GFS Poultry Protect - Green poultry house sanitizer & litter ammendmentGlobal Future Solutions
GFS has been announced as a Global Top 30 company for 2014 in the Global Cleantech Cluster Awards.
Finishing in the Top 3 in our sector, Food & Urban Agriculture, we were nominated for your product for the poultry industry, GFS Poultry Protect
Development of an Acid Scrubber for Reducing Ammonia Emissions from Animal Re...LPE Learning Center
Proceedings available at: http://www.extension.org/67663
Recent research has shown that over half of nitrogen excreted by chickens is lost into the atmosphere via ammonia volatilization before the litter is removed from poultry houses. Large quantities of particulate matter and volatile organic compounds (VOCs) are also emitted from animal rearing facilities. During the past decade we have developed and patented an acid scrubber for capturing ammonia, VOCs and dust from air exhausted from poultry and swine barns. The objectives of this project were; (1) to re-design the scrubber to improve the ammonia removal efficacy, (2) conduct full-scale testing of the scrubber under controlled conditions at various ventilation rates, (3) evaluate the cost, practicality and efficacy of various acids for scrubbing ammonia, and (4) install scrubbers on exhaust fans of poultry houses located in Virginia and Arkansas and measure the efficiency of ammonia removal from the exhaust air. The efficiency of ammonia removal by the scrubber varied from 55-95%, depending on the type of acid used, air flow rate, and the internal scrubber configuration. This technology could potentially result in the capture of a large fraction of the N lost from AFOs, while simultaneously reducing emissions of bacteria, dust, and odors, which would improve the social, economic, and environmental sustainability of poultry and swine production.
Utilizing Acid-tolerant Nitrifying Bacteria to Generate the Acidity Needed to...LPE Learning Center
The full proceedings paper is at: www.extension.org/72846
Although acid scrubbers can capture ammonia (NH3) in exhaust air from animal facilities, they are not cost-effective because the nitrogen (N) captured has roughly the same value as the acid. The objective of this work was to develop an NH3 scrubber that uses acid-tolerant nitrifying bacteria to generate the acid needed for scrubbing NH3. Nitrification is an acid-forming process, with two moles of acid formed for each mole of ammonium (NH4) nitrified. A laboratory microcosm that held a clay substrate was inoculated with sewage from the aeration basin of a local wastewater plant. A feed solution containing ammonium chloride (NH4Cl) and sodium bicarbonate (NaHCO3) was then pumped through the system. Ammonium, nitrate (NO3) and pH were measured periodically in the influent and effluent. After a few weeks, NO3- analysis indicated >95% of the NH4 was being nitrified to NO3-, at which point the NH4Cl and NaHCO3 concentrations were doubled. This process was repeated until the feed solution contained 4 g NH4Cl/L. Then the NaHCO3 was reduced over time so that the molar ratio of base to potential acidity (from nitrification of NH4) was less than one, causing the effluent pH to decrease. Even though the influent pH was 8.2, the effluent pH was reduced to 4.2 over time, indicating acid-tolerant nitrifying bacteria were at work. Clay substrate from the microcosm was then used to inoculate slats of an NH4 scrubber with these bacteria at a commercial broiler farm in NW AR, by encasing the clay substrate in mesh that was attached to the slats. Within weeks, bacteria slime mats formed on the slats and nitrification of NH3 and acid generation began. Over 20 kg of N were captured in 35 days, about half of which was NO3-. This technology has the potential to make the use of NH4 scrubbers a cost-effective best management practice.
Development of a New Manure Amendment for Reducing Ammonia Volatilization and...LPE Learning Center
The full proceedings paper is at: http://www.extension.org/72844
Adding alum to animal manures greatly reduces ammonia (NH3) emissions and phosphorus (P) runoff. Improvements in poultry production, lower energy costs and environmental benefits from alum have led to widespread use by the poultry industry. Over one billion broilers are grown with alum in the U.S. each year. However, the price of alum has increased dramatically, creating a need for cheaper products that control NH3 and P losses. The goal of this research was to develop an inexpensive manure amendment that is as effective as alum in reducing NH3 volatilization and P runoff from poultry litter. Sixteen manure amendments were created using various ratios of alum mud, bauxite ore, sulfuric acid, liquid alum and water. Alum mud is the waste product that is left over from the manufacture of alum when made by mixing sulfuric acid with bauxite. A laboratory NH3 volatilization study was conducted using a total of 11 treatments; untreated poultry litter, litter treated with liquid or dry alum and litter treated with eight of the new mixtures. All amendments tested resulted in significantly lower NH3 losses than the controls. Ammonia losses with dry and liquid alum were reduced by 86% and 75%, respectively. Ammonia losses with the eight new amendments ranged from 62 to 73% less than controls and were not significantly different from liquid alum and the three most effective mixtures were not significantly different from dry alum. All of the amendments also significantly reduced water extractable P (WEP); three of which resulted in significantly lower WEP than with dry alum. The most promising products were mixtures of alum mud, bauxite, and sulfuric acid. The potential impact of these products could be enormous, since they could be produced for less than half the price of alum, while being equally effective at reducing both NH3 emissions and P runoff.
Litter Generated Ammonia Captured by Activated Carbon Derived from Broiler Li...LPE Learning Center
http://www.extension.org/67575 In 2011, the production rate of broilers was 8.6 billion with a value of $23.2 billion (USDA 2012). Both CERCLA and EPCRA have reporting requirements for ammonia (NH3) of 100 lb of NH3/d or 18.3 tons/yr, a level that may affect large animal production facilities (NRC 2003). Although USEPA (2009) has provided an exemption for animal waste producing farms under CERCLA for reporting hazardous air emissions, it is expected that this exemption will be revoked once valid methodologies are established for monitoring. Two of the 24 sites in the NAEMS monitoring study reported similar NH3 emissions of 3.6 – 5.3 tons of NH3 per house per year (Burns et al. 2009, Heber 2010). Emissions of this level indicate a need for developing technologies that can reduce the NH3 levels produced by broiler operations. This research is focused on the use of broiler litter as activated carbon (BAC) to reduce aerial NH3 generated by litter, an opportunity to not only reuse the manure, but also treat the emissions from or within broiler houses. The objective of this study was to evaluate the efficacy of BAC to remove NH3 volatilized from litter samples in a laboratory acid-trap system. Preliminary studies using NH3/air mixture indicated that the BAC capacity to adsorb NH3 was approximately double that of Vapure 612, a commercial carbon. In the litter emission study, the BAC and Vapure performance was comparable. Breakthrough for both carbons occurred within 14 hours of the test start. At the end of the 3 day test, the NH3 emission for BAC was 75% of the litter only control, whereas, the Vapure emission was 64% of the control. The results of the study demonstrate the potential for a cyclical waste utilization strategy in using broiler litter activated carbon to capture NH3 volatilized from litter.
GFS Poultry Protect - Green poultry house sanitizer & litter ammendmentGlobal Future Solutions
GFS has been announced as a Global Top 30 company for 2014 in the Global Cleantech Cluster Awards.
Finishing in the Top 3 in our sector, Food & Urban Agriculture, we were nominated for your product for the poultry industry, GFS Poultry Protect
Development of an Acid Scrubber for Reducing Ammonia Emissions from Animal Re...LPE Learning Center
Proceedings available at: http://www.extension.org/67663
Recent research has shown that over half of nitrogen excreted by chickens is lost into the atmosphere via ammonia volatilization before the litter is removed from poultry houses. Large quantities of particulate matter and volatile organic compounds (VOCs) are also emitted from animal rearing facilities. During the past decade we have developed and patented an acid scrubber for capturing ammonia, VOCs and dust from air exhausted from poultry and swine barns. The objectives of this project were; (1) to re-design the scrubber to improve the ammonia removal efficacy, (2) conduct full-scale testing of the scrubber under controlled conditions at various ventilation rates, (3) evaluate the cost, practicality and efficacy of various acids for scrubbing ammonia, and (4) install scrubbers on exhaust fans of poultry houses located in Virginia and Arkansas and measure the efficiency of ammonia removal from the exhaust air. The efficiency of ammonia removal by the scrubber varied from 55-95%, depending on the type of acid used, air flow rate, and the internal scrubber configuration. This technology could potentially result in the capture of a large fraction of the N lost from AFOs, while simultaneously reducing emissions of bacteria, dust, and odors, which would improve the social, economic, and environmental sustainability of poultry and swine production.
Utilizing Acid-tolerant Nitrifying Bacteria to Generate the Acidity Needed to...LPE Learning Center
The full proceedings paper is at: www.extension.org/72846
Although acid scrubbers can capture ammonia (NH3) in exhaust air from animal facilities, they are not cost-effective because the nitrogen (N) captured has roughly the same value as the acid. The objective of this work was to develop an NH3 scrubber that uses acid-tolerant nitrifying bacteria to generate the acid needed for scrubbing NH3. Nitrification is an acid-forming process, with two moles of acid formed for each mole of ammonium (NH4) nitrified. A laboratory microcosm that held a clay substrate was inoculated with sewage from the aeration basin of a local wastewater plant. A feed solution containing ammonium chloride (NH4Cl) and sodium bicarbonate (NaHCO3) was then pumped through the system. Ammonium, nitrate (NO3) and pH were measured periodically in the influent and effluent. After a few weeks, NO3- analysis indicated >95% of the NH4 was being nitrified to NO3-, at which point the NH4Cl and NaHCO3 concentrations were doubled. This process was repeated until the feed solution contained 4 g NH4Cl/L. Then the NaHCO3 was reduced over time so that the molar ratio of base to potential acidity (from nitrification of NH4) was less than one, causing the effluent pH to decrease. Even though the influent pH was 8.2, the effluent pH was reduced to 4.2 over time, indicating acid-tolerant nitrifying bacteria were at work. Clay substrate from the microcosm was then used to inoculate slats of an NH4 scrubber with these bacteria at a commercial broiler farm in NW AR, by encasing the clay substrate in mesh that was attached to the slats. Within weeks, bacteria slime mats formed on the slats and nitrification of NH3 and acid generation began. Over 20 kg of N were captured in 35 days, about half of which was NO3-. This technology has the potential to make the use of NH4 scrubbers a cost-effective best management practice.
Development of a New Manure Amendment for Reducing Ammonia Volatilization and...LPE Learning Center
The full proceedings paper is at: http://www.extension.org/72844
Adding alum to animal manures greatly reduces ammonia (NH3) emissions and phosphorus (P) runoff. Improvements in poultry production, lower energy costs and environmental benefits from alum have led to widespread use by the poultry industry. Over one billion broilers are grown with alum in the U.S. each year. However, the price of alum has increased dramatically, creating a need for cheaper products that control NH3 and P losses. The goal of this research was to develop an inexpensive manure amendment that is as effective as alum in reducing NH3 volatilization and P runoff from poultry litter. Sixteen manure amendments were created using various ratios of alum mud, bauxite ore, sulfuric acid, liquid alum and water. Alum mud is the waste product that is left over from the manufacture of alum when made by mixing sulfuric acid with bauxite. A laboratory NH3 volatilization study was conducted using a total of 11 treatments; untreated poultry litter, litter treated with liquid or dry alum and litter treated with eight of the new mixtures. All amendments tested resulted in significantly lower NH3 losses than the controls. Ammonia losses with dry and liquid alum were reduced by 86% and 75%, respectively. Ammonia losses with the eight new amendments ranged from 62 to 73% less than controls and were not significantly different from liquid alum and the three most effective mixtures were not significantly different from dry alum. All of the amendments also significantly reduced water extractable P (WEP); three of which resulted in significantly lower WEP than with dry alum. The most promising products were mixtures of alum mud, bauxite, and sulfuric acid. The potential impact of these products could be enormous, since they could be produced for less than half the price of alum, while being equally effective at reducing both NH3 emissions and P runoff.
Litter Generated Ammonia Captured by Activated Carbon Derived from Broiler Li...LPE Learning Center
http://www.extension.org/67575 In 2011, the production rate of broilers was 8.6 billion with a value of $23.2 billion (USDA 2012). Both CERCLA and EPCRA have reporting requirements for ammonia (NH3) of 100 lb of NH3/d or 18.3 tons/yr, a level that may affect large animal production facilities (NRC 2003). Although USEPA (2009) has provided an exemption for animal waste producing farms under CERCLA for reporting hazardous air emissions, it is expected that this exemption will be revoked once valid methodologies are established for monitoring. Two of the 24 sites in the NAEMS monitoring study reported similar NH3 emissions of 3.6 – 5.3 tons of NH3 per house per year (Burns et al. 2009, Heber 2010). Emissions of this level indicate a need for developing technologies that can reduce the NH3 levels produced by broiler operations. This research is focused on the use of broiler litter as activated carbon (BAC) to reduce aerial NH3 generated by litter, an opportunity to not only reuse the manure, but also treat the emissions from or within broiler houses. The objective of this study was to evaluate the efficacy of BAC to remove NH3 volatilized from litter samples in a laboratory acid-trap system. Preliminary studies using NH3/air mixture indicated that the BAC capacity to adsorb NH3 was approximately double that of Vapure 612, a commercial carbon. In the litter emission study, the BAC and Vapure performance was comparable. Breakthrough for both carbons occurred within 14 hours of the test start. At the end of the 3 day test, the NH3 emission for BAC was 75% of the litter only control, whereas, the Vapure emission was 64% of the control. The results of the study demonstrate the potential for a cyclical waste utilization strategy in using broiler litter activated carbon to capture NH3 volatilized from litter.
How does the air quality of the pig barns affect the pigs.docxfeed arshine
Arshine Feed Biotech Co.,LTD. (Arshine Feed) is the wholly owned subsidiary of Arshine Group. Our products cover a wide range of feed additives, such as Amino acids, Vitamins, Probiotics, Enzymes, Antiseptic, Antioxidant, Acidifier, Neutraceuticals and Coloring Agents etc. The company is committed to improving the nutritional intake for Broilers, Layers, Swines, Ruminants as well as fish-prawn-crab through scientific breeding programs and formulations.
source:https://www.arshinefeed.com/
The International Journal of Engineering & Science is aimed at providing a platform for researchers, engineers, scientists, or educators to publish their original research results, to exchange new ideas, to disseminate information in innovative designs, engineering experiences and technological skills. It is also the Journal's objective to promote engineering and technology education. All papers submitted to the Journal will be blind peer-reviewed. Only original articles will be published.
The papers for publication in The International Journal of Engineering& Science are selected through rigorous peer reviews to ensure originality, timeliness, relevance, and readability.
Impact of Improved Aeration on Decomposition Rate of Enriched Compostijtsrd
Agricultural activities tend to generate a substantial volume of animal and crop residues. Composting is the most economical and ecologically sustainable option to manage farmyard waste. However, it takes approximately three months to complete decomposition and contains lower plant nutrient percentages than inorganic fertilisers. This study aimed to reduce the decomposition time and improve the nutrient content of compost. Aerobic decomposition was enhanced by aeration inside the pile using a blower with 0.5 l min kg airflow. Paddy straw, poultry manure, goat manure, cattle manure and paddy husk ash were mixed in 3 1 1 1 1 ratio respectively as the raw materials and 3 of Eppawala Rock Phosphate was added to the mixture in weight basis. Six piles 150 X 100 X 80 cm were prepared, and three piles were aerated for six hours per day while other three piles were left to decompose under the ambient condition as the control. According to the results, aerated and control piles took 35 days and 65 days to complete the decomposition. Total N, available P, exchangeable K, C N ratio, pH, EC and CEC were analysed in compost samples from aerated after 35 days and controls, and the results were, 20.5 g kg 1, 1.8 g kg 1, 10.4 g kg 1, 7, 8.8, 4.3 mS cm 1, 19.3 cmol kg 1 and 17.8 g kg 1, 1.5 g kg 1, 9.9 g kg 1, 8.5, 8.8, 3.64 mS cm 1, 21.3 cmol kg 1 respectively. Data were analysed using SAS 9.0 software with a 95 confidence interval. The results revealed a significant increment in total N, exchangeable K, C N ratio, EC and CEC in aerated piles compared to controls. And the nutrient composition of both methods was significantly higher than the commercial compost. Therefore, it can be concluded that decomposition time can be effectively reduced and the nutrient level can be increased by artificial aeration and nutrient enrichment, respectively. However, further studies are recommended to study the economic feasibility. D. M. S. H. Dissanayaka | V. P. T. Dhananjaya | E. J. Kosgollegedara | S. Karthigayini "Impact of Improved Aeration on Decomposition Rate of Enriched Compost" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-5 | Issue-2 , February 2021, URL: https://www.ijtsrd.com/papers/ijtsrd38557.pdf Paper Url: https://www.ijtsrd.com/engineering/agricultural-engineering/38557/impact-of-improved-aeration-on-decomposition-rate-of-enriched-compost/d-m-s-h-dissanayaka
Energy Recovery of Biomass: Study Comparative Experimental of Fixed Bed Combu...AJSERJournal
Energy recovery of biomass is considered as an important source of energy. The main objective of this
experimental study is to validate the use of olive pomace as an alternative fuel using a comparison with that of wood.
Therefore a biomass boiler was designed and fabricated based on two separate compartments. Experiments tests
showed that the average temperature in the boiler is around 700 °C for pomace and 670 °C for sawdust with variations
up to 100 °C depending on fuel supply. In this study, the temperature distributions within of the combustion chamber of
pomace and sawdust of wood are presented, evaluated and analyzed. The removal of combustion gas is produced via a
probe of a multi-gas analyzer placed at the smoke outlet. Analysis of combustion gases such as NO, CO, CO2 and O2 are
illustrated and discussed. The results showed that low values of nitrogen oxides NOx have been observed, well below
standard limit values and absence SOx
Energy Recovery of Biomass: Study Comparative Experimental of Fixed Bed Combu...AJSERJournal
Energy recovery of biomass is considered as an important source of energy. The main objective of this
experimental study is to validate the use of olive pomace as an alternative fuel using a comparison with that of wood.
Therefore a biomass boiler was designed and fabricated based on two separate compartments. Experiments tests
showed that the average temperature in the boiler is around 700 °C for pomace and 670 °C for sawdust with variations
up to 100 °C depending on fuel supply. In this study, the temperature distributions within of the combustion chamber of
pomace and sawdust of wood are presented, evaluated and analyzed. The removal of combustion gas is produced via a
probe of a multi-gas analyzer placed at the smoke outlet. Analysis of combustion gases such as NO, CO, CO2 and O2 are
illustrated and discussed. The results showed that low values of nitrogen oxides NOx have been observed, well below
standard limit values and absence SOx.
The objective of this pilot study was to detect whether CO2- enriched high expansion foam has the potential to be an acceptable and efficient method for emergency killing of poultry. When we take into account behavioural parameters, measurements of heart rate and pathological data, it is our conclusion that CO2 foam is a potentially acceptable killing method for laying hens.
How does the air quality of the pig barns affect the pigs.docxfeed arshine
Arshine Feed Biotech Co.,LTD. (Arshine Feed) is the wholly owned subsidiary of Arshine Group. Our products cover a wide range of feed additives, such as Amino acids, Vitamins, Probiotics, Enzymes, Antiseptic, Antioxidant, Acidifier, Neutraceuticals and Coloring Agents etc. The company is committed to improving the nutritional intake for Broilers, Layers, Swines, Ruminants as well as fish-prawn-crab through scientific breeding programs and formulations.
source:https://www.arshinefeed.com/
The International Journal of Engineering & Science is aimed at providing a platform for researchers, engineers, scientists, or educators to publish their original research results, to exchange new ideas, to disseminate information in innovative designs, engineering experiences and technological skills. It is also the Journal's objective to promote engineering and technology education. All papers submitted to the Journal will be blind peer-reviewed. Only original articles will be published.
The papers for publication in The International Journal of Engineering& Science are selected through rigorous peer reviews to ensure originality, timeliness, relevance, and readability.
Impact of Improved Aeration on Decomposition Rate of Enriched Compostijtsrd
Agricultural activities tend to generate a substantial volume of animal and crop residues. Composting is the most economical and ecologically sustainable option to manage farmyard waste. However, it takes approximately three months to complete decomposition and contains lower plant nutrient percentages than inorganic fertilisers. This study aimed to reduce the decomposition time and improve the nutrient content of compost. Aerobic decomposition was enhanced by aeration inside the pile using a blower with 0.5 l min kg airflow. Paddy straw, poultry manure, goat manure, cattle manure and paddy husk ash were mixed in 3 1 1 1 1 ratio respectively as the raw materials and 3 of Eppawala Rock Phosphate was added to the mixture in weight basis. Six piles 150 X 100 X 80 cm were prepared, and three piles were aerated for six hours per day while other three piles were left to decompose under the ambient condition as the control. According to the results, aerated and control piles took 35 days and 65 days to complete the decomposition. Total N, available P, exchangeable K, C N ratio, pH, EC and CEC were analysed in compost samples from aerated after 35 days and controls, and the results were, 20.5 g kg 1, 1.8 g kg 1, 10.4 g kg 1, 7, 8.8, 4.3 mS cm 1, 19.3 cmol kg 1 and 17.8 g kg 1, 1.5 g kg 1, 9.9 g kg 1, 8.5, 8.8, 3.64 mS cm 1, 21.3 cmol kg 1 respectively. Data were analysed using SAS 9.0 software with a 95 confidence interval. The results revealed a significant increment in total N, exchangeable K, C N ratio, EC and CEC in aerated piles compared to controls. And the nutrient composition of both methods was significantly higher than the commercial compost. Therefore, it can be concluded that decomposition time can be effectively reduced and the nutrient level can be increased by artificial aeration and nutrient enrichment, respectively. However, further studies are recommended to study the economic feasibility. D. M. S. H. Dissanayaka | V. P. T. Dhananjaya | E. J. Kosgollegedara | S. Karthigayini "Impact of Improved Aeration on Decomposition Rate of Enriched Compost" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-5 | Issue-2 , February 2021, URL: https://www.ijtsrd.com/papers/ijtsrd38557.pdf Paper Url: https://www.ijtsrd.com/engineering/agricultural-engineering/38557/impact-of-improved-aeration-on-decomposition-rate-of-enriched-compost/d-m-s-h-dissanayaka
Energy Recovery of Biomass: Study Comparative Experimental of Fixed Bed Combu...AJSERJournal
Energy recovery of biomass is considered as an important source of energy. The main objective of this
experimental study is to validate the use of olive pomace as an alternative fuel using a comparison with that of wood.
Therefore a biomass boiler was designed and fabricated based on two separate compartments. Experiments tests
showed that the average temperature in the boiler is around 700 °C for pomace and 670 °C for sawdust with variations
up to 100 °C depending on fuel supply. In this study, the temperature distributions within of the combustion chamber of
pomace and sawdust of wood are presented, evaluated and analyzed. The removal of combustion gas is produced via a
probe of a multi-gas analyzer placed at the smoke outlet. Analysis of combustion gases such as NO, CO, CO2 and O2 are
illustrated and discussed. The results showed that low values of nitrogen oxides NOx have been observed, well below
standard limit values and absence SOx
Energy Recovery of Biomass: Study Comparative Experimental of Fixed Bed Combu...AJSERJournal
Energy recovery of biomass is considered as an important source of energy. The main objective of this
experimental study is to validate the use of olive pomace as an alternative fuel using a comparison with that of wood.
Therefore a biomass boiler was designed and fabricated based on two separate compartments. Experiments tests
showed that the average temperature in the boiler is around 700 °C for pomace and 670 °C for sawdust with variations
up to 100 °C depending on fuel supply. In this study, the temperature distributions within of the combustion chamber of
pomace and sawdust of wood are presented, evaluated and analyzed. The removal of combustion gas is produced via a
probe of a multi-gas analyzer placed at the smoke outlet. Analysis of combustion gases such as NO, CO, CO2 and O2 are
illustrated and discussed. The results showed that low values of nitrogen oxides NOx have been observed, well below
standard limit values and absence SOx.
The objective of this pilot study was to detect whether CO2- enriched high expansion foam has the potential to be an acceptable and efficient method for emergency killing of poultry. When we take into account behavioural parameters, measurements of heart rate and pathological data, it is our conclusion that CO2 foam is a potentially acceptable killing method for laying hens.
Similar to Poultry Housing And Manure Management Systems (20)
LABORATORY MANUAL ON
QUALITY CONTROL OF ANIMAL FEEDS by Dr. G. DEVEGOWDA, PROFESSOR & HEAD, DEPARTMENT OF POULTRY SCIENCE
UNIVERSITY OF AGRI. SCIENCES
HEBBAL, BANGALORE
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https://alandix.com/academic/papers/synergy2024-epistemic/
As machine learning integrates deeper into human-computer interactions, the concept of epistemic interaction emerges, aiming to refine these interactions to enhance system adaptability. This approach encourages minor, intentional adjustments in user behaviour to enrich the data available for system learning. This paper introduces epistemic interaction within the context of human-system communication, illustrating how deliberate interaction design can improve system understanding and adaptation. Through concrete examples, we demonstrate the potential of epistemic interaction to significantly advance human-computer interaction by leveraging intuitive human communication strategies to inform system design and functionality, offering a novel pathway for enriching user-system engagements.
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My and Rik Marselis slides at 30.5.2024 DASA Connect conference. We discuss about what is testing, then what is agile testing and finally what is Testing in DevOps. Finally we had lovely workshop with the participants trying to find out different ways to think about quality and testing in different parts of the DevOps infinity loop.
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- These are slides of the talk given at IEEE International Conference on Software Testing Verification and Validation Workshop, ICSTW 2022.
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Poultry Housing And Manure Management Systems
1. Poultry Housing and Manure Management Systems :
Recent Developments in Italy as Regards Ammonia Emissions
Bâtiments avicoles et systèmes de gestion des déjections : développements
récents en Italie, en lien avec les émissions d’ammoniac.
F. da Borso, R. Chiumenti
University of Udine, Department of Crop Sciences and Agricultural Technologies,
Section of Agricultural Engineering, Via delle Scienze, 208 - 33100 Udine, Italy
E-mail : Francesco.daborso@dputa.uniud.it
Abstract
Laying hen and broiler keeping systems strongly developed during the last years,
aiming to the reduction of environmental impacts (especially of emissions in
atmosphere) and to make easier poultry manure management. As concerns broiler
structures, no advances technologies are applied, but simple management
systems can significantly reduce ammonia and odour emissions ; to give an
example, the adoption of an adequate height of litter layer and the use drop-
collecting drinking nipples allowed a reduction of ammonia level to 6 ppm, in
respect to about 20 ppm of the « traditional » system tested. As concerns the
laying hen compartment, several studies on the vertical batteries with manure
drying on belts were carried out, showing a sufficiently improved management of
poultry manure. Therefore, the possibility of reaching higher levels in dry matter of
manure must be closely examined.
Keywords : poultry manure, ammonia and odour emission, drying, composting.
Résumé
De nombreux systèmes ont été développés récemment dans le but de réduire
l’impact environnement (notamment les émissions atmosphériques) et de faciliter
la gestion des déjections avicoles (fumiers de volailles et pondeuses). En ce qui
concerne les bâtiments volailles de chair, de simples mesures permettent de
réduire les émissions d’ammoniac telles que l’épaisseur de la litière et
l’amélioration des systèmes d’abreuvement.
En ce qui concerne les bâtiments de pondeuses, plusieurs études sur le séchage
ont montré leur efficacité. Cependant ces systèmes ne permettent pas d’obtenir un
taux de matière sèche du produit au delà de 50% ; ce séchage incomplet
s’accompagnant de nuisances olfactives et d’émissions d’ammoniac au cours du
stockage et de l’épandage.
Mots-clés : fumier volailles, ammoniac et odeurs, séchage, compostage.
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2. 1. Introduction
Modern poultry breeding techniques have been developed with the purpose of
improving farm productivity, automation and environmental impacts, both indooors
(i.e. animal health and welfare, workers’ safety) and outdoors (i.e. preservation of
soil, water and air quality and their related ecosystems). Several studies which
dealt with housing and manure management systems have been carried out by our
Department in order to have an insight into these aspects.
The aim of the present work is to review different housing and manure handling
systems which are adopted in broiler and laying hen sectors, as far as ammonia
emission are concerned.
2. Materials and methods
During a period of 3 years and taking several technical, environmental, energy and
economic parameters into account, the following full scale poultry barns were
monitored at a full scale :
I. broiler litter bed floor houses,
II. laying hen houses with different types of batteries and manure drying systems,
III. alternative-to-cage systems for laying hens (litter bed and perches),
IV. laying hen houses with manure drying and storage in deep pit.
When the housing systems were characterized by natural ventilation (systems I
and III) ammonia concentration were measured with a photo-acoustic infrared
instrument, the Bruel & Kjaer 1320 with 1303 Multiplexer; air samples were taken in
several points inside the barn in order to calculate the mean indoor ammonia
concentration. Ammonia emissions were calculated basing on airflow rate estimate
by means of the carbon dioxide balance method; the carbon dioxide produced by
animals was estimated at 41 ml CO2 per kJ of the total heat produced by one bird
(Albright, 1990).
Under artificial ventilation conditions (systems II and IV), ammonia concentrations
were measured with the above mentioned instrument; however, air samples were
taken in the airflow at the fan oulets. Ammonia emissions were calculated basing
on airflow rate measurements by means of hot-wire and magnetic transducer
anemometers.
Further details on sampling points and frequencies will be given in the specific
paragraphs.
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3. 3. Broiler houses
Most of the broiler produced in Italy are bred on litter bed in floor barns. Several
experimental tests were carried out by our Department with the purpose of
improving litter management in these housing systems, i.e. litter material, height of
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the layer, number of birds per m , drinking and eating equipments, litter discharge
and storage methods, etc.; aim of the present review is to quantify the effects of
different drinkers on ammonia emissions. With regard to this aspect, tests were
carried out in 2 barns which were identical in reference to the number of animals
(12,800 birds each), the size (12 m x 99 m each) and the litter material (wood
sawdust). Hence, it was possible to compare ammonia levels in the air from barn
equipped with nipple drinkers with those from the barn equipped with nipple
drinkers plus bowls, used for preventing water dropping.
Indoor air was hourly sampled during a period of 9 days in summer; ammonia
concentrations were significantly lower in the barn with nipple drinkers + bowls,
apparently because of a lower moistening of litter below drinkers. The mean airflow
rate was estimate to be 2.4 m h-1 bird-1 ; this estimate showed ammonia
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emissions of 0.657 and 0.404 g day-1 bird-1, for the nipple and nipple + bowl
drinkers respectively (Table 1).
Estimated Ammonia Ammonia emission,
Drinker type Birds / drinker, ventilation rate, concentration, g day-1 bird-1
number m3 h-1 bird-1 mg m-3
Nipples 6.5 2.4 11.4 0.657
Nipples + bowls 12.4 2.4 7.01 0.404
Table 1
Results of ammonia determination in broiler barns
4. Laying hen batteries with manure drying
In Italy, a large number of laying hens are kept in new types of batteries which
allow a partial drying of manure on the conveyer belts. Since 1991, the following
manure drying systems were studied by our Department :
- air moved by a system of paddles over the belts (Salmet Ô);
- air blowed by fans through holed air-ducts over the belts (i.e. Valli Ô);
- air sucked by fans into tunnels over the batteries where manure belts flow
(Farmer Ô).
During a period of 1 year, several parameters (i.e. manure characteristics, energy
consumption, environmental aspects, etc.) were monitored in full scale barns
characterized by different manure drying systems. With regard to ammonia
emissions, results are shown in Table 2.
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4. Ammonia emission in winter, Ammonia emission in summer,
Manure drying system g day-1 bird-1 g day-1 bird-1
Paddle system 0.031 0.172
Air blowed in holed ducts 0.027 0.157
Air sucked in tunnels 0.027 0.134
Table 2
Results of ammonia determinations in laying hen barns characterized
by different manure drying systems
Ammonia emissions from barns equipped with fan drying system batteries were
lower than those from barns characterized by paddle drying system batteries, both
in winter and in summer. However, it must be noticed that ammonia emissions from
all the 3 manure drying systems were considerably lower than those usually shown
by batteries without any drying system. In fact, previous studies concerning barns
which adopted stair-step cage batteries with gutters and scrapers for manure
removal showed that ammonia emissions were about 0.18 g day-1 bird-1 in winter
and up to 0.70 g day-1 bird-1 in summer.
5. Alternative-to-cage systems for laying hens
Housing systems where laying hens are not confined in cages are present in
several European Countries. Until today, these systems have assumed a relatively
little importance in Italy, but the interest in them is growing especially in relation to
the animal welfare requirements as well as to the egg marketing advantages.
Because of this increasing importance, an experimental research was carried out
fucusing on the environmental requirements which these alternative systems have
to meet.
During 3 weeks in spring, two alternative poultry barns were monitored; they were
identical in relation to the ventilation system (natural ventilation), the relative
surface of the bed floor and the perches to the total surface (the litter bed floor was
-2
1/3 of the total surface), the animal density (7 birds m ), but they differed from
each other in the age of breeding animals; one barn kept pullets, the other laying
hens.
The mean indoor ammonia concentration was higher in laying hen barn than that
one in pullet barn; the estimated ammonia emission was 0.262 and 0.192 g day-1
bird-1, for laying hens and pullets respectively (Table 3).
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5. Ammonia Estimated Estimated
Type of birds Concentration, ventilation rate, ammonia emission,
mg m-3 m3 h-1 bird-1 g day-1 bird-1
Pullets 5.4 1.48 0.192
Laying hens 7.0 1.56 0.262
Table 3
Results of ammonia determination in alternative-to-cage
housing systems for laying hens
6. Laying hen housing systems with deep pit storage
The housing system with deep pit storage is characterized by a subdivision of the
barn into two levels: laying hens are kept in stair-step cages at the raised-floor,
while poultry manure is stored at the ground floor during the whole hen production
cycle (over 12 months). A mechanical ventilation system allows both the air
changing at raised-floor and a partial drying of poultry manure at the ground floor.
The inlets of fresh air are located under the eaves, while the suction fans are
placed at the ground floor on the side walls. Hence, the air coming from the upper
level can pass through the mesh floor and/or through the batteries and it can flow
on the manure piles at the ground floor.
An outstanding research which is presently being conducted by our Department
deals both with ammonia emissions from this kind of housing system and manure
characteristics during and after the storage period. Tests are being carried out in
two barns which are characterized by identical size but different types of floor on
the service passages between the batteries; in one poultry barn there is a wire-
mesh floor and hence the air can pass both the mesh floor and the cages, while in
the other there is a solid floor which allows the air to pass only through the cages.
Preliminary results have shown that the ammonia emissions from laying hen
housing systems with deep pit storage are higher than those from the other
housing systems (0.870 – 0.626 g day-1 bird-1, for wire-mesh floor and solid floor
respectively, Table 4).
Floor type in the corridors Ammonia emission
g day-1 bird-1
Wire mesh floor 0.870
Solid floor 0.626
Table 4
Results of ammonia determinations in laying hen houses with deep pit storage
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6. 7. Discussion and Conclusions
Several experimental studies have been carried out by our Department with the
purpose of quantifying the effects of different housing and manure management
systems on air quality, and in particular on ammonia emissions.
Ammonia emissions from poultry barns were important especially in summer. If we
consider that the initial nitrogen concentration in laying hen manure is 45 g total N
kg-1 dry matter, the calculated nitrogen losses as ammonia emissions ranged from
about 6.1 to 39.6% of the total initial manure nitrogen.
Regarding the final nitrogen content in broiler litter as 35 g total N kg-1 dry matter,
the ammonia emissions caused losses which ranged from 22,8 to 32,7% of total
final litter nitrogen.
Drinking equipments for broilers influenced litter bed moisture and consequently
ammonia production from the barns. Ammonia emission from broiler barns where
drinkers for water loss prevention (i.e. nipples + collecting bowls) were adopted,
presented a 38.5% reduction, in comparison with those from broiler barns
characterized by simple nipple drinkers.
Ammonia emissions were reduced down to 80% by timely poultry manure drying
inside the barns, in comparison with ammonia emissions from stair step batteries
without any manure drying systems and a twice-a-month manure removal by
scrapers.
Ammonia esmissions from the “alternative-to-cage” systems were higher than
those from the above mentioned cage systems, but in the same time they were
lower than those from the litter bed housing systems for broilers.
Ammonia emission from the housing systems where poultry manure is stored in
deep pit were the highest, ranging from 0.62 to 0.87 g day-1 bird-1, certainly due to
the long term indoor storage (13 months); moreover, sensible seasonal effects on
ammonia emission could be expected.
Lastly, it must be considered that the storage of poultry manure inside the barns
played an important role on emissions, as regards some of the systems above
described. For this reason, further studies should be necessary in order to
determine the “global” ammonia emissions from the different housing and manure
management systems. For example, considering the poultry manure produced in
broiler and laying hen cage barns, it should be necessary to quantify the ammonia
losses which can occur during manure storage outside the barns.
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7. 8. References
Albright, L.D. Environment control for animals and plants (DeVore-Hansen, P. ed),
Michigan: ASAE, 1990, pp 166-169.
Chiumenti, R.; da Borso, F.; Pinosa, M. Layer keeping systems with manure
th
drying on belts: environmental effects. Proceedings 19 WPSA Congress 20-24
September, Amsterdam, The Netherlands 1992, (3): 282-288.
Climatization of Animal Houses, Report of working group of C.I.G.R. Commission
Internationale di Génie Rural, 1984, pp 1-27.
Da Borso, F.; Chiumenti, R.; Lenarduzzi, M. Sistemi alternativi alle gabbie per
l’allevamento delle galline ovaiole (Alternative-to-cage housing systems for laying
th
hens). Proceedings of 6 National Congress of Agricultural Engineering of AIIA
10-12 September, Ancona, Italy, 1997, (2): 453-462.
Feddes, J.J.R.; Leonard, J.J.; McQuitty, J.B. Carbon dioxide concentration as
measure of air exchange in animal housing. Canadian Agricultural Engineering
1984, 26: 53-56.
Groot Koerkamp, P.W.G. Review on emission of ammonia from housing systems
for laying hens in relation to sources, processes, building design and manure
handling. Journal of Agricultural Engineering Research 1994, 59: 73-87.
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