UH grad students find way to make salads healthier - Houston weather, traffic, news | FOX 26 | MyFoxHouston

UH grad students find way to make salads healthier

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HOUSTON (FOX 26) -

University of Houston graduate students have found a way to make to make your salad safer.

Small farmers often rinse but don't actually wash their produce.  Larger producers can afford elaborate and effective lettuce-washing machines.

Lettuce is a major source of food borne illnesses, like ecoli.

The students have invented a device that washes lettuce in a vinegar solution that kills many of the pathogens on lettuce.  

Coming up with something so simple was not so simple, Cecelia Zerio Egli said.  In the beginning, they over-engineered everything.

"We made a lot of tiny prototypes that we realized didn't work," Egil said.  "We changed over time and we ended up with this right here."  

A five-gallon bucket, full of holes, acts as the tumbler.  A hand crank of PVC pipe allows it to rotate on an axle.  

It has a PVC pipe arm that allows the operator to put the tumbler into a vinegar solution and swish the lettuce around.  You lift up the arm and spin it like a salad spinner to dry off the produce and recapture the solution.

It cost about $50 to make.

"Ideally, we'd like to prevent the pathogens from getting on the produce," assistant professor Jay Neal said.  "But what we're seeing with the vinegar is a 3-4 log reduction which is a really significant improvement."

Some farmers have heard about this program and are asking to help test and refine the device.  The team plans on giving the plans for the device to small farmers for free come fall.

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