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AMPAT 18
Manure Storage & Handling - Manure Additives Overview
A wide range of manure additives exist on the market. This fact sheet focuses on those products that can be added directly to the manure, or fed through the animal to impact manure. While the use of additives can be implemented with little change to the current manure system, typically effectiveness of product ranges all over the place.

This fact sheet is part of the Air Management Practices Assessment Tool (AMPAT) developed at Iowa State University and funded by the National Pork Board. Additional resources can be found on the AMPAT web site.
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AMPAT 21
Land Application - Application Methods
Land application of manure is an important contributor to the emissions from animal agriculture and has the potential to be a significant source of gases and odors. This fact sheet reviews the effectiveness of different land application methods on reducing emissions and odors.

This fact sheet is part of the Air Management Practices Assessment Tool (AMPAT) developed at Iowa State University and funded by the National Pork Board. Additional resources can be found on the AMPAT web site.
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AMPAT 11
Animal Housing - Urine and Feces Segregation Overview
The manner in which manure is collected can have an impact on emissions. By segregating liquids and solids, it is possible to increase the nitrogen retention in the liquid portion of the manure thereby reducing ammonia emissions. These systems require handling two waste streams.

This fact sheet is part of the Air Management Practices Assessment Tool (AMPAT) developed at Iowa State University and funded by the National Pork Board. Additional resources can be found on the AMPAT web site.
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AMPAT 15
Manure Storage & Handling - Anaerobic Digestion Overview
Anaerobic digestion is the process of breaking apart molecules without oxygen. Anaerobic digestion can more effectively control odors and be used to generate heat or electricity.

This fact sheet is part of the Air Management Practices Assessment Tool (AMPAT) developed at Iowa State University and funded by the National Pork Board. Additional resources can be found on the AMPAT web site.
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AMPAT 16
Manure Storage & Handling - Composting Overview
Composting is a biological process in which microorganisms convert organic material into a soil-like material. Composting, when done correctly can reduce flies, pathogens and weed seed in solid manure sources. It can also reduce odors, but nitrogen loss does occur.

This fact sheet is part of the Air Management Practices Assessment Tool (AMPAT) developed at Iowa State University and funded by the National Pork Board. Additional resources can be found on the AMPAT web site.
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AMPAT 20
Manure Storage & Handling - Solids Separation Overview
Solid-liquid separation is the partial removal of organic and inorganic solids from animal manures. This separation makes the liquid waste stream easier to handle and increases the life of manure storage by decreasing the build-up and solids. It does create two manure streams, solid and liquid, that need to be managed and land applied.

This fact sheet is part of the Air Management Practices Assessment Tool (AMPAT) developed at Iowa State University and funded by the National Pork Board. Additional resources can be found on the AMPAT web site.
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AMPAT 13
Manure Storage & Handling - Acidification Overview
Manipulating the pH of the manure alters the balance between ammonia and ammonium. As ammonia is the volatile of these two compounds, reducing the pH to change ammonia to ammonium can be effective at reducing loss of nitrogen. Additionally, ammonia emissions are an environmental and human health concern. Acidification is one strategy to reduce ammonia emissions.

This fact sheet is part of the Air Management Practices Assessment Tool (AMPAT) developed at Iowa State University and funded by the National Pork Board. Additional resources can be found on the AMPAT web site.
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AMPAT 14
Manure Storage & Handling - Aeration Overview
Aeration is the process of mixing air into the manure to promote the growth of aerobic bacteria. Oxygen must be supplied either naturally, mechanically through mixing, or using oxygen diffusion systems. This technology can provide dramatic odor reduction from livestock waste management facilities, but has not found frequent application in agriculture due to intensive energy use and resulting added utility costs.

This fact sheet is part of the Air Management Practices Assessment Tool (AMPAT) developed at Iowa State University and funded by the National Pork Board. Additional resources can be found on the AMPAT web site.
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AMPAT 9
Animal Housing - Wet Scrubbers Overview
Wet scrubbers are used on ventilation air as it exits livestock housing. They use liquid to collect dust or particulate matter (PM) and absorb gases from air by using a wet surface, spray system, or wet material bed.

This fact sheet is part of the Air Management Practices Assessment Tool (AMPAT) developed at Iowa State University and funded by the National Pork Board. Additional resources can be found on the AMPAT web site.
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AMPAT 17
Manure Storage & Handling - Impermeable Covers
Impermeable covers can be used to reduce odors and emissions from manure storage or to capture biogas for heat or power generation. Impermeable covers are placed on manure storage structures to create a physical barrier that prevents the transfer of volatile chemical compounds from the manure storage headspace to the atmosphere.

This fact sheet is part of the Air Management Practices Assessment Tool (AMPAT) developed at Iowa State University and funded by the National Pork Board. Additional resources can be found on the AMPAT web site.
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AMPAT 19
Manure Storages - Permeable Covers
Permeable covers are used to reduce odors and emissions from manure storage structures. Permeable covers are materials such as a natural crust, straw, ground corn stalks, as well as expanded clays, ceramics and ground rubber that lie directly on the surface of the stored manure and provide a physical barrier between the manure and the surrounding air.

This fact sheet is part of the Air Management Practices Assessment Tool (AMPAT) developed at Iowa State University and funded by the National Pork Board. Additional resources can be found on the AMPAT web site.
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AMPAT 12
Animal Housing - UV Light Overview
UV or Ultraviolet light has been used in water treatment to treat volatile organic compounds (VOCs) and pathogens. This mitigation technique has not been fully developed for use in livestock housing, however it does show great potential as a mitigation technique for reduction in VOCs and odor.

This fact sheet is part of the Air Management Practices Assessment Tool (AMPAT) developed at Iowa State University and funded by the National Pork Board. Additional resources can be found on the AMPAT web site.
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AMPAT 1
Animal Housing - Barriers Overview
Barriers can be used to address dust and odor coming from animal housing. Barriers, or “windbreak walls” are used downwind of fans to reduce forward momentum of airflow, settle out dust particles, and push the exiting plume higher into the atmosphere.

This fact sheet is part of the Air Management Practices Assessment Tool (AMPAT) developed at Iowa State University and funded by the National Pork Board. Additional resources can be found on the AMPAT web site.
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AMPAT 4
Animal Housing - Dietary Manipulation Overview
This fact sheet features diet manipulation as a management practice to address odor and emissions coming from animal housing and manure storage systems. Reducing nutrients in manure can lead to reductions in emissions. Reducing nutrients in manure is broken into two main areas, nutrient input reduction and nutrient form modification. This fact sheet describes both methods.

This fact sheet is part of the Air Management Practices Assessment Tool (AMPAT) developed at Iowa State University and funded by the National Pork Board. Additional resources can be found on the AMPAT web site.
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AMPAT 6
Animal Housing - Landscaping Overview
Landscaping or the use of Vegetative Environmental Buffers (VEBs) can be used to manage odors and dust coming from animal housing and manure storage structures. VEBs can impact odors and dust by dilution, dispersion, deposition, and collection of compounds. In addition, VEBs can reduce impacts on neighbors by creating aesthetically pleasing sites.

This fact sheet is part of the Air Management Practices Assessment Tool (AMPAT) developed at Iowa State University and funded by the National Pork Board. Additional resources can be found on the AMPAT web site.
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AMPAT 10
Animal Housing - Siting Overview
Properly siting an animal housing facility is likely the most important odor control technology that can be implemented. Separation distances, predominate wind direction, exposure angle, and terrain are all important considerations for siting facilities.

This fact sheet is part of the Air Management Practices Assessment Tool (AMPAT) developed at Iowa State University and funded by the National Pork Board. Additional resources can be found on the AMPAT web site.
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AMPAT 2
Animal Housing - Biofilters Overview
Biofilters are used on mechanically ventilated livestock buildings to treat the ventilation air. A bed of biological material, normally wood chips, is created and the ventilation air flows through the material. Gases are absorbed by cultures of microbes that develop in the bed.

This fact sheet is part of the Air Management Practices Assessment Tool (AMPAT) developed at Iowa State University and funded by the National Pork Board. Additional resources can be found on the AMPAT web site.
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AMPAT 3
Animal Housing - Chimney Overview
The use of chimneys in animal housing systems can elevate odors and increase dispersion with increased wind speed and air turbulence at higher elevations.

This fact sheet is part of the Air Management Practices Assessment Tool (AMPAT) developed at Iowa State University and funded by the National Pork Board. Additional resources can be found on the AMPAT web page at: www.agronext.iastate.edu/ampat
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AMPAT 5
Animal Housing - Electrostatic Precipitation Overview
Electrostatic precipitation can be used to reduce emissions, odor and dust from animal housing. Electrostatic systems work by imparting a negative charge on dust particles, causing them to stick to grounded surfaces such as gates, floors and walls.

This fact sheet is part of the Air Management Practices Assessment Tool (AMPAT) developed at Iowa State University and funded by the National Pork Board. Additional resources can be found on the AMPAT web site.
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AMPAT 7
Animal Housing - Vegetable Oil Sprinkling Overview
This fact sheet features vegetable oil sprinkling as a management practice to address emissions, odor and dust coming from animal housing. The principal behind vegetable oil sprinkling is that oil is sprayed into the air causing the dust particles to stick to oil droplets and other dust particles, thereby settling to the floor.

This fact sheet is part of the Air Management Practices Assessment Tool (AMPAT) developed at Iowa State University and funded by the National Pork Board. Additional resources can be found on the AMPAT web site.
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AMPAT 8
Animal Housing - Elimination of Pit Ventilation Overview
Pit ventilation does not function as originally thought and research has shown it does not provide increased air quality for animals. Research also shows it does increase the emission rate from the pit.

This fact sheet is part of the Air Management Practices Assessment Tool (AMPAT) developed at Iowa State University and funded by the National Pork Board. Additional resources can be found on the AMPAT web site.
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