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Bioresource and Agricultural Engineering
Theses and Dissertations--Biosystems and Agricultural Engineering
- Keyword
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- Clostridium thermocellum (2)
- 2nd generation biofuels. (1)
- Air classification (1)
- Aspergillus awamori (1)
- Automation (1)
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- Biological pretreatment (1)
- Equilibrium Modeling (1)
- Feedstock variability (1)
- Forest residues (1)
- GWP (1)
- Genetically engineered feedstocks (1)
- Haematococcus pluvialis (1)
- Kinetics (1)
- LabVIEW (1)
- Life cycle assessment (1)
- Lignin characterization (1)
- Lignin modification (1)
- Lignocellulose (1)
- Lignocellulosic bioprocessing (1)
- Mycoprotein (1)
- PH (1)
- Pretreatment (1)
- Solid State Fermentation (SSF) (1)
- Sulfur (1)
Articles 1 - 5 of 5
Full-Text Articles in Biological Engineering
Microalgae Immobilization With Filamentous Fungi: Process Development For Sustainable Food Systems, Suvro Talukdar
Microalgae Immobilization With Filamentous Fungi: Process Development For Sustainable Food Systems, Suvro Talukdar
Theses and Dissertations--Biosystems and Agricultural Engineering
Demand for sustainable food sources has increased because of the rapid growth of the world's population. In this study, microalgae cells of Haematococcus pluvialis were immobilized using the edible fungal strain Aspergillus awamori for potential food applications. The study investigated the impact of fungal loading, pellet geometry, and initial microalgae cell concentration on the immobilization performance and product characteristics. It was found that higher fungal loading and larger fungal pellets contributed to increased immobilization performance while increased initial microalgae concentration inhibited the process. Larger fungal pellets had decreased biomass density, which led to decreased surface concentration of immobilized microalgae but …
Life Cycle Assessment Of Air Classification As A Sulfur Mitigation Technology In Pine Residue Feedstocks, Ashlee Edmonson
Life Cycle Assessment Of Air Classification As A Sulfur Mitigation Technology In Pine Residue Feedstocks, Ashlee Edmonson
Theses and Dissertations--Biosystems and Agricultural Engineering
Sulfur accumulation during biofuel production is pollutive, toxic to conversion catalysts, and causes the premature breakdown of processing equipment. Air classification is an effective preprocessing technology for ash and sulfur removal from biomass feedstocks. A life cycle assessment (LCA) sought to understand the environmental impacts of implementing air classification as a sulfur-mitigation technique for pine residues. Energy demand and material balance for preprocessing were simulated using SimaPro and the Argonne National Laboratory’s GREET model, specifically focusing on comparing the global warming potential (GWP) of grid electricity versus bioelectricity scenarios. Overall, the grid electricity scenario had a GWP impact over 7 …
Fractionation And Characterization Of Lignin Streams From Genetically Engineered Switchgrass, Enshi Liu
Fractionation And Characterization Of Lignin Streams From Genetically Engineered Switchgrass, Enshi Liu
Theses and Dissertations--Biosystems and Agricultural Engineering
Development of biomass feedstocks with desirable traits for cost-effective conversion is one of the main focus areas in biofuels research. As suggested by techno-economic analyses, the success of a lignocellulose-based biorefinery largely relies on the utilization of lignin to generate value-added products, i.e. fuels and chemicals. The fate of lignin and its structural/compositional changes during pretreatment have received increasing attention; however, the effect of genetic modification on the fractionation, depolymerization and catalytic upgrading of lignin from genetically engineered plants is not well understood. This study aims to fractionate and characterize the lignin streams from a wild-type and two genetically engineered …
Automated Solid-Substrate Cultivation Of The Anaerobic Bacterium Clostridium Thermocellum, Mathew J. Ruwaya
Automated Solid-Substrate Cultivation Of The Anaerobic Bacterium Clostridium Thermocellum, Mathew J. Ruwaya
Theses and Dissertations--Biosystems and Agricultural Engineering
The organism Clostridium thermocellum grows on cellulosic substrates and produces ethanol, acetate, lactate, formic acid, and CO2. The organic acids produced alter the growth environment in which the bacteria grows and ultimately inhibit bacterial growth. One method which has been used successfully to maintain the system at acceptable growth conditions is to intermittently flush out the spent media and metabolic products and replace with new fermentation media. Our goal was to design and build an automated system that will automatically flush the spent media from the growing culture and resupply new media without manual intervention. An automated control …
Investigation Of Phanerochaete Chrysosporium And Clostridium Thermocellum For Improved Saccharification Of Lignocellulose Under Nonsterile Conditions, William E. Simon
Investigation Of Phanerochaete Chrysosporium And Clostridium Thermocellum For Improved Saccharification Of Lignocellulose Under Nonsterile Conditions, William E. Simon
Theses and Dissertations--Biosystems and Agricultural Engineering
Current research efforts are directed at developing competitive processes that can utilize lignocellulose as a feedstock for biorefineries. The purpose of this study was to investigate methods of processing lignocellulosic material so that its monosacharides can be more easily accessed for fermentation, the lack of which is hindering the economics and widescale adoption of lignocellulosic biorefining. The monosaccharides are of interest because they can be used by Clostridium beijerinckii downstream of P. chrysosporium and C. thermocellum in a sequential bioprocess to produce butanol. Butanol is an attractive biofuel because it can be utilized without modifying current transportation infrastructure. Butanol is …