Tag: microbes

Farm Technology Harvests Trendy Subsidies

  • Ethanol often is made from corn, and one of the by-products, distillers grains, can be eaten by cows (Photo by Scott Bauer, courtesy of the USDA Agricultural Research Service)

It’s rare when a factory and a mega-farm can help reduce pollution. But a project planned in the Midwest promises just that. The project would produce a fuel additive that is thought to reduce air pollution; provide a market for farm goods; create scores of jobs… all while not harming the environment. The Ohio project is getting millions of dollars of help from the state and federal governments. But some people doubt the project will accomplish all it promises. The Great Lakes Radio Consortium’s Tamara Keith
reports:

Transcript

It’s rare when a factory and a mega-farm can help reduce pollution. But a project planned in the Midwest promises just that. The project would produce a fuel additive that is thought to reduces air pollution, provide a market for farm goods, create scores of jobs – all while not harming the environment. The Ohio project is getting millions of dollars of help from the state and federal governments. But some people doubt the project will accomplish all it promises. Tamara Keith reports:


The project is called Harrison Ethanol. It will include an ethanol factory, using millions of bushels of corn to produce the gasoline additive. At the same location, thousands of dairy and beef cattle will live in fully enclosed barns. And then there’s the small power plant, which will be fueled by manure produced by the cattle. Wendel Dreve is the project’s director.


“I think the nicest way of describing our project is it’s a vertically-integrated, agriculturally-based industrial development.”


Dreve began working on the project nearly 4 years ago. He’s retired from the oil and gas industry and built a home in eastern Ohio farm country. His neighbors approached him about starting up a corn-powered ethanol factory – something that has not existed in Ohio in a decade.


“I told them that I didn’t think we could build a ethanol plant in Ohio because there are no state subsidies, so we had to figure out a way to raise the revenue streams internally and the only way we could figure out to do that was to employ animals.”


The 12-thousand cattle housed on site, will eat the main byproduct of ethanol production, a corn mush called distillers grains. The cattle will generate money too, from sales of milk and meat. But the cattle will create manure… lots of manure… about 50 million gallons of it a year. Dreve has a solution for that, too: a power-generating anaerobic digester.


“It eliminates nearly all of the odor, it processes all of the wastes from the entire facility. So it’s like an industrial waste treatment plant on site.”


60 times a day, manure will be flushed out of the animal barns and into the digester. A large, cement structure, where the manure is broken down by microbes.


“And at the other end, you get water and methane and carbon dioxide and some solids.”


The methane will run power generators, creating “green energy,” which can be sold at a premium. The carbon dioxide from the manure will be sold to make carbonated sodas. This would be the first anaerobic digester powered by cattle manure in Ohio, and one of only a handful nationwide. Dreve says his digester will be much better for the environment than open-air manure lagoons, the cheaper method most commonly used by farmers.


But not everyone agrees. Bill Weida is an economist and director of the Grace Factory Farm Project which opposes large concentrated animal farms. Weida says most anaerobic digesters are paid for with some kind of government assistance. Harrison Ethanol is no exception. The project received a 500-thousand-dollar grant from the U.S. Department of Agriculture to help pay for the digester.


“No one in their right mind who is looking for an economic investment would build a digester. The only reason you’d build one is if you had some sort of a government subsidy that would help pay for it.”


Harrison Ethanol also is receiving seventy-million dollars in financing assistance from the state of Ohio. In fact, the company indicates it got some very good legal and accounting help, to find the perfect location for the project to take advantage of state and federal tax credits. Add to that federal ethanol subsidies and federal subsidies for corn production, and Harrison Ethanol is getting plenty of help from taxpayers.


Ken Cook is executive director of the Environmental Working Group. He says ethanol might reduce air pollution and reliance on foreign oil, but it is not economically viable without those huge taxpayer subsidies.


“The worry is that what we’re really doing is bailing out failed agriculture policy with heavily subsidized energy policy. We’re going into the corn industry with another set of subsidies to basically turn corn, that would have been exported at a loss, into corn that is used to make fuel at a loss to taxpayers.”


That’s not how state officials see it. Bill Teets is a spokesman for the Department of Development which has been working to bring several ethanol plants to Ohio.


“We think that this is a great project because you help farmers, you create manufacturing, you have something that helps benefit the environment and it seems to be a good type of project that we can really benefit from.”


And if everything goes as planned, Wendel Dreve will build 2 more ethanol and cattle operations in Ohio. He’s already secured tax dollars from state and federal sources for those plants.


For the Great Lakes Radio Consortium, I’m Tamara Keith.

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Breaking Down Groundwater Pollution

  • While the idea of cleaning up the water with bacteria may be oxymoronic, Michigan State University is saying that it works. (Photo courtesy of the National Science Foundation)

Scientists in the Great Lakes region are seeing good results from a new method that fights groundwater pollution. The Great Lakes Radio Consortium’s Erin Toner has more:

Transcript

Scientists in the Great Lakes region are seeing good results from a new method that fights groundwater pollution. The Great Lakes Radio Consortium’s Erin Toner has more:


Researchers at Michigan State University are using a process that introduces microbial bacteria into contaminated aquifers. Over time, the microbes break down hazardous waste, usually from industrial spills. Before this new technology, the most common cleanup technique was called “air stripping.” That requires groundwater to be pumped to the surface, where toxic chemicals are basically blown out of the water and into the air.


Professor Mike Dybas says the new process doesn’t leave pollution in the ecosystem.


“It’s treatment actually occurring where the pollution is, and it is physically destructive of the contaminant. So at the end of the day, the contaminants are broken down into harmless end products.”


Dybas says the process could be used in any type of industrial or agricultural spill. He says since the microbes move with the water, cleanup could stretch for miles underground.


For the Great Lakes Radio Consortium, I’m Erin Toner.

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Major Dock Corrosion Stumps Officials

  • The Duluth Seaway Port Authority's bulk cargo dock is typical of many in the port. Officials are troubled by corrosion appearing on the docks in the harbor - the steel is corroding much faster than normal. (Photo by Bob Kelleher)

Corrosion is eating away at the steel walls that hold one of the Great Lakes’ busiest harbors together. The corrosion is unlike anything known to be happening in any other Great Lakes port. But other port officials are being encouraged to take a closer look at their own underwater steel. The Great Lakes Radio Consortium’s Bob Kelleher reports:

Transcript

Corrosion is eating away at the steel walls that hold
one of the Great Lakes’ busy harbors together. The
corrosion is unlike anything known to be happening in
any other Great Lakes port. But other port officials
are being encouraged to take a closer look at their own
underwater steel. The Great Lakes Radio Consortium’s
Bob Kelleher reports:


Some kind of corrosion is eating away at the Duluth
Seaway port’s docks. The docks are those long
earth-filled metal rectangles where ships from around
the world tie up to load and unload. Those docks are
lined with sheets of steel, and the steel is rusting
away. Jim Sharrow is the Duluth
Seaway Port Authorities Facilities Manager.


“It’s corroding quickly – much faster than people expect
in fresh water. And our main concern is that we’ll lose
the integrity and the strength of the dock long before
expected, and have to do steel replacement at $1,500 or
more per lineal foot, much earlier than ever would have
been expected.”


Corrosion should be a slow process in Duluth’s cold
fresh water. But, Sharrow says, there’s evidence it’s
been happening remarkably quickly for about thirty years.


“What we seem to see here is corrosion that started in
the mid 1970s. We have steel that’s 100 years olds
that’s about as similarly corroded to steel that is 25
to 30 years old.”


It’s a big problem. There’s about thirteen miles of
steel walls lining docks in the harbor that serves
Duluth, Minnesota and Superior, Wisconsin. There’s half
again as many feet of wooden docks, held together with
steel pins. There’s corrosion on the legs of highway
bridges and the giant
steel ore docks that ship millions of tons of taconite
– a type of iron shipped to steel mills in Gary,
Indiana and Cleveland, Ohio.


“We characterize this as a 100-million dollar problem in
the harbor. It’s a huge problem, and what is so odd
about this is that we only see it happening in the
navigational area of the Duluth-Superior Harbor.”


The harbor links the St Louis River with Lake Superior.
Go a few miles up the river and there’s little corrosion
. So it doesn’t seem like the problem’s there. But, back
in the harbor, at the current rate of corrosion, Sharrow
says, the steel will fail quickly.


“I figure that in about 10 years at the current rate,
we will have to start replacing steel.”


“Particularly marginal operators could decide rather
than repair their docks it would be better for them to
go out of business, and we’re hoping that that isn’t
the case here.”


While the cause is a mystery, there’s no shortage of
theories. It could have something to do with stray
electrical voltage; water acidity; or the kinds of
steel manufactured in recent years. Chad Scott
discovered the corrosion in the late 1990’s. He’s an
engineer and a diver. Scott suspects
a micro-biological connection. He says there might be
something growing in small round pits that form on the
steel.


“We cleaned up the water. That’s the main thing –
that’s one of the main changes that’s happened since
the 70s, is we’ve cleaned up our water. We’ve cleaned
up our harbor, which is a good thing. But, when we
cleaned things up we also induced more dissolved oxygen
and more sunlight can penetrate the water, which tends
to usually promote more growth – more marine
microbiology growth.”


A team of experts met in Duluth in September to share
ideas. They came from the U.S. Navy, The Army Corp of
Engineers, and Ohio State University. And they agreed
there’s something odd going on – possibly related to
microbes or water chemistry. They also recommend that
other Great Lakes ports take a closer look at their
underwater steel. Scott says they at least helped
narrow the focus.


“We have a large laundry list right now. We want to
narrow that down and try to decide what is the real
cause of this corrosion. And these experts, hopefully,
will be able to get us going on the right direction,
so we can start doing testing that will identify the
problem.”


With the experts recommendations in hand, port
officials are now planning a formal study. If they
do figure out the cause, then they’ve got to figure
out how to prevent it. They’re in a race with
something, and right now they don’t even know with
what.


For the Great Lakes Radio Consortium, I’m Bob Kelleher.

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Study: Invasive Plants Lack Microbial Controls

  • Spotted Knapweed seed heads - Land managers work hard to control or prevent invasive plants like this one from taking root. New research may help their efforts. (Photo by Barry Rice/The Nature Conservancy)

New research indicates that some invasive plants spread rapidly because they don’t have natural enemies to keep them in check. The Great Lakes Radio Consortium’s Mark Brush explains:

Transcript

New research indicates that some invasive plants spread rapidly because they
don’t have natural enemies to keep them in check. The Great Lakes Radio
Consortium’s Mark Brush explains:


The research found that some foreign plants thrive in North America because
they’ve escaped their natural enemies. In a study published in the journal
Nature, researchers found some of the enemies the plants escaped were
in the soil. They looked at the invasive plant spotted knapweed. They found the
plants are not only free from microbes that might eat their roots, but they
also found microbes in the areas the plants invaded that actually help them
grow.


Ray Callaway is one of the researchers at the University of Montana.
He says regulations are needed to stop these kinds of invasions:


“I think we ought to have much stronger restrictions on the movement of
horticultural plants and so on from across continents. I think we’re
playing with fire.”


The majority of plant invasions come from the horticultural trade. Policymakers are now
working on a protocol to monitor the importation and sale of non-native plants.


For the Great Lakes Radio Consortium, I’m Mark
Brush.

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Irradiated Beef Passes School Lunch Program

Public health groups are criticizing a decision by the USDA to allow school districts to purchase irradiated meat. The Great Lakes Radio Consortium’s Natalie Walston reports:

Transcript

Public health groups are criticizing a decision by the USDA to allow
school districts to purchase irradiated meat. The Great Lakes Radio
Consortium’s Natalie Walston reports:


Recently the U.S. Department of Agriculture lifted its ban on irradiated
ground beef in the national school lunch program. The Public Citizens’
Critical Mass Energy and Environment Program says the USDA is
putting
children’s health at risk.


It worries possible health risks to humans
from eating irradiated meat such as ground beef are not known. The
U.S.
Food and Drug Adminstration approved irradiation of raw meat and
poultry in 1997.


It concludes it’s a safe way to reduce disease-causing
microbes. But health groups say irradiation is a way to cover up the
meat industry’s sanitation failures. The government says districts
won’t be forced to serve such meat… districts will be allowed to
choose between irradiated and non-irradiated beef… and the
government suggests districts notify parents of that decision. schools
will be allowed to purchase the meat starting in January of next year.


For the Great Lakes Radio Consortium, I’m Natalie Walston.

New Microbe Munches Pollutants

Trichloroethaneor TCA, is a solvent that contaminates groundwater and erodes the ozone layer. It is present at many polluted sites across the country. TCA comes from many common products such as glue, paint and industrial degreasers. Now scientists say they’ve found a microbe that can help clean it up. The Great Lakes Radio Consortium’s Tamar Charney reports:

Transcript

Trichloroethane or TCA is a solvent that contaminates groundwater
and erodes the ozone layer. It is present at many polluted sites across
the country. TCA comes from many common products such as glue,
industrial
degreasers, and aerosol sprays. Now scientists say they’ve found a
microbe
that can help clean it up. The Great Lakes Radio Consortium’s Tamar
Charney reports:


One way polluted water can be cleaned is to add bacteria that breaks
down the harmful substances. It is a process called bioremediation. In a
recent issue of “Science,” researchers at Michigan State University say
they’ve identified a microbe that could do this with TCA. Benjamin
Griffin is a doctoral student who worked on the project. He says they
found the bacteria in sediment in the Hudson River.


“They actually breathe TCA, so they respire it. They’re using this
chlorinated compound in the same way we use oxygen.”


The bacteria breaks down the TCA into other compounds. Those chemical
compounds can then be further broken down by other pollution-eating or
breathing bacteria. Up until now, scientists though there might not be
a
way to biodegrade TCA. For the Great Lakes Radio Consortium, I’m Tamar
Charney.

Airport Thaws De-Icing Problem

Each winter, airports around the country use more than 30 million
gallons of deicing fluid. The gooey substance prevents ice and snow from
building on a plane’s wings. However, the fluid can also seep into the
ground and pollute groundwater. It’s a costly problem for airports. But
now, one has found a unique solution. The Great Lakes Radio
Consortium’s Karen Kelly reports:

Transcript

Each winter, airports around the country use more than 30 million gallons of deicing fluid. The

gooey substance prevents ice and snow from building up on a plane’s wings. However, the fluid can

also seep into the ground and pollute groundwater. It’s a costly problem for airports. But now, one

has found a unique solution. The Great Lakes Radio Consortium’s Karen Kelly reports:


(sound of plane)


It’s a cold, overcast day in Albany, New York as a passenger plane lifts off the runway. It’s one

of the hundred or so planes that take off from here every day. At this time of year, they’ll all

have to be deiced. Steve Lachetta is the Albany airport’s planner and environmental manager.


“We’re in the Hudson River basin and our winter season extends for over 214 days, from early

October through late April or early May. Albany, being a typical small hub, uses 100 thousand

gallons of PG per year.”


PG is propylene glycol, the main ingredient in deicing fluid that makes it gooey. Any time the

temperature dips below 40 degrees, airports are required by the FCC to use PG. The problem is,

propylene glycol also seeps into the ground.


And in Albany’s case, it started showing up in the nearby Mohawk River – a local source for

drinking water. So, Albany became the first airport in the country to receive a state mandate to

clean up its deicing fluid.


“We were spending one million dollars to dispose of our winter storm water after collection. So we

tried every form of recycling the fluid, trucking it off airport. And we took a common sense

approach to cost control and became very interested in establishing biological treatment.”


In other words, Lachetta turned to microorganisms for help. He added bacteria to the dirty storm

water. And found they started digesting the propylene glycol. The bacteria broke it down into

acidic acid and then carbon dioxide and methane. The process gives the microorganisms fuel to grow.


“The manufacturers refer to propylene glycol as the filling of the Oreo cookie of the microbe world

and very readily digested so we did much experimentation and found total removal. Byproducts are 85

percent pure methane and 15 percent carbon dioxide.”


(sound inside treatment plant)


That pure methane is put to use here – providing heat for the airport’s storm water treatment

plant. It looks like something out of Willie Wonka and the Chocolate Factory. The room is filled

with a jumble of brightly colored pipes. There’s deep purple, vibrant green and canary yellow. Each

one has a special purpose.


“The large blue pipes are cycling 22 gallons per minute through the large vessels outside standing

35 feet high, 14 feet wide, and the brown pipes are the dirty storm water directly off the aircraft

aprons and the light blue pipes are for the clean water.”


Those pipes run to and from a pair of giant mixing vats. They stir up a brew of dirty storm water,

microorganisms, and some extra nutrients. It’s all cooked at a temperature of 85 degrees. And the

result is clean water.


Shelly Zuskin-Barish is the project manager for the EPA’s Airport Deicing Operations Study. She

says Albany has the most stringent treatment program in the country.


“I was very impressed when reviewing their treatment system. We found they were getting very good

removal in terms of not only propylene glycol but also an additive called tolyltriazole.”


Zuskin-Barish says there’s growing concern about tolytriazole because of its impact on aquatic

life. This is the first system she’s seen that removes it. As for propylene glycol, most airports

use a combination of recycling it and trucking it off site. Albany’s system removes more of the

pollutants, and it’s cheaper. Zuskin-Barish says Albany is on the cutting edge because it had to

be.


Albany airport has a local limit through their own state of 1 part per million propylene glycol.

For the different airports we’ve seen, that’s a very tight limit and I think in large part, pushed

them to go to this technology, which is helping them achieve those levels on a daily basis.


But now, other states – and countries – are starting to crack down as well. And Albany’s Steve

Iachetta is getting lots of visitors.


“We’ve been visited by Tokyo International, some European airports, the Department of Defense, much

larger airports, Denver, Nashville, other hubs that have come to see our early pioneering efforts.

It’s great to be on the leading edge. It’s nice to know we can contribute to improving the

environment.”


Right now, airport pollution controls differ from state to state. But next winter, the EPA will

consider national regulations to govern the disposal of deicing fluid. That may bring even more

visitors to Albany – to find out how a small airport ended up with the country’s most innovative

system.


For the Great Lakes Radio Consortium, I’m Karen Kelly in Albany, New York.