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These Maasai women have developed an eco-friendly way to turn invasive cacti into bio-fuel

These Maasai women have developed an eco-friendly way to turn invasive cacti into bio-fuel

In Kenya, Maasai women have found an eco-friendly solution to an invasive and hazardous plant.

Parts of the opuntia cactus are edible, but its outer layers are covered in spikes and harmful to livestock which try to graze on it.

A group of women are now transforming the prickly pear into a bio-gas and preserves.

It is bringing them a form of employment and a method of empowerment.

 

Kenya’s livestock threatened by invasive cactus

The wilderness of Laikipia County, near Nairobi, is home to goats and cattle that roam freely.

They are frequently attracted to grazing on prickly pears, but these are an invasive species which threaten the natural environment.

The cacti were introduced by colonialists in the early 1900s as a natural fence and have morphed into an invasive menace that outcompetes native plants.

Its seed gets widely dispersed by the wind and the animals that pass through.

The hairs which cover the fruit can cause internal obstructions when eaten by animals, posing a significant threat to livestock.

Local farmers say the cactus now competes for critical resources, jeopardising community lands, wildlife reserves and livestock ranches.

Its encroachment also hinders wildlife navigation as well as reducing grazing areas.

Naimadu Siranga, a 65-year-old herder, has witnessed the devastation of the cactus firsthand, leading to the loss of over 150 of his goats and sheep.

“I once maintained a herd of more than 100 goats. Unfortunately, a series of losses ensued when they started consuming cactus plants, which led to mouth injuries, severe diarrhoea, and ultimately, the demise of my livestock,” he says.

“These circumstances have inflicted significant financial setbacks.”

 

Women’s group transforms cacti into bio-fuel

Now a women’s group in Laikipia County is transforming the cacti from a problem into a new enterprise.

They harvest the prickly pear and turn it into biogas which they can use in their homes.

The Iloplei Twala Cultural Manyatta Women Group has 203 members who are now employed in converting the cactus pulp into fuel.

This approach not only eradicates the cactus but also promotes environmental conservation and offers an alternative livelihood for the women.

“We came together because in Maasai culture, women do all the domestic work and own nothing at home,” says Rosemary Nenini, a member of the group, “so we want to empower ourselves.”

The fruits from the cactus are edible for both humans and animals if separated from their sharp spines.

So the Twala women at Laikipia Permaculture are also using the fruit to create a range of products including jams, cosmetics and juices. This generates an independent income for them.

 

Cacti pose a danger to baby elephants

Loisaba Conservancy, a 58,000-acre wildlife habitat in northern Kenya, home to iconic species such as lions and wild dogs, also grapples with the invasive cactus.

Animals unwittingly facilitate the spread of this invasive plant. Baboons, elephants, guinea fowl, and tortoises consume the sweet fruit and disperse the seeds.

However, elephants, while skilled at extracting the fruit from the spiny thorns, sometimes suffer from digestive issues due to the fruit’s small hairs.

“If the elephant is young, the hairs of the fruit can irritate the gut lining, create diarrhoea and sometimes even irritation in the gut,” says Tom Silvester, the Conservancy’s Chief Executive.

Combatting this invasive species proves challenging, as it spreads aggressively, even on barren rock.

Traditional removal methods, like manual labour and burning, have proved ineffective.

Teams now use heavy machinery to uproot the cactus, transferring it to designated areas and burying it in deep pits to minimise carbon emissions during decomposition.

This strategy results in fertile zones where native plants can regenerate and flourish.

As of June 2023, Loisaba Conservancy successfully cleared 3,100 acres of opuntia, marking a significant step in the fight against this environmental menace.

Research scientist Winnie Nunda from the Centre for Agriculture and Bioscience International says it’s a step towards preserving the country’s biodiversity.

 

 


 

 

Source    euronews.green

Algae biofuel back from dead, now with carbon capture

Algae biofuel back from dead, now with carbon capture

Algae biofuel stakeholders have been stuck in the doldrums for years, but in an odd twist of fate, the fossil fuel industry could help algae make a comeback. Apparently the new plan is to pair algae farming with waste carbon from gas power plants and other industrial operations. In addition to biofuel, algae farming can also produce animal feed, fish food, nutritional supplements and toiletries for people, and bioplastic products.

 

Why Algae Biofuel?
CleanTechnica spilled plenty of ink on the area of algae biofuel research some years ago, during the Obama administration. Unlike other energy crops, algae can be grown in ponds or human-made structures without taking arable land out of circulation, and it has a rapid growth-to-harvest cycle. The high oil content of certain strains of algae is another leading attraction, and the algae R&D pathway can lead in a carbon negative direction.

On the down side, figuring out an economical way to cultivate algae and extract the oil at an industrial scale is a challenging endeavor, especially when the over-arching goal is to reduce carbon emissions rather than adding them.

The picture was looking bright in the early 2000s, up through the Obama administration. However, by the time former President Obama left office in 2016, oil prices were crashing. The relatively low cost of petroleum seemed to put the idea of a bioeconomy fueled by algae biofuel to bed.

Nevertheless, the Energy Department’s National Renewable Energy Laboratory was among those continuing to invest in algae research projects, and the algae field continued to branch off into new angles. In 2018, for example, the Energy Department was funding the algae bioplastics angle. In 2020 researchers were exploring the idea of hooking up with high speed 3-D printing. The Mars mission has also sparked a new burst of interest in the algae biofuel field.

 

Algae biofuel could have another moment in the sun, now that more federal dollars are pouring into carbon capture-and-recycling technology (photo by Dennis Schroeder, NREL).

 

Carbon Capture To The Rescue
In January of this year the Energy Department’s Bioenergy Technologies Office (BETO) launched the new AlgaePrize competition for students, aimed at developing “the next generation of bioeconomy professionals by expanding novel solutions to production, processing, and new product development on the way to gigaton-scale algae commercialization for fuel, food, products, and carbon dioxide utilization/sequestration.”

If you caught that thing about carbon dioxide, that’s where the happy dance for natural gas stakeholders comes in. Carbon capture from flue gas could turn out to be a value-added element that improves the bottom line for algae farming.

That’s where BETO seems to be heading. Last week the office announced a $16.5 million round of funding for six algae projects related to carbon dioxide capture.

The six projects were selected for their potential to demonstrate an improvement in carbon capture by algal systems leading to biofuels and other products, while also cutting costs and decreasing overall greenhouse gas emissions.

“Algae can grow on waste CO2, functioning as a carbon sink. This algae biomass can then be used to create low or no-emissions biofuels and bioproducts which displace GHGs,” BETO noted.

 

Natural Gas Hearts Algae Biofuel
Not all six of the new BETO-funded projects are focusing on carbon captured from flue gas. The Colorado School of Mines, for example, plans to put its pond-grown algae system through its paces using concentrated carbon dioxide from direct air capture.

Another awardee, Colorado State University, is working on an algal system that functions efficiently on atmospheric carbon.

Three of the other awardees are focusing on carbon dioxide from industrial fossil energy users including power plants: Dioxide Materials, MicroBio Engineering, and the University of Maryland’s Center for Environmental Sciences. A fourth awardee in the point source class is Global Algae Innovations, which is focusing more specifically on flue gas from a naphtha-fired power plant.

If the biofuel angle doesn’t work out at commercial scale, other aspects of the algae biofuel market could come into play.

Market analysts are forecasting growth in the algae market in the coming years. Consumers are on the prowl for healthy diet supplements, especially among the up-and-coming generation.

“Rise in the acceptance of algae-based food products and a growing popularity of vegan food are expected to emerge as trends in the algae market. Algae are already widely employed in bioplastics, cosmetics, food, bio-packaging, biofuel, and pharmaceutical and nutraceutical products,” observes the firm Transparency Market Research.

 

The Long Algae Biofuel Game Of ExxonMobil
All this activity puts the on-again, off-again algae biofuel journey of ExxonMobil into perspective.

ExxonMobil spearheaded the charge into shale gas after the Bush Administration lifted Clean Water Act regulations in 2006, and the company continued to double down on gas acquisitions even as prices plummeted.

 

Next Steps For Algae
ExxonMobil, for one, is excited. The company lists the following benefits compared to corn ethanol and other biofuels made from land-based energy crops:

Unlike making ethanol and biodiesel, producing algae does not compete with sources of food, rendering the food-vs.-fuel quandary a moot point.
Because algae can be produced in brackish water, including seawater, its production will not strain freshwater resources the way ethanol does.
Algae consume CO2, and on a life-cycle basis have a much lower emissions profile than corn ethanol given the energy used to make fertilizer, distill the ethanol, and to farm and transport the latter.
Algae can yield more biofuel per acre than plant-based biofuels – currently about 1,500 gallons of fuel per acre, per year. That’s almost five times more fuel per acre than from sugar cane or corn.
That’s all well and good, but it’s about time for ExxonMobil and other fossil energy stakeholders to stop digging more carbon up from the ground and start taking giant steps towards a more sustainable energy profile.

Capturing carbon dioxide at power plants is a step in the right direction, but it doesn’t change anything in terms of the local environmental impacts of fossil energy extraction, and it doesn’t make a dent in the amount of fugitive emissions escaping from drilling sites, transportation networks and storage facilities.

To the extent that algae farming at gas power plants enables more gas extraction, it’s just another form of greenhouse gas whack-a-mole.

Either way, it looks like algae farming at power plants has a window of opportunity. Last November ExxonMobil re-upped its collaboration with Synthetic Genomics, under the new name of Viridos. If you have any thoughts about that, drop us a note in the comment thread.

 


 

Source  CleanTechnica