From Cup To Car

Image: Daniel Leal-Olivas/AFP/Getty Images

Coffee gets us started every morning.  Now it gets your car started too.

With help from Shell Oil Company, bio-bean, a company that has been collecting London’s 220,000 tons of annually spent coffee grounds, put their new biofuel into the gas tanks of London’s famous double decker buses.  By partnering with large coffee shops like Costa Coffee and Caffe Nero, a steady stream of grounds will produce enough fuel to power a city bus for a year.

On the American front, Mano Misra’s , Susanta Mohapatra’s, and Narasimharao Kondamudi’s study has been published online in the American Chemical Society’s (ACS) Journal of Agricultural and Food Chemistry, a bi-weekly publication.  Written by Mark T.Sampson, they report that waste coffee grounds provide a cheap, abundant, and environmentally friendly source of biodiesel fuel.  They found that spent coffee grounds contain between 11 and 20 percent oil by weight, which could add an estimated 340 million gallons of biodiesel to the world’s fuel supply.

In 2016, about 143.22 billion gallons of finished motor gasoline (a complex mixture of relatively volatile hydrocarbons with or without small quantities of additives, blended to form a fuel suitable for use in spark-ignition engines) were consumed in the United States.

The new “B20” coffee-based fuel smells like java and has the major advantage of being more stable than traditional biodiesel; due to coffee’s high antioxidant content.  Solids left over from the conversion can be converted to ethanol or used as compost.  The biofuel is 20% coffee oil, while the rest of the mix comes from fossil diesel.

Biofuels burn cleaner than fossil fuels, releasing less carbon into the atmosphere, but the production and harvesting of plants destined for fuel (like corn, wheat and sugarcane) can cancel out the benefits.  Using waste products—like coffee grounds—to create fuel minimizes damage to the environment on the production end, and reduces overloading of landfill.

Through a partnership with Argent Energy, many households in the UK have begun to use this in their homes.  This is a technology I want to hear more about.

Put Put Put Off You Go

Until next time,

Garbage Girl

Advertisements

Butterfly Solar

As scientists seek ways to improve the efficiency of solar , some have increasingly turned to thin film solar cells. Such cells are lighter and more manageable than traditional crystal-based cells and are expected to be more efficient if engineers can find a way to get them to work for longer periods of time.  One of the roadblocks to improving the efficiency of is the high expense of motion hardware that tracks the sun.  In this new effort, the researchers took inspiration from the rose butterfly, found commonly in India.  It has soft black wings that warm the cold-blooded insect during cool periods.

To learn more about the , a team of researchers from California Institute of Technology and the Karlsruh Institute of Technology collected some samples and looked at them under an electron microscope.  They found that the wings were covered with scales pockmarked with holes.  In addition to making the wings lighter, the holes scattered the light striking them, which allowed the butterfly to absorb more of the sun’s heat.

In their paper, published in the journal Science Advances, the group explains their inspiration for studying the butterfly wings and the details of their improved solar cells.
Read more at: https://phys.org/news/2017-10-black-butterfly-wings-solar-cells.html#jCp

The researchers created similar structures in their lab using sheets of hydrogenated amorphous silicon sheets.  A top layer with extremely tiny holes of various sizes caused light to scatter and strike the silicon base below.   The design allowed for picking up roughly twice as much light as previous designs. The process took just five to 10 minutes.

Get off the fossil fuel grid!  Go butterfly solar.

Until next time,

Garbage Girl

Nature Tackles Carbon

Over the past two years, the world experienced unprecedented global climate momentum.  In September 2015, international leaders adopted the UN’s 17 Sustainable Development Goals to fight poverty, promote sustainability and address climate change.  Shortly after, nearly 200 countries came together in Paris to adopt the world’s largest ever international climate treaty.

At The Nature Conservancy, Bronson Griscom  radiates an optimism somewhat rare for seasoned environmentalists.  As an ecological accountant, he measures and analyzes the “carbon economy” of nature: the everyday role that trees, grasslands and coastal habitats play in the carbon cycle.  He can measure the carbon impact of logging in old growth forests, or how well different forest ecosystems work as sponges for absorbing and storing carbon from the atmosphere.  Griscom helps link our economy with the economy of the biosphere.

Encouraged by what he sees, the goals of carbon reduction the world wants to meet by 2030 are closer to possible, if we act now.  Current business-as-usual trajectories, increased emissions entering the atmosphere and continued environmental degradation will lessen the impact that nature can have.  If natural climate solutions are mobilized over the next 10 to 15 years, they could provide 37 percent of the needed mitigation for global climate targets.  But if action is delayed until after 2030, that number drops to 33 percent, and drops again to only 22 percent after 2050.

https://global.nature.org/initiatives/natural-climate-solutions/natures-make-or-break-potential-for-climate-change?src=a_f.social.facebook.site_globsol.cam_ncs.link_initative.d_oct2017.info_sci

Plant trees, create city forests, adopt a city street divider, help sponsor a GreenBelt, learn and understand how your local ecosystems contribute to carbon absorption.

Until next time,

Garbage Girl