Results 11 to 20 of about 16,177 (209)

Effect of Influent COD/N Ratio on Nitrification Rate in a Bench-scale Biological Reactor [PDF]

open access: yesآب و فاضلاب, 2005
Nitrification, the oxidation of ammonia to nitrate catalyzed by bacteria, is a key part of the global nitrogen cycle. In the first step of nitrification, chemolithoautotrophic ammonia oxidizers transform ammonia to nitrite, which subsequently oxidizes to
Bijan Bina   +2 more
doaj   +1 more source

High nitrification rate with upflow biofiltration

open access: yesWater Science and Technology, 1996
In order to investigate the upper limit of aerated biofilm processes, a series of experiments has been carried out on a pilot scale with a synthetic effluent containing only ammonium nitrogen and inorganic carbon as substrates.
H. Lemmel, R. Pujol, J.-G. Peladan
core   +3 more sources

Soil Nitrification Rate Is Affected by Plant Species and Nitrogen Levels

open access: yesAgriculture
The soil nitrification rate is significantly affected by plant species, and it is also modulated by different nitrogen levels in the soil. There are a wide range of plant species with the capacity to produce biological nitrification inhibitors (hereafter
Luca Vitale   +9 more
doaj   +2 more sources

Assesment of nitrification and denitrification rate in biological nitrogen removal from wastewater

open access: yesJournal of Environmental Engineering and Landscape Management, 2007
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
Giedrė Vabolienė   +1 more
doaj   +2 more sources

Relative efficacy and stability of biological and synthetic nitrification inhibitors in a highly nitrifying soil: Evidence of apparent nitrification inhibition by linoleic acid and linolenic acid [PDF]

open access: yes, 2021
Biological nitrification inhibition is a plant‐mediated rhizosphere process where natural nitrification inhibitors can be produced and released by roots to suppress nitrifier activity in soil.
Cardenas, L. M.   +14 more
core   +1 more source

THE RATE OF NITRIFICATION OF SOME FERTILIZERS. [PDF]

open access: yesJournal of the American Chemical Society, 1901
n ...
Withers, W. A., Fraps, G. S.
openaire   +1 more source

Effects of Temperature and Humidity on Soil Gross Nitrogen Transformation in a Typical Shrub Ecosystem in Yanshan Mountain and Hilly Region

open access: yesLife, 2023
Shrubland is a pivotal terrestrial ecosystem in China. Soil nitrogen transformations play a crucial role in maintaining the productivity of this ecosystem, yet the driving forces underlying it have not been sufficiently addressed, particularly under ...
Xiaoxia Hu   +7 more
doaj   +1 more source

A comparison of two nitrification inhibitors used to measure nitrification rates in estuarine sediments [PDF]

open access: yesFEMS Microbiology Ecology, 1995
Abstract Nitrification rates were measured using intact sediment cores from South San Francisco Bay and two different nitrification inhibitors: acetylene and methyl fluoride. Sediment oxygen consumption and ammonium and nitrate fluxes were also measured in these cores. Four experiments were conducted in the spring, and one in the fall of 1993.
J.M. Caffrey, L.G. Miller
openaire   +2 more sources

Increasing livestock wastewater application in alternate-furrow irrigation reduces nitrification gene abundance but not nitrification rate in rhizosphere [PDF]

open access: yes, 2019
Wastewater generated during livestock production is rich in nitrogen, but careless discharge could result in greenhouse gas emission, eutrophication or other problems.
Cui, E.   +7 more
core   +1 more source

Nitrification rates in the NW Mediterranean Sea [PDF]

open access: yesAquatic Microbial Ecology, 1999
During spring, ammonium oxidation and nitrite oxidation rates were measured in the NW basin of the Mediterranean Sea, from mesotrophic sites (Ligunan Sea and Gulf of Lions) to oligotrophc sites (Balearic Islands). Nitrification rates (average values for 37 measurements) ranged from 72 to 144 nmol of N oxidised 1-' d-', except in the RhBne River plume ...
Bianchi, M, Fosset, C, Conan, P
openaire   +2 more sources

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