Expert viewpoint: Could Legionnaires’ bacteria lurk in idled buildings?

Editor’s note:  To contact Jeremy Overmann, email joverman@illinois.edu.

How can I help influence the takeout containers restaurants are purchasing?

Have a question about living a greener life? Joy Scrogum's work focuses on food waste, waste reduction, and reuse. Ask her anything about being more sustainable. We'll post her answers next week.This is the first in a periodic series of Ask Me Anything (AMA) posts where ISTC features a researcher on our Facebook, Twitter, and LinkedIn accounts and solicits questions from our followers. We post the answers on the original platform and also aggregate them into a wrap-up blog post. Our first featured researcher is Joy Scrogum.

Question (from Facebook): I like to order takeout food from the many amazing restaurants in my neighborhood, but cringe at all the waste this generates. Some of this serveware I can compost and recycle, but some of it I cannot.  How can I help influence the takeout containers restaurants are purchasing?

Joy: I’m glad you’re thinking about this. consumers really have more power than they tend to think. First of all, let me note that during the current pandemic, we all have to make allowances for the takeout containers being used by our local restaurants. It’s fabulous that they’re open and delivering. It’s important to support them during this difficult time and recognize that exploring new packaging is, of course, not a priority for them now. One thing you can do when ordering takeout is remember to ask a restaurant to not include unnecessary disposable items with your order (e.g. plastic utensils, napkins, condiment packets, plastic straws, etc.). That will not only prevent waste, but also save them a little money and reduce the opportunity for contamination as we practice social distancing.

When we’ve gotten past this pandemic, the easiest thing you can do is voice your concerns about packaging to the manager of a restaurant, along with your reasoning (e.g. polystyrene foam, aka Styrofoam, its persistence, difficulty/inability to recycle in your area, etc.). Always start on a positive note by letting them know what you enjoy about their food and service, if you’re a long-time customer, etc., and then tell them what’s troubling you, so the conversation doesn’t seem like an attack.

It’s also important to bear in mind that businesses, especially small ones, are making decisions based on costs. So when you speak or write to someone with your concerns, acknowledge that price is an issue for them and be prepared to provide some tools that might help them choose “greener” options available at similar or better prices than what  they’re currently using. The Product Stewardship Institute (PSI) has developed the Foodware Cost Calculator, which allows restaurants or other foodservice operations to compare the costs of their currently used disposable products to reusable options (e.g. plastic utensils vs. real silverware) or alternative disposable items (e.g. recyclable, compostable, made with recycled content, etc.). PSI also has a guidance document that can help businesses reduce their plastic footprint, and understand the benefits, called 3 Steps to Reduce Plastic & Benefit Your Business. You might also point out examples of preferable packaging used by other businesses in your area or elsewhere to help make the case for what is possible. A few examples that come to mind include Just Salad, which uses reusable to-go packaging, and Farmer’s Fridge, which operates fresh-food vending machines using recyclable and reusable containers. 

You can always use existing consumers ratings mechanisms, such as Yelp, Google, or Facebook, to express support for businesses using greener packaging or dismay at a restaurant with great food but problematic to-go packaging. An interesting new app from developers in Colorado is called PlasticScore. It allows you to provide feedback to restaurants on single-use plastic, as well as see waste-related ratings of nearby restaurants so you can support businesses practices that align with your values. It’s pretty new (just launched in March 2020), so you might not find a lot of information applicable to your area right now, but you could certainly contribute your own feedback to help expand their database.

Another thing to keep in mind related to compostable packaging is that sort of packaging only degrades properly in commercial composting operations (e.g. services that pick up compostables from a business or via residential drop-off or curbside composting programs). Backyard compost piles don’t attain the proper temperatures or other conditions to effectively break down those items. So before asking a restaurant to switch to compostable items, check to see if commercial composting is available in your area. It’s unfortunately true that such service is not available in many areas of Illinois.

I’m a proud member of the Illinois Food Scrap Coalition (IFSC), which is working to expand food scrap composting in our state. Check the IFSC’s online list of haulers and compost processors to see if commercial food scrap composting exists in your area. If so, you can let your favorite restaurants know, and also point out that if they decide to start composting their food scraps and compostable packaging, they could receive recognition through IFSC’s We Compost program.

Finally, you can influence restaurants and other diners through your own example. When we’re all able to dine-in at our favorite restaurants again, consider taking your own reusable food storage container or foil from home for packing any leftovers, instead of asking the restaurant for a box. When people see you doing this, it can spark conversation about packaging and may inspire someone else to do the same. Many coffee shops offer discounts for folks who bring in their own reusable mug. Be sure to ask if your favorite shop does this, so they know there is interest, and remember to take advantage of such incentives where they exist.

Note: ISTC does not endorse, either explicitly or implicitly, any particular manufacturer, vendor, product or service. Information about specific products, manufacturers or vendors is provided for reference only.

COVID-19 and Facility Water Systems Management

ISTC’s Institutional Water Treatment (IWT) program has developed a set of recommendations for facility managers to help them maintain their water systems in light of new federal, state, and local COVID-19 policies that change building use patterns.

If you have questions or need assistance, contact:

  • Jeremy Overmann: joverman@illinois.edu or (217) 333-5903
  • Angie DiAscro: DiAscro2@illinois.edu or (217) 300-3882
  • Cameron Dillion: dillion2@illinois.edu or (217) 244-0179
  • Jenn Tapuaiga: jenn210@illinois.edu or (217) 300-0084
  • Mike Springman: springma@illinois.edu or (618) 468-2780

New publication: Salvage Yard Environmental Guidebook and Self-Audit Checklist

ISTC’s  Salvage Yard Environmental Guidebook and Self-Audit Checklist helps salvage yard operators better understand the environmental issues, comply with state and federal environmental regulations, and implement best management practices to minimize risks and liabilities.

The manual details best management practices for safely managing all types of waste found in salvage yards, including spent air bags and lithium-ion batteries, as well as pollution prevention options.

If you operate a salvage yard and would like assistance with improving your environmental performance and bottom line, contact our technical assistance program.

ISTC delivers Contaminants of Emerging Concern Report to Illinois General Assembly

In 2018, Illinois’ governor signed House Bill IL-HB5741, which amended the University of Illinois Scientific Surveys Act. The bill directed the Prairie Research Institute (PRI) to conduct a scientific literature review of contaminants of emerging concern in wastewater treatment plant effluent. It also requested that PRI compile a listing of the specific actions recommended by various state and federal agencies to address the environmental or public health concerns associated with these chemicals.

The final report was filed with the General Assembly earlier this week. It reviews the current state of scientific knowledge about contaminants of emerging concern (CEC) in wastewater treatment plants (WWTPs), discusses concentrations of CEC in WWTPs, and reviews existing treatment technologies and U.S. federal and state laws.

The report is available in IDEALS.

Microplastics may increase the risk of PFAS entering the Lake Michigan food web

This post originally appeared on the Illinois-Indiana Sea Grant web site.

by Irene Miles, Illinois-Indiana Sea Grant

Maggie Oudsema, a research assistant at the Robert B. Annis Water Resources Institute (AWRI), Grand Valley State University and John Scott, Illinois Sustainable Technology Center, lower microplastic samples into Muskegon Lake. (Photo courtesy John Scott)
Maggie Oudsema, a research assistant at the Robert B. Annis Water Resources Institute (AWRI), Grand Valley State University and John Scott, Illinois Sustainable Technology Center, lower microplastic samples into Muskegon Lake. (Photo courtesy John Scott)

Ever-present in our world, it’s not surprising that plastics have been found in waterways virtually everywhere, mostly showing up as microplastics. Another group of contaminants, PFAS (per- and polyfluoroalkyl substances) are, likewise, being detected in the environment all over the world.

All of these contaminants pose concerns on their own, but now research funded by Illinois-Indiana Sea Grant has found that PFAS can stick to microplastic particles in the water, increasing the likelihood that they will end up in the food web.

PFAS are human-made chemicals that are used in many common products such as non-stick cookware, pizza boxes and stain repellent fabric. Qualities that have made them useful—for example, they are very stable and are resistant to water and oil—can contribute to concerns about PFAS. They don’t easily break down in lakes, rivers, wildlife and people. PFAS can have health effects, such as increasing the risk of cancer, decreasing fertility, and impacting growth and learning in infants and children.

Plastics can break down in the environment to microscopic size or they can enter lakes and rivers as microplastics already—for example, as tiny fibers that wash off our clothing. Once in the environment and our waters, microplastics stick around, and like PFAS they do not easily biodegrade.

John Scott, an analytical chemist at the Illinois Sustainable Technology Center, led a team of researchers to understand the extent to which PFAS and other contaminants attach to microplastics in waterways.

His team used three common types of plastic, testing them in the waters of Muskegon Lake, which sits adjacent to Lake Michigan along the Michigan coast. They also did similar testing in a controlled environment using laboratory water.

Microplastic samples were submerged in the nearshore waters of the channel connecting the two lakes and in the middle of Muskegon Lake, for one month and three months in both locations, and in the laboratory for one month.

Rachel Orzechowski, a research assistant at AWRI, Grand Valley State University, sets up microplastics samples to submerge for 1-3 months in Muskegon Lake. (Photo courtesy John Scott)
Rachel Orzechowski, a research assistant at AWRI, Grand Valley State University, sets up microplastics samples to submerge for 1-3 months in Muskegon Lake. (Photo courtesy John Scott)

The researchers found that regardless of location, length of time or type of plastic tested, PFAS in Muskegon Lake adhered to microplastic particles—ranging from .052 nanogram to .87 nanogram of PFAS for each gram of plastic. Interestingly, the amount of PFAS sticking to the microplastic in laboratory water was notably less.

“The difference may be due to associated organic matter or the presence of metals or biofilm, which is a collection of bacteria that grows on microplastic particles in the lake, making the surface easier to stick to,” said Scott. “This would also explain the wide variability that we found in PFAS concentrations on microplastic samples that were identical in substance and treatment. We did not find this degree of variability in the controlled experiments.”

Biofilm is a collection of microorganisms that grow on a variety of surfaces. (Graphic Joel Davenport/Illinois-Indiana Sea Grant)
Biofilm is a collection of microorganisms that grow on a variety of surfaces. (Graphic Joel Davenport/Illinois-Indiana Sea Grant)

Scott points out that the concentration of PFAS they found attached to microplastics in the study is quite low—for perspective, a nanogram is a billionth of a gram—but there is more to the story. “We submerged our samples for limited time, but some studies have estimated that half of microplastics in the environment have been there for 10 to 15 years. And many of these plastic particles in the water are smaller than we used in this study, so with similar mass they have more surface area, which could result in more adsorption.”

Another consideration is that PFAS are only one group of chemicals that can attach to microplastics. Scott said, “We don’t know the implications of what could be a cocktail of contaminants—like PCBs or PAHs—adhering to these particles and ingested by fish or other organisms.”

At the same time, many plastics may already contain additives such as heavy metals, flame retardants and plasticizers that can further exacerbate this issue. “These microplastics-associated pollutants can act synergistically when an organism is exposed to them,” said Scott.

Recent IISG-funded research at Loyola University has shown that fish in three Lake Michigan tributaries are ingesting microplastics. Biologists John Kelly and Tim Hoellein found that 85% of the fish tested contain, on average, 13 pieces of microplastic in their digestive tract.

Does this translate to a level of concern for fish regarding PFAS and other chemicals that may be in these waters and may be attached to microplastics?

“We just don’t know,” said Scott. “We don’t know if PFAS ingested on microplastics stay with the fish, we don’t know at what rate fish ingest microplastics and we don’t know what concentrations in fish are a cause for concern. This project highlights that, in addition to focusing on relevant microplastic concentrations, further studies need to consider environmentally exposed microplastics.”

Safer sanitation in food and beverage manufacturing and processing

With funding from U.S. EPA, ISTC’s Technical Assistance Program (TAP) is working with the food and beverage manufacturing and processing sector to help them reduce their energy consumption, water use, hazardous materials use, and operating costs. Cleaning and sanitation is a critical process throughout the industry and is one that is ripe for improvement.

By law, all food and beverage manufacturers and processors must have reliable processes in place to keep their products safe for human consumption. They are usually outlined in Good Manufacturing Practices (GMPs) and Sanitation Standard Operating Procedures (SSOPs). Cleaning and sanitation is critical in food safety to protect the processing environment from being inhabited by harmful microorganisms.

Cleaning and sanitation removes the food that bacteria need to grow and destroys any bacteria that may be present. The right prescription depends on the composition of food soils and the surface characteristics. The typical order for cleaning/sanitizing activities is:

  1. Dry clean
  2. Rinse
  3. Clean
  4. Rinse
  5. Sanitize

Common cleaning and sanitizing compounds include acids, alkali, phosphates and chlorine. In-plant storage, handling, and application of cleaning and sanitation compounds can be hazardous to workers. These products can also generate large volumes of wastewater and treatment costs to ensure that all post-sanitizing chemical residues are washed away.

Ozone generator
Ozone generator

With these challenges in mind, ISTC is working with the food and beverage industry to help clients identify and adopt safer, more environmentally benign cleaning and sanitation solutions, including aqueous ozone and electrolyzed water (EW).

Ozone has been widely studied as an anti-microbial for food application in this sector. It is approved for use by the FDA, USDA, FSIS, EPA and OSHA.

Electrolyzed water generator
Electrolyzed water generator

EW exhibits strong bactericidal, fungicidal, and viricidal effects in specific food applications but has not been as widely tested as ozone. It is approved in organic production and handling by USDA and received a Food Contact Notice (No. 1811) by the FDA for application of supplier specific technology to meat, poultry, fish, seafood; fruits and vegetables.

ISTC has a mobile aqueous ozone generator available to demonstrate the effectiveness of this technology. If your company is interested in learning more or scheduling a demonstration, contact Troy Walker or Dan Marsch.

Registration is open for the 2020 Emerging Contaminants in the Environment Conference

The 2020 Emerging Contaminants in the Environment Conference (ECEC20) will be on April 21-22, 2020, at the I Hotel and Conference Center in Champaign, IL. Registration is open through April 2 and scholarships for undergraduate students are available.

The conference will feature presentations and posters on the latest in emerging contaminant research, policies, and outreach in the soil, water, and air. There will also be plenty of opportunities for discussion and networking with those interested in all aspects of emerging contaminants in the environment.

Researchers, educators, businesses, government officials, regulatory agencies, policy makers, outreach and extension professionals, environmental groups, members of the general public, and medical, veterinary, and public health professionals are encouraged to submit abstracts and attend the conference.