News / USA

Seattle to Recycle Food Waste into Electricity

Food to fuel plan in the works

A Seattle company plans to recycle food into electricity.
A Seattle company plans to recycle food into electricity.

Multimedia

Audio
Ann Dornfeld

In the northwestern United States, the city of Seattle requires its residents to separate food waste from the rest of their trash. The food gets recycled into compost for lawns, gardens and, soon, into electricity.

Every day, at Cedar Grove Composting north of Seattle, truck after truck pulls into this huge warehouse to dump loads of food and yard waste.

"There's a nice mix of green waste and material. We actually have different seasons here in the tipping building," says Susan Thoman, business development director for Cedar Grove. "There's pumpkin season, that's the first of November after Halloween. We have Christmas tree season, which is obviously the first part of January after the holidays."

According to Thoman, food waste and yard waste are currently all dumped in a pile together. Then they're mixed with microbes, ground up, and poured in long, covered rows to biodegrade for a month.

Food and yard waste are currently dumped in a pile together, eventually resulting in a rich, dark pile of finished compost.
Food and yard waste are currently dumped in a pile together, eventually resulting in a rich, dark pile of finished compost.

The people who work at Cedar Grove talk about compost the way chefs talk about food. Thoman digs her hands into a rich, dark pile of the finished product.

"This is what it's all about, though, here. This is what those wonderful things we divert from the landfill turn into."

Alternative energy

Now Cedar Grove has a new recipe in mind for its food waste. Before turning banana peels and bread crusts into compost, the company wants to use them to create alternative energy.

Food waste would be separated and sprinkled with bacteria to help the food begin to break down. Then it would be poured into a closed container called an anaerobic digester, where the decomposing food would start releasing large amounts of methane.

Instead of letting that methane escape into the atmosphere, where it could contribute to global warming, Cedar Grove would suck it up and store it. Then they could burn it, to power and heat the compost facility.

Lawrence Klein, technology and development planner for Cedar Grove, says they could also convert the gas from the food waste to compressed natural gas, to fuel their trucks.

"I mean, it's a beautiful image," says Klein. "It's taking a waste product and then driving down the highway with it. I'm excited about it."

Electrifying waste

The natural gas could also provide electricity.

"That's somewhere in the lines of eight million to 10 million kilowatt hours per year," says Klein. "That's comparable to about 400-plus Seattle homes."

Turning food waste into biogas would make food recycling more profitable - especially because the food could still be used for compost after the gas-extraction process.

"Garbage is the key to sustainability," says Sally Brown, a soils scientist at the University of Washington. According to Brown, turning food scraps into energy may be new to Americans, but it's well-established in Europe.

"It's not the whole solution, but it's something that we have the technology in hand and it's something that can be done right away to provide a significant amount of electricity."

Wastewater treatment plants around the country already use anaerobic digesters to produce biogas from solid waste. Brown says food waste is even more efficient because it hasn't been eaten yet. That means it's still full of calories - and calories are energy.

Cedar Grove has gotten a million-dollar grant from the state government to pursue its food-to-fuel plan. The company is in the design and permitting phase.

Once construction starts, it could be up and running within a year.

You May Like

Photogallery US Nurse ‘Cured of Ebola,’ NIH Says

Nina Pham, Texas nurse who treated first Ebola patient in US, received no experimental drugs; WHO expects vaccine surge in 2015 More

Video Islamic State Militants Encroach on Baghdad

Iraqi capital not under ‘imminent threat,’ US military says, amid worries about foothold More

Video Hong Kong Protesters Focus on Holding Volatile Mong Kok

Activists say holding Mong Kok is key to their movement's success, despite confrontations with angry residents and police More

This forum has been closed.
Comments
     
There are no comments in this forum. Be first and add one

Featured Videos

Your JavaScript is turned off or you have an old version of Adobe's Flash Player. Get the latest Flash player.
After Decades of Pressure, Luxembourg Drops Bank Secrecy Rulesi
X
October 21, 2014 12:20 AM
European Union finance ministers have reached a breakthrough agreement that will make it more difficult for tax cheats to hide their money. The new legislation, which had been blocked for years by countries with a reputation as tax havens, was approved last week after Luxembourg and Austria agreed to lift their vetoes. But as Mil Arcega reports, it doesn’t mean tax cheats have run out of places to keep their money hidden.
Video

Video After Decades of Pressure, Luxembourg Drops Bank Secrecy Rules

European Union finance ministers have reached a breakthrough agreement that will make it more difficult for tax cheats to hide their money. The new legislation, which had been blocked for years by countries with a reputation as tax havens, was approved last week after Luxembourg and Austria agreed to lift their vetoes. But as Mil Arcega reports, it doesn’t mean tax cheats have run out of places to keep their money hidden.
Video

Video Kobani Refugees Welcome, Turkey Criticizes, US Airdrop

Residents of Kobani in northern Syria have welcomed the airdrop of weapons, ammunition and medicine to Kurdish militia who are resisting the seizure of their city by Islamic State militants. The Turkish government, however, has criticized the operation. VOA’s Scott Bobb reports from southeastern Turkey, across the border from Kobani.
Video

Video China Political Meeting Seeks to Improve Rule of Law

China’s communist leaders will host a top level political meeting this week, called the Fourth Plenum, and for the first time in the party’s history, rule of law will be a key item on the agenda. Analysts and Chinese media reports say the meetings could see the approval of long-awaited measures aimed at giving courts more independence and include steps to enhance an already aggressive and high-reaching anti-corruption drive. VOA’s Bill Ide has more from Beijing.
Video

Video US ‘Death Cafes’ Put Focus on the Finale

In contemporary America, death usually is a topic to be avoided. But the growing “death café” movement encourages people to discuss their fears and desires about their final moments. VOA’s Jerome Socolovsky reports.
Video

Video Ebola Orphanage Opens in Sierra Leone

Sierra Leone's first Ebola orphanage has opened in the Kailahun district. Hundreds of children orphaned since the beginning of the Ebola outbreak face stigma and rejection with nobody to care for them. Adam Bailes reports for VOA about a new interim care center that's aimed at helping the growing number of children affected by Ebola.
Video

Video Young Nairobi Tech Innovator on 'Track' in Security Business

A 24-year-old technology innovator in Nairobi has invented a tracking device that monitors and secures cars. He has also come up with what he claims is the most robust audio-visual surveillance system yet. As Lenny Ruvaga reports from the Kenyan capital, his innovations are offering alternative security solutions.
Video

Video Latinas Converting to Islam for Identity, Structure

Latinos are one of the fastest growing groups in the Muslim religion. According to the Pew Research Center, about 6 percent of American Muslims are Latino. And a little more than half of new converts are female. VOA’s Carolyn Presutti travelled to Miami, Florida -- where two out of every three residents is Hispanic -- to learn more.
Video

Video Exclusive: American Joins Kurds' Anti-IS Fight

The United States and other Western nations have expressed alarm about their citizens joining Islamic State forces in Syria and Iraq. In a rare counterpoint to the phenomenon, an American has taken up arms with the militants' Syrian Kurdish opponents. Elizabeth Arrott has more in this exclusive profile by VOA Kurdish reporter Zana Omer in Ras al Ayn, Syria.
Video

Video South Korea Confronts Violence Within Military Ranks

Every able-bodied South Korean male between 18 and 35 must serve for 21 to 36 months in the country’s armed forces, depending upon the specific branch. For many, service is a rite of passage to manhood. But there are growing concerns that bullying and violence come along with the tradition. Reporter Jason Strother has more from Seoul.
Video

Video North Carolina Emerges as Key Election Battleground

U.S. congressional midterm elections will be held on November 4th and most political analysts give Republicans an excellent chance to win a majority in the U.S. Senate, which Democrats now control. So what are the issues driving voters in this congressional election year? VOA National Correspondent Jim Malone traveled to North Carolina, one of the most politically competitive states in the country, to find out.
Video

Video Comanche People Maintain Pride in Their Heritage

The Comanche (Indian nation) once were called the “Lords of the Plains,” with an empire that included half the land area of current day Texas, large parts of Oklahoma, New Mexico, Kansas and Colorado.The fierceness and battle prowess of these warriors on horseback delayed the settlement of most of West Texas for four decades. VOA’s Greg Flakus reports from Lawton, Oklahoma, that while their warrior days are over, the 15,000 members of the Comanche Nation remain a proud people.
Video

Video Turkey Campus Attacks Raise Islamic Radicalization Fears

Concerns are growing in Turkey of Islamic radicalization at some universities, after clashes between supporters of the jihadist group Islamic State (IS) or ISIS, and those opposed to the extremists. Pro-jihadist literature is on sale openly on the streets of Istanbul. Critics accuse the government of turning a blind eye to radicalism at home, while Kurds accuse the president of supporting IS - a charge strongly denied. Henry Ridgwell reports from London.

All About America

AppleAndroid