|August 2004 - Present||Associate Professor, Iowa State University ‐ Department of Agricultural and Biosystems Engineering|
|August 2000 - August 2004||Assistant Professor, Texas A&M University ‐ Agricultural Research and Extension Center|
|August 1998 - August 2000||Postdoctoral Fellowship, University of Waterloo ‐ Department of Chemistry|
|2017 - Present||Evaluation of current products for use in deep pit swine manure storage structures for mitigation of odors and reduction of NH3, H2S, and VOC emissions from stored swine manure|
|National Pork Board|
|Colleague(s): Dan Andersen, David B. Parker|
|2016 - Present||INFEWS/T4: The INFEWS-ER: a Virtual Resource Center Enabling Graduate Innovations at the Nexus of Food, Energy, and Water Systems.|
|National Science Foundation - 1639340|
|Colleague(s): Luis Rodriguez, Deanne Meyer, Anna-Maria Marshall, Rick Koelsch|
Honors and Awards
- Outstanding Toxicology Faculty Mentor Award, Iowa State University, 2011
- Nomination for the Grand Prize Katerva Award, 2011
- Multistate Research Award for Project S-1032—Improving the sustainability of livestock and poultry production in the United States, 2011
- The Best Paper Award—1st World Conference PETrA (Pollution and Environment—Treatment of Air), 2011
- Alpha Epsilon Agricultural Engineering Society, Honorary Member, 2011
- ISU College of Agriculture and Life Sciences Mid-Career Achievement in Research Award, 2010
|1994 - 1998||PhD, PhD, University of Texas at Austin ‐ Civil and Environmental Engineering|
|August 1991 - December 1993||MS, MS in Environmental Quality Engineering, University of Alaska Anchorage ‐ Civil Engineering|
4350 Elings Hall
605 Bissell Rd
Ames, IA 50011-1098
Peer-Reviewed Articles (91)
Determination of Selected Aromas in Marquette and Frontenac Wine Using Headspace-SPME Coupled with GC-MS and Simultaneous Olfactometry Separations (2018)
Understanding the aroma profile of wines made from cold climate grapes is needed to help winemakers produce quality aromatic wines. The current study aimed to add to the very limited knowledge of aroma-imparting compounds in ...
Farm-scale testing of soybean peroxidase and calcium peroxide for surficial swine manure treatment and mitigation of odorous VOCs, ammonia and hydrogen sulfide emissions Atmospheric Environment (2017)
The swine industry, regulatory agencies, and the public are interested in farm-tested methods for controlling gaseous emissions from swine barns. In earlier lab- and pilot-scale studies, a renewable catalyst consisting of soybean peroxidase (SBP) mixed ...
Method for sampling and analysis of volatile biomarkers in process gas from aerobic digestion of poultry carcasses using time-weighted average SPME and GC–MS Food Chemistry (2017)
A passive sampling method, using retracted solid-phase microextraction (SPME) – gas chromatography–mass spectrometry and time-weighted averaging, was developed and validated for tracking marker volatile organic compounds (VOCs) emitted during aerobic digestion of biohazardous animal tissue. ...
Quantification of BTEX in Soil by Headspace SPME–GC–MS Using Combined Standard Addition and Internal Standard Calibration Chromatographia (2017)
There is a great demand for simple, fast and accurate methods for quantification of volatile organic contaminants in soil samples. Solid-phase microextraction (SPME) has a huge potential for this purpose, but its application is limited ...
Use of fecal volatile organic compound analysis to discriminate between non-vaccinated and BCG—Vaccinated cattle prior to and after Mycobacterium bovis challenge PLoS ONE (2017)
Bovine tuberculosis is a zoonotic disease of global public health concern. Development of diagnostic tools to improve test accuracy and efficiency in domestic livestock and enable surveillance of wildlife reservoirs would improve disease management and ...
Development of an Automated Method for Selected Aromas of Red Wines from Cold-Hardy Grapes Using Solid-Phase Microextraction and Gas Chromatography-Mass Spectrometry-Olfactometry Separations (2017)
The aroma profile of red wine is complex and research focusing on aroma compounds and their links to viticultural and enological practices is needed. Current research is limited to wines made from cold-hardy cultivars (interspecific ...
Mitigation of Livestock Odors Using Black Light and a New Titanium Dioxide-Based Catalyst: Proof-of-Concept Atmosphere (2017)
Concentrated livestock feeding operations have become a source of odorous gas emissions that impact air quality. Comprehensive and practical technologies are needed for a sustainable mitigation of the emissions. In this study, we advance the ...
Field scale measurement of greenhouse gas emissions from land applied swine manure Frontiers of Environmental Science & Engineering (2017)
Greenhouse gas emissions (GHGs) from swine production systems are relatively well researched with the exception of emissions from land application of manure. GHGs inventories are needed for process-based modeling and science-based regulations. Thus, the objective ...
Odour reducing microbial-mineral additive for poultry manure treatment Frontiers of Environmental Science & Engineering (2017)
Poultry production systems are associated with emissions of odorous volatile organic compounds (VOCs), ammonia (NH3), hydrogen sulfide (H2S), greenhouse gases, and particulate matter. Development of mitigation technologies for these emissions is important. Previous laboratory-scale research ...
Efficacy of NH3 as a secondary barrier treatment for inactivation of Salmonella Typhimurium and methicillin-resistant Staphylococcus aureus in digestate of animal carcasses: Proof-of-concept PLoS ONE (2017)
Managing the disposal of infectious animal carcasses from routine and catastrophic disease outbreaks is a global concern. Recent research suggests that burial in lined and aerated trenches provides the rapid pathogen containment provided by burial, ...
Pilot-scale testing of renewable biocatalyst for swine manure treatment and mitigation of odorous VOCs, ammonia and hydrogen sulfide emissions Atmospheric Environment (2017)
Comprehensive control of odors, hydrogen sulfide (H2S), ammonia (NH3), and greenhouse gas (GHG) emissions associated with swine production is a critical need. A pilot-scale experiment was conducted to evaluate surface-applied soybean peroxidase (SBP) and calcium ...
Characterizing the scent and chemical composition of Panthera leo marking fluid using solid-phase microextraction and multidimensional gas chromatography–mass spectrometry-olfactometry Scientific Reports (2017)
Lions (Panthera leo) use chemical signaling to indicate health, reproductive status, and territorial ownership. To date, no study has reported on both scent and composition of marking fluid (MF) from P. leo. The objectives of ...
Evaluation of Tannins and Anthocyanins in Marquette, Frontenac, and St. Croix Cold-Hardy Grape Cultivars Fermentation (2017)
Cold-hardy grape cultivars have become popular in northern regions. Wines from these cultivars are low in tannins and lighter in color compared to Vitis vinifera. The northern regions are striving to enhance desired ″full body″ ...
Passive Sampling and Analysis of Naphthalene in Internal Combustion Engine Exhaust with Retracted SPME Device and GC-MS Atmosphere (2017)
Exhaust gases from internal combustion engines are the main source of urban air pollution. Quantification of Polycyclic aromatic hydrocarbons (PAHs) in the exhaust gases is needed for emissions monitoring, enforcement, development, and testing of control ...
Pilot-Scale Testing of Non-Activated Biochar for Swine Manure Treatment and Mitigation of Ammonia, Hydrogen Sulfide, Odorous Volatile Organic Compounds (VOCs), and Greenhouse Gas Emissions Sustainability (2017)
Managing the environmental impacts associated with livestock production is a challenge for farmers, public and regulatory agencies. Sustainable solutions that take into account technical and socioeconomic factors are needed. For example, the comprehensive control of ...
Successful grant-writing strategies for junior scientists: An American public university perspective Puls Uczelni (2016)
The objective of this article was to summarize selected successful grant writing strategies from the perspective of an American public university faculty member. Early sections focused on describing the American public university system aspects that ...
Perspectives and challenges of on-site quantification of organic pollutants in soils using solid-phase microextraction TrAC Trends in Analytical Chemistry (2016)
This study explores the current state-of-the-art progress toward on-site quantification of organic pollutants in soils with solid-phase microextraction (SPME). In spite of many available methods, only few publications report on-site analyses of soil samples by ...
Simple and accurate quantification of BTEX in ambient air by SPME and GC–MS Talanta (2016)
Benzene, toluene, ethylbenzene and xylenes (BTEX) comprise one of the most ubiquitous and hazardous groups of ambient air pollutants of concern. Application of standard analytical methods for quantification of BTEX is limited by the complexity ...
Summary of performance data for technologies to control gaseous, odor, and particulate emissions from livestock operations: Air management practices assessment tool (AMPAT) Data in Brief (2016)
The livestock and poultry production industry, regulatory agencies, and researchers lack a current, science-based guide and data base for evaluation of air quality mitigation technologies. Data collected from science-based review of mitigation technologies using practical, ...
Performance of a plastic-wrapped composting system for biosecure emergency disposal of disease-related swine mortalities Waste Management (2016)
A passively-ventilated plastic-wrapped composting system initially developed for biosecure disposal of poultry mortalities caused by avian influenza was adapted and tested to assess its potential as an emergency disposal option for disease-related swine mortalities. Fresh ...
Analysis of Odorants in Marking Fluid of Siberian Tiger (Panthera tigris altaica) Using Simultaneous Sensory and Chemical Analysis with Headspace Solid-Phase Microextraction and Multidimensional Gas Chromatography-Mass Spectrometry-Olfactometry Molecules (2016)
Scent-marking is the most effective method of communication in the presence or absence of a signaler. These complex mixtures result in a multifaceted interaction triggered by the sense of smell. The objective was to identify ...
Further purification of food‐grade alcohol to make a congener‐free product Journal of the Institute of Brewing (2016)
Most alcoholic beverages contain small amounts of chemicals other than ethanol, the congeners. These are byproducts of the fermentation process of the substrate. Congeners are implicated in contributing to hangover (veisalgia) symptoms and it is ...
Optimization of extraction parameters for quantification of fermentation volatile by‐products in industrial ethanol with solid‐phase microextraction and gas chromatography Journal of the Institute of Brewing (2016)
The rapid growth of the biofuels industry resulted in new research needs in chemical analysis. Methods for screening and quantification of impurities resulting from changes in feedstock, process and purification are needed. Direct sample injection ...
Surface Application of Soybean Peroxidase and Calcium Peroxide for Reducing Odorous VOC Emissions from Swine Manure Slurry Applied Engineering in Agriculture (2016)
A laboratory experiment was conducted to evaluate and compare surface-applied versus fully-mixed treatments of soybean peroxidase (SBP) plus calcium peroxide (CaO2) for reducing odorous volatile organic compound (VOC) emissions from swine manure slurry. Industrial-grade SBP ...
Taking ethanol quality beyond fuel grade: A review Journal of the Institute of Brewing (2016)
Ethanol production in the United States approached 15 billion gal/year in 2015. Only about 2.5% of this was food‐grade alcohol, but this represents a higher‐value product than fuels or other uses. The ethanol production process ...