Effect of temperature and free ammonia on nitrification and nitrite accumulation in landfill leachate and analysis of its nitrifying bacterial community by FISH

2006 ◽  
Vol 97 (3) ◽  
pp. 459-468 ◽  
Author(s):  
Dong-Jin Kim ◽  
Dong-Ig Lee ◽  
Jürg Keller
Keyword(s):  
Bacterial Community ◽  
Landfill Leachate ◽  
Free Ammonia ◽  
Effect Of Temperature ◽  
Nitrite Accumulation

Achieving nitrogen removal via nitrite pathway from urban landfill leachate using the synergetic inhibition of free ammonia and free nitrous acid on nitrifying bacteria activity

2013 ◽  
Vol 68 (9) ◽  
pp. 2035-2041 ◽  
Author(s):  
H. W. Sun ◽  
Y. Bai ◽  
Y. Z. Peng ◽  
H. G. Xie ◽  
X. N. Shi
Keyword(s):  
Landfill Leachate ◽  
Biological System ◽  
Nitrous Acid ◽  
Free Ammonia ◽  
Nitrifying Bacteria ◽  
Anaerobic Sludge ◽  
Nitrite Accumulation ◽  
Fish Analysis ◽  
Ammonia Oxidizing Bacteria ◽  
Free Nitrous Acid

In this study, a biological system consisting of an up-flow anaerobic sludge blanket (UASB) and anoxic–oxic (A/O) reactor was established for the advanced treatment of high ammonium urban landfill leachate. The inhibitory effect of free ammonia (FA) and free nitrous acid (FNA) on the nitrifying bacterial activity was used to achieve stable nitritation in the A/O reactor. The results demonstrated that the biological system achieved chemical oxygen demand (COD), total nitrogen (TN) and NH4+-N removal efficiencies of 95.3, 84.6 and 99.2%, respectively at a low carbon-to-nitrogen ratio of 3:1. Simultaneous denitritation and methanogenesis in the UASB could improve the removal of COD and TN. Nitritation with above 90% nitrite accumulation was successfully achieved in the A/O reactor by synergetic inhibition of FA and FNA on the activity of nitrite oxidizing bacteria (NOB). Fluorescence in situ hybridization (FISH) analysis showed that ammonia oxidizing bacteria (AOB) was dominant and was considered to be responsible for the satisfactory nitritation performance.

Nitrite accumulation in submerged biofilters - combined effects

1996 ◽  
Vol 34 (3-4) ◽  
pp. 371-378 ◽  
Author(s):  
F. Fdz-Polanco ◽  
S. Villaverde ◽  
P. A. Garcia
Keyword(s):  
Ammonia Concentration ◽  
Relative Activity ◽  
Free Ammonia ◽  
Effect Of Temperature ◽  
Ammonia Oxidizer ◽  
Ammonium Concentration ◽  
Nitrite Accumulation ◽  
Biological Aerated Filter ◽  
Ammonia Inhibition ◽  
Aerated Filter

The combined effect of temperature, pH and ammonium concentration over the nitrite accumulation phenomena in situations of free ammonia inhibition, their effect over the ammonia and nitrite oxidizer microorganiisms influence over the nitrification, have been studied in an Up-flow Biological Aerated Filter (UBAF). The free ammonia inhibition effect highly depends on the values of pH, temperature and ammonium concentration. For the same specific free ammonia concentration different values of temperature, pH and ammonium concentration bring about different nitrite accumulations. In conditions of no free ammonia inhibition and low values of temperature and pH, high ammonium concentrations bring about a higher relative activity of ammonia oxidizer microorganisms of the filter increases the nitratation efficiency in zones close to the outlet and will favour the nitrite accumulation in situations of free ammonia inhibition.

Modelling of biological nitrogen removal during treatment of piggery wastewater

2007 ◽  
Vol 55 (10) ◽  
pp. 11-19 ◽  
Author(s):  
F. Béline ◽  
H. Boursier ◽  
F. Guiziou ◽  
E. Paul
Keyword(s):  
Experimental Data ◽  
Maximum Growth ◽  
Ammonia Concentration ◽  
Pilot Scale ◽  
Free Ammonia ◽  
Effect Of Temperature ◽  
Nitrification Rate ◽  
Nitrite Accumulation ◽  
Piggery Wastewater ◽  
Pilot Scale Reactor

During this study, a mathematical model simulating piggery wastewater treatment was developed, with the objective of process optimisation. To achieve this, the effect of temperature and free ammonia concentration on the nitrification rate were experimentally studied using respirometry. The maximum growth rates obtained were higher for ammonium-oxidising biomass than for nitrite-oxidising biomass for the temperatures above 20 °C; values at 35 °C were equal to 1.9 and 1.35 day−1, respectively. No inhibition of nitrification was observed for free ammonia concentrations up to 50 mgN/L. Using these data with others experimental data obtained from a pilot-scale reactor to treat piggery wastewater, a model based on a modified version of the ASM1 was developed and calibrated. In order to model the nitrite accumulation observed, the ASM1 model was extended with a two-step nitrification and denitrification including nitrite as intermediate. Finally, the produced model called PiWaT1 demonstrated a good fit with the experimental data. In addition to the temperature, oxygen concentration was identified as an important factor influencing the nitrite accumulation during nitrification. Even if some improvements of the model are still necessary, this model can already be used for process improvement.

Effect of temperature on bacterial community in petroleum hydrocarbon-contaminated and uncontaminated Antarctic soil

Polar Biology ◽  
2018 ◽  
Vol 41 (9) ◽  
pp. 1763-1775 ◽  
Author(s):  
C. W. Chong ◽  
S. Silvaraj ◽  
Y. Supramaniam ◽  
I. Snape ◽  
I. K. P. Tan
Keyword(s):  
Bacterial Community ◽  
Petroleum Hydrocarbon ◽  
Effect Of Temperature ◽  
Antarctic Soil

Cross effect of temperature, pH and free ammonia on autotrophic denitrification process with sulphide as electron donor

Chemosphere ◽  
2014 ◽  
Vol 97 ◽  
pp. 10-15 ◽  
Author(s):  
Carmen Fajardo ◽  
Mabel Mora ◽  
Isaac Fernández ◽  
Anuska Mosquera-Corral ◽  
José Luis Campos ◽  
...  
Keyword(s):  
Electron Donor ◽  
Free Ammonia ◽  
Effect Of Temperature ◽  
Autotrophic Denitrification ◽  
Cross Effect ◽  
Denitrification Process

Biological Treatment of High Ammonium Content Urban Landfill Leachate Using an Anaerobic-Aerobic Process

2013 ◽  
Vol 781-784 ◽  
pp. 2095-2099
Author(s):  
Hong Wei Sun ◽  
Yong Jun You ◽  
Ying Guo
Keyword(s):  
Landfill Leachate ◽  
Inhibitory Effect ◽  
Nitrifying Bacteria ◽  
Anaerobic Sludge ◽  
Nitrite Accumulation ◽  
Fish Analysis ◽  
Free Nitrous Acid ◽  
Nitrite Oxidizing Bacteria ◽  
Anaerobic Sludge Blanket

Biological system consisting of an up-flow anaerobic sludge blanket (UASB) and anoxic-oxic (A/O) reactor was applied to treat high ammonium content urban landfill leachate. Inhibitory effect of free ammonia (FA) and free nitrous acid (FNA) on nitrifying bacteria activity was used to achieve nitrogen removal via nitrite pathway in the A/O. Results demonstrated that removed efficiencies of COD, total nitrogen (TN) and NH4+-N were 95.3%, 84.6 %and 99.2%, respectively. Stable nitrite pathway with above 90% nitrite accumulation was successfully achieved in the A/O reactor by synergetic inhibition of FA and FNA on the activity of nitrite oxidizing bacteria (NOB). Moreover, Fluorescence in situ hybridization (FISH) analysis showed that AOB was dominant microorganism.

Nitrite Accumulation during the Denitrification Process in SBR for the Treatment of Pre-treated Landfill Leachate

2009 ◽  
Vol 17 (6) ◽  
pp. 1027-1031 ◽  
Author(s):  
Hongwei SUN ◽  
Qing YANG ◽  
Yongzhen PENG ◽  
Xiaoning SHI ◽  
Shuying WANG ◽  
...  
Keyword(s):  
Landfill Leachate ◽  
Nitrite Accumulation ◽  
Denitrification Process
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