News / Science & Technology

Mango Pits, Coconut Shells Could Generate Electricity

Fruit shells and pits contain lots of energy

Mango pits and coconut shells can be used to generate electricity, especially in poorer regions of the world, according to a new report.
Mango pits and coconut shells can be used to generate electricity, especially in poorer regions of the world, according to a new report.

Multimedia

Audio

More than 1.5 billion people don't have access to electricity, according to the United Nations Development Program. That means, among other things, that school children with homework to do are left in the dark.

But some poor, rural areas that lack electricity may find they can generate it from something many do have plenty of: coconut shells and fruit pits.

'Very little waste'

University of Kentucky plant scientist Seth DeBolt and colleagues wanted to find a fuel that people in poor, rural areas could use to generate electricity. While on a study trip in rural Indonesia, he was struck by something he saw everywhere he went:

“The incredible efficiency at which agricultural products are used in Indonesia," DeBolt says. "There’s very little waste.”

Little waste means little left over that could be used for fuel. Farmers grew mangoes and jackfruit above coffee bushes and livestock fodder. Everything they grew was used for something. Even the scraps of fruit were fed to chickens. So growing a separate fuel crop would take land away from food crops, something DeBolt definitely wanted to avoid.

“The people at most risk with respect to energy poverty, typically they’re the same people who have food insecurity issues as it is," he says. "And any change in availability would be most detrimental to that group of people.”

Lots of energy

But there is one promising item DeBolt found in abundance that would not create competition between food and fuel.

“It’s the shell of a coconut, or the pit of a mango. And these are generally thrown out.”

Though you can’t eat it and you can’t feed it to livestock, DeBolt says a coconut shell or mango pit has a lot of energy in it.

“It compares roughly to low- to moderate-grade coal in its heating value," he says, "which is excellent.”

The same is true for the pit of an olive, peach or cherry, or the shell of an almond or walnut. All that is needed is a way to release the energy.

Turning rice hulls into electricity

DeBolt says a company in India called Husk Power is using small generators in local villages to turn rice hulls into electricity. They use a process called gasification: heating plant matter in a low-oxygen chamber releases gases that can be burned in an engine that spins a power-generating turbine.

DeBolt says his team saw the possibilities for coconut shells and mango pits.

“Hey, well these crops are growing here and these are the areas where there is potential for energy poverty to be alleviated at least in part by these small-scale production systems.”

In a new study in the Proceedings of the National Academy of Sciences, DeBolt and his colleagues used some rough calculations of coconut, mango and other fruit production and the efficiency of the gas generators. And they found in a country like Indonesia, for example, these systems could provide as much as 13 percent of the national energy needs.

Sustained energy supply

“If that’s concentrated on rural, decentralized facilities - not the big cities, which generally have a sustained energy supply - then it may have a more sustained impact on those communities.”

Other tropical countries with significant crops of coconuts, mangoes or other similar fruits could benefit, too.

However, DeBolt cautions that it is not a cure-all. There are technical issues, including how to safely handle the hazardous waste by-products of gasification. And startup funds can be hard to come by in the countries that could most benefit.

Still, he sees potential for coconut power to at least help in alleviating rural poverty.

You May Like

UN Fears Rights Violations in China-backed Projects

UNHCHR investigates link between financing development and ignoring safeguards for human rights More

Boko Haram Violence Tests Nigerians’ Faith in Buhari

New president has promised to stem insurgency; he’s scheduled to meet with President Obama at White House July 20 More

Social Media Network Wants Privacy in User’s Hands

Encryption's popularity in messaging is exploding; now it's the foundation of a new social network 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.
Making Music, Fleeing Bombs: New Film on Sudan’s Internal Refugeesi
X
Carolyn Weaver
July 06, 2015 6:47 PM
In 2012, Sudanese filmmaker Hajooj Kuka went to make a documentary among civil war refugees in Sudan’s Blue Nile and Nuba Mountains region. What he found surprised him: music was helping to save people from bombing raids by their own government. VOA’s Carolyn Weaver has more.
Video

Video Making Music, Fleeing Bombs: New Film on Sudan’s Internal Refugees

In 2012, Sudanese filmmaker Hajooj Kuka went to make a documentary among civil war refugees in Sudan’s Blue Nile and Nuba Mountains region. What he found surprised him: music was helping to save people from bombing raids by their own government. VOA’s Carolyn Weaver has more.
Video

Video Rice Farmers Frustrated As Drought Grips Thailand

A severe drought in Thailand is limiting the growing season of the country’s important rice crop. Farmers are blaming the government for not doing more to protect a key export. Steve Sandford reports from Chiang Mai, Thailand.
Video

Video 'From This Day Forward' Reveals Difficult Journey of Transgender Parent

In her documentary, "From This Day Forward", filmmaker Sharon Shattuck reveals the personal journey of her transgender father, as he told his family that he always felt he was a woman inside and decided to live as one. VOA’s Penelope Poulou has more.
Video

Video Floodwaters Threaten Iconic American Home

The Farnsworth House in the Midwest State of Illinois is one of the most iconic homes in America. Thousands of tourists visit the site every year. Its location near a river inspired the design of the house, but, as VOA’s Kane Farabaugh reports, that very location is now threatening the existence of this National Historic Landmark.
Video

Video Olympics Construction Scars Sacred Korean Mountain

Environmentalists in South Korea are protesting a Winter Olympics construction project to build a ski slope through a 500-year-old protected forest. Brian Padden reports that although there is strong national support for hosting the 2018 Pyeongchang Winter Olympics, there are growing public concerns over the costs and possible ecological damage at the revered mountain.
Video

Video Xenophobia Victims in South Africa Flee Violence, Then Return

Many Malawians fled South Africa early this year after xenophobic attacks on African immigrants. But many quickly found life was no better at home and have returned to South Africa – often illegally and without jobs, and facing the tough task of having to start over. Lameck Masina and Anita Powell file from Johannesburg.
Video

Video Family of American Marine Calls for Release From Iranian Prison

As the crowd of journalists covering the Iran talks swells, so too do the opportunities for media coverage.  Hoping to catch the attention of high-level diplomats, the family of American-Iranian marine Amir Hekmati is in Vienna, pleading for his release from an Iranian prison after nearly 4 years.  VOA’s Heather Murdock reports from Vienna.
Video

Video UK Holds Terror Drill as MPs Mull Tunisia Response

After pledging a tough response to last Friday’s terror attack in Tunisia, which came just days before the 10th anniversary of the bomb attacks on London’s transport network, British security services are shifting their focus to overseas counter-terror operations. VOA's Henry Ridgwell has more.
Video

Video Obama on Cuba: This is What Change Looks Like

President Barack Obama says the United States will soon reopen its embassy in Cuba for the first time since 1961, ending a half-century of isolation. VOA White House correspondent Luis Ramirez reports.
Video

Video Hate Groups Spread Influence Via Internet

Hate groups of various kinds are using the Internet for propaganda and recruitment, and a Jewish human rights organization that monitors these groups, the Simon Wiesenthal Center, says their influence is growing. The messages are different, but the calls to hatred or violence are similar. VOA's Mike O’Sullivan reports.
Video

Video Blind Somali Journalist Defies Odds in Mogadishu

Despite improving security in the last few years, Somalia remains one of the most dangerous countries to be a journalist – even more so for someone who cannot see. Abdulaziz Billow has the story of journalist Abdifatah Hassan Kalgacal, who has been reporting from the Somali capital for the last decade despite being blind.
Video

Video Rabbi Hits Road to Heal Jewish-Muslim Relations in France

France is on high alert after last week's terrorist attack near the city Lyon, just six months after deadly Paris shootings. The attack have added new tensions to relations between French Jews and Muslims. France’s Jewish and Muslim communities also share a common heritage, though, and as far as one French rabbi is concerned, they are destined to be friends. From the Paris suburb of La Courneuve, Lisa Bryant reports about Rabbi Michel Serfaty and his friendship bus.

VOA Blogs