The Hazelnut Growers of Oregon cooperative is hoping to provide its farmers with a new benefit: peace of mind.
Pasteurization equipment recently installed at its processing facility in Cornelius, Ore., will provide a “kill step” for diseases like salmonella and E. coli, which have prompted hazelnut recalls and attracted scrutiny from the U.S. Food and Drug Administration.
“It’s somewhat of a firewall between them and the FDA,” said Jeff Fox, CEO of the cooperative.
By heating nuts to nearly 200 degrees Fahrenheit and treating them with pressurized steam, the pasteurization equipment results in a 100,000-fold reduction in pathogenic microbes.
The process is expected to shield hazelnut farmers from the FDA’s regulatory muscle, thereby growing the cooperative’s community of suppliers.
The FDA will require processors to identify disease risks and tailor specific remedies under proposed food safety rules that will be finalized this year, said Charles Breen, a food industry consultant and former agency official.
Growers who produce crops meant for raw consumption will also be subject to a “produce safety” rule that governs on-farm practices.
It’s likely that hazelnut growers who document their crops are treated with this “kill step” will not fall under the FDA’s on-farm purview, Breen said.
“The agency will probably accept it as an appropriate measure to control a hazard,” he said. “I think this approach is one that will reduce FDA’s interest in farms that are growing nuts subject to this process.”
On-farm measures to prevent microbes are difficult for hazelnuts, which are harvested from the ground in orchards that are tough to protect from animal incursions.
Some bacteria can persist in the soil for years and live independently from animal digestive tracts, said Philippe Cornet, food safety and quality supervisor for HGO.
Even expensive fencing would not ensure the exclusion of pathogens, since birds fly over orchards, he said. “You would have to put it in a bubble and sterilize the soil.”
The cooperative expects to reap other rewards from the new pasteurization line — improved food safety is expected to win new customers and reduce costs over time, said Fox.
The cooperative has spent approximately $3 million on the pasteurization project and expects a payback time of about five years on the investment, he said.
Reduced transportation will provide measurable savings, as HGO will no longer have to ship hazelnuts to California for treatment with propylene oxide, a chemical used for sterilization.
“Freight costs are rather expensive and the treatment itself was rather expensive,” Fox said.
Apart from direct costs, the propylene oxide treatment slowed hazelnut deliveries to HGO’s customers. With on-site pasteurization, the turnaround for clients will be much faster, he said.
The cooperative’s insurance premiums are expected to fall due to the pasteurization line and it will be able to reduce sampling and testing costs.
Avoiding a potential disease outbreak offers another major advantage, Fox said. “Recalls are very expensive.”
Before installing the pasteurization machinery, HGO had to resolve some serious questions about the technology.
The main concern was the potential impact to sensory qualities, Fox said. “That was probably one of the biggest things.”
If pasteurization dried the crop excessively, the nuts would taste different and their weight would be reduced, denting revenues for the cooperative. Altered color was another worry.
After treating hazelnuts at a pilot plant of the equipment’s manufacturer, Napasol, HGO found that any changes were negligible and decided to move forward with the project, Fox said.
While pasteurization is new to the hazelnut industry — which is centered in the Northwest — other tree nut growers in California have successfully adopted the technology, said Cameon Ivarsson, scientific director for Napasol.
“Everybody is going in that direction in the U.S.,” she said.
The move to pasteurization was initiated by the almond industry, which mandated the process under a federal marketing board order in 2007, Ivarsson said.
Since then, walnut, macadamia and pistachio processors in the state have begun treating their crops voluntarily, she said.
Pasteurization with heat and pressurized steam is growing in popularity because the European Union prohibits propylene oxide treatments due to fears of carcinogenic byproducts, Ivarsson said.
Processors who sell in the U.S. market are taking notice, since some domestic consumers have also raised concerns about the chemical, she said. “There’s a potential for backlash.”