|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 (126)
Fuel Properties of Torrefied Biomass from Pruning of Oxytree Data (2019)
The very fast growing Oxytree (PaulowniaClonin Vitro 112) is marketed as a promising new energy crop. The tree has characteristically large leaves, thrives in warmer climates, and requires initial pruning for enhanced biomass production in ...
The Development of the INFEWS-ER: A Virtual Resource Center for Transdisciplinary Graduate Student Training at the Nexus of Food, Energy, and Water Frontiers in Environmental Science (2019)
Problems at the nexus of Food, Energy and Water Systems (FEWS) are among the most complex challenges we face. Spanning simple to complex temporal, geographic, social, and political framings, the questions raised at this nexus ...
The Effect of Biochar Addition on the Biogas Production Kinetics from the Anaerobic Digestion of Brewers’ Spent Grain Energies (2019)
Biochar (BC) addition is a novel and promising method for biogas yield increase. Brewer’s spent grain (BSG) is an abundant organic waste with a large potential for biogas production. In this research, for the first ...
Waste to Carbon Energy Demand Model and Data Based on the TGA and DSC Analysis of Individual MSW Components Data (2019)
The pioneering developed simplified mathematical model can be used to determine the energy consumption of the torrefaction process. Specifically, the energy balance model was developed for torrefaction of municipal solid waste (MSW; a combustible fraction ...
Analysis of the Spatial and Temporal Distribution of Process Gases within Municipal Biowaste Compost Sustainability (2019)
Composting processes reduce the weight and volume of biowaste and produce products that can be used in agriculture (e.g., as fertilizer). Despite the benefits of composting, there are also problems such as odors and the ...
On-farm pilot-scale testing of black ultraviolet light and photocatalytic coating for mitigation of odor, odorous VOCs, and greenhouse gases Chemosphere (2019)
Technologies for controlling gaseous emissions of livestock is of interest to producers, the public, and regulatory agencies. In our previous lab-scale study, the use of a photocatalytic coating on surfaces subjected to black ultraviolet light ...
Evaluation of Semi-Continuous Pit Manure Recharge System Performance on Mitigation of Ammonia and Hydrogen Sulfide Emissions from a Swine Finishing Barn Atmosphere (2019)
In this research, for the first time, we present the evaluation of a semi-continuous pit manure recharge system on the mitigation of ammonia (NH3) and hydrogen sulfide (H2S) emissions from a swine finisher barn. The ...
The Spatial and Temporal Distribution of Process Gases within the Biowaste Compost Data (2019)
Composting is generally accepted as the sustainable recycling of biowaste into a useful and beneficial product for soil. However, composting processes can produce gases that are considered air pollutants. In this dataset, we summarized the ...
Stomatal Conductance Measurement for Toxicity Assessment in Zero-Effluent Constructed Wetlands: Effects of Landfill Leachate on Hydrophytes International Journal of Environmental Research and Public Health (2019)
In this research, we explore for the first time the use of leaf stomatal conductance (gs) for phytotoxicity assessment. Plants respond to stress by regulating transpiration. Transpiration can be correlated with stomatal conductance when the ...
Data evidencing slow anaerobic digestion in emergency treatment and disposal of infectious animal carcasses Data in Brief (2019)
Burial of infectious and potentially infectious livestock and poultry animals is the most common response to an emergency situation. The data set summarizes 22-week-long experiment that simulates the environment found within conventional burial trenches for ...
Development of Time-Weighted Average Sampling of Odorous Volatile Organic Compounds in Air with Solid-Phase Microextraction Fiber Housed inside a GC Glass Liner: Proof of Concept Molecules (2019)
Finding farm-proven, robust sampling technologies for measurement of odorous volatile organic compounds (VOCs) and evaluating the mitigation of nuisance emissions continues to be a challenge. The objective of this research was to develop a new ...
Biogenic Volatiles Emitted from Four Cold-Hardy Grape Cultivars During Ripening Data (2019)
In this research dataset, we summarize for the first time volatile organic compounds (VOCs) emitted in vivo from ripening wine grapes. We studied four cold-hardy cultivars grown in the Midwestern U.S.: St. Croix, Frontenac, Marquette, ...
Effects of Harvest Time on the Aroma of White Wines Made from Cold-Hardy Brianna and Frontenac Gris Grapes Using Headspace Solid-Phase Microextraction and Gas Chromatography-Mass Spectrometry-Olfactometry Foods (2019)
The Midwest wine industry has shown a marked increase in growers, hectares planted, wineries, and wine production. This growth coincides with the release of cold-hardy cultivars such as Brianna and Frontenac gris, in 2001 and ...
Evaluation of Volatile Metabolites Emitted In-Vivo from Cold-Hardy Grapes during Ripening Using SPME and GC-MS: A Proof-of-Concept Molecules (2019)
In this research, we propose a novel concept for a non-destructive evaluation of volatiles emitted from ripening grapes using solid-phase microextraction (SPME). This concept is novel to both the traditional vinifera grapes and the cold-hardy ...
Torrefaction of Sewage Sludge: Kinetics and Fuel Properties of Biochars Energies (2019)
We propose a ‘Waste to Carbon’ thermal transformation of sewage sludge (SS) via torrefaction to a valuable product (fuel) with a high content of carbon. One important, technological aspect to develop this concept is the ...
Waste to Carbon: Influence of Structural Modification on VOC Emission Kinetics from Stored Carbonized Refuse-Derived Fuel Sustainability (2019)
The torrefaction of municipal solid waste is one of the solutions related to the Waste to Carbon concept, where high-quality fuel—carbonized refuse-derived fuel (CRDF)—is produced. An identified potential problem is the emission of volatile organic ...
Quantification of VOC Emissions from Carbonized Refuse-Derived Fuel Using Solid-Phase Microextraction and Gas Chromatography-Mass Spectrometry Molecules (2018)
In this work, for the first time, the volatile organic compound (VOC) emissions from carbonized refuse-derived fuel (CRDF) were quantified on a laboratory scale. The analyzed CRDF was generated from the torrefaction of municipal waste. ...
Waste to Carbon: Densification of Torrefied Refuse-Derived Fuel Energies (2018)
In this work, for the first time, the feasibility of obtaining carbonized refuse-derived fuel (CRDF) pelletization from municipal solid waste (MSW) was shown. Production of CRDF by torrefaction of MSW could be the future of ...
Lab-scale evaluation of aerated burial concept for treatment and emergency disposal of infectious animal carcasses Waste Management (2018)
Nearly 55,000 outbreaks of animal disease were reported to the World Animal Health Information Database between 2005 and 2016. To suppress the spread of disease, large numbers of animal mortalities often must be disposed of ...
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 ...
Detection of Volatile Compounds Emitted from Nasal Secretions and Serum: Towards Non-Invasive Identification of Diseased Cattle Biomarkers Separations (2018)
Non-invasive diagnostics and finding biomarkers of disease in humans have been a very active research area. Some of the analytical technologies used for finding biomarkers of human disease are finding their use in livestock. Non-invasive ...
Improving environmental odor measurements: comparison of lab-based standard method and portable odor measurement technology Archives of Environmental Protection (2018)
Current standard odor measurement methods are lab-based and require substantial investment in hardware, sample collection, training, and maintenance. Odor samples must be collected in the field using bags and brought to the lab to test. ...
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 ...