Ammonia emission modelling and reduced sampling strategies in cage-based laying hen facilities

Rosa, E.; Mosquera, J.; Arriaga, H.; Montalvo, Gemma; Merino, P.

doi:10.1016/j.biosystemseng.2021.02.002

Cited by 5 publications

(5 citation statements)

References 17 publications

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“…For both T S , a negative correlation was found between NH 3 and T CA , with higher values for 26 • C (−0.80) than for 25 • C (−0.29), which is in agreement with [20]. This effect can be explained by the ventilation rates [32].…”

Section: Correlations Between the Study Variables For T S 26 And 25 • Csupporting

confidence: 68%

“…Actually, gas concentrations vary according to the airflow pattern and depend greatly on the ventilation system, among other variables [4,20,21], i.e., the temperature, the feeding of animals, their metabolism and the housing system. Ammonia concentrations can be measured with a variety of sensors, among which semiconductor, infrared, photoacoustic and electrochemical detectors.…”

Section: Introductionmentioning

confidence: 99%

“…In addition, the effect of sensor location is affected by the time and duration of measurements due to variations in the level of animal activity through time across different life stages [22] and to daily and seasonal variations in gas concentrations [17,23]. As a result, considerable efforts have been made to: (1) understand the mechanisms of ammonia emission [4,20,24], (2) solve measurement accuracy issues [19,22,25] and (3) reduce ammonia emissions [22,26]. Because current knowledge and measurement techniques can only provide reasonable estimates of ammonia emissions, there is a need for improved measurement techniques that allow for more accurate emission rate inventories [22].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Linear Models for the Prediction of Animal Zone Ammonia in a Weaned Piglet Building

Arango

Besteiro²,

Ortega

et al. 2021

Agronomy

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Measuring ammonia inside livestock buildings poses many challenges that hinder the incorporation of this variable into environmental control systems. The aim of this study was to measure various microclimate variables inside a weaned piglet building and analyse their interactions with NH3 concentrations for setpoint temperatures of 26 and 25 °C, in order to control NH3 concentrations based on other easily measurable variables. The experimental test was conducted on a conventional farm in Northwest Spain. NH3 concentrations in the animal zone were best correlated with CO2 concentrations in the animal zone (R = 0.91 and R = 0.55) and velocity of air extracted through the fan (R = 0.72 and R = 0.65) for setpoint temperatures of 26 and 25 °C, respectively. Similarly, strong correlations were found with relative humidity in the animal zone and temperature of inlet air. Because NH3 concentration in the animal zone is related to the performance of the ventilation system, strong positive correlations were found between NH3 concentration and temperature of inlet air whereas negative correlations were found between NH3 concentration and ventilation rates. Linear regression models based on CO2 concentrations in the animal zone and temperature of inlet air are recommended, because they provide a good fit for both setpoint temperatures using variables that can be readily measured.

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Section: Correlations Between the Study Variables For T S 26 And 25 • Csupporting

confidence: 68%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Linear Models for the Prediction of Animal Zone Ammonia in a Weaned Piglet Building

Arango

Besteiro²,

Ortega

et al. 2021

Agronomy

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“…The INNOVA 1412 has been available for barn measurements longer than the Polytron transmitters. The photoacoustic gas analyser has been used to measure NH3 and other gases in various animal species such as the measurement of the NH3 concentration in broiler housing (Adler et al, 2021), laying hen facilities (Rosa et al, 2021;Alberdi et al, 2016), fattening pig barns (Krommweh et al, 2021;Lengling et al, 2020;Hansen et al, 2014), mating and gestating sows (Kriz et al, 2021) and cattle (Place et al, 2011). A comparative study (at the laboratory level) of the two measuring devices is not yet known.…”

Section: Introductionmentioning

confidence: 99%

Assessment of ammonia sensors and photoacoustic measurement systems using a gas calibration unit

Jasmund

Schmithausen

Krommweh

et al. 2022

Computers and Electronics in Agriculture

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“…Therefore, it is crucial to understand and model the ammonia emissions in poultry houses so as to provide information to develop appropriate mitigation and management strategies. Much work had been done to predict ammonia release from manure [ 13 , 14 , 15 , 16 , 17 ], and several types of models were developed in the literature, including statistical models [ 18 , 19 ], balance models [ 20 , 21 ], and process-based models [ 22 , 23 ]. More recently, Tong et al [ 24 ] developed a mechanistic model, which was based on the fundamental understanding of physical and biochemical processes of ammonia emissions from manure, to estimate the

emissions rate (

, mg

) from laying hen manure.…”

Section: Introductionmentioning

confidence: 99%

New Insights into the Hourly Manure Coverage Proportion on the Manure Belt in a Typical Layer House for Accurate Ammonia Emission Modeling

Yang

et al. 2021

Animals

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The main advantage of having livestock, for example, the laying hens, in a controlled environment is that the optimum growth conditions can be achieved with accuracy. The indoor air temperature, humidity, gases concentration, etc., would significantly affect the animal performance, thus should be maintained within an acceptable range. In order to achieve the goals of precision poultry farming, various models have been developed by researchers all over the world to estimate the hourly indoor environmental parameters so as to provide decision suggestions. However, a key parameter of hourly manure area in the poultry house was missing in the literature to predict the ammonia emission using the recently developed mechanistic model. Therefore, in order to fill the gap of the understanding of hourly manure coverage proportion and area on the manure belt, experimental measurements were performed in the present study using laying hens from 10 weeks age to 30 weeks age. For each test, six polypropylene (pp) plates were applied to collect the manure dropped by the birds every hour, and photographs of the plates were taken at the same time using a pre-fixed camera. Binary images were then produced based on the color pictures to determine the object coverage proportion. It was demonstrated that for laying hens of stocking density around 14 birds/m2, the manure coverage proportion at the 24th hour after the most recent manure removal was about 60%, while the value was approximately 82% at the 48th hour. Meanwhile, for laying hens at different ages, the hourly increment of manure coverage proportion showed a similar pattern with four distinct stages within 48 h. The statistical analyses demonstrated no significant correlation between the hourly increment of manure weight and the hourly increment of manure coverage proportion. Finally, prediction models for estimating the hourly manure coverage proportion on the manure belt in typical laying hen houses were provided.

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Ammonia emission modelling and reduced sampling strategies in cage-based laying hen facilities

Cited by 5 publications

References 17 publications

Linear Models for the Prediction of Animal Zone Ammonia in a Weaned Piglet Building

Linear Models for the Prediction of Animal Zone Ammonia in a Weaned Piglet Building

Assessment of ammonia sensors and photoacoustic measurement systems using a gas calibration unit

New Insights into the Hourly Manure Coverage Proportion on the Manure Belt in a Typical Layer House for Accurate Ammonia Emission Modeling

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