Category: Research

David Shonnard, Robert Handler, and graduate student Utkarsh Chaudhari (chemical engineering) were mentioned by Waste Today Magazine in “Gauging the flows,” a story about a report they co-authored (DOI: 10.1021/acssuschemeng.2c04004) that gauges whether a circular economy is achievable for polyethylene terephthalate (PET) and polyolefin polymers in the U.S.

The report, published by ACS Publications, provides material flow and life cycle assessment data sets for these materials while also estimating total supply chain greenhouse gas (GHG) emissions and energy consumption.

The report provides material flow and life cycle assessment data sets for polyethylene terephthalate (PET) and polyolefin polymers in the U.S. while also estimating total supply chain greenhouse gas (GHG) emissions and energy consumption. Polyolefins [DT1] researched include high-density polyethylene (HDPE), polypropylene (PP), low-density polyethylene (LDPE) and linear low-density polyethylene (LLDPE).

Shonnard says phase one findings show where improvements need to be made to achieve a circular economy for plastics.

“We were able to develop a systems analysis of the entire U.S. plastics supply chain for these plastics,” he says.

Read more at Waste Today Magazine, by Megan Smalley.

Related

Material Flow Analysis and Life Cycle Assessment of Polyethylene Terephthalate and Polyolefin Plastics Supply Chains in the United States

Utkarsh S. Chaudhari, Anne T. Johnson, Barbara K. Reck, Robert M Handler, Vicki S. Thompson, Damon S. Hartley, Wendy Young, David Watkins, and David Shonnard

ACS Sustainable Chem. Eng. 2022, 10, 39, 13145–13155
Publication Date:September 22, 2022
https://doi.org/10.1021/acssuschemeng.2c04004
Copyright © 2022 American Chemical Society

• Study: Recycling accounts for tiny share of plastic’s total GHGs

The Department of Chemical Engineering (ChE) would like to congratulate the following students as winners of the External Advisory Board (EAB) Poster Session.

Undergrad Research

• First Place: Libby Umlor
• Second Place: Sheridan Waldack

Graduate Research

• First Place: Seth Kriz
• Second Place (tie): Sarvada Chipkar and Grace Dykstra

Student Organization

• First Place: Nathan Summers and Addymae Palecek (AIChE)
• Second Place: Katie Smith (Omega Chi Epsilon)

These posters and their research are posted in the hallways (Chem Sci second and third floors). All faculty, staff and students are encouraged to come see what research our students and faculty are involved in.

By Chemical Engineering.

The Michigan Tech Graduate Student Government (GSG) organized a poster presentation at the 2021 Alumni Reunion in the Rozsa Center on August 6. Presentations are also posted virtually. Among the presenters was Seth A. Kriz, a PhD Student in Chemical Engineering.

Seth A. Kriz

Area of Focus

Bioseparations, Vaccine Manufacturing

Topic

Purifying viral vaccines by two-phase aqueous extraction

Project Summary

The World Health Organization (WHO) estimates as many as 650,000 people die annually from the seasonal influenza virus. Viral vaccines are an effective tool to combat this enormous problem, but current manufacturing purification methods suffer from high costs and yields of less than 30%. A switch from batch to fully continuous processing, which is acknowledged by the FDA to increase capacity and product consistency, is necessary to meet demand. Aqueous two-phase systems (ATPS) constructed of inexpensive, environmentally-friendly polymers and salts are an ideal method to replace traditional chromatography steps that rely on costly resins and operate discontinuously. Previously, we achieved over 80% recovery of two model viral products in the polymer phase of ATPS with high host cell protein and DNA removal. However, the purified viral product is too viscous for further polishing by traditional filtration methods. Thus, a polymer removal step is required. Here we developed a second stage of ATPS to back-extract the virus from the polymer-rich primary product into a gentle salt solution ready for polishing. Preliminary results demonstrate that back-extraction completes a fully continuous viral particle extraction process using ATPS.

Play Purifying viral vaccines by two-phase aqueous extraction – Seth Kirz video

Purifying viral vaccines by two-phase aqueous extraction – Seth Kirz

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Poster Session

First place was won by Utkarsh Chaudhari from the Department of Chemical Engineering for his presentation titled “Systems Analysis Approach to PET and Olefin Plastics Supply Chains in the Circular Economy.”

View the Poster Presentations, Group 2, and the PDF.

This year’s Graduate Research Colloquium organized by the Graduate Student Government was hosted virtually due to COVID restrictions. There were in total 48 presentations — 17 poster presenters and 31 oral presenters.

Poster presentations took place in a pre-recorded video style and the oral sessions were hosted live via Zoom. You can watch all the poster videos and recordings for the oral sessions here. Each presentation was scored by two judges from the same field of research.

Participants were able to gain valuable feedback from these judges before presenting their research at an actual conference. It was stiff competition amongst all presenters.

A hearty congratulations to all the winners at this year’s Colloquium. The Graduate Student Government would like to thank everyone: presenters, judges, volunteers, and GSG supporters, for making this a great event despite COVID-19 restrictions. GSG would also like to hear ways in which this event could be improved next year using this feedback form.

By Graduate Student Government.