification occurred inside the internal pore structure of SiporaxTMrather than in an anoxic zone near the outlet of the reactor. The reactor wa

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10

Santos, V. A., J. Tramper, and R. H. Wijffels. "Simultaneous Nitrification and Denitrification Using Immobilized Microorganisms." Biomaterials, Artificial Cells and Immobilization Biotechnology 21, no. 3 (1993): 317–22. http://dx.doi.org/10.3109/10731199309117369.

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11

Nakhla, George, and Shaukat Farooq. "Simultaneous nitrification–denitrification in slow sand filters." Journal of Hazardous Materials 96, no. 2-3 (2003): 291–303. http://dx.doi.org/10.1016/s0304-3894(02)00219-4.

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12

Kundu, B. S., K. R. Dadarwal, and P. Tauro. "Nitrification and simultaneous denitrification byAzospirillum brasilense 12S." Journal of Biosciences 12, no. 1 (1987): 51–54. http://dx.doi.org/10.1007/bf02716953.

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13

Watanabe, Y., S. Okabe, K. Hirata, and S. Masuda. "Simultaneous removal of organic materials and nitrogen by micro-aerobic biofilms." Water Science and Technology 31, no. 1 (1995): 195–203. http://dx.doi.org/10.2166/wst.1995.0044.

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Simultaneous nitrification with denitrification was investigated using a single rotating biological contactor (RBC). The authors proposed two means to achieve simultaneous nitrification with denitrification in the single reactor: (1) to control oxygen transfer rate by reducing oxygen partial pressure (P02) in the air phase and (2) to develop a combined partially (aerobic) and fully (anaerobic) submerged RBC (CPFSR) reactor. For the former experiment, the maximum denitrification efficiency of 90 % was obtained at C:N ratio=6 and P02=0.10 atm. Moreover, heterotrophs, NH4- and NO2-oxidizers, and

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14

Watanabe, T., S. Hashimoto, and M. Kuroda. "Simultaneous nitrification and denitrification in a single reactor using bio-electrochemical process." Water Science and Technology 46, no. 4-5 (2002): 163–69. http://dx.doi.org/10.2166/wst.2002.0577.

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Feasibility of a bio-electrochemical process for simultaneous nitrification and denitrification in a single reactor was experimentally investigated. The reactor consisted of anodic and cathodic electrodes, on which nitrifying and denitrifying biofilms, respectively, were fixed. Effects of the applied electric current and DO concentration in the bulk solution were examined. The TN removal could be achieved through the occurrence of nitrification and denitrification in anodic and cathodic biofilms, respectively. Both nitrification and denitrification rates increased with an increase in the appli

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15

Watanabe, Y., S. Masuda, and M. Ishiguro. "Simultaneous Nitrification and Denitrification in Micro-Aerobic Biofilms." Water Science and Technology 26, no. 3-4 (1992): 511–22. http://dx.doi.org/10.2166/wst.1992.0431.

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Simultaneous nitrification and denitrification (SND) occurs in a micro-aerobic biofilm. Using a partially submerged rotating biological contactor(RBC) whose air phase oxygen partial-pressure is controllable, an experimental investigation was made into the effects of the oxygen flux to the biofilm on the SND. The lower the oxygen flux the lower the nitrification efficiency and the higher the denitrification efficiency until the maximum nitrogen removal efficiency was obtained. The state was reached at an oxygen partial-pressure of about 0.1 atm. (oxygen flux= 0.35 g/m2/hour) in this study. Comp

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16

Helmer, Christine, and Sabine Kunst. "Simultaneous nitrification/denitrification in an aerobic biofilm system." Water Science and Technology 37, no. 4-5 (1998): 183–87. http://dx.doi.org/10.2166/wst.1998.0615.

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In the biological pretreatment of landfill leachate in Mechernich (Germany) a loss of inorganic nitrogen of up to 90% was observed in the nitrification step (rotating biological contactor) under low DO conditions. Ammonia was removed but only small amounts of nitrate were produced. Nitrite accumulation did not occur. In aerobic batch tests nitrogen loss was confirmed without any addition of organic substrate, even when homogenizing the biofilm mechanically to destroy possible anoxic microzones. N2 was measured as the gaseous end product of the process. From results presented it can be assumed

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17

Xin, Lu, and Kai Sun. "Study on Simultaneous Nitrification–Denitrification in Membrane Bioreactor." Advanced Materials Research 347-353 (October 2011): 1878–82. http://dx.doi.org/10.4028/www.scientific.net/amr.347-353.1878.

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This study was conducted to evaluate the performance of membrane bioreactors (MBR) for organics and nitrogen removal. The membrane bioreactor was fed with domestic sewage and operated at different contents of dissolved oxygen (DO), different hydraulic retention time (HRT), and various mixed liquor suspended solid (MLSS) concentrations. The results showed that the distribution of DO level in MBR imposed a significant effect on simultaneous nitrification–denitrification (SND), and the optimal DO concentration should be controlled between 0.5 mg/L to1 mg/L. The denitrification was found to show t

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18

Sen, Priyali, and Steven K. Dentel. "Simultaneous nitrification-denitrification in a fluidized bed reactor." Water Science and Technology 38, no. 1 (1998): 247–54. http://dx.doi.org/10.2166/wst.1998.0059.

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This paper describes simultaneous nitrification-denitrification (SND) in a fluidized bed reactor (FBR) without physical separation of the aerobic and anoxic zones. Continuous reactor SND trials demonstrated successful SND over distinct periods. Control was achieved by varying the reactor dissolved oxygen and the feed COD, although optimal performance could not be consistently maintained. Batch studies, using cultures from different vertical sections, demonstrated that variation of the bulk parameters successfully stratified the reactor bed into zones that predominantly either nitrified or deni

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19

Gupta, S. K., S. M. Raja, and A. B. Gupta. "Simultaneous nitrification‐denitrification in a rotating biological contactor." Environmental Technology 15, no. 2 (1994): 145–53. http://dx.doi.org/10.1080/09593339409385414.

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20

Liu, Xiao, Mei Yang, and Xian Huai Huang. "Simultaneous Nitrification and Denitrification in Biofilm-Electrode Reactor." Advanced Materials Research 652-654 (January 2013): 1633–36. http://dx.doi.org/10.4028/www.scientific.net/amr.652-654.1633.

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To study the nitrification and denitrification in compartmented biofilm-electrode reactor (C-BER) under limited oxygen, influence of mild electrolysis on nitrogen removal was investigated under low C/N (mole ratios) with dissolved oxygen about 1mg/ L. It was found that nitrogen removal was mainly through simultaneous nitrification and denitrification (SND). C/N ratio was 1, average total nitrogen (TN) removal efficiencies were 33% and 45% for electric current of 5 and 15mA. C/N was 0.5, electric current was 25mA and effluent was recirculated, TN removal efficiency increased to 60%, within whic

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21

Ju, Lu-Kwang, Lin Huang, and Hiren Trivedi. "Simultaneous Nitrification and Denitrification through Low-Do Operation." Proceedings of the Water Environment Federation 2006, no. 11 (2006): 1583–97. http://dx.doi.org/10.2175/193864706783750376.

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22

MASUDA, Sumio, Yoshimasa WATANABE, and Masayoshi ISHIGURO. "Simulation of simultaneous reactions of nitrification and denitrification." Journal of Environmental Conservation Engineering 19, no. 5 (1990): 294–98. http://dx.doi.org/10.5956/jriet.19.294.

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23

Khardenavis, Anshuman A., Atya Kapley, and Hemant J. Purohit. "Simultaneous nitrification and denitrification by diverse Diaphorobacter sp." Applied Microbiology and Biotechnology 77, no. 2 (2007): 403–9. http://dx.doi.org/10.1007/s00253-007-1176-5.

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24

Boutet, E., S. Baillargeon, B. Patry, and P. Lessard. "Simultaneous organic matter removal and nitrification of an inert self-supporting immersed media to upgrade aerated lagoons." Water Science and Technology 77, no. 1 (2017): 51–59. http://dx.doi.org/10.2166/wst.2017.511.

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Abstract A pilot study was performed to evaluate the potential of an inert self-supported immersed fixed film media to upgrade aerated lagoons. Simultaneous organic matter removal and nitrification was assessed under different loading rates and temperatures (near 0 °C) using 12 laboratory-scale reactors operated in parallel. Test results showed that both the temperature and the load have an influence on organic matter effluent concentrations. Effluent quality seemed related to the observed biofilm thickness. Thicker biofilm is believed to have contributed to biomass detachment and increased pa

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25

He, Sheng-bing, Gang Xue, and Bao-zhen Wang. "Factors affecting simultaneous nitrification and de-nitrification (SND) and its kinetics model in membrane bioreactor." Journal of Hazardous Materials 168, no. 2-3 (2009): 704–10. http://dx.doi.org/10.1016/j.jhazmat.2009.02.099.

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26

Li, Na, and Jun Li Huang. "Preparation of New Mesoporous Biological Carriers and Performance of Simultaneous Nitrification and Denitrification." Advanced Materials Research 531 (June 2012): 437–41. http://dx.doi.org/10.4028/www.scientific.net/amr.531.437.

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In recent years, the simultaneous nitrification and denitrification (SND) was a focal point of research about the denitrification. In this paper, the new mesoporous biological carrier was prepared by using the active sludge of wastewater treatment plant as raw material, and its structure was characterized by x-ray fluorescence spectrometer (XPS), scanning electron microscopy and differential thermal analyses and thermogravimetric analysis (DTA-TG). At the same time, its performance of simultaneous nitrification and denitrification towards coking wastewater was evaluated in the three-phase aero

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27

Barbosa, Izabela Major, José Carlos Mierzwa, Ivanildo Hespanhol, and Eduardo Lucas Subtil. "Removal of nitrogen and organic matter in a submerged-membrane bioreactor operating in a condition of simultaneous nitrification and denitrification." Ambiente e Agua - An Interdisciplinary Journal of Applied Science 11, no. 2 (2016): 304. http://dx.doi.org/10.4136/ambi-agua.1684.

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This study evaluated the removal of nitrogen and organic matter in a membrane bioreactor system operating in a condition of simultaneous nitrification and denitrification controlled by intermittent aeration. A submerged-membrane system in a bioreactor was used in a pilot scale to treat domestic wastewater. The dissolved oxygen concentration was maintained between 0.5 and 0.8 mg L-1. The concentration of the mixed liquor suspended solids (MLSS) in the system ranged from 1 to 6 g L-1. The system efficiency was evaluated by the removal efficiency of organic matter, quantified by Chemical Oxygen D

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28

Wang, Te, Zhao Xia Liu, Mei Juan Wu, et al. "Screening and Characterization of a Bacterium Capable of Simultaneous Heterotrophic Nitrification and Aerobic Denitrification at High Concentrations of Ammonia-Nitrogen." Applied Mechanics and Materials 665 (October 2014): 487–90. http://dx.doi.org/10.4028/www.scientific.net/amm.665.487.

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A bacterium capable of simultaneous heterotrophic nitrification and aerobic denitrification at high concentrations of ammonia-nitrogen was screened and identified and the denitrification property was investigated in this paper. The strain was isolated from aeration tank of wastewater disposed by activated sludge and analyzed and identified by 16S rDNA. The effects of different carbon sources and carbon and nitrogen mass ratios on denitrification rate were studied. The changes of various forms of ammonia-nitrogens during the simultaneous heterotrophic nitrification and aerobic denitrification p

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29

Niu, Ming Fen, and Hai Jiao Yu. "Study on the Technology of Shortcut Nitrification-Denitrification Simultaneous Phosphorus Removal." Advanced Materials Research 864-867 (December 2013): 1503–8. http://dx.doi.org/10.4028/www.scientific.net/amr.864-867.1503.

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Shortcut Nitrification-Denitrification Simultaneous Phosphorus Removal applying in sequencing batch reactor were achieved successfully by Changing the run mode of SBR and controlling the operating conditions. When the MLSS:4700mg/L, PH:7.5~8.0 and DO:0.3~0.5mg/L(Aerobic phase), the removal rate of TP was more than 98%, the nitrite accumulation rate was more than 85%. After the reaction period of Shortcut Nitrification-Denitrification simultaneous Phosphorus Removal, the concentration of NH4+-N was below 50mg/L and the concentration of TP was less than 0.5mg/L.

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30

Pochana, Klangduen, and Jürg Keller. "Study of factors affecting simultaneous nitrification and denitrification (SND)." Water Science and Technology 39, no. 6 (1999): 61–68. http://dx.doi.org/10.2166/wst.1999.0262.

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Experiments have been performed to gain an understanding of the conditions and processes governing the occurrence of SND in activated sludge systems. Sequencing batch reactors (SBRs) have been operated under controlled conditions using the wastewater from the first anaerobic pond in an abattoir wastewater treatment plant. Under specific circumstances, up to 95% of total nitrogen removal through SND has been found in the system. Carbon source and oxygen concentrations were found to be important process parameters. The addition of acetate as an external carbon source resulted in a significant in

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31

Trivedi, Hiren, and Tim Weir. "SIMULTANEOUS NITRIFICATION / DENITRIFICATION USING NADH FLUORESCENCE THE SYMBIOTM PROCESS." Proceedings of the Water Environment Federation 2001, no. 3 (2001): 159–71. http://dx.doi.org/10.2175/193864701785019371.

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32

Barnard, J., M. Steichen, and C. deBarbadillo. "INTERACTION BETWEEN AERATOR TYPE AND SIMULTANEOUS NITRIFICATION AND DENITRIFICATION." Proceedings of the Water Environment Federation 2004, no. 13 (2004): 359–77. http://dx.doi.org/10.2175/193864704784137819.

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33

Qiu, Gao Shun, Ling Feng Qiu, and Yi Ming Chen. "The Realization of Nitrification and Denitrification Processes in Low C/N Sewage." Advanced Materials Research 233-235 (May 2011): 600–603. http://dx.doi.org/10.4028/www.scientific.net/amr.233-235.600.

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The influences of HRT, C/N ratio on simultaneous nitrification and denitrification (SND) and the rule of pH in a sequencing batch reactor (SBR) were investigated while treating low C/N synthetic municipal wastewater. The results showed that the function of SND became more outstanding and the removal rate of TN, NH4+-N was improved greatly by lengthening HRT appropriately; when the C/N increased, the denitrification effect of the simultaneous nitrification and denitrification would be improved; .At the same time, the variation of pH value was well related to ammonia oxidation. So that judgment

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34

Ito, Tsukasa, Toru Aoi, Naoki Miyazato, et al. "Diversity and abundance of denitrifying bacteria in a simultaneously nitrifying and denitrifying rotating biological contactor treating real wastewater at low temperatures." H2Open Journal 2, no. 1 (2019): 58–70. http://dx.doi.org/10.2166/h2oj.2019.021.

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Abstract Nitrification and denitrification processes occur simultaneously in aerobic wastewater biofilms. Although wide regions of the world have average temperatures of less than 15 °C for a half year, few studies have investigated the nitrogen removal by nitrification and denitrification in a single-stage aerobic biofilm reactor used for treating real wastewater under low-temperature conditions. This study showed successful wastewater treatment in a high average nitrogen removal rate of 78% at low water temperatures by simultaneous nitrification and denitrification in a rotating biological c

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35

Chen, G. H., H. Ozaki, and Y. Terashima. "Modelling of the Simultaneous Removal of Organic Substances and Nitrogen in a Biofilm." Water Science and Technology 21, no. 8-9 (1989): 791–804. http://dx.doi.org/10.2166/wst.1989.0282.

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A mathematical model of the simultaneous removal of organic substances and nitrogen compounds in a biofilm reactor was developed, taking account of the relationships between oxidation, nitrification, denitrification, and mass transport. The model consists of a set of simultaneous mass balance equations for organic substances, ammonium nitrogen, oxidized nitrogen, oxygen, and alkalinity within the biofilm, and another set of transport equations for these substances within diffusion layer of the biofilm. Synthetic dual and triple Monod-type kinetics describing, respectively, oxidation, and nitri

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36

Wang, Bing, Yi Xiao, Shou Hui Tong, et al. "Study on De-Nitrification of Improved Step-Feed Progress." Applied Mechanics and Materials 703 (December 2014): 171–74. http://dx.doi.org/10.4028/www.scientific.net/amm.703.171.

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Improved step-feed de-nitrification progress combined with biological fluidized bed was introduced in this study. The progress had good performance and capacity of de-nitrification and organic matter. The experiment result showed that the de-nitrification efficiency of the improved biological fluidized bed with step-feed process was higher than the fluidized bed A/O process under the same water quality and the operating conditions. When the influent proportion of each segment was equal, the system showed good nitrogen removal efficiency with the change of influent C/N ratio, HRT and sludge ret

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37

Zheng, Min, Yan-chen Liu, Kang-ning Xu, et al. "Use of low frequency and density ultrasound to stimulate partial nitrification and simultaneous nitrification and denitrification." Bioresource Technology 146 (October 2013): 537–42. http://dx.doi.org/10.1016/j.biortech.2013.07.044.

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38

Goto, M., S. Kuribayashi, Y. Nonaka, and M. Yamazaki. "Simultaneous removal of nitrogen and phosphorus with A2/O process using immobilized media." Water Science and Technology 46, no. 11-12 (2002): 113–19. http://dx.doi.org/10.2166/wst.2002.0725.

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It is necessary to introduce nitrogen and phosphorus removal processes in the existing wastewater treatment plants of Fukuoka City to improve the water quality of Hakata Bay. An A2/O (anaerobic-anoxic-oxic) process using immobilized media is proposed here, as a high-end technology to meet stricter discharge standards when faced with treatment space limitations. In order to investigate the applicability of the process, a pilot-scale study using municipal wastewater was conducted. Fluidized immobilization media were added to the aerobic reactor to maintain a high concentration of nitrifying bact

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39

Jia, Yan Ping, Lan He Zhang, Zhi Ling Zhao, and Tao Yang. "Effect of Sludge Loading on the Simultaneous Nitrification and Denitrification by Using a Sequencing Batch Bioreactor." Advanced Materials Research 183-185 (January 2011): 231–35. http://dx.doi.org/10.4028/www.scientific.net/amr.183-185.231.

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In this study, a sequencing batch reactor (SBR) was used to treat synthetic wastewater when dissolved oxygen (DO) concentration and temperature were 0.5-1.0mg/L and 30±1°C, respectively. Effect of sludge loading(Ns) on simultaneous nitrification and denitrification (SND) was investigated. The results indicated that removal efficiencies of ammonia nitrogen (NH4+-N), COD and total nitrogen (TN) were all higher than 90%, respectively, when influent NH4+-N and Ns were 35-45mg/L, 0.15kgCOD/(kgMLSS•d) under 7 hours of aeration time and 1 hour of idle time, respectively. Therefore, the SBR has obviou

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40

Zeng, R. J., R. Lemaire, Z. Yuan, and J. Keller. "A novel wastewater treatment process: simultaneous nitrification, denitrification and phosphorus removal." Water Science and Technology 50, no. 10 (2004): 163–70. http://dx.doi.org/10.2166/wst.2004.0635.

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Simultaneous nitrification and denitrification (SND) via the nitrite pathway and anaerobic–anoxic enhanced biological phosphorus removal (EBPR) are two processes that can significantly reduce the COD demand for nitrogen and phosphorus removal. The combination of these two processes has the potential of achieving simultaneous nitrogen and phosphorus removal with a minimal requirement for COD. A lab-scale sequencing batch reactor (SBR) was operated in alternating anaerobic–aerobic mode with a low dissolved oxygen concentration (DO, 0.5 mg/L) during the aerobic period, and was demonstrated to acc

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41

O'Neill, Mike, and Nigel J. Horan. "Achieving simultaneous nitrification and denitrification of wastewaters at reduced cost." Water Science and Technology 32, no. 9-10 (1995): 303–12. http://dx.doi.org/10.2166/wst.1995.0697.

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The Orbal process for the treatment of waste waters, claims simultaneous nitrification and denitrification in the outer lane in the presence of a dissolved oxygen concentration of 1.5 mg/l. The potential of this process is to offer both a reduced cost and simplified operation for nitrogen removal in the Mediterranean environment. The objective of this work was to investigate these claims and attempt to describe a mechanism for the experimental verifications. Using mixed cultures grown in chemostats, simultaneous nitrification and denitrification was observed under oxic/anoxic cycling. A reduce

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42

Yamagiwa, Kazuaki, Masanori Yoshida, Akira Ito, and Akira Ohkawa. "A new oxygen supply method for simultaneous organic carbon removal and nitrification by a one-stage biofilm process." Water Science and Technology 37, no. 4-5 (1998): 117–24. http://dx.doi.org/10.2166/wst.1998.0598.

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A new oxygen supply method to biofilm is proposed for simultaneous organic carbon removal and nitrification. The main feature of the method is use of hydrophobic porous membrane or oxygen enrichment membrane as substratum of biofilm. In the biofilm formed on oxygen permeable membrane, oxygen is supplied from the bottom to the surface of the biofilm through the membrane while organic pollutants are supplied from the surface to the bottom of the biofilm. The oxygen supply method allows nitrifiers near the bottom region to grow with less competition from BOD oxidizers. The microbial population wa

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43

Henderson, J. Paul, and James W. Atwater. "High ammonia landfill leachate treatment using anaerobic filter and rotating biological contactor." Canadian Journal of Civil Engineering 22, no. 5 (1995): 992–1000. http://dx.doi.org/10.1139/l95-115.

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A pre-denitrifying anaerobic filter and a rotating biological contactor (RBC) were used to remove nitrogen from a high ammonia landfill leachate collected from a municipal and industrial solid waste landfill in Kaohsiung, Taiwan, Republic of China. The research indicated that greater than 95% ammonia removal from high ammonia-N (2140 mg/L) leachate can be achieved with RBC ammonia-N loading rates up to 1.5 g/(m2∙d). At RBC loading rates of 1.5–3.0 g/(m2∙d), ammonia removal ranged from 80% to 90%. Nitrogen removal averaged 66%, including an estimated 54% removal in the RBC. Nitrogen removal in

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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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Zhao, Hui Wei, Ke Fang Zhang, Hong Wei Rong, Chao Sheng Zhang, and Zhi Wen Yang. "Effect of Carbon Nitrogen Ratio on Simultaneous Nitrification and Denitrification via Nitrite Technology in Sequencing Batch Biofilm Reactor and the Process Control." Advanced Materials Research 777 (September 2013): 232–37. http://dx.doi.org/10.4028/www.scientific.net/amr.777.232.

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This study aimed to evaluate the effect of carbon nitrogen ratio (COD/N) on simultaneous nitrification and denitrification (SND) via nitrite technology in SBBR and the process control. Under the condition of different C/N ratios respectively 1.8, 3.6, 7,5,11.1 and 13.7, the various indices of the removal efficiency in the system and DO, ORP, and pH in the process of reaction were investigated. The C/N ratio was found to be an important limiting factor for SBBR simultaneous nitrification and denitrification via nitrite process. After integrating the factor of energy consumption and removal effi

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Jin, Peng, Yinyan Chen, Zhanwang Zheng, and Qizhen Du. "Evaluation of a novel low-carbon to nitrogen- and temperature-tolerant simultaneously nitrifying–denitrifying bacterium and its use in the treatment of river water." RSC Advances 8, no. 48 (2018): 27417–22. http://dx.doi.org/10.1039/c8ra04697b.

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DARRAH, P. R., R. E. WHITE, and P. H. NYE. "Simultaneous nitrification and diffusion in soil. II. The effects at levels of ammonium chloride which inhibit nitrification." Journal of Soil Science 37, no. 1 (1986): 41–52. http://dx.doi.org/10.1111/j.1365-2389.1986.tb00005.x.

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Moriyama, Katsumi, Kazuaki Sato, Yoshinobu Harada, Kazuo Washiyama, and Koich Okamoto. "Renovation of an Extended Aeration Plant for Simultaneous Biological Removal of Nitrogen and Phosphorus Using Oxic-Anaerobic-Oxic Process." Water Science and Technology 22, no. 7-8 (1990): 61–68. http://dx.doi.org/10.2166/wst.1990.0230.

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The effect of the oxidation reduction potential (i.e., ORP) control system on the simultaneous removal of nitrogen and phosphorus, utilizing the oxic-anaerobic-oxic process, was investigated. A full-scale wastewater treatment plant which was designed as an extended aeration process was modified for this process to study. The optimum ORP at the first basin for the simultaneous removal was 125 mV in this experiment. In the first oxic basin the nitrification reaction and the denitrification reaction occurred simultaneously to maintain the optimum level of the ORP value. The averaged values of the

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Trivedi, Hiren, and Nicolas Heinen. "SIMULTANEOUS NITRIFICATION / DENITRIFICATION BY MONITORING NADH FLUORESCENCE IN ACTIVATED SLUDGE." Proceedings of the Water Environment Federation 2000, no. 10 (2000): 785–801. http://dx.doi.org/10.2175/193864700784545036.

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Samstag, Randal W., Andre Gharagozian, Gil Bridges, and Al Bahl. "Full-scale Test and Simulation of Simultaneous Nitrification and Denitrification." Proceedings of the Water Environment Federation 2001, no. 11 (2001): 308–22. http://dx.doi.org/10.2175/193864701790860119.

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