Alle Beiträge von Charnet@oekozentrum

«Wunderwaffe» Pflanzenkohle

Im Flaachtal im Zürcher Weinland startet der schweizweit erste wissenschaftlich begleitete Grossversuch mit sogenannter Pflanzenkohle in der Landwirtschaft. Sind verkohlte Pflanzenreste auf dem Acker als Bodenverbesserer tatsächlich die «Wunderwaffe» zur C02 Reduktion und verstärken gleichzeitig das Pflanzenwachstum?

Das SRF1 hat einen Beitrag über Pflanzenkohle von Toni Meier aus Flaach ausgestrahlt:
https://www.srf.ch/play/tv/schweiz-aktuell/video/wunderwaffe-pflanzenkohle?id=1b6f13de-0d2e-4180-9f02-a81d2e6bb0d1

1 Milliarde Tonnen Pflanzenkohle pro Jahr


IBI Board commits to ambitious new Vision –
1 Billion tons of biochar per year!

Members of the Board of IBI convened in Nanjing, China on October 17 – 18th for their annual board meeting to review achievements and discuss the future direction of the organization.  Board members reviewed the challenges and progress in promoting biochar in different policy initiatives in the US, Europe and China in 2016. While progress is being made, the Board would like to encourage greater progress towards building a successful biochar industry.  With that in mind the Board has updated IBI’s Vision statement to provide a clear and ambitious goal of „Generating one billion tons of biochar per year within the next 50 years“.

Our Mission: to provide a platform for fostering stakeholder collaboration, good industry practices, and environmental and ethical standards to support biochar systems that are safe and economically viable.

We will need all hands on deck to achieve this aggressive yet achievable goal.  We look forward to working with members on strategies to measure and meet this target. A new Development Committee was created to assist IBI with fundraising efforts.

IBI Memberships Now Available!

After temporarily suspending IBI membership, the IBI Board has voted to reinstate a membership model effective immediately. We encourage all those that have yet to renew their membership, to do so now via the IBI website.

IBI Asia Launched in Nanjing, China

IBI and Nanjing Agricultural University (NJAU) launched IBI Asia at a meeting hosted by Genxing Pan, IBI Board member and professor of the Institute of Resources, Ecosystem and Environment of Agriculture. Dr. Pan and his team are providing administrative services to IBI and provide an important link to biochar developments in China and Asia.  IBIS Asia will be housed at the NJAU Biochar and Green Technology Center which will include a research and innovation building, office building, feedstock and production floor, exhibit of biochar technologies, training, and lodging facilities, a greenhouse, and a wetland Eco-park. The center will operate with the support and collaboration of with Soiltec China and other organizations producing biochar products.

International Workshop on Biochar and Sustainable Agriculture

Nanjing Agricultural University (NJAU) hosted an International Workshop on Biochar and Sustainable Agriculture, October 18-25. Dr. Genxing Pan and several dignitaries opened the workshop which was attended by engineers, agronomists and soil scientists representing biochar technology providers, biochar suppliers and fertilizers companies and students. Opening presentations were from IBI board members: Johannes Lehmann, Guy Reinaud, Robert Brown, Tom Miles, Saran Sohi, Annette Cowie, and Kathleen Draper and from Stephen Joseph, Albert Bates. David Wayne and Jessica Shepherd assisted with the presentations. Workshop attendees visited NJAU biochar test plots where rice is grown with three treatments: control, Biochar + NPK fertilizer, and biochar compound fertilizer.

Rotary pyrolysis technology by Benenv. Co. Ltd. was viewed at the Nanjing Shen Rong straw Technology Co. Ltd. Which makes granulated biochar compound fertilizer. Participants also visited the new IBI Asian Center at NJAU.

NJAU continued a four-day China/ASEAN Technology Training on Biochar and Sustainable Agriculture. The workshop included lectures on biochar science, including the UNEP Global Environment Facility project, Biochar for Sustainable Soils (B4SS), biochar for environmental management and pollution control. Production technologies including straw and other wastes were described by Jiangsu Huadian Environmental Equip. Co Ltd, Jiangsu Huarui Electro Machinery Co Ltd., Tianyuan Environm Machinery Co Ltd and Benenv Co. Ltd. Participants visited a biowaste carbonization plant in Jinhua, Zhejiang Province, built by Zhejiang Jinguo Furnace Co Ltd.

3rd Asian Pacific Biomass Conference Re-cap

The 3rd Asia Pacific Biochar Conference 2016 (APBC 2016): A Shifting Paradigm towards Advanced Materials and Energy/Environment Research was held on October 19 – 23, 2016 at Kangwon National University in Chuncheon, Korea. Ron Larson attended the Conference on behalf of the Biochar Journal and has posted his early impressions of the conference.  Further analysis and reporting from the conference will be forthcoming in the Biochar Journal.

IBI responds to „Current economic obstacles to biochar use in agriculture and climate change mitigation„, an article in the magazine Carbon Management in September 2016

The study claims to review various biochar attributes and the economic viability of biochar. The call for caution against a blanket recommendation to utilize biochar without consideration of its environmental and economic viability is greatly appreciated. The questions raised are sound, and several caveats on enthusiastic projections of a global biochar industry and a universal benefit to crop yields are well founded. While the authors made a credible attempt in collecting published literature on biochar, their data assemblages are suffering from a simplistic view of how farmers or other stakeholders in a biochar industry would optimize performance of biochar.

The main points that the article presents data compilations for are:

  1. Crop yield increases as a result of biochar are low.
  2. Persistence of biochar is low.
  3. Economic viability is not demonstrated.

Crop yield

The average yield increase with most soil management indiscriminately applied globally will show highly variable and for some possibly very little if any benefit. As an example, many biochars have high pH. Such biochars applied to a calcareous soil will most likely rather decrease crop yields, which does not surprise most farmers. Since much of biochar research has been and unfortunately still is done with little explicit formulation of its anticipated effect to change specific soil or crop processes, the results of the global research effort rather resembles a shot in the dark than a focused research strategy. The disaggregation of current datasets then may serve for identifying avenues where biochar shows promise and where not,- while its average is utterly meaningless. The scientifically much more rigorous meta analyses done elsewhere provide insight in understanding drivers of crop yield changes which an average cannot.

A similarly flawed conclusion could be reached by adding irrigation to any soil world-wide and attempting to conclude from the average global response whether adding water to soil increases crop yield. In some regions, adding water will have great benefits, in others less, in yet others it may even decrease crop yield. Obviously, one wants to assess where water increases crop yield, and further, where it is economically viable to justify the investment in irrigation systems. A global average would probably lead to the conclusion that irrigation is not effective on a global scale, whereas a more nuanced analysis would identify where irrigation can be beneficial. The same point can be made for biochar or any other soil management.

Persistence of biochar

Much has been written about it, and it therefore suffices to consult the relevant literature to identify the misconception that the article propagates. It is undoubtedly correct that thermochemically converted biomass can have a range of different persistence, depending on how it was made, from what it is made, and what environmental conditions it is exposed to. The same crop residue exposed to a humid tropical environment will mineralize much quicker than that exposed to Arctic climates. Similarly, biochar made at 300C from poultry manure will have a very short half-life, whereas that made from woody material at 600C will have a very long half-life. Averaging these values glosses over the known variation in properties that are already used to predict differences in biochar mineralization. It also glosses over the fact that some users of biochar products may add it to soil to address certain soil fertility constraints and may not even be interested in the persistence of the material, for example when short-term nutrient or liming benefits are of interest. In a climate mitigation context, however, the persistence of biochar is certainly of great interest, and there is no ambiguity that biochars can be produced that have 1-2 orders of magnitude lower mineralization than the uncharred biomass, if persistence is of interest.

Economic viability

There is indeed only a nascent biochar industry at best. And crop yield increases of major cereal crops will likely be the last ones to justify biochar additions on mostly already very productive soils. Focusing solely on the lowest value crops is understandably a result of the more abundant data available for cereal crops. The economic analysis of the large variety of biochar systems, however, deserves a much more nuanced analysis than this article is able to contribute.

The IBI Online Biochar Training Course is Ongoing

Gain in-depth knowledge on biochar and biochar systems. Register for IBI’s online course, Biochar Training for Environmental Sustainability and Economic Development. This ten week, ongoing course provides participants an intensive training series on all aspects of biochar, presented by leading biochar experts. Learn about best-science updates on biochar, biochar production and use, how to overcome the barriers to commercialization. 19 separate lessons-each with a subject overview, a recorded audio/video presentation lasting 30 – 45 minutes and quizzes to test comprehension and retention. An optional introductory presentation on the basics of biochar allows participants to start the course with a common understanding. Course materials are presented in a user-friendly online format. Participants can access the course at their convenience over ten weeks and will receive a certificate of completion at the conclusion of the course.

Course materials are based on presentations from the June 2014 in-person biochar training course titled, „Biochar for Environmental Sustainability and Economic Development,“ hosted by the University of Santiago de Compostela, Spain, and developed and presented by IBI and collaborators. For more information on member and non-member pricing and registration, please see: www.biochar-international.org/online_course

Upcoming Calendar Events

  • 22nd session of the Conference of the Parties (COP 22) to the UNFCCC, November 7-18, 2016; Marrakech, Morocco
  • 2016 International Annual Meeting of the American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America, „Resilience Emerging from Scarcity and Abundance,“ on Nov. 6-9, 2016, in Phoenix, AZ
  • ICSSM 2017 : 19th International Conference on Soil Science and Management, Durban, South Africa, January 12 – 13, 2017
  • Ecological Farming Association (EcoFarm) conference, Cultivating Diversity Jan 25-28, 2017, Pacific Grove, CA @Eco_Farm
  • Guelph Organic Conference January 26-19,217, Guelph University Center, Guelph Ontario, Canada  @GuelphOrganic
  • 1st International Conference on Climate Change 2017 (ICCC 2017), February 16 -17, 2017 in Colombo, Sri Lanka under the theme „Climate Change, Facing the challenge beyond COP21„; NOTE: Abstracts being accepted through December 15, 2016

See the IBI Calendar page for more events. To add an event to the calendar, send the information to info@biochar-international.org.

Recently Published Biochar Research and Resources

„MAKING BIOCHAR – WITH TECHNICAL MANUAL“ By Brian Lewis; The book is available to purchase for $9.99 direct from www.strongandbold.com.

Dominic Woolf, Johannes Lehmann, David R. Lee. Optimal bioenergy power generation for climate change mitigation with or without carbon sequestration. Nature Communications, 2016; 7: 13160 DOI: 10.1038/ncomms13160  (See IBI’s press release on this here)

The Biochar Journal, by Ithaka Institute, https://www.biocharjournal.org/en @BiocharJournal

If you have published work that is not included, please email us.

Published in ISI journals in October 2016:

Zha, DW, Li, LF, Pan, YX, He, JB; Coconut shell carbon nanosheets facilitating electron transfer for highly efficient visible-light-driven photocatalytic hydrogen production from water, INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, Oct 19, 2016, 41, 39, 17370 – 17379; 10.1016/j.ijhydene.2016.07.227

Xu, G., Zhang, Y., Sun, JN., Shao, HB.; Negative interactive effects between biochar and phosphorus fertilization on phosphorus availability and plant yield in saline sodic soil, SCIENCE OF THE TOTAL ENVIRONMENT, Oct 15, 2016, 568, 910 – 915, 10.1016/j.scitotenv.2016.06.079

Dari, B, Nair, VD, Harris, WG, Nair, PKR, Sollenberger, L, Mylavarapu, R.; Mylavarapu, Rao, Relative influence of soil- vs. biochar properties on soil phosphorus retention, GEODERMA, Oct 15, 2016, 280, 82 – 87, 10.1016/j.geoderma.2016.06.018

J Cai, WF, Liu, RH, Performance of a commercial-scale biomass fast pyrolysis plant for bio-oil production, FUEL, Oct 15, 2016, 182, 677 – 686, 10.1016/j.fuel.2016.06.030

Soysa, R, Choi, YS, Kim, SJ, Choi, SK, Fast pyrolysis characteristics and kinetic study of Ceylon tea waste, INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, Oct 5, 2016, 41, 37, SI, 16436 – 16443, 10.1016/j.ijhydene.2016.04.006

Shen, ZT, McMillan, O, Jin, F., Al-Tabbaa, A, Shen, Zhengtao, McMillan, Oliver, Jin, Fei
Al-Tabbaa, Abir, Salisbury biochar did not affect the mobility or speciation of lead in kaolin in a short-term laboratory study, JOURNAL OF HAZARDOUS MATERIALS, Oct 5, 2016, 316, 214 – 220, 10.1016/j.jhazmat.2016.05.042

DeVallance, DB., Oporto, GS., Quigley, P.; Investigation of hardwood biochar as a replacement for wood flour in wood-polypropylene composites, JOURNAL OF ELASTOMERS AND PLASTICS, Oct 2016, 510 – 522, 10.1177/0095244315589655

Rodriguez-Vila, A., Asensio, V., Forjan, R., Covelo, EF; Carbon fractionation in a mine soil amended with compost and biochar and vegetated with Brassica juncea L, JOURNAL OF GEOCHEMICAL EXPLORATION, Oct 2016, p 137 – 143, 10.1016/j.gexplo.2016.07.021

Cai, WZ, Zhou, Q., Xie, YM, Liu, J., Long, GH, Cheng, S., Liu, ML; A direct carbon solid oxide fuel cell operated on a plant derived biofuel with natural catalyst; APPLIED ENERGY; Oct 1, 2016, p 1232 – 1241, 10.1016/j.apenergy.2016.07.068

Wu, HP, Zeng, GM, Liang, J., Chen, J., Xu, JJ, Dai, J. Li, XD, Chen, M., Xu, PA, Zhou, YY, Li, F., Hu, L., Wan, J.; Responses of bacterial community and functional marker genes of nitrogen cycling to biochar, compost and combined amendments in soil; APPLIED MICROBIOLOGY AND BIOTECHNOLOGY; Oct 2016; p 8583 – 8591; 10.1007/s00253-016-7614-5

Kantarli, IC, Kabadayi, A., Ucar, S., Yanik, J.; Conversion of poultry wastes into energy feedstocks; WASTE MANAGEMENT; Oct 2016, p 530 – 539; 10.1016/j.wasman.2016.07.019

Baltrenaite, E., Lietuvninkas, A., Baltrenas, P.,; Modelling the Balance of Metals in the Amended Soil for the Case of ‚Atmosphere-Plant-Soil‘ System; ENVIRONMENTAL MODELING & ASSESSMENT; Oct 2016; p 577 – 590; 10.1007/s10666-016-9505-7

Brassard, P., Godbout, S., Raghavan, V.; Soil biochar amendment as a climate change mitigation tool: Key parameters and mechanisms involved; JOURNAL OF ENVIRONMENTAL MANAGEMENT; Oct 1, 2016, p 484 – 497, 10.1016/j.jenvman.2016.06.063

Manolikaki, II, Mangolis, A., Diamadopoulos, E, The impact of biochars prepared from agricultural residues on phosphorus release and availability in two fertile soils; JOURNAL OF ENVIRONMENTAL MANAGEMENT; Oct 1, 2016, p 535 – 543; 10.1016/j.jenvman.2016.07.012

Brendova, K., Zemanova, V., Pavlikova, D., Tlustos, P., Utilization of biochar and activated carbon to reduce Cd, Pb and Zn phytoavailability and phytotoxicity for plants; JOURNAL OF ENVIRONMENTAL MANAGEMENT; Oct 1, 2016; p 636 – 645; 10.1016/j.jenvman.2016.06.042

Hartley, W Riby, P Waterson, J., Effects of three different biochars on aggregate stability, organic carbon mobility and micronutrient bioavailability; JOURNAL OF ENVIRONMENTAL MANAGEMENT; Oct 1, 2016 p 770 – 778; 10.1016/j.jenvman.2016.07.023

Petkova, V., Serafimova, E., Kostova, B., Thermal behaviour of nitric-acid-treated biomass and chicken litter mixtures; JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY; Oct 2016, p 149 – 160; 10.1007/s10973-016-5708-z

Colantoni, A, Evic, N., Lord, R., Retschitzegger, S., Proto, AR, Gallucci, F., Monarca, D., Characterization of biochars produced from pyrolysis of pelletized agricultural residues; RENEWABLE & SUSTAINABLE ENERGY REVIEWS; Oct 2016; p 187 – 194; 10.1016/j.rser.2016.06.003

Jeffery, S., Verheijen, FGA, Kammann, C., Abalos, D., Biochar effects on methane emissions from soils: A meta-analysis; SOIL BIOLOGY & BIOCHEMISTRY; Oct 2016, p 251 – 258; 10.1016/j.soilbio.2016.07.021

Yang, YX, Zhang, WH, Qiu, H., Tsang, DCW, Morel, JL, Qiu, RL, Effect of coexisting Al(III) ions on Pb(II) sorption on biochars: Role of pH buffer and competition; CHEMOSPHERE, Oct 2016, p 438 – 445, 10.1016/j.chemosphere.2016.07.007

Wang, DY, Griffin, DE, Parikh, SJ, Scow, KM; Impact of biochar amendment on soil water soluble carbon in the context of extreme hydrological events; CHEMOSPHERE; Oct 2016, p 287 – 292, 10.1016/j.chemosphere.2016.06.100

Li, YL, Ruan, GD, Jalilov, AS , Tarkunde, YR, Fei, HL, Tour, JM; Biochar as a renewable source for high-performance CO2 sorbent; CARBON, Oct 216, p 344 – 351; 10.1016/j.carbon.2016.06.010

Xu, P., Sun, CX, Ye, XZ, Xiao, WD, Zhang, Q., Wang, Q; The effect of biochar and crop straws on heavy metal bioavailability and plant accumulation in a Cd and Pb polluted soil; ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY; Oct 2016, p 94 – 100, 10.1016/j.ecoenv.2016.05.031

Yang, ZM, Fang, ZQ, Zheng, LC, Cheng, W., Tsang, PE, Fang, JZ, Zhao, DY; Remediation of lead contaminated soil by biochar-supported nano-hydroxyapatite; ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY; Oct 2016, p 224 – 230; 10.1016/j.ecoenv.2016.06.008

Yang, G., Sun, Y., Zhang, JP., Wen, C., Fast carbonization using fluidized bed for biochar production from reed black liquor: optimization for H2S removal; ENVIRONMENTAL TECHNOLOGY; Oct 2016, p 2447 – 2456, 10.1080/09593330.2016.1151463

Pyrolysefestival 2016

Liebe Freunde der Kohle!

Herzlich laden wir Euch für das diesjährige Pyrolysefestival auf der Stadionbrache Hardturm Zürich ein. Dieses findet nächsten Sonntag, am 13.11.2016 ab 13:00h statt. Folgendes Programm ist geplant:

13:00h Vorstellung verschiedener in der Schweiz entwickelter TLUD-Mikropyrolysatoren.

15:00h Einsatz der Pflanzenkohle am Beispiel der Stadionbrache: Kochen, Zerkleinern, Kompost, Garten.

16:00h Erfahrungs- und Wissensaustausch aller Entwickler, Anwender, Gärtner, Bauer und Interessierten.

Für das leibliche Wohl sorgen wir mit einer Herbstsuppe, Kaffe & Tee. Kuchen und Gebäck sind sehr willkommen und wir möchten Euch bitten etwas mitzunehmen!

Wir freuen uns auf einen spannenden Sonntagnachmittag und hoffen gutes Wetter:)

Im Anhang findet Ihr einen kleinen Flyer. Gerne dürft Ihr all eure Freunde und Bekannten und an Pyrolyse oder Pflanzenkohle Interessierten Personen aufmerksam machen und mitbringen.

Freundliche Grüsse

Lorenz de Vallier & Lukas Bühler

Projektvorstellung

Anlässlich einer Projektvorstellung an Vertreter der Neumann Gruppe aus Hamburg besuchte uns am 14. April auch Ulli Suer, Geschäftsführer von BioMaCon. BioMaCon produziert bereits vollautomatische Heizkessel, die Pflanzenkohle erzeugen und gleich in BigBags abfüllen. Die Anlagen werden in 6 Baugrössen, bzw. nach Kundenwunsch gebaut. Der Leistungsbereich erstreckt sich von 25 bis über 400 kW Heizleistung. Ideal für kleine Landwirtschaftsbetriebe bis hin zu kommunalen Anlagen oder für Grossgärtnereien mit Gewächshäusern. www.biomacon.com

Interessenten aus der Nord-West-Schweiz können sich bei Kaskad-E.ch melden
Interessenten aus der Ostschweiz bei Martin Bläsi, us@kuhvilla.ch

 

 

Die Zukunft ist klimapositiv!

 

Dekarbonisation und Energie-Erzeugung geht gleichzeitig. Die Zukunft ist klimapositiv!

Die Pflanzenkohle birgt das Potential, den gesamten vom Menschen verursachten Anstieg des Kohlenstoffs in der Atmosphäre zu kompensieren oder gar rückgängig zu machen. Alleine die Verkohlung von jährlich 1 kg Ernterückstände zu 200gr Pflanzenkohle und deren Rückführung in den Humusboden auf jedem Quadratmeter Ackerland dieses Planeten, würde sämtliche menschgemachten Klimagas-Emissionen kompensieren. Diese Massnahme würde aber nicht nur global dem Klima nützen, sondern auch lokal die Bodenfruchtbarkeit und die Toleranz gegenüber Dürre und Staunässe der Böden erhöhen, sowie den Nährstoff-Rückhalt verbessern und damit auch gleichzeitig weitere Klimagas-Emissionen wie Lachgas und Methan aus der Landwirtschaft reduzieren. Gleichzeitig stellt die Pyrolyse von Biomasse-Reststoffen und auch anderen Kohlenwasserstoffen (fossile in Form von Kunststoff-Abfällen oder anderen Erdölprodukten) die sauberste Form der Verbrennung dar, bringt also auch Verbesserungen der Lufthygiene.

 

Terra Preta: Dekarbonisierung mit Zusatznutzen für Energieversorgung und Landwirtschaft

Terra Preta [portug: „schwarze Erde“]: Die fruchtbarsten Erden der Welt sind Schwarzerden, wie sie in der Ukraine und in 150 Fundstätten im Amazonas-Becken gefunden wurden. Alle enthalten hochporöse Pflanzenkohle, jene in der Ukraine entstand durch natürliche Steppenbrände über zehntausende Jahre hinweg, jene am Amazonas entstand von Menschenhand: Holzkohle wurde mit Fäkalien, Urin und Grüngut zu neuer Erde kompostiert. Die Funde im Amazonas-Becken sind 3‘000 bis 7‘000 Jahre alt – die Kohlestücke noch vollständig erhalten, oxidieren gemäss bisheriger Forschung in allen Bodenarten deutlich weniger als 3% pro 100 Jahre. Die mit Pflanzenkohle erzeugten Schwarzerden sind mindestens so wertvoll wie die besten Torferde-Erzeugnisse auf dem Markt, wie die Forschung der Universität Giessen mit Produkten aus der Schweiz und Deutschland zeigte. Die Wirkung von Pflanzenkohle-Gaben ist sehr vielfältig: die riesige Oberfläche von mehreren Hundert Quadratmeter pro Gramm Gewicht und der hohe pH-Wert bewirken eine immense Speicherfähigkeit für Flüssigkeiten und Gase und einen Ausgleich für Böden, die nach einer Düngung oft sauer werden. So werden Böden widerstandsfähiger gegen extreme Wetter-Ereignisse, toleranter gegen zu viel oder zu wenig Wasser und Dünger und halten beides besser zurück, was wiederum einen positiven Klimaeffekt hat und weniger „stinkt“. Dies lässt Pflanzenkohle einen Marktwert zukommen, der weltweit zwischen 550 und über 1‘000 CHF/Tonne liegt. Dies alleine würde schon ausreichen, um die Herstellung von Pflanzenkohle zu einem interessanten Geschäft zu machen, d.h. der Klimaschutz wäre bereits kostenlos. Nun kommt aber noch die Energie dazu, die bei der Pyrolyse ebenfalls entsteht – in Form von Wärme und im besten Fall auch Strom. Die Energieerzeugung birgt maximal noch einmal etwa gleichviel finanziellen Erlös.

Pro Tonne aus der Atmosphäre langfristig und sicher abgeschiedenem CO2 werden bis zu 600 kWh Strom, sowie 2000 kWh Wärme und 273 kg Pflanzenkohle erzeugt – mit einem Marktwert von zusammen 370 bis 500 CHF. Zum Vergleich: Der internationale Marktwert von Klimagas-Vermeidung liegt zurzeit unterhalb von 4 CHF pro Tonne CO2.

 

Relevanz

Millionen Tonnen Reststoffe können zu einer stofflichen und gleichzeitig energetischen Nutzung zugeführt werden – mit einem globalen Klimanutzen, der das Potential hat, den gesamten Klimagas-Ausstoss der Menschheit zu kompensieren. Typische Einsatzstoffe sind: Kaffee-Pulpe, Reisspelzen, Nussschalen, Stroh, Rinde, Papierschlamm, Klärschlamm, Gärreste, Landschafts­pflege-Schnitt, Wurzelstöcke, Schwemmholz, mit Kunststoff-Abfällen und Mineralstoffen durch­mischte Biomasse, sowie Strassen-Asphalt-Bruchstücke. Es könnten aber langfristig auch sämtliche Kohlenwasserstoffe von Holz bis Erdöl so genutzt werden, sodass der Wasserstoff-Anteil weiterhin energetisch genutzt wird und der Kohlenstoff aber abgeschieden wird und der stofflichen Nutzung zugeführt wird. Gleichzeitig ermöglicht die erzeugte Kohle auch die Rückgewinnung von versteppten, erodierten Landwirt­schafts­flächen.

 

Zusammenfassung

Die Pyrolyse von kohlenstoffhaltigen Reststoffen ist vermutlich die aussichtsreichste Dekarbonisierungs-Strategie weltweit. Sie ist in unterschiedlichsten Bauformen und Grössen dezentral umsetzbar, und durch die vielen Zusatznutzen auch wirtschaftlich am aussichtsreichsten.