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Posts Tagged ‘sewer’

Photo: Grounds Krewe.
In the interest of environmental protection, barriers were set up to block discarded Mardi Gras parade throws and party trash from going down storm drains.

New Orleans likes to have fun, and whether it’s a funeral with a brass band playing “When the Saints Go Marchin’ In,” men high-stepping in feathers to welcome the New Year (Mummers), or the abandon of Mardi Gras before the solemnity of Lent, parades produce litter. A lot of litter.

That’s why environmentally oriented New Orleanians have decided to do something about cleaning up.

As Jackie Delamatre writes at the New York Times, “In recent years, the city’s huge, weekslong party has been producing more waste than ever: an average of 1,123 tons per year for the last decade, according to the city’s Sanitation Department.

“ ‘It’s an environmental catastrophe,’ said Brett Davis, who runs a nonprofit group, Grounds Krewe, that’s trying to make Carnival greener.

“The New Orleans area is especially vulnerable to climate change because of hurricanes and coastal erosion. Yet, for weeks of ebullient parading, which culminate on Tuesday, those problems are forgotten as float riders fling plastic beads, cups, doubloons and foam footballs at teeming crowds. In the moment, these baubles can seem like treasures. Within days, though, what was caught, as well as the excess left on the streets or dangling from oak trees like Spanish moss, ends up in the trash.

“Now, a coalition of nonprofit organizations, city officials and scientists is trying to clean up the party. … It’s not just that all this party detritus is swelling landfills. A 2013 study found that more than 60 percent of Mardi Gras beads contained unsafe levels of lead. And in 2018, the city discovered 46 tons of beads clogging catch basins that are essential for clearing floodwaters. …

” ‘When I was a kid, we caught everything that came off the floats,’ Mr. Davis said. ‘There was a big hoopla about who was going to get it. Now it’s a carpet, a river of waste.’ …

“Mr. Davis came to believe that, by reusing beads, he was just ‘recirculating toxic, plastic junk no one wants,’ he said. Now, he has pivoted to waste prevention, building a catalog of sustainable throws.

“To date, he has sold more than $1 million of these festive but practical items, including jambalaya mix, native flower starter kits and plant-based glitter. He has also recruited a cadre of volunteers, from fifth graders to retirees, to help package the goods.”

Read at the Times, here, about scientists inventing sustainable Mardi Gras beads containing okra seeds. Imagine yourself cooking the okra you grow in your gumbo and reliving happy New Orleans memories.

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Denver is now constructing what is likely the largest sewer heat-recovery project in North America.

I have no idea what leads one to a career in sewers, but judging from this story, it can involve tackling really interesting challenges to help the environment.

As Sam Brasch reported at National Public Radio, “A secret cache of clean energy is lurking in sewers, and there are growing efforts to put it to work in the battle against climate change.

“The U.S. Department of Energy estimates Americans wash enough energy down the drain every year to power about 30 million homes. The sources are often everyday items inside homes. Think hot showers, washing machines and sinks. Evolving technology is making it easier to harness that mostly warm water.

“Denver is now constructing what is likely the largest sewer heat-recovery project in North America, according to Enwave, a Canadian energy company set to operate the system.

“Over the next few years, a $1 billion remodel will turn the 250-acre site, home to the National Western Stock Show and Rodeo, into a hub for art, education and agriculture. The revamped National Western Center will include about a million square feet of new indoor space, all of which will be heated and cooled with energy from the sewer pipes below.

“Brad Buchanan, the CEO leading the redevelopment, said the project has already changed how he thinks about the best location for real estate. Big pieces of sewer infrastructure have long repelled development. Now he imagines they might be sought out as a way to save energy costs and avoid greenhouse gas emissions.

The National Western Center estimates the project will help it annually avoid the carbon equivalent of driving an average gas-powered car around the equator 250 times. …

“The technology to harvest sewer heat isn’t complicated. At the National Western Center, construction crews have already completed a pit exposing the main sewer line. The wastewater inside stays a mild 55 to 75 degrees year-round, local officials say, no matter the weather outside. That consistent temperature can be tapped to heat and cool above-ground buildings.

“The key is a massive heat pump, which will be housed in a central plant on the campus. The device works like a reversible air conditioning unit. In the winter, it will transfer energy from the sewage into a clean-water loop connecting the buildings, adding heat to indoor spaces. The process can then be flipped to keep things cool in the summer.

“And to answer an obvious question: No, the raw effluent is never exposed to the air, so people occupying the buildings won’t get hit with waves of sewer stink. …

“If sewer energy catches on, one reason could be the potential benefits for wastewater districts. That’s because warm sewage causes its own environmental problems. In Denver, wastewater is often hotter than the South Platte River, its final destination after running through a treatment plant. This ‘thermal pollution’ can imperil native plants and wildlife. …

“The National Western Center has moved to protect its supply in the event of a kind of sewer-heat gold rush. The City and County of Denver, a partner in the project, exercised a three-year option for exclusive access to the energy inside the pipelines running through the campus. Buchanan, the project CEO, said it amounts to a new sort of environmental resource. Instead of mineral rights or water rights, his development holds sewer thermal energy rights.

” ‘We have it protected because we’re counting on that energy in perpetuity,’ he said.”

More at NPR, here.

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Photo: Tokyo Five, via Gwarlingo

Back in the early days of this blog (nearly five years ago), I posted about the imaginative Japanese manhole covers that I had seen at the Gwarlingo website. Now Asakiyume has clued me in to collectable cards made from the designs.

The Japan Times has the story. “The cards will be distributed for free to anyone who wants one at sewage plants and other facilities. Pictures of the manholes will be on one side of the cards, which are roughly business card size, while explanations about their designs will feature on the reverse side.

“The manhole designs differ from area to area, and often feature flowers and animals used as symbols in respective communities, or yuru kyara (local mascots). …

“The manhole cover designs are decided after asking the public for ideas, or through a competition among manufacturers of manhole covers. [Hideto Yamada of the GKP, a group including officials from local governments and the infrastructure ministry’s sewage management department] said he hoped the cards will help lift public interest in the sewage system.”

An even better way, I think, would be create greeting cards and postcards that could be sold widely and sent around the world.

More at the Japan Times, here.

Photo: Remo Camerota, via Gwarlingo
A design for a new drain cover.

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