Nationwide decontamination sites can recycle millions of N95 masks each day

Dr. Laurie Hommema arrived home for dinner Friday, March 13, with masks on her mind. 

It was the day President Donald Trump declared the coronavirus a national emergency, and she worried that front-line medical staff at the 12-hospital OhioHealth system where she works wouldn’t have enough protective gear.

In what turned out to be a break for medical workers, the person she confided her fears to over dinner – her husband, Kevin Hommema – is an engineer at the Battelle research institute in Columbus, Ohio.

Kevin Hommema and Dr. Laurie Hommema

He recalled a 4-year-old study that Battelle had completed for the U.S. Food and Drug Administration. It proved it is possible to decontaminate and reuse the N95 masks that have become so crucial to protecting medical workers during the pandemic.

Now, just six weeks later, Battelle-built systems that can decontaminate a combined millions of masks per day are rolling out across the country. They’re free to use for medical providers under a $400 million federal contract.

Under normal circumstances, cleaning and reusing a product that costs under a dollar and is made to be disposable makes no sense. But during the coronavirus pandemic’s protective equipment shortage, when N95 masks spark bidding warsthat drive the price up and leave many empty-handed, hospitals are looking for ways to reuse them.

In addition to Battelle’s system, which received FDA approval March 29, hospitals are starting their own decontamination and reuse programs. Virginia Commonwealth University spent about $10,000 to create a system that uses ultraviolet light to clean masks. 

Virginia Commonwealth University Medical Center built this system that uses ultraviolet light to decontaminate masks. [Dr. Stephen Kates]

In the past month, the FDA has approved four other companies to offer decontamination services for N95 masks. 

Ideally, recycling won’t be necessary for long, hospital leaders said, as production of new masks catches up to the demand and the price stabilizes. 

“Who knows what we’ll face in the future?” said Chris Clinton, vice president of shared services for OhioHealth. “It’s good to know that it’s there.”

‘All the economics changed’

Battelle’s study was among several commissioned after the H1N1 flu and SARS outbreaks that looked at the feasibility of reusing masks in the event of a global shortage.

Most studied recycling N95 respirators, the tight-fitting masks that filter out 95% of small particles and that are considered the standard for protecting medical workers. 

An N95 mask

Some studies focused on the use of plasma cleaning technology, while others studied hydrogen peroxide vapor or some ultraviolet light. All are methods hospitals already use to clean equipment and facilities. 

Battelle’s study evaluated decontaminating N95 respirators using an existing hydrogen peroxide vapor machine called the Bioquell Clarus C. The researchers found it could disinfect an N95 mask up to 20 times without degrading the mask. The elastic head strap is the first part to break down with repeated hydrogen peroxide vapor cleaning.

The study was published and publicly available on the FDA website, but Clinton, the OhioHealth vice president, said no one at the hospital system was aware of the study until the Hommemas brought it to their attention. Clinton didn’t know if anyone else at the time had thought about reusing N95 masks because they were always so readily available and cheap. 

Hospitals invest in methods to sterilize more expensive pieces of equipment where the economics of reuse make more sense. 

“Obviously all the economics changed,” Clinton said of the pandemic. 

On April 10, four weeks after the Hommemas’ dinner conversation, Battelle secured a $400 million contract with the Defense Logistics Agency on behalf of the U.S Department of Health and Human Services and the Federal Emergency Management Agency. Under it, Battelle is to offer mask recycling services free of charge to health care providers and first responders at up to 60 sites across the country. Each site will be able to decontaminate up to 80,000 masks per day. 

Ivana Vu, an airborne sensor operator, prepares newly sterilized N95 masks in Waukegan, Ill. The mask sterilization site is operated by Battelle, which received a FEMA contract. Officials say the site can sterilize as many as 80,000 masks a day.

Large hospitals go through thousands of masks in a normal week. 

As of this week, there are eight sites up and running in eight states and 12 more are being set up.

An FDA spokesperson said Battelle’s system was operational so quickly because the FDA funded the company’s 18-month study in 2014.

The agency did not say whether the study was ever shared directly with emergency management officials at FEMA or hospitals or if mask decontamination was part of any national pandemic planning before Battelle brought it up again in March. Get the Coronavirus Watch newsletter in your inbox.

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As far as the Hommemas know, the technology might never have been deployed to extend the life of N95 masks across the country if not for their dinner conversation. 

“I’m just glad it came together,” Kevin Hommema said. 

How a hospital created its own mask recycler

In early February as hospital leaders realized they would quickly run out of N95 masks with even a small surge of COVID-19 patients, the staff at Virginia Commonwealth University Medical Center in Richmond went to work to figure out how they could extend their supply. 

“It became very clear we weren’t going to get masks from the federal government,” said Dr. Stephen Kates, a professor at VCU and chair of orthopedic surgery for the hospital. 

Dr. Stephen Kates

They scoured every research lab in the university for masks and took in donations from the community. They still didn’t have enough. 

“We realized if we had a real surge, we had about a three-day’s supply and then we were going to be in the same boat as New York and everyone else,” Kates said. “So we looked at ways that we could reuse the masks.”

The team at VCU settled on ultraviolet light instead of the hydrogen peroxide vapor Battelle uses because the hospital already owned machines that use ultraviolet light to clean hospital rooms. Most U.S. hospitals have at least one such device, Kates said. VCU has six. 

The brand VCU uses is called Tru-D. Placed in a room after an infectious patient has been treated there, the machine emits ultraviolet light that kills germs, Kates said. 

To clean masks instead, Kates built a frame in his home workshop that can hold dozens of masks at the proper angle to expose them to the light. They tested angles and light intensities to find a combination that can clean each mask as many as 20 times without distorting the fit. 

VCU set up its system in an empty building across the street, the former Museum of the Confederacy. It needs three rooms: one to inspect the incoming masks, one to do the decontamination, and one to reinspect and repackage. 

A total of 24 staff members work on decontamination in shifts seven days a week. They clean up to 3,000 masks in a day. 

“We have invited other hospital systems to come see what we’re doing,” Kates said. VCU will also publish its findings in a journal so more hospitals can replicate the system. 

Both VCU and OhioHealth have a persistent problem: makeup. If staff members wear makeup and it gets on their mask, that mask must be thrown away. Germs could persist under the stain, Kates said, so there’s no way to guarantee that the mask is decontaminated.  

About 1 in 10 masks that Battelle processes must be thrown away because they’re soiled, mainly from makeup. VCU loses about 1 in 8. 

OhioHealth put out a video from its nursing manager urging staff members not to wear makeup.

A stopgap measure

All the effort to get decontamination systems up and running quickly could become moot if the market for masks stabilizes and prices go back to normal. 

“Eventually, I’m confident enough companies will make enough that we can start throwing them away again,” Kates said. “It would be cheaper to buy the masks for 30 cents.”

With Battelle’s estimated cost to clean each mask at $3.25 plus the shipping costs, the federal government’s contract covers only about three weeks of operation if 60 sites were to all run at full capacity. Currently, only eight sites are fully up and running and they aren’t processing the full 80,000 masks per day they are capable of handling.

But now that these systems have been proven to work, experts said, they can be quickly deployed in the event of a future mask shortage. 

A deal finalized last week with health care distribution giant Cardinal Health to handle the shipping between providers and the Battelle sites solved the final hurdle for those who couldn’t afford to ship thousands of masks back and forth.

Dan Cates, Regions Hospital Infection Prevention practitioner, demonstrates how used N95 masks will be sterilized using ultraviolet light at Regions Hospital in St. Paul, Minn.

In addition, said Battelle spokeswoman Katy Delaney, the research institute is setting up overnight shipping at no cost to health care providers.

“We would supply shipping labels and materials,” she said. “The organization would only need to gather and package their N95 respirators.”

That’s good news for providers like the Texas Association of Health Clinics. Director Jose Camacho looked into ways to clean and reuse masks as the nonprofit struggled to secure protective gear starting in March. 

“It’s a logistics nightmare,” he said, because they’d have to collect masks from hundreds of clinics across Texas and then redistribute them to the right places. 

He estimated between the cost he was quoted by a company to do decontamination and the estimated costs for shipping that he’d be spending $6 per mask. That was, however, less than the $7.07 purchase price per mask he was quoted the same week.

Health providers interested in working with one of Battelle’s decontamination sites should visit

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