Integrated Life Cycle And Techno-Economic Assessment Of The Conversion Of High Productivity, Low Lipid Algae To Renewable Fuels, Chad R. De Mill
All Graduate Theses and Dissertations
The production of alternative transportation fuels is imperative to meet future energy demands without contributing to global climate change. Advances in alternative processing techniques that have emerged due to interest in microalgae as a feedstock have led to a variety of potential processing pathways for the production of bio-based fuels. A major hurdle in the algal production process is maintaining a fast and stable algae culture. Monocultures, developed for their high lipid content, suffer from low productivity, are susceptible to crashes and require a constant supply of carbon dioxide to maintain productivity. In an effort to circumvent these obstacles, algal ...
Pilot-Scale Testing Of Renewable Biocatalyst For Swine Manure Treatment And Mitigation Of Odorous Vocs, Ammonia And Hydrogen Sulfide Emissions, Devin L. Maurer, Jacek A. Koziel, Kelsey M. Bruning, David B. Parker
Agricultural and Biosystems Engineering Publications
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 peroxide (CaO2) as a manure additive to mitigate emissions of odorous volatile organic compounds (VOC) including dimethyl disulfide/methanethiol (DMDS/MT), dimethyl trisulfide, n-butyric acid, valeric acid, isovaleric acid, p-cresol, indole, and skatole. The secondary impact on emissions of NH3, H2S, and GHG was also measured. The SBP was tested at four treatments (2.28–45 ...
The Irreversible Momentum Of Clean Energy, 2017 President of the United States
The Irreversible Momentum Of Clean Energy, Barack Obama
US Department of Energy Publications
The release of carbon dioxide (CO2) and other greenhouse gases (GHGs) due to human activity is increasing global av-erage surface air temperatures, disrupting weather patterns, and acidifying the ocean (1). Left unchecked, the continued growth of GHG emissions could cause global average tem-peratures to increase by another 4°C or more by 2100 and by 1.5 to 2 times as much in many midcontinent and far northern locations (1). Although our understanding of the impacts of climate change is increasingly and disturbingly clear, there is still debate about the proper course for U.S. policy—a debate that is ...
Predicting Field Water Balance, Crop Yield, And The Economics Of Drainage Under Various Cropping Systems Using Drainmod, 2017 South Dakota State University
Predicting Field Water Balance, Crop Yield, And The Economics Of Drainage Under Various Cropping Systems Using Drainmod, Shailendra Singh
Subsurface drainage received considerable attention during the recent few years in South Dakota. While subsurface drainage is a widely accepted water management practice for increasing crop yield, research implicated tile drainage in surface and groundwater quality problems. Conservation practices such as crop rotation and controlled drainage may decrease tile flows and improve water quality. A two-year (2014-2015) subsurface drainage study was conducted at South Dakota State University Southeast Research Farm (SERF) near Beresford, South Dakota to evaluate the effectiveness of selected conservation practices in reducing drainage volume and nitrate losses. Six experimental plots, under corn-soybean rotation, divided into drained and ...
Moving Integrated Weed Management From Low Level To A Truly Integrated And Highly Specific Weed Management System Using Advanced Technologies, S. L. Young, S. K. Pitla, F. K. Van Evert, J. K. Schueller, F. J. Pierce
Biological Systems Engineering: Papers and Publications
Integrated weed management (IWM) is one of the most commonly referred to approaches for sustainable and effective weed control in agriculture, yet it is not widely practiced, likely because current IWM systems fail to meet performance expectations of growers. The effectiveness and value of IWM systems should increase with increasing application specificity and true integration made possible with contemporary advances in technology, information systems and decision support. IWM systems can be classified based on their degree of application specificity and level of integration of tactics. In the application specificity pathway, a tactic is applied at a range of scales, from ...
Pesticide Residue Regulation: Analysis Of Food Quality Protection Act Implementation, 2016 University of New Hampshire
Pesticide Residue Regulation: Analysis Of Food Quality Protection Act Implementation, Linda-Jo Schierow
RISK: Health, Safety & Environment
Dr. Schierow discusses the effects of a recent statute on food safety.
Gis-Based Environmental And Economic Analysis Of Integrated Crop-Livestock Production Systems In Southern Iowa, 2016 Iowa State University
Gis-Based Environmental And Economic Analysis Of Integrated Crop-Livestock Production Systems In Southern Iowa, U. Sunday Tim, Robert W. Jolly, Daniel Otto
U. Sunday Tim
Crop and livestock production are important economic components for many rural com munities. In 1992, Iowa led the nation in corn and hog production, and ranked second, third, seventh, and eighth, respectively in soybean, cattle and calves, poultry, and dairy cow pro duction. Livestock and livestock products generated over 64% of the state's total cash farm receipts during 1992—more than $6.5 billion sales at the farm level.
Contextual Motivation In Physical Activity By Means Of Association Rule Mining, 2016 Iowa State University
Contextual Motivation In Physical Activity By Means Of Association Rule Mining, Sugam Sharma, Udoyara Sunday Tim, Marinelle Payton, Hari Cohly, Shashi Gadia, Johnny Wong, Sudharshanam Karakala
U. Sunday Tim
The primary thrust of this work is to demonstrate the applicability of association rule mining in public health domain, focusing on physical activity and exercising. In this paper, the concept of association rule mining is shown assisting to promote the physical exercise as regular human activity. Specifically, similar to the prototypical example of association rule mining, market basket analysis, our proposed novel approach considers two events – exercise (sporadic) and sleep (regular) as the two items of the frequent set; and associating the former, exercise event, with latter, the daily occurring activity sleep at night, helps strengthening the frequency of the ...
Economic Analysis Of Variable Rate Management For Corn And Soybean Systems, 2016 Iowa State University
Economic Analysis Of Variable Rate Management For Corn And Soybean Systems, William D. Batchelor, Bruce A. Babcock, Alfred M. Blackmer, Richard M. Cruse, Thomas S. Colvin, Ramesh S. Kanwar, U. Sunday Tim
U. Sunday Tim
What is the potential payoff for farmers moving from traditional whole-field management or integrated crop management to precision farming? Using computer models, the investigators sought to analyze how inputs can be applied at optimal rates variably across a field in order to match inputs with crop needs. Over the long term, only modest increases were shown in gross returns from these practices. However, gross returns for individual years can be substantial.
Techno-Economic Analysis (Tea) Of Extruded Aquafeeds, 2016 Iowa State University
Techno-Economic Analysis (Tea) Of Extruded Aquafeeds, Rashid A. Suleiman, Chenxu Yu, Kurt A. Rosentrater
The worldwide decline and overexploitation of ocean fisheries stocks had provided incentive for rapid growth of aquaculture. The aquaculture industry has been recognized as the fastest-growing food production system globally, with a 10% increases in production per year, and is one of the most reliable and sustainable growth markets for manufactured feeds. Extrusion technology has been extensively used in the modern aquatic feed manufacturing, due to nutritional, physical properties improvements and cost effectiveness of feeds. Cost related to aquatic feed remains the biggest challenge, especially for small-scale producers. In this study a single screw extruders and three different scenarios (i ...
Fluorescent Nanoparticles From Several Commercial Beverages: Their Properties And Potential Application For Bioimaging, 2016 Chinese Academy of Sciences
Fluorescent Nanoparticles From Several Commercial Beverages: Their Properties And Potential Application For Bioimaging, Han Liao, Chengkun Jiang, Wenqiang Liu, Juan Manuel Vera, Oscar David Seni, Kevin Demera, Chenxu Yu, Mingquan Tan
The presence of nanoparticles in beverages has raised great concern in terms of potential impacts to consumer health. Herein, carbon dots in beverages kvass, pony malta, pilsner beer, Vivant Storm, and Profit were identified. They were shown to have a strong fluorescence under the excitation of ultraviolet light. The emission peaks shift to longer wavelengths accompanied by a remarkable fluorescence intensity decrease. The carbon dots are in the nanosized range and roughly spherical in appearance. Elemental analysis by X-ray photoelectron spectroscopy demonstrated the composition of Kvass carbon dots to be C 83.17%, O 13.83%, and N 3.00 ...
Microstructure And Antimicrobial Functionality Of Nano-Enhanced Protein-Based Biopolymers, 2016 Iowa State University
Microstructure And Antimicrobial Functionality Of Nano-Enhanced Protein-Based Biopolymers, Dattatreya M. Kadam, Chao Wang, Sheng Wang, David A. Grewell, Buddhi P. Lamsal, Chenxu Yu
Whey protein isolates (WPI) and corn zein protein (CZP) films, embedded with porous silica-coated titanium nano-enhancers (TiO2@@SiO2), were prepared and exhibited enhanced antimicrobial functionality. Protein solutions at 5% WPI and 13.5% CZP were amended with 1.5% w/w of TiO2@@SiO2 nano-enhancers and subjected to sonication at 0, 16, 80, and 160 µm amplitude prior to casting into films. The effects of sonication on nano-enhancer distribution and the structure and morphology of the resulting films were elucidated by transmission electron microscope (TEM). The surface structure of the films was altered by the presence of nano-enhancers. The nano-enhanced ...
Estimating The Field Capacity Of Farm Machines, 2016 Iowa State University
Estimating The Field Capacity Of Farm Machines, Mark Hanna
H. Mark Hanna
The field capacity of a farm machine is the rate at which it performs its primary function, i.e., the number of acres that can be disked per hour or the number of tons of hay that can be baled per hour. Measurements or estimates of machine capacities are used to schedule field operations, power units, labor, and to estimate machine operating costs.
Characterization Of Ground Nozzles For Pesticide Applications, 2016 University of Nebraska - Lincoln
Characterization Of Ground Nozzles For Pesticide Applications, Ryan Henry
Theses, Dissertations, and Student Research in Agronomy and Horticulture
Pesticide applications are a common component of crop production systems in the United States (US). For row crop systems (e.g. corn, soybean, or wheat), pesticides are applied by ground, aerial, or chemigation methods. The exact method of pesticide delivery is not universally regulated/ prescribed in the US, and the equipment and application technique are largely defined by the individual applicator. A wide variety of choices and decisions must be made by applicators to result in a successful pesticide application. Examples of these choices include proper active ingredient(s), carrier volume and equipment (e.g. nozzle type, spacing, and operating ...
Deployment And Evaluation Of An Active Rfid Tracking System For Precision Animal Management, 2016 University of Nebraska - Lincoln
Deployment And Evaluation Of An Active Rfid Tracking System For Precision Animal Management, Brian Barnes
Biological Systems Engineering--Dissertations, Theses, and Student Research
A better understanding of animal space utilization in current livestock facilities could lead to improved facility design and animal health. This study was conducted to determine whether an active RFID tag tracking system could accurately provide animal locomotion data on an individual animal basis. The system is composed of four sensors, located in the corners of a swine pen, and compact tags, which attach to the animals and transmit a signal. The sensors use the tag signals to determine 3-D positions in real-time. A data acquisition system was developed to capture raw data from the system software into a database ...
Rural School Wastewater Treatment System, 2016 University of Tennessee, Knoxville
Rural School Wastewater Treatment System, Parker J. Dulin, Payton M. Smith, James W. Swart
University of Tennessee Honors Thesis Projects
No abstract provided.
An Economic Evaluation Of A Biofuel Supply Chain Utilizing Multiple Feedstocks, 2016 University of Tennessee, Knoxville
An Economic Evaluation Of A Biofuel Supply Chain Utilizing Multiple Feedstocks, Huaqi Zhang
Biomass is considered as one potential feedstock for biofuel production. However, the high cost of biomass-to-biofuel supply chain, attributed to biomass’s low bulk density and resulting harvest, storage, and transportation challenges, has been a major hindrance to the success of biomass-based biofuel industry. In addition, the issue of dry matter losses during storage for a feedstock has affected biomass quantity and quality if the feedstock is stored for several months after a single harvest in a year. One potential way to improve the economics of biomass supply chain is to reduce storage need and enhance the utilization of harvest ...
Yield Measurement System For Seed Corn: Improving Dynamic Weight Accuracy And Harvest Area Determination, 2016 University of Tennessee, Knoxville
Yield Measurement System For Seed Corn: Improving Dynamic Weight Accuracy And Harvest Area Determination, Fatima Ellyn Murillo
A prototype weight-based yield mapping system for seed corn production was developed at the University of Tennessee (UTK) and field tested in Iowa. The first chapter of the following study focuses on assessing the accuracy of this yield mapping system which employs a novel yield prediction and analysis software called Yield Analyzer. Yield Analyzer was designed using a rule-based system for producing yield maps with minimal user input by automatically determining acceptable ranges for known dependent variables that contribute to dynamic weight measurement errors.
The second chapter of this thesis covers the development of a non-intrusive, machine vision technique to ...
Chilling Aeration To Control Pests And Maintain Grain Quality During In-Bin Storage Of Wheat In Kansas, 2016 Kansas State University
Chilling Aeration To Control Pests And Maintain Grain Quality During In-Bin Storage Of Wheat In Kansas, Alejandro Morales-Quiros, Carlos A. Campabadal, Dirk E. Maier, Sonia Lazzari, Flavio Lazzari, Sam Cook, Thomas W. Phillips
Dirk E. Maier
Chilling aeration of stored grain is becoming very popular around the world since it offers many advantages in situations where ambient air conditions are not adequate to cool grain. It allows to cool grain, independent of ambient conditions, to “safe” temperatures where insect, fungi, and spoilage development is reduced to the minimum, and at the same time can potentially reduce chemical control use. The objective of this research was to evaluate the effectiveness of chilling aeration to preserve grain quality and control insect-pests. The research trial was developed from August to November 2015 in Central Kansas in two 1,270 ...
Microbial Enzyme Production Using Lignocellulosic Food Industry Wastes As Feedstock: A Review, 2016 Dublin Institute of Technology
Microbial Enzyme Production Using Lignocellulosic Food Industry Wastes As Feedstock: A Review, Amit Jaiswal, Rajeev Ravindran
Enzymes are of great importance in the industry due to their substrate and product specificity, moderate reaction conditions, minimal by-product formation and high yield. They are important ingredients in several products and production processes. Up to 30% of the total production cost of enzymes is attributed to the raw materials costs. The food industry expels copious amounts of processing waste annually, which is mostlylignocellulosicin nature. Upon proper treatment,lignocellulosecan replace conventional carbon sources in media preparations for industrial microbial processes, such as enzyme production. However, wild strains of microorganisms that produce industrially important enzymes show low yield and cannot thrive ...