Effect of anaerobic digestion on odor and ammonia emission from land-applied cattle manure.

High ammonia (NH) and odor emission can occur after land application of liquid animal manure. This study was aimed at evaluating NH loss and odor nuisance after field application of cattle manure and how it is affected by two anaerobic digestion strategies: i) digestion of cattle manure alone and ii) digestion with catch crops and dilution by water. A system of dynamic chambers with online measurements of NH and odorous compounds (summarized as odor activity value, OAV) was used.

Effect of storage and field acidification on emissions of NH, NMVOC, and odour from field applied slurry in winter conditions.

Land spreading of liquid animal manure (slurry) is a major source of atmospheric emissions. Ammonia (NH) emission is of concern, as it is one of the main contributors to ambient air pollution and nitrogen deposition. Storage and field acidification of the slurry prior to application is used to mitigate NH emission, but the effect of acidification on emissions of odorous non-methane volatile organic compounds (NMVOC) has not been investigated, and there is a scarcity of data investigating the effect of field acidification.

Analysis of the effect of air temperature on ammonia emission from band application of slurry.

Field application of liquid animal manure (slurry) is a significant source of ammonia (NH) emission to the atmosphere. It is well supported by theory and previous studies that air temperature effects NH flux from field applied slurry. The objectives of this study was to statistically model the response of temperature at the time of application on cumulative NH emission.

Low-Cost Fluorescence Sensor for Ammonia Measurement in Livestock Houses.

Measurements of ammonia with inexpensive and reliable sensors are necessary to obtain information about e.g., ammonia emissions.

Emissions of NMVOC and HS from field-applied manure measured by PTR-TOF-MS and wind tunnels.

Field application of animal manure is a source of volatile organic compounds (VOC) and hydrogen sulfide (HS) emission that contribute to air pollution and odor nuisance in local surroundings. In this study the non-methane volatile organic compounds (NMVOC) and HS emission and odor activity dynamics over time after field application of pig and cattle manure were investigated. Furthermore, three different application techniques, trailing hoses, trailing shoes, and trailing hoses applying manure 20 cm above canopy, was compared.

Data on initial leaf P concentrations and final dry matter yields of silage maize in response to row-injected cattle slurry.

This article displays a dataset obtained in a field trial conducted in 2016 on a sandy loam and a coarse sandy soil, Denmark. Leaf phosphorus (P) and nitrogen (N) concentrations at the five-leaf stage (V5) and final dry matter (DM) yields of silage maize were determined in response to seven treatments with placed slurry below the maize row. Two row-injection methods combined with slurry acidification or addition of a nitrification inhibitor were tested.

Real-time quantification of emissions of volatile organic compounds from land spreading of pig slurry measured by PTR-MS and wind tunnels.

Volatile organic compounds (VOC) and hydrogen sulfide are emitted from land spreading of manure slurry to the atmosphere and contribute to odour nuisance, particle formation and tropospheric ozone formation. Data on emissions is almost non-existing partly due to lack of suitable quantitative methods for measuring emissions in full scale. Here we present a method based on application of wind tunnels for simulation of air exchange combined with the use of online mass spectrometry (PTR-MS).

Contribution of livestock HS to total sulfur emissions in a region with intensive animal production.

Hydrogen sulfide (HS) from agricultural sources is generally not included in sulfur emission estimates even though HS is the major sulfur compound emitted from livestock production. Here we show that in a country with intensive livestock production (Denmark), agriculture constitute the most important sulfur source category (~49% of all sources of sulfur dioxide), exceeding both the production industry and energy categories. The analysis is based on measurements of HS using proton-transfer-reaction mass spectrometry.

NPK NMR Sensor: Online Monitoring of Nitrogen, Phosphorus, and Potassium in Animal Slurry.

Knowledge of the actual content of nitrogen, phosphorus, and potassium (NPK) in animal slurry is highly important to optimize crop production and avoid environmental pollution when slurry is spread on agricultural fields. Here, we present a mobile, low-field nuclear magnetic resonance (NMR) sensor suitable for online monitoring of the NPK content in animal slurry as an alternative to crude estimates or tedious nonspecific, off-site laboratory analysis. The sensor is based on (14)N, (17)O, (31)P, and (39)K NMR in a digital NMR instrument equipped with a 1.

Application of PTR-MS for measuring odorant emissions from soil application of manure slurry.

Odorous volatile organic compounds (VOC) and hydrogen sulfide (H2S) are emitted together with ammonia (NH3) from manure slurry applied as a fertilizer, but little is known about the composition and temporal variation of the emissions. In this work, a laboratory method based on dynamic flux chambers packed with soil has been used to measure emissions from untreated pig slurry and slurry treated by solid-liquid separation and ozonation. Proton-transfer-reaction mass spectrometry (PTR-MS) was used to provide time resolved data for a range of VOC, NH3 and H2S.