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Integrated Life Cycle And Techno-Economic Assessment Of The Conversion Of High Productivity, Low Lipid Algae To Renewable Fuels, Chad R. De Mill 2017 Utah State University

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 2017 Iowa State University

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, Barack Obama 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, Shailendra Singh 2017 South Dakota State University

Predicting Field Water Balance, Crop Yield, And The Economics Of Drainage Under Various Cropping Systems Using Drainmod, Shailendra Singh

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 ...


Understanding The Impacts Of Ammonia Fiber Expansion (Afex™) Pretreatment And Densification On Densified Products Quality And The Bioproducts Yield Through Enzymatic Hydrolysis And Fast Pyrolysis, Vijay Sundaram 2017 South Dakota State University

Understanding The Impacts Of Ammonia Fiber Expansion (Afex™) Pretreatment And Densification On Densified Products Quality And The Bioproducts Yield Through Enzymatic Hydrolysis And Fast Pyrolysis, Vijay Sundaram

Theses and Dissertations

Lignocellulosic biomass poses significant challenges during handling, transportation, and storage due to its low bulk density. Densification involves conversion of the low bulk density biomass into a highly compacted product which helps in improving the handling, transporting, and storage obstacles associated with biomass logistics. Besides the logistical challenges, the recalcitrant nature of the lignocellulosic biomass makes it even more challenging during the enzymatic hydrolysis. The carbohydrate components, cellulose and hemicellulose are not readily accessible by the enzymes during the hydrolysis process due to the presence of lignin. Pretreatment is the process to convert the native recalcitrant biomass in the form ...


A Meta-Analysis Of The Effect Of Industry Engagement On Student Learning In Undergraduate Programs, Caleb Burns, Shweta Chopra 2017 Iowa State University

A Meta-Analysis Of The Effect Of Industry Engagement On Student Learning In Undergraduate Programs, Caleb Burns, Shweta Chopra

Agricultural and Biosystems Engineering Publications

Universities incorporate industry engagement alongside classroom teaching to prepare today’s students to become tomorrow’s entrepreneurs, workers, or researchers to make the world a better place. Successful industry engagement activities provide students with life-changing experiences that can: (a) enhance students’ networking connections with professionals who can potentially provide employment references and future job positions, (b) give students an opportunity to gain practical experience by observing and applying the methods and theories learned in classroom to real-world scenarios, (c) allow students to gain experience in their prospective career path, and (d) improve students’ professional communication skills. Existing research has suggested ...


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 2017 Cornell University

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, Linda-Jo Schierow 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.


Successful Grant-Writing Strategies For Junior Scientists: An American Public University Perspective, Jacek A. Koziel 2016 Iowa State University

Successful Grant-Writing Strategies For Junior Scientists: An American Public University Perspective, Jacek A. Koziel

Agricultural and Biosystems Engineering Publications

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 are the background to incentivizing and rewarding successful grant writing. The latter sections focused on examples of resources from the personal to the national level for grant wring. The article concluded with tips for successful grant-writing for junior scientists that are known to work regardless of a particular academic system. The author is a faculty member of one of the first public universities in U ...


Characterization Of Ground Nozzles For Pesticide Applications, Ryan Henry 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, Brian Barnes 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, Parker J. Dulin, Payton M. Smith, James W. Swart 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.


Yield Measurement System For Seed Corn: Improving Dynamic Weight Accuracy And Harvest Area Determination, Fatima Ellyn Murillo 2016 University of Tennessee, Knoxville

Yield Measurement System For Seed Corn: Improving Dynamic Weight Accuracy And Harvest Area Determination, Fatima Ellyn Murillo

Masters Theses

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 ...


An Economic Evaluation Of A Biofuel Supply Chain Utilizing Multiple Feedstocks, Huaqi Zhang 2016 University of Tennessee, Knoxville

An Economic Evaluation Of A Biofuel Supply Chain Utilizing Multiple Feedstocks, Huaqi Zhang

Masters Theses

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 ...


Identification Of The Core Set Of Carbon-Associated Genes In A Bioenergy Grassland Soil, Adina Howe, Fan Yang, Ryan J. Williams, Folker Meyer, Kirsten S. Hofmockel 2016 Iowa State University

Identification Of The Core Set Of Carbon-Associated Genes In A Bioenergy Grassland Soil, Adina Howe, Fan Yang, Ryan J. Williams, Folker Meyer, Kirsten S. Hofmockel

Agricultural and Biosystems Engineering Publications

Despite the central role of soil microbial communities in global carbon (C) cycling, little is known about soil microbial community structure and even less about their metabolic pathways. Efforts to characterize soil communities often focus on identifying differences in gene content across environmental gradients, but an alternative question is what genes are similar in soils. These genes may indicate critical species or potential functions that are required in all soils. Here we identified the “core” set of C cycling sequences widely present in multiple soil metagenomes from a fertilized prairie (FP). Of 226,887 sequences associated with known enzymes involved ...


Microbial Enzyme Production Using Lignocellulosic Food Industry Wastes As Feedstock: A Review, Amit Jaiswal, Rajeev Ravindran 2016 Dublin Institute of Technology

Microbial Enzyme Production Using Lignocellulosic Food Industry Wastes As Feedstock: A Review, Amit Jaiswal, Rajeev Ravindran

Articles

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 ...


Flex-Ro: Design, Implementation, And Control Of Subassemblies For An Agricultural Robotic Platform, Jared Patrick Werner 2016 University of Nebraska - Lincoln

Flex-Ro: Design, Implementation, And Control Of Subassemblies For An Agricultural Robotic Platform, Jared Patrick Werner

Biological Systems Engineering--Dissertations, Theses, and Student Research

Automation technology in agriculture is growing, making agricultural robotics viable. Innovative field usable multi-purpose robotic platforms are needed for the successful progression of agricultural robotics. Furthermore, the field of agricultural robotics would benefit from a robotic platform design allowing for variable height, thus accommodating navigation throughout various crop growth stages. A variable height machine, Flex-Ro was developed to accommodate this feature. Multiple sub-assemblies were designed and implemented for Flex-Ro. An electronic control unit (ECU) enabled engine was used to power Flex-Ro. An embedded application program was developed to control engine speed using proprietary Controller Area Network (CAN) messages in conjunction ...


Incentive Systems In Organizations: The Scientific Perspective, Nir Keren, Matthew E. Harvey 2016 Iowa State University

Incentive Systems In Organizations: The Scientific Perspective, Nir Keren, Matthew E. Harvey

Agricultural and Biosystems Engineering Conference Proceedings and Presentations

Organizations use incentive systems to motivate employees to contribute toward organizational success. However, a lack of understanding of how incentives affect employee behaviors lead to implementation of incentive systems that gain undesired outcomes. The presentation will review the psychological and social factors of incentive systems and how to utilize this knowledge in order the structure effective incentive systems.


Designing For Food Security: Portability And The Expansion Of User Freedoms Through The Corepds In Chhattisgarh, India, Prashant Rajan, Shweta Chopra, A. K. Somasekhar, Chad M. Laux 2016 Iowa State University

Designing For Food Security: Portability And The Expansion Of User Freedoms Through The Corepds In Chhattisgarh, India, Prashant Rajan, Shweta Chopra, A. K. Somasekhar, Chad M. Laux

Agricultural and Biosystems Engineering Publications

Food insecurity is a complex global problem, with approximately one in eight humans struggling with insufficient ac-cess to adequate nutrition. India accounts for the largest share of the world’s food-insecure population despite more than four decades of subsidized food production, distribution, and consumption. We report on the public distribu-tion of food through the COREPDS (centralized online real-time public distribution system), an ICT intervention in the public distribution system of Chhattisgarh, India. COREPDS is a theoretically driven ICT intervention that empowers households in Chhattisgarh by offering them the freedom to choose when, where, and how they wish to exercise their ...


Periodic Physical Disturbance: An Alternative Method For Controlling Sitophilus Zeamais (Maize Weevil) Infestation, Rashid A. Suleiman, Kurt A. Rosentrater, Bernard Chove 2016 Iowa State University

Periodic Physical Disturbance: An Alternative Method For Controlling Sitophilus Zeamais (Maize Weevil) Infestation, Rashid A. Suleiman, Kurt A. Rosentrater, Bernard Chove

Agricultural and Biosystems Engineering Publications

Sitophilus zeamais Motschulsky is the most important insect pest of stored maize in tropical regions. The objective of this study was to determine the practicality of periodic physical disturbance on S. zeamaismortality and its adoption by smallholder farmers in developing countries. In this experiment, treatments and control were arranged in a randomized block design with three replications and three storage times in three regions of Tanzania. Region was used as the blocking variable. A total of 108 clean 20-L plastic containers were each loaded with 10 kg of fresh white dent corn and 0.50 kg of maize infested ...


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