Imagine bananas that never go bad. To Aidan Mouat, CEO of Chicago-based Hazel Technologies, it’s not so far-fetched.
His company makes a product that extends the shelf life of all sorts of produce — avocados, cherries, pears, broccoli — by slowing the chemical process that causes decay. Some of the world’s largest growers are using it to send their produce longer distances or reduce how much retailers throw away, and Mouat says a consumer version could be next.
“I envision, in the next 18 months or so, literally selling a banana box to consumers,” Mouat said from Hazel’s growing office space at University Technology Park, a startup innovation hub on the Illinois Institute of Technology campus. “You keep it on your counter, put a (Hazel) sachet in there once a month, and you have bananas that last forever.”
Hazel Technologies is part of a new wave of innovation seeking to slow spoilage of produce and other perishables, which experts say is a key weapon in the battle against massive food waste.
Uneaten food is the No. 1 occupant in landfills and squanders the water and energy used to grow and transport it.
Routing unused food to charities or upcycling can help keep it out of the garbage, but solutions to prevent waste at the source, such as through shelf life extension, "have some of the greatest economic value per ton and net environmental benefit,” said Alexandra Coari, director of capital and innovation at ReFED.
Spoilage prevention packaging has the potential to divert 72,000 tons of waste and 330,000 tons of greenhouse gas emissions, plus save 44 billion gallons of water a year, she said.
Technology that extends shelf life has been around for a long time, but there has recently been a “huge uptick” in innovations that expand the options, helping to drive the $185 million in venture capital invested in combating food waste last year, Coari said.
“It’s the early days,” Coari said. “We are excited to see where they can go.”
Hazel Technologies, founded in 2015 by a group of Northwestern University graduate students, has raised $18 million so far, including nearly $1 million in grants from the USDA. It has 100 clients in 12 countries in North and South America.
The company makes small sachets, the size of a salt or pepper packet included with takeout, that can be thrown into a box of produce to shut down the food’s response to ethylene, a chemical naturally emitted by many fruits and vegetables that triggers the loss of firmness, texture and colour. The sachets continuously emit a small amount of an ethylene inhibitor, changing the atmosphere in the storage box but not the food itself.
While ethylene management technology isn’t new, Hazel’s sachets are gaining fans because they are easy to use, whether in okra fields in Honduras or avocado packing houses in the U.S., Mouat said. In addition to ethylene inhibitors, the company is working on anti-microbial reactions and will soon bring to market antimicrobial liners for packages of berries, to ward off the white fuzz.
Hazel’s goal is to improve the delivery of decay-stopping technologies by incorporating them into packaging, not only for produce but also for cut meats.
“We can extend the shelf life of practically any perishable by targeting the specific mechanism that causes it to go bad and integrating it with the packaging that already exists today,” said Mouat, who graduated from Northwestern with his PhD in chemistry in 2016.
How much Hazel can extend the shelf life depends on the type of food. For example, tests show an unripened pear gets an extra seven to 10 days after being treated with a Hazel sachet, plus an extra three to four days once ripe, Mouat said. Pilot testing being done on packaged chicken, beef, fish and pork suggests the sell-by date could be pushed back by four to six days, he said.
Mission Produce, the largest grower, packer and shipper of Hass avocados in the world, found that ripe avocados that normally would have to be sold in two to five days once hitting retail stores lasted seven to 10 days if they were treated with Hazel’s product, said Patrick Cortes, senior director of business development at California-based Mission. Once they’d achieved maximum ripeness, which normally means they’d turn black inside within a couple of days, some treated avocados kept at room temperature were still good when they were sliced two weeks later, he said.
Mission, which has developed a branded product with Hazel called AvoLast, has completed one retail trial with the product and is about to launch two more, as well as a food service trial, Cortes said. So far he prefers it to other shelf life extension treatments the company has tested because it is easy to use.
“You just throw it in the box,” Cortes said. “It gives us the flexibility to treat the fruit at various parts of the supply chain, whether at packing or at ripening.”
Mission is investing in the technology to help retain the freshness of avocados that travel long cross-ocean journeys and help U.S. retailers save money by throwing fewer avocados away, Cortes said. On average U.S. retailers waste 5% of avocados, which also has an environmental impact, he said.
“We took a retailer we sell to and said, if we can reduce their (wasted produce) by 2% it would be the equivalent of powering 26 homes for a year,” Cortes said. “It just makes perfect sense to do the right thing.”
It also makes business sense, and investors are starting to take notice, said Coari at ReFED. California-based Apeel Sciences, which has created an all-natural coating that gives produce a spoilage-resistant skin, last year landed a $70 million funding round that included Andreessen Horowitz, a prominent venture capital firm that has backed some of the biggest tech companies.
Apeel installed its coating equipment along Kroger’s avocado supply chain and this year rolled out longer-lasting avocados at hundreds of Kroger stores. It is also starting retail tests on asparagus, which are the produce industry’s biggest carbon emitters because their shelf life is so short they have to travel by air.
Other movers in the industry include Massachusetts-based Cambridge Crops, which makes an edible protective coating from natural silk proteins and recently got $4 million in seed funding from MIT’s venture fund; and UK-based It’s Fresh, a maker of ethylene filters that last year got a $10 million infusion from AgroFresh, a longtime maker of freshness products, which bought a 15% stake in the company.
Yet adoption by the industry has a long way to go. Suppliers pay for the technology but the benefit is felt downstream at retail, complicating the business model, Coari said.
It is unclear if shoppers will be willing to pay more for longer-lasting produce or will respond to branding of products long considered commodities, she said. It’s also unclear how much more it might cost them. Prices vary so much because of weather or other production issues that consumers may barely notice, Hazel’s Mouat said. Apeel, in its pilot with Kroger, found no price increase was necessary because sales increased and waste declined.
In addition, it can be complicated and expensive to introduce shelf life extension technologies into the supply chain if it involves installing equipment or training seasonal workers.
That’s where Hazel has a leg up. Growers and suppliers that have tried numerous alternatives say they have been attracted to the flexibility and user friendliness of Hazel’s technology.
“It has to be simple to use or may not be worth doing,” said Davis Ortega, director of packing operations at Orchard View Cherries in Oregon.
Orchard View conducted a small trial with Hazel two years ago and this year has more than doubled its use, primarily for cherries embarking on ocean trips to Asia that can take up to 23 days.
It found cherries treated at the end of the packaging process were firmer than untreated cherries after 20 days, and had fewer indentations and greener stems. Consumers often reject produce that doesn’t look perfect, even if it is still perfectly good, so aesthetics matter.
“It was definitely noticeable. The fruit looked fresher, more appetising,” Ortega said. “It allows us to feel more confident in where we can ship our product.”