Fremont, CA-based Purfresh, a provider of technologies that purify, protect
and preserve food and water, announced May 10 results of recent third-party
research that demonstrate ozone's applicability and effectiveness as a tool to
improve the safety of fresh food.
The results, from research commissioned by Purfresh and conducted by The
National Food Lab, demonstrated that controlled supplementation of ozone,
an active form of oxygen, into transportation container conditions was able to
kill and control the spread of Salmonella by more than 99.997 percent,
Listeria monocytogenes by more than 99.999 percent and E. coli O157:H7 by
as much as 99.9 percent. The results were on both actual fruit and container
surface coupons and represent the efficacy of using ozone during transport,
which is often the longest segment of the supply chain, to actively reduce
"Countless studies have proven ozone controls bacteria, molds, yeast, viruses
and ethylene," Dee M. Graham, president of R&D Enterprises, said in a May 10
press release. "I believe this study was unique because it showed that ozone
is also highly effective at killing harmful bacteria in conditions similar to
those found in refrigerated shipping containers."
An estimated 70 million tons of perishables were transported in refrigerated
containers last year. During transport, with transit times ranging from seven
to 50 days, harmful micro-organisms can multiply rapidly, putting the food
at risk for contamination and spoilage. Purfresh addresses these risks with its
ozone-based "Purfresh Transport" solution, an active cargo protection system
that has been scientifically engineered to use ozone, a natural, residue-free
form of oxygen, to control ripening, reduce decay and enhance the safety of
fresh produce during transport.
"Given the continued expansion of the global food market and the ever-
increasing reports of food related illnesses, it is exciting and encouraging to
see innovative companies like Purfresh applying sound science and
commercially viable solutions to this important industry challenge," Paul A.
Hall, president of AIV Microbiology & Food Safety Consultants LLC, said in the
release. "And I believe they really hit a home run with their transport solution
by providing a way to enhance food safety as well as maintain the quality and
value of fresh produce being shipped around the world without the
dependency of many harsh, traditional chemicals that are rapidly falling out
of favor in the world's markets."
"At Purfresh, we are focused on meeting the needs of the global food industry
by providing innovative solutions that are science-based, easy to use and
integrate with existing processes and infrastructure," David Cope, president
and chief executive officer of Purfresh Inc., said in the release. "Unmatched by
any other cargo protection system in the industry, our 'Purfresh Transport'
solution uniquely takes advantage of the clean, powerful properties of active
forms of oxygen to help extend shelf life, minimize losses, maintain quality
and enhance the safety of fresh produce all the way to market."
Available for use on new and existing refrigerated shipping containers, the
patent-pending "Purfresh Transport" system simply "snaps" into a fan port to
integrate with a container's refrigeration system. Leveraging the existing
airflow system, the "Purfresh Transport" technology delivers precise, low-
dose levels of ozone throughout the container, treating the air and surfaces
to reduce harmful microorganisms that may lead to both disease and decay.
The system actively monitors and adjusts the required ozone levels
throughout the voyage based on changes in the condition of the cargo or the
Purfresh Transport is available through most major ocean carriers and is
offered as a per-trip service.