Effects of vegetation on ammonium removal and nitrous oxide emissions from pilot-scale drainage ditches

Abstract It is widely accepted that partial nitrification by ANAMMOX has the potential to become one of the key processes in wastewater treatment. However, large greenhouse gas emissions have been panobserved in many cases. A novel mesh separated reactor, developed to allow continuous operation of deammonification at smaller scale without external biomass selection, was compared to a conventional single-chamber deammonification sequencing batch reactor (SBR), where both were equally-sized pilot-scale reactors. The mesh reactor consisted of an aerated and an anoxic zone separated by a mesh. The resulting differences in the structure of the microbial community were detected by next-generation sequencing. When both systems were operated in a sequencing batch mode, both systems had comparable nitrous oxide emission factors in the range of 4% to 5% of the influent nitrogen load. A significant decrease was observed after switching from sequencing batch mode to continuous operation.

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N2O emissions from a one stage partial nitrification/anammox process in moving bed biofilm reactors

Water Science & Technology ◽

10.2166/wst.2013.232 ◽

2013 ◽

Vol 68 (1) ◽

pp. 144-152 ◽

Cited By ~ 18

Author(s):

Jingjing Yang ◽

Jozef Trela ◽

Elzbieta Plaza ◽

Kåre Tjus

Keyword(s):

Nitrous Oxide ◽

Pilot Scale ◽

Partial Nitrification ◽

Nitrous Oxide Emissions ◽

N2o Emissions ◽

Ammonium Oxidation ◽

Biofilm Reactors ◽

One Stage ◽

Nitrogen Loads

Nitrous oxide (N2O) emissions from wastewater treatment are getting increased attention because their global warming potential is around 300 times that of carbon dioxide. The aim of the study was to measure nitrous oxide emissions from one stage partial nitrification/anammox (Anaerobic Ammonium Oxidation) reactors, where nitrogen is removed in a biological way. The first part of the experimental study was focused on the measurements of nitrous oxide emissions from two pilot scale reactors in the long term; one reactor with intermittent aeration at 25 °C and the other reactor with continuous aeration at 22–23 °C. The second part of the experiment was done to evaluate the influence of different nitrogen loads and aeration strategies, described by the ratio between the non-aerated and aerated phase and the dissolved oxygen concentrations, on nitrous oxide emissions from the process. The study showed that 0.4–2% of the nitrogen load was converted into nitrous oxide from two reactors. With higher nitrogen load, the amount of nitrous oxide emission was also higher. A larger fraction of nitrous oxide was emitted to the gas phase while less was emitted with the liquid effluent. It was also found that nitrous oxide emissions were similar under intermittent and continuous aeration.

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Impact of manure management of different livestock on gaseous emissions: laboratory study

Australian Journal of Experimental Agriculture ◽

10.1071/ea07263 ◽

2008 ◽

Vol 48 (2) ◽

pp. 128 ◽

Cited By ~ 4

Author(s):

L. Loyon ◽

F. Guiziou ◽

P. Saint Cast

Keyword(s):

Nitrous Oxide ◽

Total Nitrogen ◽

Laboratory Study ◽

Ambient Air ◽

Pilot Scale ◽

Laying Hen ◽

Nitrous Oxide Emissions ◽

Manure Management ◽

Gaseous Emissions ◽

The Impact

A laboratory study investigated the impact of manure management and air temperature on the gaseous emissions of ammonia (NH3), methane (CH4), nitrous oxide (N2O) and carbon dioxide (CO2) from manure stored under summer and winter conditions. Trials were carried out for 10–18 days on a pilot scale and were located outside the laboratory with a standardised protocol for ambient air speed. The concentrations of N2O, CH4, and CO2 in exhaust air from the storage vessel were analysed sequentially either by infrared detection or by gas chromatography coupled with a flame ionisation detector/electron captor detector, while NH3 concentration was determined by passing the exhaust air through acid traps. The results confirm that manure composition and temperature affect emissions of CH4, N2O, CO2 and NH3. NH3 emissions, expressed as a percentage of total nitrogen present in manure, ranged from 0.1% (duck slurry) to 12% (laying hen droppings) in winter and from 0.03% (scraped farmyard cattle manure) to 13% (laying hen droppings) in summer. Whatever the manure, nitrous oxide emissions were low, less than 0.5% of the total nitrogen. Solid manure tends to produce more CO2 than CH4, while the opposite is observed with liquid manure.

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A regionally disaggregated inventory of nitrous oxide emissions from agricultural soils in Germany – a GIS-based empirical approach

Erdkunde ◽

10.3112/erdkunde.2014.02.04 ◽

2014 ◽

Vol 68 (2) ◽

pp. 125-144 ◽

Cited By ~ 9

Author(s):

Sebastian Brocks ◽

Hermann F. Jungkunst ◽

Georg Bareth

Keyword(s):

Nitrous Oxide ◽

Agricultural Soils ◽

Empirical Approach ◽

Nitrous Oxide Emissions

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Effects of Straw Recycling of Winter Covering Crop on Methane and Nitrous Oxide Emissions in Paddy Field

ACTA AGRONOMICA SINICA ◽

10.3724/sp.j.1006.2011.01666 ◽

2011 ◽

Vol 37 (9) ◽

pp. 1666-1675

Author(s):

Hai-Ming TANG ◽

Xiao-Ping XIAO ◽

Wen-Guang TANG ◽

Guang-Li YANG

Keyword(s):

Nitrous Oxide ◽

Paddy Field ◽

Nitrous Oxide Emissions

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Biochar and urease inhibitor mitigate NH3 and N2O emissions and improve wheat yield in a urea fertilized alkaline soil

Scientific Reports ◽

10.1038/s41598-021-96771-0 ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Khadim Dawar ◽

Shah Fahad ◽

M. M. R. Jahangir ◽

Iqbal Munir ◽

Syed Sartaj Alam ◽

...

Keyword(s):

Nitrous Oxide ◽

Grain Yield ◽

Block Design ◽

N Uptake ◽

Nitrous Oxide Emissions ◽

N2o Emissions ◽

Urease Inhibitor ◽

Alkaline Soil ◽

Total N ◽

N Assimilation

AbstractIn this study, we explored the role of biochar (BC) and/or urease inhibitor (UI) in mitigating ammonia (NH3) and nitrous oxide (N2O) discharge from urea fertilized wheat cultivated fields in Pakistan (34.01°N, 71.71°E). The experiment included five treatments [control, urea (150 kg N ha−1), BC (10 Mg ha−1), urea + BC and urea + BC + UI (1 L ton−1)], which were all repeated four times and were carried out in a randomized complete block design. Urea supplementation along with BC and BC + UI reduced soil NH3 emissions by 27% and 69%, respectively, compared to sole urea application. Nitrous oxide emissions from urea fertilized plots were also reduced by 24% and 53% applying BC and BC + UI, respectively, compared to urea alone. Application of BC with urea improved the grain yield, shoot biomass, and total N uptake of wheat by 13%, 24%, and 12%, respectively, compared to urea alone. Moreover, UI further promoted biomass and grain yield, and N assimilation in wheat by 38%, 22% and 27%, respectively, over sole urea application. In conclusion, application of BC and/or UI can mitigate NH3 and N2O emissions from urea fertilized soil, improve N use efficiency (NUE) and overall crop productivity.

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