Biotreibstoff – nur Skandal oder auch Chance?

30.April 2008

Mais in riesigen Mengen wird mit rasanten Wachstumsraten zu Treibstoff verarbeitet – mit skandalösen Folgen für die Lebensmittelpreise. Die Ärmsten hungern, weil die Reichsten ihre überdimensionierten Tanks scheinbar umweltfreundlich füllen wollen. Mit Recht formiert sich Widerstand gegen diesen Unsinn.

biosprit.jpg

Anders wäre es, wenn der Sprit aus Algen hergestellt würde, die in Wüstengegenden gezüchtet werden könnten. Genau das ist das Ziel einer Start-up Firma in Vancouver. Das Bild zeigt Glen Kertz, den Präsident dieser Firma vor seiner Versuchsanordnung.

algen.jpg

Photo: Valcent Products

Der Prozess arbeitet kontinuierlich. Mit Algen versetztes Wasser zirkuliert zwischen unterirdischen Tanks, in denen CO2 zugesetzt wird und den gezeigten Plastikgefässen, in denen die Algen vom Sonnenlicht bestrahlt werden. CO2 und Sonnenlicht ist es was die Algen zum Wachsen brauchen. Ab einer gewissen Algendichte wird der Zuwachs laufend geerntet.

Kertz extrapoliert, dass sein Verfahren 48 000 l Treibstoff pro Hektar liefern kann, gegen nur 40 l beim Mais. Ein weiterer Vorteil ist der praktisch geschlossene Wasserkreislauf. Mit aus Mais gewonnenem Treibstoff ist hingegen ein exzessiver Wasserverbrauch verbunden: 3500 Liter Wasser pro Liter Biosprit.

Extrapoliert man noch weiter, dann würde mit diesem Verfahren ein Zehntel der Fläche von New Mexico genügen, um den gesamten Treibstoffverbrauch der USA zu erzeugen. Das ist natürlich eine verfrühte Zukunftsspekulation aber die Experten sind sich einig, dass nichts Grundsätzliches gegen diese Vision spricht.

Ãœber die Kosten werden noch keine Angaben gemacht. Der Prozess und die verwendeten Materialien weisen aber auch diesbezüglich in eine praktikable Richtung. Trotzdem wird der Treibstoff vermutlich deutlich teurer sein als das heutige Niveau. Treibstoffeinsparungen werden deshalb auch unter dieser Perspektive zwingend nötig sein. Und damit sollte sofort begonnen werden – anstelle des unsinnigen Biotreibstoffs aus Mais.

Nähere Angaben zu diesem Prozess finden sich im IEEE Spektrum.

Autor: Klaus Ragaller

Artikel gespeichert unter: Klima

bisher 10 Kommentare Eigenen Kommentar schreiben

  • 1. Prof. Hans-Jürgen Franke - CTO La Wahie Biotech - Brasil  |  16.September 2008 at 13:38

    ETHANOL-PRODUCTION WITH BLUE-GREEN-ALGAE

    University of Hawai’i Professor Pengchen “Patrick” Fu developed an innovative technology, to produce high amounts of ethanol with modified cyanobacterias, as a new feedstock for ethanol, without entering in conflict with the food and feed-production .

    Fu has developed strains of cyanobacteria — one of the components of pond scum — that feed on atmospheric carbon dioxide, and produce ethanol as a waste product.

    He has done it both in his laboratory under fluorescent light and with sunlight on the roof of his building. Sunlight works better, he said.

    It has a lot of appeal and potential. Turning waste into something useful is a good thing. And the blue-green-algae needs only sun and wast- recycled from the sugar-cane-industry, to grow and to produce directly more and more ethanol. With this solution, the sugarcane-based ethanol-industry in Brazil and other tropical regions will get a second way, to produce more biocombustible for the worldmarket.

    The technique may need adjusting to increase how much ethanol it yields, but it may be a new technology-challenge in the near future.

    The process was patented by Fu and UH in January, but there’s still plenty of work to do to bring it to a commercial level. The team of Fu foundet just the start-up LA WAHIE BIOTECH INC. with headquarter in Hawaii and branch-office in Brazil.

    PLAN FOR AN EXPERIMENTAL ETHANOL PLANT

    Fu figures his team is two to three years from being able to build a full-scale
    ethanol plant, and they are looking for investors or industry-partners (jointventure).

    He is fine-tuning his research to find different strains of blue-green algae that will produce even more ethanol, and that are more tolerant of high levels of ethanol. The system permits, to “harvest” continuously ethanol – using a membrane-system- and to pump than the blue-green-algae-solution in the Photo-Bio-Reactor again.

    Fu started out in chemical engineering, and then began the study of biology. He has studied in China, Australia, Japan and the United States, and came to UH in 2002 after a stint as scientist for a private company in California.

    He is working also with NASA on the potential of cyanobacteria in future lunar and Mars colonization, and is also proceeding to take his ethanol technology into the marketplace. A business plan using his system, under the name La Wahie Biotech, won third place — and a $5,000 award — in the Business Plan Competition at UH’s Shidler College of Business.
    Daniel Dean and Donavan Kealoha, both UH law and business students, are Fu’s partners. So they are in the process of turning the business plan into an operating business.

    The production of ethanol for fuel is one of the nation’s and the world’s major initiatives, partly because its production takes as much carbon out of the atmosphere as it dumps into the atmosphere. That’s different from fossil fuels such as oil and coal, which take stored carbon out of the ground and release it into the atmosphere, for a net increase in greenhouse gas.
    Most current and planned ethanol production methods depend on farming, and in the case of corn and sugar, take food crops and divert them into energy.

    Fu said crop-based ethanol production is slow and resource-costly. He decided to work with cyanobacteria, some of which convert sunlight and carbon dioxide into their own food and release oxygen as a waste product.

    Other scientists also are researching using cyanobacteria to make ethanol, using different strains, but Fu’s technique is unique, he said. He inserted genetic material into one type of freshwater cyanobacterium, causing it to produce ethanol as its waste product. It works, and is an amazingly efficient system.

    The technology is fairly simple. It involves a photobioreactor, which is a
    fancy term for a clear glass or plastic container full of something alive, in which light promotes a biological reaction. Carbon dioxide gas is bubbled through the green mixture of water and cyanobacteria. The liquid is then passed through a specialized membrane that removes the
    ethanol, allowing the water, nutrients and cyanobacteria to return to the
    photobioreactor.

    Solar energy drives the conversion of the carbon dioxide into ethanol. The partner of Prof. Fu in Brazil in the branch-office of La Wahie Biotech Inc. in Aracaju – Prof. Hans-Jürgen Franke – is developing a low-cost photo-bio-reactor-system. Prof. Franke want´s soon creat a pilot-project with Prof. Fu in Brazil.

    The benefit over other techniques of producing ethanol is that this is simple and quick—taking days rather than the months required to grow crops that can be converted to ethanol.

    La Wahie Biotech Inc. believes it can be done for significantly less than the cost of gasoline and also less than the cost of ethanol produced through conventional methods.

    Also, this system is not a net producer of carbon dioxide: Carbon dioxide released into the environment when ethanol is burned has been withdrawn from the environment during ethanol production. To get the carbon dioxide it needs, the system could even pull the gas out of the emissions of power plants or other carbon dioxide producers. That would prevent carbon dioxide release into the atmosphere, where it has been implicated as a
    major cause of global warming.
    Honolulo – Hawaii/USA and Aracaju – Sergipe/Brasil – 15/09/2008

    Prof. Pengcheng Fu – E-Mail: pengchen2008@gmail.com
    Prof. Hans-Jürgen Franke – E-Mail: lawahiebiotech.brasil@gmail.com

  • 2. salomon wear  |  14.Dezember 2016 at 02:20

    “You must split in the human being thought of the eye,” Kilpatrick states. federal government isn’t really totally future about how precisely significantly cosmetic blocking the idea utilizes to recognize security dangers, Kilpatrick states the true growth throughout facebased biometrics will come with common hi-def movie. Since High definition digital cameras obtain less costly, even stores usually takes an interest in expressing files about location you recurrent stores, he says. “The only way to decide on not to take part in that will following can be to carry out the sort of methods I’m showing,” he says.
    salomon wear http://www.foothiking.com/sale-z6017-salomon-speedcross-3-cs-men-running-shoes-leather-black-blue.html

  • 3. salomon shoes new collection  |  30.Dezember 2016 at 03:44

    Online shopping is among the most strategy to use, and obtaining bowling balls sneakers isn’t different. Each and every major bowling balls alley and firm features a internet site, and many also have a label of products that could be purchased off stated website. Brunswick has its own distinct tennis balls, sneakers, tooth braces, along with other products that are being sold from its internet site, and also the identical applies to several smaller sized firms. A lot of sites promote they have inexpensive sneakers, the best price ranges, and also the top deals, however ensure you view a image from the sneakers you might be purchasing so you understand their own color and issue. Also, guarantee the website features a refund guarantee; bowling balls sneakers never always abide by regular shoes dimensions.
    salomon shoes new collection http://www.toohiking.com/for-cheap-g30138-salomon-speedcross-3-cs-men-running-shoes-black-white.html

  • 4. salomon running clothes  |  30.Dezember 2016 at 04:06

    15 sets been unsuccessful crucial assessments and only these through Facelift approved every little thing.
    salomon running clothes http://www.toohiking.com/brand-fashion-z6017-salomon-speedcross-3-cs-men-running-shoes-leather-black-blue-for-sale-cheap.html

  • 5. under armour sling backpack  |  16.April 2017 at 14:53

    Examine settlement product sales. Online shops and also outlet stores often maintain settlement product sales. Take advantage of these kinds of advertisements to make sure enormous savings. You might ask a favor from the product sales attendant and also make sure he understands to inform you if he or she have got this kind of product sales springing up. You could also sign up for e-mail groupings (whether they have one) to be able to alert you every time settlement product sales will certainly arise.
    under armour sling backpack http://www.sohiking.com/buy-under-armour-curry-anatomix-spawn-2-men-blue-free-shipping.html

  • 6. womens under armour shorts  |  16.April 2017 at 15:27

    How to locate Go-karting Footwear
    womens under armour shorts http://www.sohiking.com/sale-under-armour-curry-3-men-black-for-cheap.html

  • 7. under armour waterfowl  |  16.April 2017 at 15:57

    Temperature the actual epoxy rifle. Put a new epoxy stay in to the epoxy rifle as well as plug the idea in to the socket. Temperature the idea for approximately a few minutes prior to starting making use of. Be mindful in employing a new epoxy rifle because it can be very hot and can melt away a hand in case you manage the idea wrongly.
    under armour waterfowl http://www.sohiking.com/sale-under-armour-curry-speedform-gemini-men-black-green-outlet.html

  • 8. under armour bathing suits  |  20.April 2017 at 17:26

    With any luck , the actual 8-10 measures listed above may help ease the hangover to get on with your mood. Be sure to increase by leaving your items you don’t believe are important.
    under armour bathing suits http://www.onbackcountry.com/online-sale-under-armour-curry-basketball-shoes-men-grey-free-shipping.html

  • 9. under armour fishing shirt  |  20.April 2017 at 17:38

    Don’t dispose of timepieces together with shattered clasps or worn-out shoulder straps. You may still exchange these with handmade enjoy bands. Hand made enjoy bands give a unique, sophisticated, and even unique effect on your wardrobe. They may quickly turn into a strong trend affirmation and will also be really your eyecatcher.
    under armour fishing shirt http://www.onbackcountry.com/discount-under-armour-curry-2-men-red-for-cheap.html

  • 10. under armour locker tee  |  17.Mai 2017 at 10:23

    Prepare your hair bows. Prior to gluing the actual ornament on the clips, match the hair clips as well as bobby pin as well as headbands for the ornament you will be putting on them. This makes your work faster because you no longer have to pick which ones to put on a single show whilst gluing.
    under armour locker tee http://www.forsalomon.com/sales-on-under-armour-curry-basketball-shoes-men-grey-yellow.html

Ihr Kommentar

Pflichtfeld

Pflichtfeld, anonym

Folgende HTML-Tags sind erlaubt:
<a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <strike> <strong>

Trackback diesen Artikel  |  Kommentare als RSS Feed abonnieren