In early 2018, residents of Boise, Idaho, were told by city officials that a breakthrough technology could transform their hard-to-recycle plastic waste into low-polluting fuel. The program, backed by Dow, one of the world’s biggest plastics producers, was hailed locally as a greener alternative to burying it in the county landfill.
A few months later, residents of Boise and its suburbs began stuffing their yogurt containers, cereal-box liners and other plastic waste into special orange garbage bags, which were then trucked more than 480km away, across the state line to Salt Lake City, Utah.
The destination was a start-up called Renewlogy. It marketed itself as an “advanced recycling” company capable of handling hard-to-recycle plastics, such as plastic bags or takeout containers — stuff most traditional recyclers would not touch.
Illustration: Constance Chou
Company founder Priyanka Bakaya told local media at the time that it would heat plastic in a special oxygen-starved chamber, transforming the trash into diesel fuel.
Within a year, that effort ground to a halt. The project’s failure shows the enormous obstacles confronting advanced recycling, a set of reprocessing technologies that the plastics industry is touting as an environmental savior.
Renewlogy’s equipment could not process plastic “films” such as cling wrap, as promised, Boise’s Materials Management Program Manager Peter McCullough said.
The city remains in the recycling program, he added, but its plastic meets a low-tech end: It is being trucked to a cement plant northeast of Salt Lake City that burns it for fuel.
Renewlogy said in an e-mailed response to questions that it could recycle plastic films, but the trouble was that Boise’s waste was contaminated with other garbage at 10 times the level it was told to expect.
Boise spokesperson Colin Hickman said the city was not aware of any statements or assurances made to Renewlogy about specific levels of contamination.
Hefty EnergyBag, as the recycling program in Boise is known, is a collaboration between Dow and US packaging firm Reynolds Consumer Products, maker of the program’s orange garbage sacks and popular household goods, such as Hefty trash bags, plastic food wrap and aluminum foil.
Hefty EnergyBag said in an e-mailed response to questions that it “continues to work with companies to help advance technologies that enable other end uses for the collected plastics.”
It declined to answer questions about Renewlogy’s operations, as did Dow spokesperson Kyle Bandlow. Reynolds did not respond to requests for comment.
The collapse of Boise’s advanced recycling plan is not an isolated case. In the past two years, three separate advanced recycling projects backed by other major companies — in Indonesia, the Netherlands and the US — have been dropped or indefinitely delayed because they were not commercially viable.
Many such endeavors are agreements between small advanced recycling firms and big oil and chemical companies or consumer brands, including ExxonMobil, Royal Dutch Shell and Procter & Gamble. All are operating on a modest scale or have closed down, and more than half are years behind schedule on previously announced commercial plans.
Many advanced recycling projects have emerged in the past few years in response to a global explosion of plastic waste. More than 90 percent is dumped or incinerated because there is no cheap way to repurpose it, according to a 2017 study published in the journal Science Advances.
At a time when demand for transport fuel is under pressure from government vehicle-efficiency mandates and the rise of electric vehicles, the oil industry is doubling down on plastics.
Plastic production — which industry analysts forecast to double by 2040 — is expected to be the biggest growth market for oil demand over the next decade, according to the Paris-based International Energy Agency.
A number of US and European cities have already levied bans or consumer fees on single-use plastic bags. Pressure is also building for “polluter-pays” laws that would shift the cost of waste collection from taxpayers to the companies that make and use plastic. Earlier this month, Maine became the first US state to pass such legislation.
Enter advanced recycling. Also known as “chemical recycling,” advanced recycling is an umbrella term for processes that use heat or chemicals to turn plastic waste into fuel or reclaimed resin to make new plastic.
American Chemistry Council (ACC), an industry group whose membership is dominated by plastics makers, says that polluter-pays measures would hurt the economy. It is urging US lawmakers to ease regulations on and provide incentives to recycling companies.
As of last month, 14 US states had passed these kinds of laws. At least US$500 million in public funds has been spent since 2017 on 51 US advanced recycling projects, the environmental group Greenpeace said in a report last year.
Boise’s government, for example, has spent at least US$736,000 on garbage bags for its program, according to purchase orders and invoices from May 2018 to April last year.
ACC says these technologies are game changers because they could potentially process all types of plastic, eliminating expensive sorting and cleaning.
“The potential is enormous,” said Joshua Baca, vice president of ACC’s plastics division.
The council this month called on the US Congress to develop a national strategy to reduce plastic waste, including “rapid scaling” of advanced recycling.
However, some advanced recycling companies are struggling with the same obstacles that have bedeviled traditional recyclers for decades: the expense of collecting, sorting and cleaning plastic trash, and creating end products that can compete on price and quality with fossil fuels or virgin plastic.
Transitioning from the lab to the real-world chaos of dirty and improperly sorted household plastic waste has proven too much for some of these newcomers, said Helen McGeough, a London-based senior plastic recycling analyst at Independent Commodity Intelligence Services, a data and analytics firm.
“People have entered into this, perhaps not understanding the processes properly, the waste that they are handling, and so that’s why some things have failed,” McGeough said.
Advanced recycling is in its infancy, and as with any emerging technology, setbacks are to be expected, a dozen industry players said.
So far, some of their own research shows it is no panacea.
An assessment of the Hefty EnergyBag program was commissioned by Reynolds. It compared the environmental impact of recycling plastic waste through a heating process known as pyrolysis — the approach Renewlogy used — to two traditional ways of handling it: burning it in cement kilns or putting it in a landfill.
The study, published on the Hefty EnergyBag program’s Web site last year, found that in Boise’s case, pyrolysis fared worst among the three in terms of its overall global warming potential. That measure estimated the greenhouse gas emissions of the whole process, from manufacturing the garbage bags and transporting the waste to the energy used in the recycling process.
A narrower analysis, looking just at the final recycling process and its contribution to global warming, found that pyrolysis scored better than landfilling, but was worse than burning plastic in a cement kiln.
“These types of studies will really push the chemical recyclers to think about their operations,” said Tad Radzinski, president of Sustainable Solutions Corporation, the consultancy which conducted the study.
The study said that its calculations came from various sources, including a US-based pyrolysis plant that has experience processing the Hefty EnergyBag materials.
Asked whether Renewlogy’s plant was the one it examined, Sustainable Solutions said it could not name the plant because of a nondisclosure agreement with that facility.
Reynolds and Dow had no comment about the study.
Renewlogy said it supplied no data to Sustainable Solutions.
“Our numbers are vastly different from those used in the report,” Renewlogy said.
CASHING IN ON TRASH
Advanced recycling projects have mushroomed, especially since 2018, when China, once the top buyer of the world’s used plastic, banned these imports because its recyclers were overwhelmed. Other countries are also shutting their doors to foreign waste, putting pressure on the developed world to deal with its own garbage.
The boom is also being fueled by investors looking for the next hot green-tech industry.
Most of the advanced recycling firms involved in such projects use a form of pyrolysis, the process of breaking down matter using high temperatures in an environment with little or no oxygen.
Pyrolysis has been tried before on plastic. British oil giant BP, German chemical maker BASF and US oil company Texaco — now owned by Chevron — all separately dropped plans to scale up waste-to-fuel pyrolysis technologies more than 20 years ago due to technical and commercial problems.
BASF said it believes such an endeavor is viable. It said in October 2019 it invested 20 million euros (US$23.73 million) in Quantafuel, a Norway-based plastic-to-fuel company listed on the Oslo Stock Exchange.
Some scientists challenge the assertion that melting unsorted plastic made from a variety of chemicals is good for the environment.
In addition to consuming large amounts of energy, “pyrolysis can generate toxic waste, such as dioxins,” said Hideshige Takada, a geochemist and professor at the Tokyo University of Agriculture and Technology who has studied pollutants in waste for decades.
Nor has pyrolysis proven capable of transforming unsorted garbage into high-quality fuel and clean plastic resin, said Susannah Scott, a chemistry professor at the University of California, Santa Barbara, who receives funding from the plastics industry to perform recycling research.
Plastics have long been stamped with the numbers 1 to 7 inside the familiar “chasing arrows” logo to help traditional recyclers separate the waste before processing it.
Scott said melting different numbered plastics together through pyrolysis produces a complex blend of hydrocarbons that must then be separated and purified for reuse.
That process requires a lot of energy, she said, and typically yields products that don’t measure up to the quality of the original material.
With pyrolysis, “the value of what you’re making is so low,” Scott said.
Advanced recyclers say they are overcoming these problems with innovations in energy efficiency and purification.
Of two-dozen companies whose projects were reviewed, three have gone public in the last year: PureCycle Technologies, Agilyx and Pryme. The market value of all has declined since their debuts.
One of the hardest hit has been PureCycle, a Florida-headquartered advanced recycling start-up that went public this year through a special purchase acquisition company. It ended its first day of trading on March 18 with shares up 13 percent to US$33, giving it a market capitalization of about US$3.8 billion.
Its shares tumbled 40 percent on May 6, the day short-seller Hindenburg Research published a report calling the recycler’s technology “unproven” and its financial projections “ridiculous.” PureCycle shares have since regained some ground.
PureCycle said the same day that Hindenburg’s report was “designed to drive down the stock price in order to serve the short-seller’s economic interests.”
It declined further comment about the report. Hindenburg also declined to comment.
According to its Web site, PureCycle uses a “groundbreaking” recycling process developed by P&G, maker of Gillette razors and Head & Shoulders shampoo, to turn a particular type of waste plastic, polypropylene, back into resin. PureCycle is about two years behind schedule on its first commercial plant, which its CEO Mike Otworth said on March 6 was due to slower-than-expected debt financing and the COVID-19 pandemic.
P&G declined to comment.
ACC continues to promote the potential of advanced recycling. Last year, it spent US$14 million lobbying members of the US Congress on various issues, the most the organization has ever spent, according to OpenSecrets.org, a nonprofit initiative that tracks money in US politics.
Until her two-year term ended in December last year, Renewlogy’s Bakaya was the chair of ACC’s advanced recycling unit.
ONE TO WATCH
Bakaya grew up in Australia after her father emigrated there from India, she told business podcast Upside last year. She attended Stanford University and the Massachusetts Institute of Technology (MIT), graduating from the latter in 2011. She became a prominent figure in advanced recycling, promoting her technology on media forums such as National Geographic and the BBC.
Bakaya garnered a string of accolades, including making Fortune’s “40 under 40: Ones to Watch” list in 2013.
She declined to be interviewed for this story.
Bakaya said in a TEDx talk in 2015 that she initially set up a company called PK Clean to recover oil from “mixed, dirty landfill-bound plastic.” PK Clean later changed its name to Renewlogy, Bakaya said in an interview with MIT in 2017.
Steve Case, cofounder and former chief executive of AOL, invested US$100,000 in PK Clean in 2016, according to a blog he authored on the Web site of his venture capital firm Revolution.
The governor’s office in Utah said it gave US$200,000 in grants in 2016 and 2017, while the Salt Lake City Department of Economic Development provided US$350,000 in loans in 2015 to PK Clean, according to Peter Makowski, acting director of business development for the department.
Revolution did not respond to requests for comment. The Utah governor’s office said the program under which PK Clean received the grants had ended and it was no longer funding the company. Salt Lake City said its loans to PK Clean have been repaid.
Boise first sent plastic waste to Renewlogy in June 2018, followed by at least five more truckloads in the following months, minutes of meetings of the Boise Public Works Commission show.
In June 2019, Boise said in a statement it had temporarily stopped sending its waste to Renewlogy while the Utah plant upgraded its equipment. Hefty EnergyBag said Renewlogy left the program for good in December last year. Renewlogy did not respond to questions about how much of Boise’s plastic waste it had recycled.
Reuters visited Renewlogy’s Salt Lake City operation unannounced in mid-May. On a Monday afternoon, there was little visible activity outside the facility; the front parking lot contained five passenger cars, two of which had flat tires. The back lot contained dozens of bales of plastic waste dotted with faded orange recycling bags stacked next to rusty oil drums and a wheelbarrow full of glass jars containing a murky liquid.
Renewlogy cofounder Benjamin Coates emerged from the building to speak to a reporter. Asked about the status of the company, Coates said opponents of chemical recycling were trying to damage the industry by pushing “conspiracy theories” about the technology. He directed further questions to Bakaya before asking reporters to leave the premises.
Jeremiah Bates, owner of a tire shop next door to Renewlogy, said the recycling plant did not appear to have been active for at least six months and that he had complained to Coates and the local fire marshal about the debris piling up out back.
Renewlogy did not respond to questions about Bates’ assertions.
Salt Lake City Fire Prevention Bureau inspector Jose Vila Trejo visited the recycling facility on Feb. 12, according to his inspection report. Vila Trejo said that his tour of the plant turned up no fire hazard because there were no machines present that could generate heat, flames or sparks.
“They were basically shut down,” Vila Trejo said. “There was no equipment in there.”
Renewlogy confirmed that Vila Trejo inspected the building in February. It said the facility had not shut down and that there was equipment at the site.
Renewlogy said it shares the Salt Lake City premises with other companies that work on pyrolysis of wood and other waste, and that much of the junk reporters saw on the back lot belonged to other firms that it declined to name. Renewlogy added that it continues to operate its plant as a testing facility to develop new plastic recycling technologies.
An advanced plastic recycling project in India, which was a collaboration between Renewlogy and a charity funded by plastic makers, collapsed last year.
Renewlogy later this year plans to launch another plastics recycling facility, this one in Phoenix, Arizona, according to its Web site. Joe Giudice, assistant public works director at the City of Phoenix, confirmed that the facility was due to start being set up this month. More taxpayer money is due to flow to the company.
The Arizona Innovation Challenge, a state-funded program, in 2017 awarded Renewlogy a US$250,000 grant, funds that would be dispersed when Renewlogy sets up in Phoenix, the Arizona Commerce Authority, which runs the program, said.
Giudice said Phoenix would not be sending Renewlogy any film plastics due to uncertainty over whether they could be easily recycled.
Renewlogy said it would be “starting very small” and would be “validating each step before scaling up.”
THE DEVIL’S SLIDE
Back in Boise, the Hefty EnergyBag program continues, but Renewlogy is no longer involved. Waste in those orange Hefty bags now helps fuel the Devil’s Slide, a cement plant in Morgan, Utah, part of the US unit of Holcim, a European multinational firm. The company said it has been burning Boise’s plastic since March last year as a replacement for coal.
Hefty EnergyBag has forged similar arrangements with cement makers in Nebraska and Georgia, according to the environmental study of the program commissioned by Reynolds.
Environmental groups tracking chemical pollutants say incinerating plastic this way produces significant carbon emissions and releases dioxins associated with the chemicals in the plastic.
This is in no way “recycling,” said Lee Bell, adviser to the International Pollutants Elimination Network, a global network of public interest groups working to eliminate toxic pollutants.
Back in Idaho, Anne Baxter Terribilini, a resident of Meridian, a Boise suburb, said she initially was eager to participate in the Hefty EnergyBag program, but was disillusioned to learn that her plastic waste ends up in a cement kiln.
“I hate to feel like we are being lulled into complacency, believing that we are having a positive impact on the environment, when really we aren’t,” she said.
Haley Falconer, Boise’s sustainability officer, said the city has learned from the setbacks, adding that in hindsight, it would have been better to build a customized recycling program with a local partner so that Boise could control where its waste was going.
The city has no place else to put its plastic garbage, so it is sticking with the Hefty EnergyBag program, McCullough said.
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