Advanced Biological Fermentation Process Development

Biofuel subsidies from the Canadian government were officially phased out in 2017, which has had a significant effect on the biofuel industry in Canada. Specifically, this change will force biofuel producers to adopt novel technologies that promote more cost-efficient biofuel production, or that result in co-production of high-value products, transforming ethanol plants into multiple-product biorefineries.  This project aims to advance research for both of these areas and involves several industrial and government partners that are interested in eventual commercialization of such strategies.  


The Bressler lab will explore several byproduct streams generated during industrial processing of macroalgae, crops, and woody materials.  This will involve comprehensive compositional analyses to identify molecules/compounds that have direct or indirect commercial value, as well as exploring processing strategies, particularly enzyme treatment, which can facilitate downstream fractionation of these molecules/compounds into separate co-product streams.  Finally, following separation, the Bressler lab will examine processing strategies that can be employed to generate value-added products from these co-product streams.  As an example of one of the ongoing studies in the lab, the Bressler lab is examining the enzymatic digestion of hardwood kraft pulp to generate a sugar stream for fermentation platforms, as well as a solid residue that is more efficiently converted to cellulose nanocrystals (CNCs), a lightweight and extremely strong nanomaterial that currently sells for $1000 per kilogram.  


In addition, the Bressler lab, in collaboration with Prof. Dominic Sauvageau, is examining the incorporation of a self-cycling fermentation strategy for cellulosic ethanol production.  Recent data have provided bench-scale proof-of-concept that a cycling strategy could be applied to cellulosic ethanol production, resulting in increased productivity (amount of ethanol produced per year).  Based on these preliminary results, the Bressler and Sauvageau labs have developed a 5-L self-cycling fermentation system that will be used to optimize ethanol production from a wide variety of feedstocks.  


The identification of by-product streams that can be used as feedstock and co-product generation strategies, combined with the development of novel fermentation technologies that can be applied at commercial scale, will have significant and beneficial outcomes for the cellulosic ethanol industry.


 

Advanced Biological Fermentation Process Development: improving the process for cellulosic ethanol production by advanced fermentation strategies

David Bressler, Dominic Sauvageau, Jie Wang, Michael Chae

Activity

Decreasing costs of biofuel production through co-production of value added products from alternative feedstocks

David Bressler, Hector Vargas, Yeye Lu, Michael Chae

Activity

Development of Advanced Processing Strategies for Ethanol/CNC Co-production

David Bressler, Dominic Sauvageau, Dawit Beyene, Jie Wang, Michael Chae

Activity

Fermentation of ACAPS (Air Currents Assisted Particle Separation) byproduct streams for bioethanol

David Bressler, Yeye Lu, Michael Chae

Activity

First Approach Towards the Enzymatic Hydrolysis of Brown Seaweed for the Production of Value-Added Products

David Bressler, Hector Vargas, Michael Chae

Activity

From Batch to Cycling Strategy—Improvement in Bioethanol Productivity

David Bressler, Dominic Sauvageau, Jie Wang, Michael Chae

Activity

Improving Bioethanol Productivity through Self-Cycling Fermentation

Dominic Sauvageau, Jie Wang, Michael Chae

Activity

Initial Efforts Towards the Enzymatic Hydrolysis of Brown Seaweed for the Production of Biorefining Feedstocks

David Bressler, Hector Vargas, Michael Chae

Activity

Oral Presentation at the International Conference on Natural Fibers

David Bressler, Dawit Beyene, Michael Chae

Activity

Oral presentation at the SPARK Conference

David Bressler, Dawit Beyene, Michael Chae

Activity

Poster Presentation at the 2018 Future Energy Systems Research Symposium

David Bressler, Dominic Sauvageau, Dawit Beyene, Jie Wang, Michael Chae

Activity

Poster presentation at the Future Energy Systems Poster Session

David Bressler, Dawit Beyene, Michael Chae

Activity

Alberta Innovates Graduate Student Scholarship

Dawit Beyene

Award

Best Poster Presentation at Future Energy Systems Research Symposium

David Bressler, Dominic Sauvageau, Dawit Beyene, Jie Wang, Michael Chae

Award

Best Student Oral Presentation at SPARK conference (3rd place)

David Bressler, Dawit Beyene, Michael Chae

Award

Employing a Cycling Fermentation Strategy for the Production of Cellulosic Ethanol to Elevate Productivity

David Bressler, Dominic Sauvageau, Jie Wang, Michael Chae

Award

Graduate Students' Association Academic Travel Award

Dawit Beyene

Award

Enzymatically-Mediated Co-Production of Cellulose Nanocrystals and Fermentable Sugars

David Bressler, Dawit Beyene, Michael Chae

Publication

Improving ethanol productivity through self-cycling fermentation of yeast: A proof of concept

David Bressler, Dominic Sauvageau, Jie Wang, Michael Chae

Publication