Algen als Klimaretter?

Am Strand oder im eigenen Gartenteich oder Aquarium hat man sie ja nicht so gern: Algen.

Doch vielen verspricht das nasse Grün ein Heilmittel gegen CO2 und Klimawandel zu sein. In Hamburg soll es nun ein neues Pilot-Projekt geben, das nicht nur die Entsorgung des lästige CO2 verspricht (oder zumindest einem Teil davon), sondern auch noch die Produktion von Biomasse – etwa für Biosprit. Dazu heißt es in der Pressemitteilung:

„In einer europaweit einzigartigen Mikroalgen-Versuchsanlage wird der Klimakiller CO2 vom Schadstoff zum Rohstoff: Algen nehmen CO2 aus den Abgasen eines benachbarten Kraftwerks auf und wandeln es mit Hilfe von Sonnenlicht in Biomasse um. So gelangt weniger Kohlendioxid in die Luft und aus der Biomasse können Nahrungsmittel, Biogas oder Biodiesel hergestellt werden. Am Donnerstag wurde das Pilotprojekt im Hamburger Südosten in Betrieb genommen“.

Kernstück der Anlage seien Biophoto-Reaktoren. „Die kann man sich ein bisschen wie plattgequetschte Aquarien vorstellen», wird Dieter Hanelt vom am Projekt beteiligten Biozentrum Klein Flottbek zitiert. In den mit Wasser und Dünger gefüllten Gefäßen schwimmen laut Pressemitteilung die Mikroalgen. Die Rauchgase dienten den Algen als Futter. Ein Kilo Algen könne nach bisherigen Erkenntnissen etwa zwei Kilo CO2 aufnehmen.

Als Klimaretter sind Algen allerdings dann wohl leider doch nicht zu sehen. Etwa ein Drittel des benachbarten Blockheizkraftwerke könne man mit der Pilot-Anlage abbauen. Für Großkraftwerke wären aber anscheinend so große Algen-Plantagen notwendig, das dafür wohl schlicht der Platz fehlt.

Quelle:  www.pr-inside.com

Autor: ilona Die Welt erkunden und darüber berichten ist meine Leidenschaft. Seit über 10 Jahren tue ich dies nun als Jornalistin, Autorin und Bloggerin: ich schreibe, filme, fotografiere und mache Podcasts. Am liebsten natürlich für eine bessere Welt!
Ähnliche Artikel

2 Antworten auf "Algen als Klimaretter?"

  1. Tomas Andersson 8 Jahren ago .Antworten

    Ganz meine Meinung! Wer anders denkt hat sie nicht alle ^^

  2. Prof. Hans-Jürgen Franke - CTO La Wahie Biotech - Brasil 10 Jahren ago .Antworten

    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

Schreibe einen Kommentar