Vicki S. Thompson

Idaho National Laboratory

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David W. Reed

Idaho National Laboratory

Jeffrey A. Lacey

Idaho National Laboratory

David N. Thompson

Idaho National Laboratory

Damon Hartley

Idaho National Laboratory

Yoshiko Fujita

Idaho National Laboratory

William A. Apel

Idaho National Laboratory

Jordan Klinger

Idaho National Laboratory

David R. Shonnard

Michigan Technological University

Neal Yancey

Idaho National Laboratory

John E. Aston

Idaho National Laboratory

Cooperative Institutions

Idaho National Laboratory

Lawrence Berkeley National Laboratory

National Renewable Energy Laboratory

Pacific Northwest National Laboratory

Oak Ridge National Laboratory

Office of Scientific and Technical Information

Michigan Technological University

Argonne National Laboratory

National Technical Information Service

Michigan State University

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Systems Analysis Approach to Polyethylene Terephthalate and Olefin Plastics Supply Chains in the Circular Economy: A Review of Data Sets and Models

ACS Sustainable Chemistry & Engineering (2021)

Utkarsh S. Chaudhari Yingqian Lin Vicki S. Thompson Robert M. Handler Joshua M. Pearce

The environmental and economic impacts of implementing a circular economy in plastic waste supply chains are not well understood. The proposed systems analysis framework assesses environmental, social, and economic impacts of plastic waste supply chains in a circular economy. The first objective of this article is to identify data sets, models, and knowledge gaps associated with waste plastic supply chain processes, mainly in the U.S. Our literature review indicated that the best data sets exist for virgin plastic resin production, mechanical recycling, landfilling, and incineration, with the materials recovery facility being intermediate, and with chemical recycling the lowest. The second objective of this perspective is to develop an illustrative application of the framework by conducting a preliminary systems analysis of PET bottles with closed-loop recycling. The preliminary systems analysis of polyethylene terephthalate (PET) bottles utilized a linear programming optimization method. Our optimization model indicated that both chemical and mechanical recycling processes are needed to achieve a true circular economy of PET bottles with the least greenhouse gas emissions, specifically reductions of 24% when compared with the linear economy. Good quality and standardized life cycle assessment and techno-economic analysis studies are needed to better understand the environmental, economic, and social impacts of advanced sorting and chemical recycling technologies.

Circular Economy

Economic Analysis

10.1021/acssuschemeng.0c08622

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Sustainable bioleaching of critical elements from lithium ion batteries by Gluconobacter oxydans

David Reed Yoshiko Fujita Vicki S. Thompson David Gazzo Caitlin McNamara

10.1021/scimeetings.0c01866

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Development of a high temperature microbial fermentation process for butanol

Jeffery D. St. Jeor David W. Reed Dayna L. Daubaras Vicki S. Thompson

Transforming renewable biomass into cost-competitive high-performance biofuels and bioproducts is key to the U.S. future energy and chemical needs. Butanol production by microbial fermentation for chemical conversion to polyolefins, elastomers, drop-in jet or diesel fuel, and other chemicals is a promising solution. A high temperature fermentation process could decrease energy costs, capital cost, give higher butanol production, and allow for continuous fermentation. In this paper, we describe our approach to genetically transform Geobacillus caldoxylosiliticus, using a pUCG18 plasmid, for potential insertion of a butanol production pathway. Transformation methods tested were electroporation of electrocompetent cells, ternary conjugation with E. coli donor and helper strains, and protoplast fusion. These methods have not been successful using the current plasmid. Growth controls show cells survive the various methods tested, suggesting the possibility of transformation inhibition from a DNA restriction modification system in G. caldoxylosiliticus, as reported in the literature.

Bioproducts

Pentose

Cellulosic ethanol

10.2172/1260879

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Methods of combined bioprocessing and related microorganisms, thermophilic and/or acidophilic enzymes, and nucleic acids encoding said enzymes

OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information) (2013)

David N. Thompson William A. Apel Vicki S. Thompson T.E. Ward

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