Tag: sewage

Salmon Spawning in Sewage Plant

  • Peter Baranyai directs Wastewater Operations for the Sanitary District of East Chicago, Indiana. The plant's effluent channel looks like a natural stream and has apparently fooled wilflide into thinking so, too. (Photo by Shawn Allee)

You might not expect much good
environmental news to come from
sewage plants, but, believe it or
not, there is some on occasion.
And in one case, that good news
even involves thriving salmon.
Shawn Allee has the story:

Transcript

You might not expect much good
environmental news to come from
sewage plants, but, believe it or
not, there is some on occasion.
And in one case, that good news
even involves thriving salmon.
Shawn Allee has the story:

Sewage plants are often out of sight, out of mind, and people usually like it that way. But people who work at the water treatment plant in East Chicago, Indiana, want everyone to know about an ecological come-back story there.

I’m game. So I meet the plant director Peter Baranyai.

Allee: “You’ve got this strange mix of some really striking natural areas, rivers and streams, but then everything’s kind of dotted by industry as well, and has been for a long time. What kind of industries are we talking about in this region?”

Baranyai: “Basic steel mills, oil refineries, chemical industries also.”

Allee: “So, when they’re talking ‘heavy industry’, they really mean it here?”

Baranyai: “Yes.”

Allee: “What are we looking at here?”

Baranyai: “We’re trying to look at our discharge channel. That’s the effluent from our treatment plant. This pipe here’s a 60-inch pipe.”

Allee: “You can see the water moving out of it pretty quickly.”

The treated wast water is from nearby homes and factories. And when it leaves the pipe, you’d swear it’s a natural stream. Apparently, it’s fooled plenty of critters, including Chinook salmon.

Each Fall, salmon swim from Lake Michigan, past shipping canals, steel mills and chemical factories – just to spawn in the treated waste water.

Baranyai: “They’re not being too cooperative today because I don’t see too much.”

The salmon spawned earlier than normal this year, so, I only find dead salmon on the banks.

Baranyai: “This was a, oh, almost 4-foot chinook salmon.”

Allee: “Or the evidence of it.”

Baranyai: “And he died.”

Allee: “Again, they’re kind of programmed to die after they spawn.”

Baranyai: “Yeah, he died on the rocks here.”

The government introduced Chinook salmon to Lake Michigan decades ago, but for a long time, salmon wouldn’t spawn here, and birds and nearly everything else shied away, too.

Baranyai says one problem was that they used to disinfect water with chlorine.

Baranyai: “It’s a very effective way of disinfecting, but it continues to disinfect downstream. It’s not selective, usually anyhthing that’s alive, it usually kills. It pretty much sterilizes everything. And that’s how most water treatment plants in our country do that, still.”


Baranyai says in the late 80s, things turned around. His plant added better filters, and now, when they disinfect water, they kill bacteria with ultraviolet light, not chlorine. In just a few years, salmon started spawning – right in the plant. Plus, fresh-water sponges grow in the plant, and herons showed up. Word got around.

Roger Klocek was a biologist at Chicago’s Shedd Aquarium at the time. He learned the news from a fellow scientist.

Klocek: “I thought he was nuts, literally. What are you talking about?”

Klocek says you have to understand, for a long time people ignored water treatment plants or they expected them to remove only the worst industrial pollutants.

Klocek: “I had no idea that waste water plants themselves could actually contribute to an improved ecology.”


Allee: “Maybe the opposite, they were putting chlorine in the water or bacteria, if they weren’t disinfecting.”

Klocek: “Absolutely, you know we hear constantly that technology is going to save us and I really don’t believe that. I think we put too much stock in that, but it sure is gratifying to see when there is some technology that makes a remarkable improvement.”

Klocek says, too often, people assume industrial areas like East Chicago will always be ecological basket cases.

He says, sure there’s room for improvement, but having one concrete example of something that works? That can give you hope about what nature can do if you give it a chance.

For The Environment Report, I’m Shawn Allee.

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Sewage Treatment Missing the Mark?

  • Some people say wastewater treatment plants might not be doing a good job taking out pollutants like household chemicals and pharmaceuticals. (Photo courtesy of the US EPA)

A new study is looking at just
how well wastewater treatment
plants remove household chemicals
and pharmaceuticals from water.
Samara Freemark reports
on why some researchers are worried
that the plants aren’t doing a good
enough job:

Transcript

A new study is looking at just
how well wastewater treatment
plants remove household chemicals
and pharmaceuticals from water.
Samara Freemark reports
on why some researchers are worried
that the plants aren’t doing a good
enough job:

Most wastewater treatment plants clean water with a mix of chemicals and bacteria. But that process is decades-old. And it was designed mostly to deal with industrial pollutants.

Some people say treatment plants might not be doing a good job taking out other pollutants like household chemicals and pharmaceuticals. In fact, the treatment process can actually cause many of these pollutants to mutate – for example, some detergents break down into compounds that cause reproductive problems.

Anthony Hay is studying the issue at Cornell University.

“Hopefully they’re degraded into something non-toxic, but in some cases microbial degradation of some pollutants can actually make things worse. We need to understand what those changed products do, how they behave, and what risks they might pose.”

That’s what Hay hopes his study will help clarify.

For The Environment Report, I’m Samara Freemark.

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Stopping Septic Seepage

  • Dan Jacin stands by his newly landscaped sewage tanks (Photo by Julie Grant)

There’s an underground threat to water that’s making it harder to clean up for drinking. Julie Grant reports – it all
depends on where you live and whether the people who live nearby are maintaining their septic systems:

Transcript

There’s an underground threat to water that’s making it harder to clean up for drinking. Julie Grant reports – it all
depends on where you live and whether the people who live nearby are maintaining their septic systems:

More than one of every four homes uses its own septic
system.

That means it’s not hooked up to a city sewer line. When a
toilet is flushed, the water doesn’t go to a central treatment
plant. Instead, it drains into a septic system buried in the
yard. It’s supposed to decompose using a natural process to
clean it up before going back to the environment.

The problem is – those septics don’t get enough attention.

When they fail, as about one-in-five does, that untreated
toilet water winds up in rivers, lakes and wells. In a lot of
places, that untreated sewage drains into our sources of
drinking water.

“Well obviously, there’s potential health risks, that’s the
number one.”

Nate McConoughey is the sewage program manager with
the Board of Health in Cuyahoga County, Ohio. He spends
a lot of his time inspecting home septics to see if they’re
working.

“We don’t want these pathogens getting out into the
environment and getting into the creeks and streams and
rivers that people come in contact with.”

Or get their drinking water from.

Even though he’s trying to protect water quality,
McConoughey is not a popular guy with homeowners.

“Nobody really wants to see you come out and take a look at
their system. Because most people with 40-plus year old
systems realize that they’re probably not working as good as
they should.”

It’s McConoughey’s job – and the other inspectors he works
with – to tell people when their system is leaking sewage,
and when it’s time to put in a new system.

“We’ve all seen people with different reactions. Whether it
be crying or very irate.”

People get so upset because replacing a septic system
costs big bucks.

Just ask Dan Jacin. Last summer he had to dig up his front
lawn and put in a new set of sewage treatment tanks.

“Oh yeah, it tears up your yard for a year and hits your wallet
pretty hard.”

But Jacin says he didn’t have a choice. His 43-year old
system was backing up atrocious-smelling sewage into his
basement.

“I wanted relief from sewage coming into my house, because
that’s just not a fun deal at all.”

Jacin also had sewage burping up in his yard.

If a septic is working right, sewage drains from the house
into a tank. And it’s slowly sent from the tank into an
underground absorption area – where it filters through the
soil.

But Jacin’s septic wasn’t working anymore. The sewage
was draining off his property into a nearby stream.

(sound of a stream)

This stream runs into the Cuyahoga River, which runs into
Lake Erie – a major source of drinking water. Jacin felt
badly about causing that pollution.

But he felt even worse about paying for his new septic
system. It cost more than $20,000!

“And just fortunately I had enough money to replace it at the
time. I don’t know what I would have done if I didn’t have the
money. Who’s going to give you a loan to replace your
septic tank?”

Now Jacin’s lawn has grown back, he’s landscaped to hide
the treatment tanks. And he’s glad he’s no longer polluting
the waterways.

But he still isn’t happy about spending all that money.

Inspector Nate McConoughey understands. But he says
there are low-interest loans available for new septics – and
they’ve got to be maintained – so the water is clean for
drinking and other uses.

For The Environment Report, I’m Julie Grant.

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Who’s to Blame for the Dead Zone

  • It is predicted that the dead zone in the Gulf of Mexico is the size of the state of Massachusetts (Photo courtesy of NASA)

About 40% of the continental U-S drains into the Mississippi River. It sends water – and pollution – from across the country into the Gulf of Mexico. A new study shows just who the worst offenders are. Gabriel Spitzer has the story:

Transcript

About 40% of the continental U-S drains into the Mississippi River. It sends water – and pollution – from across the country into the Gulf of Mexico. A new study shows just who the worst offenders are. Gabriel Spitzer has the story:

All the pollution creates a dead zone in the Gulf nearly the size of New Jersey.

Nitrogen and Phosphorus pour in and fertilize big algae blooms.

When that stuff decays, it sucks oxygen out of the water, and makes it impossible for most fish to live there.

US Geological Survey researchers say most of the problem comes from farm runoff, but the single biggest source is sewage from Chicago.

Albert Ettinger with the Environmental and Law Policy Center says Chicago water managers have to catch up with their neighbors.

“They’re gonna have to look at treatment systems which take nitrogen out of the water, and bring phosphorus down to one milligram per liter. It’s done in Milwaukee, it’s done in Cleveland, it’s done in Detroit.”

Chicago’s Metropolitan Water Reclamation District say they haven’t had a chance to look closely at the study yet, so they don’t want to comment on it.

But they don’t like being singled out.

For The Environment Report, I’m Gabriel Spitzer.

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Green Fuel From Green Slime

  • Roger Ruan directs the Center for BioRefining at the University of Minnesota. He's experimenting with algae that grow quickly in the nutrients in wastewater. He says the oil-rich algae are a potential source of biodiesel. (Photo by Stephanie Hemphill)

When people talk about bio-fuels,
they usually mean ethanol from corn or diesel
fuel from soybeans. But there are lots of
possibilities. One of them is algae. Algae
contains a lot of oil. The US Department of
Energy experimented with algae for nearly
twenty years after the oil crisis of the 1970s.
But with fuel prices so high, scientists around
the world are looking at algae again. Stephanie
Hemphill reports one researcher thinks
he’s figured out how to grow lots of algae, fast:

Transcript

When people talk about bio-fuels,
they usually mean ethanol from corn or diesel
fuel from soybeans. But there are lots of
possibilities. One of them is algae. Algae
contains a lot of oil. The US Department of
Energy experimented with algae for nearly
twenty years after the oil crisis of the 1970s.
But with fuel prices so high, scientists around
the world are looking at algae again. Stephanie
Hemphill reports one researcher thinks
he’s figured out how to grow lots of algae, fast:

Roger Ruan has been trying for years to figure out how to turn algae into diesel,
economically. He’s the director of the Center for BioRefining at the University of
Minnesota.

Ruan says there’s no question it can be done; some people are already producing algae
oil. They’re growing it in open ponds. It’s used for pharmaceuticals, food supplements,
and cosmetics.

“Right now, based on an open pond system, per acre per year, you can easily get 5,000
gallons of oil, and soybean would probably give you 50. That’s 100 times difference.”

So algae can be far more efficient at producing diesel fuel than soybeans. But how do
you grow enough algae to make a dent in the nation’s energy demand?

Ruan is turning to an unlikely partner: the local sewage treatment plant.

“Wastewater has lot of nutrients: phosphorus, nitrogen, are all available in wastewater,
and actually you spend lot of money to remove these from wastewater, so if we can kill
two birds with one stone, that would be the best, and that’s what we’re hoping to do.”

(sound of treatment plant)

St. Paul, Minnesota’s sewage treatment plant sits on the bank of the Mississippi River.
The basement of the building where the solids are separated from the liquids is a
brightly lit space. It’s filled with big steel pipes and valves and tanks.

Off to one side, Ruan’s team is setting up a rack of aquariums – the future home of juicy
green algae. When everything is ready, some of the partially-treated waste will be
diverted into the tanks, where it will feed the algae.

The waste is still full of stuff that’s bad for the river, but good for algae.

“It’s got a fair amount of phosphorus, and some ammonia nitrogen that the algae are
going to need.”

Bob Polta is manager of research and development at the treatment plant.

It’s easy to see why he likes this idea: every day the facility has to remove 4 tons of
phosphorus and more than 16 tons of nitrogen from the waste stream.

The algae experiment, if it works, will allow them to do some of that removal in a more
cost-effective way. And this could be the answer to Roger Ruan’s problem of trying to
create enough algae to make enough oil to compete with petroleum diesel.

Polta says there’s a big potential, both for cleaning wastewater and for producing
energy in the same place.

“All the wastewater treatment ponds in the small communities around the state are
essentially using algae to treat wastewater; it’s just that they’re not being harvested. It’s
just that we’re getting two goals together here, and two research groups, one is essentially taking algae and
harvesting the oil and making biodiesel, and the other is using algae as a treatment
scheme, and to see if we can make this thing really fit.”

Polta expects by the end of the year he’ll know more about whether this is a practical
idea.

Roger Ruan says within six-to-ten years someone, somewhere, will be producing diesel
from algae on a commercial scale.

For The Environment Report, I’m Stephanie Hemphill.

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From the Toilet to the Tap

  • Inside the Reverse Osmosis building for the Groundwater Replenishment System in Orange County, California. (Photo courtesy of Orange County Water District)

Treated sewage water has been used to water
lawns and flush toilets before. But now the world’s
largest “toilet-to-tap” system has gone online. Mark
Brush reports on the new water treatment system:

Transcript

Treated sewage water has been used to water
lawns and flush toilets before. But now the world’s
largest “toilet-to-tap” system has gone online. Mark
Brush reports on the new water treatment system:

You think flush the toilet and it’s gone, right?

Well… that’s not happening in the O.C.

In Orange County California, the water people flush from their homes and businesses will
eventually come back to their taps.

The treated sewage water is sent to a water purification plant. It’s treated some more and
then pumped back into the aquifers where the county gets its water supply.

Mike Wehner is with the Orange County Water District. He says, at first, people kind of
held their nose at the idea:

“The biggest concern is kind of a general yuck-factor. It’s just, ‘You mean sewage? We’re
not going to drink that.’ But after people develop an understanding of the kind of
treatment processes we’re talking about, the yuck-factor diminishes, it goes away.”

Wehner says when the half billion dollar system is at its peak; it will add 70 million
gallons of recycled water a day to the areas drinking water supply.

For the Environment Report, I’m Mark Brush.

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Sewage Funding Blocked Up

Officials from local governments are lobbying Congress to put more money into wastewater treatment projects this year. Chuck Quirmbach reports:

Transcript

Officials from local governments are lobbying Congress to put more money into wastewater treatment projects this year. Chuck Quirmbach reports:

President Bush’s proposed budget would cut money for keeping up and building new sewage treatment plants. The White House wants to reduce funds for a loan program that provides money for wastewater infrastructure for municipalities and factories and stormwater management.

Gary Becker chairs the Great Lakes — Saint Lawrence Cities Initiative. He says there’s a huge need for full funding of the program.

“As population expands, as cities grow, as municipalities grow you have a constant need to expand the plants. .. in addition to being able to upgrade the ones that were put in 30 years ago when the Clean Water Act was put together.”


Becker says he hopes Congress will reverse what the President has in mind. The Bush Administration has generally said it’s trying to shrink spending on everything – except for the military – as a way to reduce the federal budget deficit.

For the Environment Report, I’m Chuck Quirmbach.

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Utilities and Wildlife

  • Land along transmission corridors, like this one, are heavily managed by power companies. (Image courtesy of Oak Ridge National Laboratory)

A new report says power, water, and sewage utilities can play a significant role in
restoring wildlife habitat. That’s because they own or control thousands of acres of land
across the country. Mark Brush has more:

Transcript

A new report says power, water, and sewage utilities can play a significant role in
restoring wildlife habitat. That’s because they own or control thousands of acres of land
across the country. Mark Brush has more:


A new report from the Environmental Law Institute says utilities can improve habitat in
many ways – including how they maintain ‘rights of way’: places where power, sewer and
water lines cut through forests and grasslands. Often companies will mow wide swaths
or use pesticides to control plants in those areas.


Jim McElfish is with the Environmental Law Institute. He says every state has a
voluntary wildlife conservation plan, and utilities can use these plans when making lots
of decisions:


“Imagine if you’re looking to do a siting of a new generating plant. Suddenly you have, in
every state and territory, a resource that tell you where the opportunities are for resource
conservation and where you’re likely to run into problems.”


McElfish says because of the vast amounts of land utilities control, it’s important for
them to take an active role in protecting wildlife.


For the Environment Report, I’m Mark Brush.

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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.

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Invasive Reeds Help Treat Wastewater

  • Phragmites, or "common reed," is being used to treat wastewater in Shelburne Falls, Massachusetts. (Photo by Adam Allington.)

Nature is often full of practical solutions to real-world problems. Take the case of sewage and wastewater treatment: for decades engineers have used mechanical means to process wastewater before disposing of the end product in landfills. It turns out that phragmites, a robust wetland reed, can do the job just as quickly and for a fraction of the cost. Adam Allington has more:

Transcript

Nature is often full of practical solutions to real-world problems. Take the case of sewage and wastewater treatment: for decades engineers have used mechanical means to process wastewater before disposing of the end product in landfills. It turns out that phragmites, a robust wetland reed, can do the job just as quickly and for a fraction of the cost. Adam Allington has more:


Brandee Nelson is wearing knee-high rubber boots. She’s wading out into a tiny patch of reeds gently swaying in the wind. They’re planted in a goopy substance that appears to be mud, but is actually…


“Sludge. We’re standing ankle deep in sludge. Sludge is the leftover solids from the conventional sewage treatment process. Things that are very organic in nature, but thin enough that you can’t really scoop it out with your hand. It’s not the consistency of yogurt, it’s more like a thin milkshake.”


That thin milkshake used to be the solid stuff that you flush down the drain. Brandee is an environmental engineer working for the village of Tivoli, New York. Today she is monitoring the growth of two recently planted reed beds. The reeds are an invasive wetland species called “phragmites,” or “common reed”. In most places these reeds are a problem because they crowd-out native plants, but here they’re doing a job.


“The whole reason to have the reed beds is really to get the largest volume reduction of your waste product. Because the sludge tends to have so much water in it, and phragmites sucks up an enormous amount of water. This bed, we’re standing in it now, this bed will be totally dry in one day.”


Even though Tivoli is relatively small at about 1000 residents, the village still produces 100,000 gallons of waste water every day. That waste water translates into a whole lot of sludge, which Tivoli then has to haul to landfills.


“We’ll probably be saving about $45,000 on hauling fees.”


Tom Cordier is deputy mayor for the village of Tivoli.


“At one point we had drying beds, and it took about a week for them to dry, and then we would come in with our backhoe and take out the dried material. But every time we got ready to do that, it would rain and we would have to start the whole process over again, and then in the wintertime it was always freezing, and finally we got to the point where we had to have it trucked away.”


Before they planted the reeds, Tivoli had to remove their liquid sludge once a month. When the reeds are fully grown, the village won’t need to haul anything away for over 10 years. But if reed bed technology is so efficient, why isn’t everyone using it?


The answer has a lot to do with the predictability of mechanics, versus the variables of biology.


“One of the issues with the reed beds is it’s a biological process. Engineers like to typically do things that are mechanical, things that fit into formulas.”


Dan Fleuriel is director of the wastewater treatment for the town of Shelburne Falls, Massachusetts. Shelburne Falls began experimenting with reed bed technology back in the early 1990’s. Unlike the short 3 foot reeds in Tivoli, the mature reeds in Shelburne Falls tower some 6 feet over us as we walk through them.


“We’ve been applying to these reed beds since 1993. It’s been very good for us because we’ve gone from a very time consuming process of de-watering sludge to something that we pretty much leave hands-off that we can rely on.”

Functionality and reliability: they’re fundamental to any civil engineering project. But Brandee Nelson notes that Tivoli’s reed beds also make sense from an environmental perspective.


“This waste product, 150,000 gallons of it, used to go to a landfill somewhere else and it wasn’t our problem any more. Now what we’re able to do is manage that waste product here on site in a relatively small footprint using a natural technology, a very low-energy technology, and in the end we’ll end up with a product that we can use for village landscaping projects.”


Tivoli’s reed beds are expected to reach full maturity by next summer. Success of the project is being followed closely by neighboring towns, who are also considering a switch to reed bed treatment plants.


For the Environment Report, I’m Adam Allington.

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