The Danish city of Aarhus launched a three-year trial program to curve down the number of disposable coffee cups where locals can use a deposit system for reusable takeaway packages.
Like in other Nordic and Central European countries, in Denmark deposit system where one receives back money one pays when purchasing a plastic bottles or cans is already in place
The project that focused on eliminating disposable cups trash is the result of a collaboration between the Municipality of Aarhus and the recycling company TOMRA which already provides other waste collection services to the city.
For a year and a half in 2022, the company All In On Green’s robotic arm SeaProtectorOne deployed in the water, collected over 100,000 disposable glasses from the city’s river Å – from which the city derived its name – demonstrating a huge level of plastic pollution in the city.
”Aarhus must be greener and more sustainable, and Aarhus must be a city where we have the courage to test new solutions.” said Nicolaj Bang, Aarhus’ councillor for technology and environment in a press release. “We use enormous amounts of takeaway packaging in Denmark, and consumption is increasing. Therefore, it really matters if we can make it easier for both consumers and businesses to choose a more sustainable alternative to disposable packaging,” he stated.
Aarhus is the second biggest city in Denmark, counting around 336,000 inhabitants – and potential disposable cup users. The trial has been set as voluntary, but so far already 44 cafés and bars in the center of the city got interested in the project – perhaps even some frequented by King Frederik X, when he used to study at the city’s university.
Initially, 40,000 cups in two designs will be produced and around 25 deposit machines will be established in the city so that citizens can return their cups, and cash back some Danish kroner. Geir Sæther, senior vice president for circular economy at TOMRA said the company expects ‘to be able to expand the system to other types of packaging in the near future’, so to facilitate the transition from single-use to reusable packaging.
The return fee for a reused cup is just over 70 dollar cents (DKK 5) , but it is not for the money that citizens should start returning their cups: ”Recycling saves the earth’s resources and our emission of CO2. More recycling means that there is less waste that ends up as rubbish in our city and our nature,” said Bang.
This is the first city in Denmark, and the world, to carry out such city experiments, although Copenhagen had previously trialed an experimental system where pizza containers, sushi trays and coffee cups should be able to be returned in the hip area of Kødbyen, situated in a central neighborhood. Currently, Danish startup Kleen hub is experimenting in the capital with its third-generation return system based on a single bank card tap.
TOMRA’s ceo Tove Andersen said in a press release that “Aarhus shows the way to one more sustainable future, and we hope that many more cities will be inspired to do the same,”.
Cities and regional authorities have so far acted upon consumer behaviors to decrease different kinds of pollution in their cities: “These policies are quietly working because local governments are addressing climate change with communities long-term together with other challenges that people care about, like healthy diets and supporting local businesses,” said Olivier de Schutter, co-chair of the sustainable food system expert team IPES-Food.
In 2022, Starbucks announced a company goal to reduce waste sent to landfills from stores and direct operations. The goal was to reduce waste by 50% by 2030. Part of Starbucks plan to minimize waste is to move away from single-use plastics and promote reusability to shift towards a circular economy. It is said that 40 percent of Starbucks’ annual packaging is attributed to disposable cups. Moreover, these cups account for 20 percent of its waste footprint.
The Starbucks plan to minimize waste focusses on reducing its environmental impact; the coffee company hopes to create a cultural movement towards reusables by giving customers easy access to personal or Starbucks-provided reusable to-go cups that can be used in their cafes, drive-thrus, and mobile order and pay.
The Starbucks plan to minimize waste includes several reusable programs to help achieve its goals. They have been testing these programs in phases since 2022. Their Borrow a Cup program allows customers to order their drink in a designated Starbucks reusable cup. The cups are designed to be returned to the stores after use, professionally cleaned, and then reused by other customers. This project is being tested in Seattle, Japan, Singapore, and London.
In 2022, Starbucks implemented 100% reusable operating models, eliminating single-use cups completely. They tested this in 12 stores in Seoul, which helped to divert more than 200,000 disposable cups from the landfill. In early 2023, Starbucks tested their 100% reusables operating models at stores at Arizona State University. They also implemented return bins across the campus near garbage and recycling bins to collect the borrowed cups.
The Personal Cups & For-Here-Ware initiative encourages customers to bring their own cups. Starbucks began testing this initiative at their experiential Greener Store in Shanghai. Furthermore, Starbucks has been developing ways to incentivize customers to bring their own cups. This includes offering free coffee or discounts to customers who bring their own cups. They’ve also partnered with the Ocean Conservancy to donate 1$ to the organization if customers bring in their clean, reusable cups. At their Arizona State University campus stores and cafes in O’ahu, Hawaii, they have started implementing washing stations so customers can have their cups cleaned before ordering their beverage.
Because disposable cups are still in circulation, Starbucks is looking at ways to make the cups more sustainable and out of better materials. They are working on doubling the hot cup recycled content and reducing the materials required to make the cup and liner. The paper used for their hot cups will be sustainably sourced and certified by the Forest Stewardship Council. Over $5 million has been invested to develop a more sustainable hot cup. By the end of 2023, Starbucks will have eliminated PFAS from all of their packaging. Starbucks has already switched from plastic straws to compostable ones in stores across the globe.
The Starbucks plan to minimize waste is still in the trial phases of its programs. It needs to address a few concerns, including the best ways to collect and wash the cups and especially to figure out the best ways to encourage bringing the reusable cups back and not simply throwing them away. Moreover, they need to figure out how to make the lids of their hot cups recyclable and compostable and to encourage people to throw the contents in the right places.
It is encouraging to see a big company like Starbucks working to reduce waste and be more environmentally friendly in the ways they do business. Hopefully, Starbucks’ plans to minimize waste will influence more coffee shops around the world tol follow suit and help us reduce plastic and disposable cups and promote reusable alternatives.
Coffee is one of the most popular drinks worldwide; on average, 400 billion cups of coffee are consumed each year. As a result, approximately 18 million tonnes of coffee grounds are produced annually. Coffee grounds can be used for a variety of purposes. It can be used to fertilize your garden or added to compost. Coffee grounds can neutralize odors, can be used to exfoliate your skin, tenderize meats, and many other uses.
Despite all of these amazing uses for coffee grounds, the reality is that most of the coffee grounds produced actually end up in landfills; about 75% in fact. Rotting coffee grounds generate methane, a powerful greenhouse gas contributing to warming. Rotting coffee grounds also emit carbon dioxide, nitrous oxide, and ammonia. While there have been programs from coffee shops that will donate their coffee grounds to customers to use in their gardens (Starbucks has been part of the Grounds for Your Garden program since 1995), but most coffee shops are not implementing these initiatives.
Researchers from the Royal Melbourne Institute of Technology University in Australia have found a way to use coffee grounds on a larger scale and to eliminate the risk of them ending up in landfills. And that is to use coffee biochar concrete in the construction industry.
The researchers have developed concrete that is almost 30 percent stronger than traditional concrete by mixing in coffee-derived biochar. The coffee biochar was created using a low-energy process called pyrolysis. The organic waste is heated to 350 degrees Celsius without oxygen to avoid the risk of generating carbon dioxide. Under pyrolysis, organic molecules vibrate and break down into smaller components, creating biochar. This is a similar process that is used to roast unused beans to enhance their taste, except without the use of oxygen.
In coffee biochar concrete, about 15 percent of the sand they would use to make concrete is replaced with the coffee biochar, thus creating new concrete. The coffee biochar is finer than sand, and its porous qualities help to bind to organic material. Reducing the total use of sand in concrete will minimize the construction industry’s environmental footprint. It is said that over 50 billion metric tons of natural sand are used annually in construction. Sand mining significantly stresses ecosystems, including riverbeds and riverbanks, coffee biochar concrete can relieve some of that pressure on the environment.
The cement industry is the third largest source of industrial air pollution, including sulfur dioxide, nitrogen oxides, and carbon monoxide. Moreover, cement currently accounts for around 8% of global carbon dioxide emissions. Turning coffee- biochar into concrete will reduce the construction industry’s reliance on continuous mining of natural resources, making the industry more sustainable.
When introduced into concrete mixtures, the coffee biochar concrete was found to act as a microscopic carbon repository within the concrete matrix. The alkaline conditions within hardened concrete enable biochar to mineralize and firmly bind carbon dioxide into its structure over time. Concrete containing even a small percentage of spent coffee biochar was shown to sequester meaningful quantities of CO2 from the curing process and surrounding environment.
Utilizing waste coffee grounds to synthesize biochar for carbon sequestration could offer a sustainable way to offset concrete’s sizable carbon footprint while giving new purpose to spent grounds. With further research, coffee biochar concrete could provide a feasible carbon capture pathway for the construction industry.
The researchers estimate that if all the waste grounds produced in Australia annually could be converted into coffee biochar, it would amount to roughly 22,500 tonnes. Compare that to the 28 million tonnes of sand that are required to produce over 72 million tonnes of cement concrete in Australia. Just think: Australia has over 13 thousand coffee shops, whereas the United States has over 38 thousand coffee shops. If this project expands outside of Australia, coffee biochar concrete could significantly impact the environment and waste.
The research on coffee biochar concrete is still in the early stages; there is still a lot of testing to be done, but it shows that there are innovative and unique ways to reduce and repurpose organic landfill waste. Once the researchers can account for things like durability, the researchers will collaborate with local councils on future infrastructure projects, including the construction of walkways and pavements. Just think, we are one step closer to adding sustainability into the construction industry and one step closer to walking on coffee biochar concrete!
In a secret location in an industrial area in western Sydney, a test strip of asphalt is being laid.
But this is no ordinary road.
The 50-metre strip stretching out into the hot afternoon sun is held together by an unusual material. The gooey cellulose that binds a road surface together is usually imported from overseas, but here it has been sourced locally: from the paper, plastic, lids and liners of coffee cups that were once destined for landfill.
A test strip of road which incorporates coffee cups from the Simply Cups program. Photograph: Carly Earl/The Guardian
For months now, heavily loaded trucks have rolled back and forth over this asphalt and the surface has held up without cracking. The product has been put through a machine test that flexes it until it fails. So far, it has done everything a road surface is expected to do, and then some, says John Kypreos, director of State Asphalt Services. “It’s a better performance product than what we were producing before.”
Exactly how much of the asphalt was once part of a takeaway coffee cup is top secret, according to Kypreos. Ask too many questions and you’re hit with the same answer: that’s the “secret herbs and spices”.
But the western Sydney asphalt manufacturer is on the cusp of rolling out the first roads in Australia surfaced with recycled waste from coffee cups, as part of a collaboration with recycling program Simply Cups. The unusual partnership was brokered by the organisation Closed Loop, which looks for opportunities to achieve what’s known as “net-positive waste”.
Kypreos met Closed Loop’s chief commercial officer, Chris Collimore, about a year ago, after a late-night conversation at a birthday party turned to how waste can be used to make roads. Soon after, he saw a Simply Cups collection stand in a 7-Eleven, and got on the phone to Collimore.
“It really did start with an idea that John had that he then matched up with our program,” Collimore says.
Chris Collimore, the chief commercial officer of Closed Loop. Photograph: Carly Earl/The Guardian
Net-positive waste
The idea is a simple one: instead of burying waste in landfill, the raw materials of that waste are “upcycled” into new products. It means not only keeping stuff out of landfill, but that fewer virgin resources are consumed in the manufacture of new products. It also means less energy and therefore less greenhouse gas emissions go into the sourcing of those new resources.
That’s what’s called closing the loop, or a circular economy.
But there’s a big but: someone has to buy these recycled products, or else the loop has not actually been closed. And that’s where Closed Loop comes in as matchmaker: pairing up waste streams with companies that can do something with them.
Coffee cups are collected by Simply Cups and then turned into asphalt. Photograph: Carly Earl/The Guardian
“It’s not until you’re actually buying back the products that are made out of that [reused] material that you’re … properly recycling,” says Rob Pascoe, the organisation’s founder and head. “It’s not just a matter of lifting the lid on your yellow bin at home and putting stuff in the bin and saying, ‘I’ve done my job’.”
There are three conditions that need to be met to close the loop on a waste stream. First, there has to be a need for the product made from that waste, whether that be fence posts or street furniture. Second, the product made from waste has to be fit for purpose – it has to meet the same standards as the existing version. And third, it must be commercially viable.
Commercial viability isn’t about being cheaper than the non-waste-based alternative, Pascoe says. A product made from recycled materials might be slightly more expensive, but consumers need to remember how much money they’re simultaneously saving on waste disposal.
While coffee cups are attractive because they are an everyday and relatively easily collectable waste stream, the real low-hanging fruit for waste reuse is food waste, says Pascoe. Australia spends more than a billion dollars on artificial fertilisers in an attempt to restore the nutrient capacity of the soil that our food crops are grown in. But at the same time, we’re sending huge amounts of food waste to landfill where it generates methane.
“It’s sheer stupidity,” he says.
State Asphalt Services in western Sydney. Photograph: Carly Earl/The Guardian
Soft plastics are another one, and here Pascoe disagrees with the move to ban single-use plastics.
“It’s not the plastics that are the problem, it’s what we do with the plastics,” he says. As soon as you put a value on waste, it stops being waste and starts being a resource. “If we do that, it is very, very easy to recycle plastics.”
Pascoe says Australia has failed to invest in the necessary infrastructure to recycle properly. When community enthusiasm for recycling was at its peak, few knew the reality: that the waste we so carefully sorted into recycling bins was being shipped off to China.
“That has become what recycling means, and it’s not what recycling means,” he says. “We should be putting the demand back on people who create the waste to buy back products.”
Waste recovery and reuse has the potential to boost the Australian manufacturing industry. Photograph: Carly Earl/The Guardian
That change needs to come from the top, Pascoe argues, with government procurement policies that mandate a minimum amount of post-consumer recycled materials in products.
“If we can get to that point with governments then we’ve basically won the issue.”
A major boost for industry
Closing the loop doesn’t just offer environmental benefits, there are huge economic benefits as well, according to Gayle Sloan, CEO of the Waste Management and Resource Recovery Association Australia. Every 10,000 tonnes of waste that is recovered, reused, repurposed or recycled creates 9.2 jobs, compared with just 2.4 jobs if that material is sent to landfill or exported.
“We’ve got the chance to create four times as many jobs if we actually think about the materials that we consume and purchase, the supply chains, the collection, the reprocessing and the remanufacturing on shore,” Sloan says. Waste recovery and reuse offers the potential to be a major boost for the Australian manufacturing industry coming out of the Covid-19 pandemic, if it’s done right.
Sloan says the right sort of conversations are beginning within government, with MPs starting to talk about resources instead of waste, and “recognising that it’s not just something we discard in a linear way”.
The joint federal, state and territory governments’ 2019 National Waste Policy Action Plan set a target of banning the export of waste plastic, paper, glass and tyres starting in late 2020, achieving an 80% average recovery rate from all waste streams by 2030, and increasing the use of recycled content by governments and industry. In July this year, the federal government also committed $190m to a new Recycling Modernisation Fund that is intended to generate investment in Australia’s waste and recycling capacity.
Sloan argues Australia also needs a paradigm shift in thinking about how products are manufactured and consumed.
“We need to choose the right materials when we extract resources, and design it in such a way that the value proposition is there and the worth of the material is recognised,” she says. She’d like to see the Australian government mandating the shift to a circular economy strategy, like the European Union has done with its circular economy package.
“It’s not anti-competitive because that is the expectation, that we engage in circular economy that is designing out waste, creating regenerated systems and creating jobs,” she says. “All we’re doing is coming into line with the rest of the world.”
Cradle to cradle
Back in western Sydney, the eventual goal for Collimore and Kypreos is a road that is made of 100% recycled material.
Apologising for the “messy” state of his plant, Kypreos points out piles of crushed rock, sand, bitumen and lime, as well as bits of old road surface, which are all set to be transformed into asphalt. He is already using recycled glass to substitute for some of the sand. A complex process of dehydrating and heating turns it all into road surface.
Chris Collimore’s goal is a road that is made of 100% recycled material. Photograph: Carly Earl/The Guardian
There are huge opportunities for industry to make use of waste streams in Australia, Kypreos says, but the infrastructure that’s needed to sort and store waste so it can be easily accessed just doesn’t exist yet. He argues that waste levies should be spent on building that infrastructure, and on encouraging innovative partnerships and projects.
“There’s product in there,” he argues. “It’s just a matter of sitting down and testing and building the science to see if these items that they can pull out of their waste streams are useable or reusable.” But he’s also wary of being seen as the only option. “We’ve got to be careful that we’re not looked at as the new landfill alternative.”
Turning coffee cups into roads is a step in the right direction, but truly closing the loop means ensuring no raw materials are lost at any point along their life cycle. It’s a cradle-to-cradle mentality.
The ultimate goal is to reproduce the same product with recycled material, says Sloan. Plastics – white plastics in particular – would be an easy place to start, she says, because “we can turn that back into a yoghurt container over and over and over – if we choose the right materials, if we have the right collection.”
The coronavirus pandemic has devastated the economy but also presented a unique opportunity: to invest in climate action that creates jobs and stimulates investment, before it’s too late. The Green Recovery features talk to people on the frontline of Australia’s potential green recovery.
