Emissions from Swine Manure Treated with Current Products for Mitigation of Odors and Reduction of NH3, H2S, VOC, and GHG Emissions

Abstract

Odor and gaseous emissions from the swine industry are of concern for the wellbeing of humans and livestock. Additives applied to the swine manure surface are popular, marketed products to solve this problem and relatively inexpensive and easy for farmers to use. There is no scientific data evaluating the effectiveness of many of these products. We evaluated 12 manure additive products that are currently being marketed on their effectiveness in mitigating odor and gaseous emissions from swine manure. We used a pilot-scale system simulating the storage of swine manure with a controlled ventilation of headspace and periodic addition of manure. This dataset contains measured concentrations and estimated emissions of target gases in manure headspace above treated and untreated swine manure. These include ammonia (NH3), hydrogen sulfide (H2S), greenhouse gases (CO2, CH4, and N2O), volatile organic compounds (VOC), and odor. The experiment to test each manure additive product lasted for two months; the measurements of NH3 and H2S were completed twice a week; others were conducted weekly. The manure for each test was collected from three different farms in central Iowa to provide the necessary variety in stored swine manure properties. This dataset is useful for further analyses of gaseous emissions from swine manure under simulated storage conditions and for performance comparison of marketed products for the mitigation of gaseous emissions. Ultimately, swine farmers, the regulatory community, and the public need to have scientific data informing decisions about the usefulness of manure additives.

Mitigation of Odor, NH3, H2S, GHG, and VOC Emissions With Current Products for Use in Deep-Pit Swine Manure Storage Structures

“…The "Experiments" section is largely reduced to the essentials to avoid redundant information that was described in detail in the "Methods" section of the recently published paper (Chen et al, 2020b). The Chen et al (2020b) paper is focused on methods and raw data presentation in an organized fashion for transparency and reuse. This paper focuses on data analysis, results, discussion, and conclusions.…”

“…A detailed description of the experimental design, key components of manure storage simulators, properties of manure, airflow control, gas (NH 3 , H 2 S, CO 2 , CH 4 , N 2 O), 11 odorous VOCs and odor concentration measurements are presented elsewhere (Chen et al, 2020b).…”

“…Fresh manure was collected from three farms at different locations in Iowa. The detailed manure properties and manure collection are presented elsewhere (Chen et al, 2020b).…”

“…NH 3 and H 2 S concentrations were measured with both Drager X-am 5600 portable gas analyzer and OMS-300, which can be used to measure real-time gas concentrations. OMS-300 is equipped with NH 3 /CR-1000 and H 2 S/C-50 electrochemical gas sensors (Wallisellen, Switzerland), and Drager X-am 5600 equipped with NH 3 and H 2 S XS sensors (Luebeck, Germany) (Maurer et al, 2017b;Wi et al, 2019;Chen et al, 2020b).…”

Mitigation of Gaseous Emissions from Swine Manure with the Surficial Application of Biochars

“…Clearly, the need is still there as the performance data for marketed products is nearly non-existent [4,5]. In a recent publication, Chen et al (2020a) reported on a comprehensive study to evaluate gas emissions data from swine manure treated with different commercial additive products [58].…”