Warum im Wald Lachgas entsteht und Ökostrom produziert wird

Der Wald ist in vielen Regionen Deutschlands ein Naherholungsgebiet, aber auch ein Lieferant von Rohstoffen, die neben der herkömmlichen Verwendung, auch zu Ökostrom verarbeitet werden können. Die Ergebnisse des European Nitrogen Assessment (ENA) Gutachtens, die zu Beginn der Klimakonferenz in Schottland bekannt gegeben wurden, dürften Naturliebhabern, die den Wald als reinen Quell einer intensiven Erholung durch Waldspaziergänge sehen, nachdenklich machen. Denn „reaktiver Stickstoff“ verursacht, nach den Forschungsergebnissen des Weltklimarates Intergovernmental Panel on Climate, IPCC, in den Wäldern im gesamten europäischen Raum eine doppelt so hohe klimaschädliche Lachgasemission (N2O), als bisher angenommen. Wie sich das auf Menschen auswirkt, wurde nicht bekannt gegeben. Die Arbeitsgemeinschaft Rohholzverbraucher, AGR, eröffnet, dass mit Holz beheizte Kraftwerke nur bei einer effizienten Nutzung eine Alternative zur Atomkraft sei. Was beinhaltet die ENA-Studie?

The ENA study was prepared for the UN Commission on Air Pollution. At her had more than 200 experts from 21 countries. These are in the field of science and politics operate and work for 89 organizations. The study is the first report that points to the dangers of a too high concentration of nitrogen and the resulting environmental and economic impacts on humans, animals and plants in the pan-European region. When reading is seen as negative contribute these values ​​to climate change and loss of biodiversity. It is interesting to learn addition, the regions are particularly vulnerable in Europe and the measures to be taken to reduce the risk and protect the environment.

What is the “reactive nitrogen”?

Are mainly produced by man “reactive nitrogen” when they are metabolized by the forest to nitrous oxide. This is one of the main causes of the greenhouse effect. It is expected around 300 times more harmful than carbon dioxide. So far, the IPCC went from one percent nitrous oxide produced in this way in a forest area of ​​188 million hectares, out. The study shows that the “reactive nitrogens” has increased in 1860 compared to 2000 by 1.5 million tons. That’s two to six percent of “reactive nitrogen”, which rise from the forest floor and converted into the atmosphere in nitrous oxide. Mathematically, this is an increase of about eight kilograms per hectare of forest. The cause of the increased “reactive nitrogen compounds”, waste products are seen in the industry and conventional agriculture, which occur en masse and unmonitored into the soil or as methane gas into the air. The question arises whether the ecological agriculture, from the perspective of climate scientists can be hazardous. Professor Klaus butter-Bahl, professor at KIT is explained that the values ​​of the “reativen nitrogen” are too high and particularly those derived from ammonia emissions of conventional agriculture, must be reduced.

What experts say about wood and green energy?

The Association Rohholzverbraucher, AGR, warns in connection with the discussion of a shutdown of nuclear power plants in Germany, against a hasty expansion of renewable energy. Dr. Denny Without care, managing director of the industry association is against an undifferentiated use of wood biomass. The forester criticized that already large amounts of fresh wood is burned in biomass power plants and Bioheizwerken. Wood will now also added to the coal in coal-fired power plant. If these Terms will continue to be operated as, is a natural forest management, as practiced in Germany for decades and which must also withstand a replacement of tropical timber, no longer possible. Further questions are: Whether the German forest is still competitive. Also reflections on a groundwater remediation are important.

Entrepreneurs are suppliers of wood and green electricity

 Timber companies show how an economic use of wood and the production of green electricity in the same work can be accomplished. Examples of these companies is the company pulp Stendal, in the north, the Altmark, Saxony-Anhalt. There, each year more than 600,000 tons of pulp while 100 megawatts of electricity produced. Thus, the operator has the largest biomass power plant in Germany. This is supplied only with the costs incurred in the production process residues and produced, in addition to heat and electricity for their own use, electricity for 100,000 households regional. In 2011, in Germany there are about 250 such biomass power plants, which together have an electrical output from the current 1,200 megawatts. These six biomass cogeneration plants come with a power of about 220 megawatts.

What is the KIT and what function it?

Karlsruhe Institute of Technology (KIT) is a public university in Baden-Württemberg, with the tasks of research, teaching, innovation, and the Helmholtz Association is the national research center connected.

Source: “Nature” 472, pages 159-161, Working Group Rohholzverbraucher (AGR), Karlsruhe Institute of Technology (KIT)