DOE funds new technologies in plastic recycling

Bundled plastics

ISTC is part of a national team to develop artificial intelligence technologies to sort non-recyclable plastics so they can be reused for fuels. The U.S. Department of Energy has awarded the team $2.5 million to complete the three-year project.

Plastics recycling in the U.S. typically requires manual sorting as workers pick out the useful kinds of plastic from conveyor belts and discard the non-recyclable types. This process is labor-intensive and expensive. In this new project, scientists are using high-tech sensors developed by UHV Technologies, Inc. and commercialized through its spin-off Sortera Alloys that will detect specific chemical-based “fingerprints” of each kind of plastic polymer, classifying them through a new system and sorting them into different bins.

“Sensor fusion and artificial intelligence algorithms used in the process will increase the speed and accuracy of plastic sorting, eventually making the technology more economical with a cost goal of less than $30 per ton,” said BK Sharma, co-principal investigator of the project.

Sensor fusion will generate a unique fingerprint for plastic pieces, while deep learning and artificial intelligence algorithms will create a novel classification system for the plastics.

Another challenge for the project is to reduce plastic contamination, a major reason why plastics end up in landfills. One of the project goals is to develop low-cost methods that decrease contamination to less than 5 percent. Improving the purity of plastic waste increases its potential and value for reuse.

A successful process that produces clean plastics, separated by type, could offer marketable products while diverting non-recyclable materials (plastics #3–#7) from landfills. Sharma’s primary role will be to use the catalytic pyrolysis process to determine if the plastics can be used to produce valuable products, primarily diesel or aviation fuels along with gasoline, naphtha, and waxes.

Besides ISTC, the team includes:

  • UHV Technologies, which has created sorting technologies for other products;
  • The Idaho National Laboratory, to complete chemical composition analysis and screening techniques; and
  • The Solid Waste Authority of Palm Beach County, which will help to integrate the proposed technology into the existing recycling industry.

“At the end of the project, if we can come up with a process that can convert mixed plastic into a low-cost feedstock to produce different types of fuels and other products, that will be a big success,” Sharma said.

—-

Media contact: BK Sharma, 217-265-6810, bksharma@illinois.edu
news@prairie.illinois.edu

This story originally appeared on the Prairie Research Institute website. View the original story here.

Redesigned Sustain Springfield Green Map Released

The Urban Action Network has partnered with Lincoln Land Community College’s GIS Program since 2017 to provide an online map of all things “green” in Springfield.  The Sustain Springfield Green Map (SSGM) is a user-friendly, GIS-based, online resource that guides residents, visitors, organizations, and businesses to sustainable or environmentally-friendly services, sites, and amenities. Map users can easily find recycling locations, community gardens, car charging stations, and much more. The SSGM has been redesigned to make searching even easier.

This completely redesigned Map streamlines category headings, tells its story better with tabs and graphics, and includes a new Special Projects section in the Gallery. The special projects mini-maps currently include Springfield’s tiny libraries and micro-pantries and the section provides an opportunity for more LLCC GIS students, the public, and special audiences to contribute to its development through emailing suggested additions. A Steering Committee (see Supporters tab in the online map) formulates new ways to expand Map content and engage the public.

The Sustain Springfield Green Map is a project of the Urban Action Network (UAct) which provides executive oversight and operational support. The original map was created as a classroom project by Jordyn Lahey, an LLCC GIS student. The SSGM is hosted by LLCC under the guidance of Geography Professor, Dean Butzow and is maintained as an in-kind service by LLCC GIS Instructor, Rey de Castro and Think GeoSpatial Educator, Jenni Dahl, who are also members of the Steering Committee.

“Springfield is remarkably green for a city of its size and we must continue to cultivate and support sustainability in Springfield.  The Sustain Springfield Green Map is a dynamic tool that showcases Springfield’s environmental services, sites, and amenities placing the information at our fingertips,” said UAct President Sheila Stocks-Smith. “Please share the Map widely with your family, friends, and social networks, and perhaps the Sustain Springfield Green Map can help inspire us all to make conscious choices and act collectively to make every day Earth Day.”

See the newly redesigned Green Map online at https://arcg.is/u14Hq.

US national recycling goal announced, comments sought on National Recycling Strategy

America Recycles Day is celebrated on November 15 annually and serves as an opportunity to raise awareness of consumption, proper materials management options, and procedures, and to encourage Americans to commit to increasing and improving their recycling actions in the coming year.  It’s also an opportunity to highlight the importance of recycling not only for environmental integrity but also for the US economy. According to the US EPA, on a national average, there are 1.17 jobs, $65,230 wages, and $9,420 tax revenues attributable, for every 1,000 (US) tons of recyclables collected and recycled.

On November 16 and 17, 2020, EPA hosted its America Recycles Innovation Fair and Summit in a virtual format. This year’s events were of particular importance due to the announcement of a national recycling goal during the Summit. The goal is to increase the national recycling rate to 50% by the year 2030, or “50 by 30,” in its abbreviated form.

US EPA 50 by 30 logo

To provide some context, EPA regularly releases updated data on the management of Municipal Solid Waste (MSW), or the discarded materials generated, landfilled, or recycled from US residences. Because it takes a great deal of effort and coordination to gather and analyze all the data required for a national overview, reports typically reflect the reality of material flows from a few years prior. Last week, EPA released the 2018 Advancing Sustainable Materials Management: Facts and Figures report. The data reveal that “the recycling rate (including composting) was 32.1 percent in 2018, down from 34.7 percent in 2015.”

Increasing the recycling rate to 50% in the US would be a significant improvement. Seeing our national recycling rate increase, instead of continuing the disappointing downward trend, would be great news for those of us who care about sustainable materials management.

US EPA infographic detailing the environmental and economic impact of recycling and composting
US EPA Infographic

The reasons behind the underwhelming US recycling rate are many and complex, and we’ll only touch on some of the factors here. As is the case with so many environmental issues, there is a patchwork of policies and laws across the different states. With no federal policy or national or global coordination among impacted industries about labeling and product design to facilitate material reclamation at the end of a product’s life, there are a number of issues. These include confusion about what can be recycled, technical issues related to differing product structure, mixed messages, and inefficient implementation of programs.

Even within states, materials accepted in recycling programs often differ widely from one municipality or county to another. That’s because even materials that are technically recyclable (able to be recycled scientifically) may not be practically recyclable in a given location, due to lack of processing infrastructure, economic factors that make collection and processing of materials infeasible (e.g. availability of end markets, the volume of a material that can be collected in a given timeframe, etc.), and lack of clear, effective information for consumers to follow.

US EPA graph showing recycling and composting rates from 1960 to 2018
US EPA graph showing recycling and composting trends over time

There are also issues of “wishcycling”–when people want to believe an item is recyclable and put it into their bins without knowing if it’s accepted in their local program. This leads to contamination of batches of genuinely recyclable materials, potentially rendering them useless, as well as posing risks for recycling facility workers.

The way materials are collected can impact contamination levels and the quality or marketability of recycled feedstocks. Single-stream collection, for example, in which all materials accepted for recycling by a program are placed in the same collection bin, leads to higher contamination.  In the case of glass, this often leads to breakage and a reduced rate of reclamation alongside increased hazards.

International policies, such as the infamous “China ban” in which China stopped accepting imports of certain materials from countries like the US, have left recyclers and program coordinators with a domestic glut of materials for which there aren’t adequate end markets. In some cases that means materials separated by consumers for recycling have been sent to landfills. In the worst cases, recycling programs have ended due to budget constraints. All of this has lead to a lack of faith in recycling programs and options among US consumers, even where programs are available.

To address these various challenges, EPA has developed a draft National Recycling Strategy that identifies objectives and actions needed to create a stronger, more resilient U.S. recycling system. The draft strategy builds on The National Framework for Advancing the U.S. Recycling System, released in November 2019. That Framework was the result of collaborative efforts by stakeholders from across the recycling system launched during the first America Recycles Day Summit in 2018.

Today, recommended actions within the draft National Recycling Strategy are organized under three strategic objectives:

  • Reduce contamination in the recycling stream
  • Increase processing efficiency
  • Improve markets

The draft National Recycling Strategy is open for public comment until December 4, 2020. To leave a comment, go to https://www.regulations.gov/ and search for the docket EPA-HQ-OLEM-2020-0462. This is your opportunity to let EPA know your concerns, perceived challenges and barriers to progress, ideas to effectively increase our national recycling rate, and any suggestions for additions or improvement to the actions already outlined.

When you enter the docket number as listed above, you’ll see a “Memo Opening Docket for Public Comment” in the search results. Open that, and if you see “Open Docket Folder,” open that as well so you can view the primary document (Memo Opening Docket for Public Comment, with a “Comment Now” button next to it) plus two supporting documents–the actual text of the draft National Recycling Strategy and an executive summary of the text. (Note, if you’re redirected to a beta version of the new regulations.gov website, the process will be slightly different and you won’t have to open the docket folder to see the three relevant documents). You will also be able to view all previously submitted comments if you choose. Comments can be made anonymously.

To simplify the submission process,  you may want to prepare your comment in Microsoft Word, Google Docs, or similar program ahead of time, and copy and paste your thoughts into the online form. Note that if you want to refer to documents in your comment, you can upload supporting files via the comment form as well. For example, if your community has a particularly effective consumer education publication, you might want to provide it as an example or include a copy of a recycling policy, journal article, etc. For further guidance, consult the regulations.gov “Tips for Submitting Effective Comments” document, available in PDF format. Additional guidance on the comment submission process and contact information if you experience difficulty is available at https://www.regulations.gov/help.

Meanwhile, if you represent a US-based organization interested in working toward a more resilient materials economy, consider signing the America Recycles Pledge. This signifies your willingness to participate in ongoing dialogues and to take action with other pledge signers to improve America’s recycling system. Learn more at https://www.epa.gov/americarecycles/forms/america-recycles-pledge.

graphic version of the America Recycles Pledge

Additional Resources

UIC releases Sustainable Materials Management Plan developed with ISTC

Document cover, saying "Sustainable Materials Management Plan," along with the UIC logo and a photo of trash arranged to form the logo.The University of Illinois at Chicago (UIC) recently released a Sustainable Materials Management Plan, a concrete step in the university’s goal to become a Zero Waste Campus.

During the past academic year, many stakeholders observed current waste management practices and coordinated and conducted a waste characterization study to represent campus-wide activities. Study results and annual material generation data were analyzed and extrapolated, campus focus groups were held to provide input for ideal material management, and the research and recommendations were collated into one comprehensive plan to increase waste diversion and ultimately achieve a zero-waste campus.

UIC partnered with the Illinois Sustainable Technology Center’s (ISTC) Technical Assistance Program to conduct the waste audit, engage stakeholders, and spearhead plan development. The plan identifies nearly 100 strategies for waste reduction and diversion and was informed by the results of a November 2019 waste audit, along with insightful input received from students, faculty, staff, and community members.

UIC’s Waste Characterization Study

The waste characterization study included more than 3,300 pounds of trash from 14 buildings and outdoor campus collection bins sorted into 32 Multiple bins and buckets, each containing a different type of waste identified in the waste auditmaterial categories.

The audit team used an activity zone approach to capture waste from buildings by use, such as administrative offices, academic and lab settings, student residence halls, and multi-use spaces.

Landfill and recycling bins from various outdoor areas of campus, such as along internal walking paths, busy urban corridors, and in parking structures, comprised an “On-the-go” activity zone. The study team and an enthusiastic group of student, staff, and faculty volunteers sorted the waste over the course of a wintery week.

UIC’s Sustainable Materials Management Plan

Co-led by ISTC, and UIC’s Office of Planning Sustainability and Project Management (PSPM), a team of staff, faculty, and students from various departments, external partners and industry experts developed the Sustainable Materials Management Plan.

Together team members worked to document and understand current waste management practices and analyzed waste generation. The Plan categorizes campus waste to show what is avoidable, currently recyclable, compostable, potentially recyclable, and non-recoverable.

The data revealed that 33% of the overall waste stream on campus is compostable material, such as food scraps. Nineteen percent of the waste stream is composed of recyclable materials such as paper or plastic bottles. Eighteen percent of the waste stream on campus consists of avoidable materials such as paper towels and disposable beverage cups. Five percent of the waste stream is comprised of potentially recyclable material such as plastic film and gloves that could be diverted through source-separated streams.

The remaining 24% of the waste stream consists of materials that are currently non-recoverable, i.e. items for which recovery end markets or programs do not yet exist, or for which solutions are not yet available at UIC or in surrounding areas. This includes items like single-use equipment and other non-recyclable paper, glass and plastic items.

“Data has been a critical part of our success in reaching almost a 50% recycling rate at UIC over the past decade, even while the number of students on campus has grown by 20%. With the help of data, the recycling program at UIC has vanquished a once prevalent view that Chicago doesn’t recycle. With the report from the ISTC led waste audit, the volume of food scraps, and the presence of currently recyclable materials point to impactful steps we must take in waste reduction, outreach, and education,” stated Joe Iosbaker, UIC’s Recycling Coordinator.

Bar graph showing the percentage of various types of materials present in the UIC waste stream during the November 2019 waste audit

The study team also gathered input from members of the campus community through an online survey and a series of focus groups. Discussions shed light on knowledge, perceptions, and expectations of waste management infrastructure, the overall campus culture surrounding resource recovery, waste-related priorities, and challenges. This feedback from the UIC community was used to develop strategies to increase recycling and waste reduction. Through this multi-layer process, UIC now has a comprehensive roadmap to build from the 47% recycling rate today and prime the conditions for a zero-waste campus by 2050.

“The comprehensive presentation in the Materials Management Plan provided by ISTC gives us a greater understanding of the tasks we have,” Iosbaker asserted. Assistant Vice-Chancellor and Director of Sustainability Cindy Klein-Banai reinforced those sentiments stating, “This study has provided the data and next steps for robust strategies for reaching our Zero Waste Goal within the UIC Climate Commitments. It also demonstrates the need for broad responsibility in developing our program across all units and departments of the university.”

“ISTC’s Zero Waste team acknowledges the great potential of a comprehensive, campus-driven Sustainable Materials Management Plan,” shared April Janssen Mahajan, Sustainability Specialist at ISTC. “We fully embraced the challenges and opportunities this project offered to help UIC reconsider, reimagine and redefine campus waste and materials management in support of the university’s mission to become a Zero Waste Campus.”

Technical Assistance Program helps UI Facilities & Services improve recycling collection

History and context

In 2008, the University of Illinois at Urbana-Champaign (UI) signed the American College & University Presidents’ Climate Commitment, becoming part of a network of institutions of higher education committed to campus carbon neutrality by the year 2050. UI developed an Illinois Climate Action Plan (iCAP) as a roadmap to reducing the campus carbon footprint and achieving carbon neutrality. The iCAP identifies relevant goals, objectives, and potential strategies in the following categories: energy conservation and building standards; energy generation, purchasing, and distribution; transportation; water and stormwater; purchasing, waste, and recycling; agriculture, land use, food, and sequestration; carbon offsets; financing; education; outreach; and research.

Cover of 2015 Illinois Climate Action PlanSince the development of the iCAP, the Illinois Sustainable Technology Center (ISTC) Technical Assistance Program (TAP) has worked with UI Facilities and Services (F&S) on multiple projects to facilitate achievement of a 45% campus waste diversion target by 2020, as part of the overarching campus carbon neutrality efforts. In 2014 and 2015, TAP gathered baseline data on the types and magnitude of waste generated on campus and identified opportunities for waste reduction, diversion, and improvement of material collection. The results of those efforts can be found in the 2014 Baseline Waste Characterization Study and the 2015 Recycling and Waste Reduction Opportunity Assessment. An educational project coincided with the second phase of this waste characterization effort, in which TAP staff guided UI students in the creation of a sculpture crafted from materials from the campus waste stream. The sculpture, along with campus waste characterization data and facts related to waste generation and management in the US, were displayed at the Krannert Center for Performing Arts during Earth Week in 2016, to raise awareness about campus materials management. In 2015, TAP also collaborated with F&S to retrofit existing refuse containers located on the main Quad, creating combined waste and recycling stations in an effort to improve capture of recyclable materials.

TAP has since collaborated with campus Waste Transfer Station (WTS) staff to increase diversion rates across campus, as well as improve the efficiency of current waste management operations. Key components of this collaboration have included the development of a streamlined materials tracking system, as well as analysis of material flows through and from campus buildings to the WTS, to identify opportunities for process improvement.

In 2018, TAP worked with F&S staff to digitize collection truck weight tickets and create a new online tracking portal. The portal, rolled out in December 2018, allows WTS staff to measure, analyze, and report on the material moving through the system. This level of detail can allow targeted modifications to hauling routes, pickup frequency, and collection container deployment to improve capture of specific waste streams, as well as provide data to inform potential outreach efforts and policy changes.

Recent efforts to improve collection of recyclables

In 2019, ISTC and WTS staff began an analysis of collection practices within buildings with the explicit intent to increase the capture of source-separated recyclables. TAP staff shadowed building service staff to identify current practices and opportunities for improvement. The processes for handling waste and recyclables for typical academic and residential buildings were mapped out, including movement of waste materials from the building to dumpsters, and ultimately to the WTS. TAP staff also worked with F&S to document (in terms of current deployment and unused inventory) the number and variety of landfill and recyclable collection bins found in buildings across campus.

Examples of the variety in size, color and signage of older collection bins on campus.
Examples of previous generations of bins and associated signage found on campus.

This information allowed TAP to make various recommendations to UI F&S related to:

  • building construction and renovation standards for recycling space allocation;
  • collection container allocation, placement, and related training for Building Service Workers (BSW);
  • updating collection containers to improve clarity and consistency across campus;
  • improved signage for clarity and consistent messaging;
  • use of bin liners and existing dumpsters to streamline material flows to, and separation at, the WTS; and
  • a campus-wide recycling campaign.

TAP is currently working with F&S on implementation of these recommendations. At the end of 2019, new collection containers were identified which would collocate landfill (trash) bins and bins for the two types of recycling streams on campus—mixed paper and aluminum cans plus bottles. The new collections containers use color-coding to distinguish the different streams—black for landfill, green for the mixed paper stream, and blue for the combined aluminum cans and bottles. Matching directional signage featuring pictures of example materials appropriate for each waste stream attaches to the back of the bins to assist with proper source separation. A URL for more information on campus recycling is also prominent on the bin signs. Images on the container access doors (for emptying the bins) reinforce proper placement of materials. The containers are themselves constructed from at least 1000 recycled plastic milk jugs, reinforcing the importance of not only recycling but  “closing the loop” by using products made from recycled materials.

New collection bin station with sections for landfill, mixed paper, and aluminum cans plus bottles
New collection containers being deployed on UI campus.

105 containers have been deployed over 30 buildings, beginning primarily in first-floor hallways. Additional containers are being obtained and deployed to locations keeping factors such as building occupancy and status of currently existing collection infrastructure in mind. F&S sees the deployment of the new containers as a key factor in raising awareness of recycling opportunities and processes on campus, as well as combating persistent misconceptions about campus recycling practices.

The new collection containers and implementation of other recommendations made by ISTC’s TAP not only foster achievement of campus iCAP goals but also relate to the recently released F&S Strategic Plan 2019-2023, which includes key performance indicators for diverting waste from landfill in its “Lead in Energy Management and Sustainability” section.

For further information

Solar panel disposal problem surges as solar energy use grows

Solar energy panels can be recycled, but most end up in landfills. How to handle broken or older panels in Illinois is a challenge that takes a statewide collaboration to figure out, according to Jennifer Martin, coordinator of the Solar Module Recycling Initiative at the University of Illinois’ Illinois Sustainable Technology Center (ISTC).

Solar modules used at solar energy farms and in homes are made from different technologies, all with valuable, recoverable, recyclable materials. No national regulations exist on how to discard panels, but some may contain toxic compounds such as arsenic, cadmium, and lead that can leach into the environment if landfilled.

In addition, the large size of solar panels can potentially fill up landfill sites quickly.

Given that solar power is the fastest growing energy source nationwide, and with a lifespan of 25 to 30 years, solar panels installed in the 2000s and before will soon need to be replaced. Also, panels that are broken in shipping or damaged by storms will be disposed of.

With around 360,000 modules currently installed in Illinois, an additional 6 million solar panels will be installed in Illinois by 2025, posing a significant solid waste problem by mid-century.

“Solar energy is a relatively new industry in the Midwest,” Martin said. “There are many factors that make it difficult to predict the number of solar modules that will come offline in Illinois. However, this looming threat is an opportunity to figure out how to prepare now for recycling and reuse options before a plan is urgently needed.”

Through the ISTC initiative, Martin is working with stakeholders in various national and state organizations to find solutions to the solid waste disposal of solar modules. Organizations include the Illinois Environmental Protection Agency, the Solar Energy Industries Association (SEIA), the National Renewable Energy Laboratory, and others. To date, less than 1 percent of decommissioned solar modules are being recycled, according to SEIA.

The collaborators are working to determine the best options for states to prepare for end-of-life solar recycling and reuse. Predicting the amount of waste headed for the landfills is important, as well as finding locations to recycle the waste.

Some of the specific challenges with developing a recycling plan is the lack of publicly available information on recycling and recovery costs and the basic infrastructure necessary to collect and transport the modules to recycling centers once they become obsolete.

Modules that have declined to about 70 percent effectiveness can still have a useful life and be reused for schools, nonprofit agencies, and other users.

Washington State was the first to pass a solar stewardship bill requiring manufacturers selling solar modules to have an end-of-life recycling program for their products. Through this program, regional take-back locations accept panels with no cost to solar panel system owners.

New Jersey’s recently established Solar Panel Recycling Commission has been tasked to investigate options on recycling and other end-of-life management recommendations for the state.

In Illinois, collaborators hope to have a system in place before millions of panels are ready for disposal in the near future.

“The Midwest is a little behind other regions in the U.S. on adopting solar energy,” Martin said. “With this and other initiatives, the Midwest is forging ahead on finding solutions to a problem that will only become more pressing with time.”

Visit the ISTC website to learn more about the initiative and solar energy disposal in Illinois.

Media contacts

  • Jennifer Martin, Environmental Program Development Specialist, 217-300-3593; jm33@illinois.edu
  • Tricia Barker, Associate Director for Strategic Communications, 217-300-2327, tlbarker@illinois.edu

ISTC research included in new report on developing circular supply chains for plastics

B.K. Sharma - senior research engineer, Illinois Sustainable Technology Center (left) and Sriraam R. Chandrasekaran, lead research engineer. Photo by L. Brian Stauffer
B.K. Sharma – senior research engineer, Illinois Sustainable Technology Center (left) and Sriraam R. Chandrasekaran, lead research engineer. Photo by L. Brian Stauffer

report recently released by the Center for the Circular Economy, a project of Closed Loop Partners, surveys current landscape of research focused on converting waste plastics into safe and high-quality materials, as well as the scale of opportunity for these technologies to meet demand.

The work of ISTC researchers BK Sharma and Sriraam Chandrasekaran are included in the report’s technology profiles appendix. They recently developed a nontoxic, nondestructive and energy-efficient chemical solvent process to recover polymers from the complex plastic blends found in electronic waste. They published their results in the journal ACS Sustainable Chemistry and Engineering. The research was funded by HOBI International and the Hazardous Waste Research Fund.

The report strongly encourages stakeholders to invest in new technologies related to plastics recycling, an area with potential revenue opportunities of $120 billion just in North America .