Tag: liquids

Watering Down Airport Waste

  • The airport in Portland has installed water collection drains for passengers to dump liquids before getting on their flights. (Photo courtesy of the Port of Portland)

Three years ago, the Department
of Homeland Security passed new
regulations. If you’re a regular
flyer, you know them well: no more
bringing your drinks on the airplane.
It turns out that this ruling isn’t
just inconvenient for us – it’s also
inconvenient for the environment.
Deena Prichep reports
on the beverage restrictions, and
what one airport is doing about it:

Transcript

Three years ago, the Department
of Homeland Security passed new
regulations. If you’re a regular
flyer, you know them well: no more
bringing your drinks on the airplane.
It turns out that this ruling isn’t
just inconvenient for us – it’s also
inconvenient for the environment.
Deena Prichep reports
on the beverage restrictions, and
what one airport is doing about it:

(sound of an airport)

Modern air travel can be a hassle. We take off our shoes, take off our belts, and get rid of our drinks. Announcements like this one are so common that you barely notice them:

“Morning, folks. Make sure you drink up those beverages prior to going through. That includes bottled water, sodas, juice, coffee.”

Okay, you might notice him. That’s Roger Nelson. He’s a TSA guy at the Portland International Airport.

For most of us, following Nelson’s instructions isn’t really a big deal. But while the impact on the passenger is small, the impact on the environment can be bigger than you’d think.

After the ban on carry-on beverages was put in place, many airports saw a big rise in their checkpoint waste. At Seattle’s Sea-Tac Airport, the weight of their trash went up 25%. In the Houston Airport system, checkpoint waste collection went up 70%. Even at an airport the size of Portland’s, they estimate up to a ton of liquid per day was ending up in the waste stream.

Stan Jones is the environmental compliance manager at the Port of Portland. He watches airport trash and recycling to see how good a job they’re doing:

“If we look in the recycling at the checkpoints, people have recycled bottles, but they’re full of beverages. And one thing we don’t want in our recycling is liquids, because the recycling centers don’t want a bunch of wet papers, which wrecks the quality of the recycling. At the same time, we’re seeing if we look in the garbage at the checkpoints, same thing, we got bottles half-full of water, bottles full of water.”

Jones oversees many programs that cut waste at the airport. So he looked into tackling this problem as well. And he found that this wasn’t just an environmental problem – it was costing the airport money. Up to $100 a day in extra dump fees. The tossed-out drinks were also costing money on the staffing side. Janitors struggled to get a handle on overflowing watery trashcans.

Jenny Taylor coordinates the facilities staff.

“One of the things we did was increase the frequency in which the cans were dumped, from every two hours to half an hour. So that was almost a full-time position. That ended up being roughly $100 buck a day, or between $30 and $40,000 a year.”

So with up to $100 a day for extra dumping, and $100 a day for extra staffing, the waste was costing the Airport about $75,000 a year.

So the Port launched a program last fall to tackle the problem. They set up stainless steel collection bins right outside the security checkpoints. Twice a day they’re wheeled off, measured, and drained into modified mop sinks, by janitors like Jason Weixel.

(sound of water draining)

“And, almost 25, I’d say 24 gallons today.”

The liquids flow into the sewer system, instead of being hauled to a landfill, and the empty bottles can then be recycled.

But changing people’s recycling habits can be difficult, especially when they’re running for a flight. Many travelers still toss full bottles into the trash without even noticing the new drains.

But at the Portland International Airport, people like Roger Nelson are there to remind them.

“We do have pouring stations. Yes, the big PS, either left or right, just pour it into there. Once you do pour it, empty out, take the empty bottle with you, fill it up on the other side. Our water is cold, filtered and free. Did I get you on the free part, right?”

So far this little solution is working. The dump stations are diverting several thousand pounds of liquid from the trash every month. And the Port of Portland is working with other airports looking to set up similar systems.

For The Environment Report, I’m Deena Prichep.

Related Links

New Concerns Over Wastewater Sludge

  • Triclosan is an active ingredient in many products claiming antibacterial properties. (Photo by Kinna Ohman)

After sewage is cleaned at a wastewater treatment plant, sludge is left behind. This
sludge is often used on farms as fertilizer. But the wastewater treatment doesn’t get
rid of all the drugs and chemicals we flush down the drain. Kinna Ohman reports
researchers are finding some of these chemicals are affecting wildlife and could be
getting into our food:

Transcript

After sewage is cleaned at a wastewater treatment plant, sludge is left behind. This
sludge is often used on farms as fertilizer. But the wastewater treatment doesn’t get
rid of all the drugs and chemicals we flush down the drain. Kinna Ohman reports
researchers are finding some of these chemicals are affecting wildlife and could be
getting into our food:


Take a tour of any wastewater treatment plant and you’ll soon understand the main
objective: to separate the liquids from the solids. Until the mid 90s, most of these solids,
or sludge, used to go into landfills or were dumped in the ocean. But in 1994 the U.S.
Environmental Protection Agency started a program to promote the use of sludge on farm
fields as fertilizer. The EPA thought this was the perfect solution… turning waste into a
useful product.


But scientists have found something which could turn the EPA program on its head.
Rolf Halden is an assistant professor at the Johns Hopkins Center for Water
and Health. He says sludge contains most of the chemicals we use:


“If you look at municipal sludge, it really is a matrix that reflects the chemical footprint
of our society.”


Halden’s focused on one chemical he’s found in sludge called Triclosan – and
there’s a lot of it out there. It’s in antibacterial soaps, and can even be in our toothpastes,
deodorants, and shampoos. Until recently, most if it was thought to break down. Now,
Halden says they found something different:


“In the work that we have done at Johns Hopkins, we have demonstrated for example that
Triclosan when it enters a wastewater treatment plant is not effectively being degraded
and half of the mass is left over.”


Halden and his colleagues found this leftover mass in sludge. And since half the sludge
produced each year in the US goes to fertilize farm fields, Halden says we might want to
think about our food supply:


“We really create a pipeline of contaminants that are first discharged into the water and
then accumulated in sludge and then applied in agriculture which opens a pathway for the
contamination of the food supply and the further distribution of these chemicals in the
environment.”


At this point, scientists are still studying levels of this chemical. They haven’t even
begun to understand Triclosan’s effects in agriculture. But there’s something they do
know about it.


Researchers found Triclosan can mimic a thyroid hormone in the North American
bullfrog and disrupt its growth. When its tadpoles were exposed to low levels of
this chemical for a short amount of time, their growth into a juvenile frog was impaired.


But this doesn’t sound like that big of a deal… the frog doesn’t die, it just doesn’t grow
properly, right? Keep in mind that this study tracked exposure to Triclosan over four
hours. Halden says by spreading wastewater sludge in agriculture, we could be exposing
wildlife to chemicals like Triclosan for their entire lives.


“When these chemicals are transported into the environment with the agricultural
fertilizer, which is the municipal sludge, then they sit there for in the soil, not only for
seconds but for days and weeks and for months and to even years and in some situations
in sediments, in aquatic sediments, they can sit there for decades and this implies that
organisms are, for their lifespan, exposed to very high levels of these contaminants.
What the outcome of that is really not fully understood right now and requires more research.”


The U.S. Geological Survey has also been looking for chemicals in sludge – or biosolids –
and they’ve found steroids, antihistamines, and antidepressants. Ed Furlong, a research chemist
with the USGS in Denver, Colorado, says they are now studying how these chemicals react in agricultural
fields:


“We’ve identified that many of the compounds are consistently present in biosolids from
across the country. We’re now trying to understand what happens after those biosolids
are applied to the soil.”


The USGS is not the only agency looking at this issue. The Environmental Protection Agency has been conducting its own survey of chemicals like Triclosan in sludge. They say the results of the survey won’t be released until next
summer. Then comes the complicated process of deciding what to do with the survey
results. A decision about whether to stop using sludge with hormone disrupting
chemicals to fertilize farm fields could be years away.


For the Environment Report, I’m Kinna Ohman.

Related Links

Natural Cork Makers Unite

For hundreds of years, wine-makers have used natural cork – made
from tree bark – to seal their bottles. But natural corks are… well,
natural.
And sometimes they harbor a mold that can cause wine to go bad. Some
wine-makers are switching to synthetic corks – made of plastic – as a
solution. But right now, they only make up about one-percent of the
market. Nevertheless, natural cork manufacturers are taking action.
The
Great Lakes Radio Consortium’s Wendy Nelson reports: