Tag: kiln

Bricks of Fly Ash

  • Fly ash particles at 2,000x magnification.

A company is using waste from
coal-burning power plants to
make bricks. The firm hopes
to reduce the amount of coal
ash sent to landfills, and,
at the same time, cut the amount
of energy used to make bricks.
Chuck Quirmbach reports:

Transcript

A company is using waste from
coal-burning power plants to
make bricks. The firm hopes
to reduce the amount of coal
ash sent to landfills, and,
at the same time, cut the amount
of energy used to make bricks.
Chuck Quirmbach reports:

The company, Calstar, says it wants to open several U.S. plants which would use fly ash in making bricks for construction and paving. The California firm says its method uses far less energy that traditional clay bricks that have to be heated at high temperatures.

Luke Pustejovsky is a Calstar executive. He insists the quality of fly ash brick meets industry standards.

“We spent 18 months and millions of dollars on durability testing with our own labs, with outside third party labs, and this is a brick that’s built to last.”

But a trade group, the Brick Industry Association, is cool to fly ash brick. The group says the product has not yet met the test of time. The group is concerned any problems that come up could discourage customers from using brick.

For The Environment Report, I’m Chuck Quirmbach.

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New Rules for Cement Pollution

  • Cement kilns produce mercury, which gets into the fish we eat making it unsafe (Photo courtesy of the US Fish and Wildlife Service)

After years of urging, the US Environmental Protection Agency is proposing regulations to cut down on pollution from cement kilns. Lester Graham reports:

Transcript

After years of urging the US Environmental Protection Agency is proposing regulations to cut down on pollution from cement kilns. Lester Graham reports:

Cement – the stuff used to make concrete – is made by baking limestone and other ingredients at really high temperatures in huge coal-burning ovens.

Burning the coal and baking the stone both release mercury. The mercury gets into the food chain and contaminates fish.

Mercury is a neuro-toxin, so eating contaminated fish can cause health problems, including IQ loss.

For 20 years Congress and the courts have been telling the EPA to do something about mercury pollution from cement kilns.

Jim Pew is a staff attorney with Earth Justice, an environmental group. It’s sued the EPA over the issue.

“The government response until now has not been to try to get mercury under control, since everybody agrees it’s a problem. The response has been to tell people ‘mercury is out there, so don’t eat the fish.’”

Under the EPA proposal, cement kilns would have to clean up the mercury and other pollution emitted from their smokestacks.

For The Environment Report, I’m Lester Graham.

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New Regs for Cement Kilns

  • Later this year the Environmental Protection Agency is going to set court-ordered standards for mercury pollution from cement kilns. (Source: LinguisticDemographer at Wikimedia Commons)

The Environmental Protection
Agency is late in setting standards
for some smokestack emissions. Lester
Graham reports:

Transcript

The Environmental Protection
Agency is late in setting standards
for some smokestack emissions. Lester
Graham reports:

Maybe you’ve never seen a cement kiln. That’s where limestone and other materials
are baked using coal to make cement, used in concrete.

Later this year the Environmental Protection Agency is going to set court-ordered
standards for mercury pollution from cement kilns.

“It’s about time, isn’t it? I mean, the standards were due more than ten years
ago.”

That’s Eric Scheaffer. He’s with the Environmental Integrity Project.

The EPA had relied on self-reported estimates on mercury pollution from the cement
kilns. Turns out, after the EPA actually checked a few of the kilns, a lot of those
mercury pollution estimates were a little low.

“They’re now saying about 23,000 pounds a year. And that’s double the
previous estimates from EPA. So, the numbers are growing.”

Most states have issued advisories about mercury contamination of fish. Mercury
can cause neurological and developmental problems with fetuses and young
children.

For The Environment Report, this is Lester Graham.

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New Rules for Haz Waste Burning

The EPA says tighter controls are coming for hundreds
of companies that burn hazardous waste. But the changes didn’t come without a fight. The Great Lakes Radio Consortium’s Chuck Quirmbach reports:

Transcript

The EPA says tighter controls are coming for hundreds of companies that burn hazardous waste, but the changes didn’t come without a fight. The Great Lakes Radio Consortium’s Chuck Quirmbach reports:


The new regulations apply to large boilers, incinerators, cement kilns, and other devices that burn hazardous waste. The EPA says it’s trying to reduce emissions of several toxic pollutants.


A few years ago, environmentalists won a legal fight to force tougher controls than the Clinton Administration had originally proposed. Earthjustice attorney Jim Pew says the EPA was told to do its job right.


“Now EPA really hasn’t done it right this time, but it’s done it better, and as the result of the work of environmental groups, we’re seeing less toxic pollution going into peoples’ homes and schools and communities.”


A group representing cement kiln owners says it’s generally satisfied with the new EPA rules, but warns that some kilns may have trouble reaching the tougher targets. The case could wind up back in court.


For the GLRC, I’m Chuck Quirmbach.

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