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Thu November 8, 2012
You Can Thank A Whey Refinery For That Protein Smoothie
Originally published on Fri November 9, 2012 7:52 am
If you've ever checked the ingredient list on a PowerBar or a high-protein smoothie, you probably have stumbled across these words: "Whey protein concentrate." You'll find it in a growing number of prepared foods.
This mysterious ingredient is derived from one of the oldest of human foods — milk. But capturing it requires huge factories that look more like oil refineries than farms.
In fact, the refinery comparison is apt. Increasingly, milk isn't something you just drink anymore — we're drinking less plain old milk these days. Instead, milk's become a raw material, sort of like crude oil, that's broken down into separate, more valuable products.
This factory swallows a river of milk every day — 1.6 million pounds of it. And in the first step of cheese-making, enzymes separate that milk into solid curds and liquid whey. For every pound of curds, there are 9 pounds of whey. The whey drains through a massive, slow-moving belt that works like a sieve, and it's pumped away.
Years ago, the whey would have been treated as waste and trucked away to farmers who spread it on their fields or fed it to their pigs.
Today, though, it's pumped to another side of this factory, which actually seems a lot bigger and more high-tech than the cheese-making side. This is the whey processing plant.
Tim Opper, Cabot's director of process technology, shows off rooms filled with shiny pipes that funnel the whey through a series of filters.
The pores in these filters are so tiny and precise that they can trap big molecules, like the long chains of amino acids that we call proteins, while allowing water and sugar molecules, which are smaller, to flow right through.
It's all dedicated to dividing this river of whey into increasingly narrow, purified streams of sugar or concentrated protein.
There are even ways to fish out one specific protein, if it's valuable enough. There's a room at this factory devoted to extracting a protein called lactoferrin, which is a protein that helps the body use iron and also fight infection.
Lactoferrin is common in human breast milk, but there's not much in cow's milk. From the 1.6 million pounds of milk that go through this factory every day, the equipment in this room captures just 120 pounds of lactoferrin. "We're just stripping out the single molecule, collecting it, processing it, and drying it into a powder," Opper says.
In bulk form, lactoferrin powder is worth about $225 a pound. When it's packaged as a nutritional supplement and sold in the form of pills, some consumers are paying $50 for just an ounce of it.
Opper says that these sugar and protein products are a nice boost to Cabot's bottom line, but traditional cheese remains the company's most profitable product.
The picture is different, though, at some of the country's very biggest cheese factories, which are five or six times bigger than Cabot's plant in Middlebury.
The bigger the cheese factory, the bigger the stream of whey, and the more cost-effective it is to run that whey through a refinery.
Eric Bastian has lived through this transformation. He grew up hauling 10-pound cans of milk to a little cheese factory in Aurora, Utah. He now works for Glanbia, which runs some of the biggest cheese factories in the country.
Glanbia's biggest plants, in the new megadairy states of New Mexico and Idaho, can each process 10 million pounds of milk a day. Bastian is director of research for the subsidiary Glanbia Nutritionals, which handles the whey processing.
"Depending on the markets, in any given year, the whey may be more valuable than the cheese," Bastian says.
The growing value of whey is due to improvements in filtering technology, developed at big companies like Glanbia as well as academic centers such as the Center for Dairy Research at the University of Wisconsin. As increasingly specialized whey products become available, demand for them has also expanded.
The sugar — the lactose — may end up in chocolate or baked goods. But most of it gets shipped to Asia, where it's often used in infant formula.
But the big surge in demand is for the concentrated protein. It started with athletes. "The bodybuilders got into this in a big way. They found that in terms of bulking up, putting muscle on their bodies, whey protein was the best protein that they could find," Bastian says.
More recently, it's spread into products for ordinary consumers. There's been a boom in high-protein drinks, thicker and more protein-rich versions of yogurt, and energy bars. "It started with PowerBar, but now you have a whole slew of protein bars," says Bastian. "Luna, Balance, the list goes on and on of different protein bar manufacturers out there that are putting proteins into bars, and these dairy proteins are a significant portion of that."
ROBERT SIEGEL, HOST:
If you've ever checked the ingredient list on a power bar or a high-protein smoothie, you've likely seen these words: whey protein concentrate. You'll find this mysterious ingredient in lots of prepared foods.
As NPR's Dan Charles reports, it comes from what cheesemakers used to throw away.
DAN CHARLES, BYLINE: When Eric Bastian was a boy on a dairy farm near the small town of Aurora, Utah, he'd load 10-gallon cans of milk on the back of a pickup truck and drive them to the local cheese factory.
ERIC BASTIAN: And we would dump the milk on the back side of the factory.
CHARLES: Inside every cheese factory, milk gets separated into solid curds and liquid whey. For every pound of curds there are nine pounds of whey. But the little factory in Aurora had no use for the whey. So, Bastian and his father would wash out their milk cans...
BASTIAN: And then we'd load them back on the truck drive and come around on the side, and fill those cans back up with whey and take it home to feed the pigs.
CHARLES: As cheese factories grew, though, and farming became more specialized, there were a lot of places where this kind of labor-intensive recycling of whey didn't happen.
BASTIAN: It was being dumped out onto fields. Some wheys were being deposited into lakes and rivers, so there was contamination of some of our water streams.
CHARLES: But now there's a whole new way to deal with whey.
(SOUNDBITE OF MACHINERY)
CHARLES: A river of milk flows into the Cabot Cheese Factory in Middlebury, Vermont; 1.6 million pounds of milk every day. Tim Opper, who's director of process technology here, shows me how the whey drains away from the curds as they're carried along on a massive, slow-moving, belt that works like a sieve.
TIM OPPER: The cheese curds come on the belt, separating the whey from the cheese. And underneath, there is a reservoir collecting that whey and we're pumping it off.
CHARLES: Alongside this cheese-making factory there's another one. It looks a lot bigger and more high-tech than the cheese plant, actually. It's a whey refinery.
(SOUNDBITE OF MACHINERY)
CHARLES: Huge rooms are filled with of shiny pipes funneling this yellowish, watery liquid through filters. The pores in these filters are so tiny and precise, they can trap big molecules like the long chains of amino acids we call proteins, while the smaller water and sugar molecules flow right through. It's all dedicated to dividing this river of whey into increasingly narrow purified streams - pure sugar; lactose, for instance, or concentrated protein.
There are even ways to fish out one specific protein, if it's valuable enough.
(SOUNDBITE OF MACHINERY)
OPPER: This is the lactoferrin processing room.
CHARLES: Lactoferrin is a protein that helps the body use iron and also fight infection. It's common in human breast milk but there's not much in cow's milk. From the million and a half pounds of milk that goes through this factory every day, the equipment in this room captures just 120 pounds of lactoferrin.
OPPER: We're just stripping out that single molecule and collecting it, processing it and drying it into a powder.
CHARLES: In bulk form that powder is worth about $225 a pound. When it's packaged as a nutritional supplement, some consumers are paying $50 for just an ounce of it.
Now, the people from Cabot Cheese say these sugar and protein products are a nice boost to their bottom-line, but their main product is still cheese. American cheese consumption is growing. But the bigger the cheese factory, the bigger the stream of whey and the more profitable the business of whey refining.
And Eric Bastian - the man who grew up hauling 10-pound cans of milk to a little cheese factory in Utah - now works for a company that runs some of the biggest cheese factories in the country: Glanbia.
Glanbia has factories that handle 10 million pounds of milk a day in the new mega-dairy states of Idaho and New Mexico. Those factories treat milk almost like crude oil, a raw material you can break apart into separate, more valuable products.
Bastian is director of research for Glanbia Nutritionals, which handles the whey processing.
BASTIAN: Depending on the markets, in any given year, the whey might actually be more valuable than the cheese.
CHARLES: That's partly because the filtering technology has improved so much, he says. But markets for whey products also have expanded. The sugar, the lactose, may end up in chocolate or baked goods. But most of it gets shipped to Asia; it's often used in infant formula.
But the big surge in demand is for the concentrated protein. It started with athletes.
BASTIAN: The bodybuilders got into this in a big way. And they found that in terms of bulking up, putting muscle on their bodies, that whey protein was the best protein they could find.
CHARLES: More recently, this protein has spread into products for ordinary consumers. There's been a boom in high protein drinks; thicker, protein-rich versions of yogurt; energy bars.
BASTIAN: It started with Power Bar but now you have a whole slew of protein bars. Luna, Balance. You know, the list goes on and on of different protein bar manufacturers out there that are putting protein into these bars. And these dairy proteins are a significant portion of that.
CHARLES: In fact, this is where more and more of the country's milk is going. Per person, Americans are drinking less of it. Instead, they're eating both curds and whey. Dan Charles, NPR News. Transcript provided by NPR, Copyright NPR.