In the previous edition of the oak-chestnut-leaf Linden was the method of hydrothermal Carbonation shown. This process could occur in particular for the production of Terra Preta on an industrial scale for the course.
addition to the targeted production of Terra Preta, however, also reveals a further, vast area of application in the use of special ovens for cooking in developing countries. In the present article is based on the problem, in which there are people in developing countries today, one will be presented at this issue of appropriate furnace.
need in poor, rural areas of Africa, millions of people struggle daily for survival. They are without access to clean running water and electricity. Since other fuels are not affordable, people use this wood, other plant material, and even dung to cook their food. The fires, which are used here correspond in any way the requirements for a healthy lifestyle. Often people cook on open fires in their homes. The smoke from these fires contains many simple health damaging substances that are inhaled by humans then.
why they suffer from chronic bronchitis, asthma, lung cancer or tuberculosis, leading to a reduced Lebenserwartng. Even at night, set the fires a deadly danger dar. Since the simple houses of the African population are often only one door and a gap under the roof as smoke, but have no windows, the gases collect in the room. If the residents at night at the still-warm fireplace for sleeping place, often spreading the deadly gas carbon monoxide, and people die of Kohlenmonooxidvergiftung.
die every year some 3 million children under 5 years Atemwegserkrangungen because their lungs to toxic gases may oppose the least. The toxic gases are malnutrition, disease transmission through unprotected sexual intercourse and contaminated water, the fourth largest health risk in developing countries. There
But the possibilities, the to avoid deadly smoke?
engineers in Western countries and the developing change themselves have addressed this problem and there are now many designs of ovens, which are to get at this problem and appropriate dissemination also can. Such a furnace, the Anila Stove, we have presented in this series already. The Anila Stove can also create Bioholzkohle during operation, which can then be used for the production of Terra Preta
Another example of such an oven is the "Lucia Stove". It is more complex in design, because he has turned parts and is therefore its production a suitable machinery advance. For larger quantities may be limited, the price for a furnace to about 35 €. When suitable funding calls into being, or perhaps an action that results from the Copenhagen climate change conference, so this oven in larger numbers are used.
But what is special about this stove? The Stove
Lucia consists of only a few parts. The construction of this furnace is shown in the photos shown.
components of the "Lucia Stoves" www.world-stove.de
The "Lucia Stove" www.world-stove.de
The
in the combustion of organic material such as wood, waste energy that is used by the metal walls very well. The furnace reached its high internal temperatures. In experiments, one liter of water was brought within less than a minute to cook. The high temperatures are also with the normal combustion gases produced burnt and can no longer threaten the health of the residents.
Besides the health aspect of Lucia Stove offers a view on climate change a big advantage. Not only that, the lighting material timber by the natural carbon cycle is CO2 neutral, ... it is even CO2 negative. Why?
The wood has during its growth CO2 from the atmosphere and store the carbon in their structures. Normally, this carbon again after the death of the plant are used as a CO2 into the atmosphere because the plant material is decomposed gradually from microorganisms and microbes. Even in conventional fireplaces and stoves virtually all of the carbon of the fuel is converted to CO2.
The Lucia Stove works but for a somewhat different principle. He uses namely the pyrolysis process to degas to the wood. By the two-walled structure can provide you the actual fuel with so-called primary air, the oxygen content is sufficient to the material to carbonize. The smoldering climb inside and then at the upper end of the furnace supplied by secondary air entry through the curved channels (see Figure), burned completely. The result is a nearly smokeless flame. The outgassed wood or plant material remains as Bioholzkohle in the oven. This could be distributed for the production of Terra Preta on the ground and allow the residents a high-yield cropland management. According to recent studies of growing food on Terra Preta works great even in desert regions. The Terra Preta shines especially in those regions due to their high water retention capacity.
summary There are three major advantages that speak for using Lucia Stove stoves in developing countries point out:
The smoke and the emission of harmful gases
minimizes the atmosphere, CO2 is in the form of Bioholzkohle withdrawn
The possibility of a fruitful harvest on Terra Preta to provide the residents with a greatly improved nutrition and new income opportunities
interested still a construction plan to the furnace "Anila Stove" (very similar to the "Lucia Stove 'by e-mail request from us for free.
to questions and suggestions we answer disposal on our
E-mail address: terrapreta@web.de
AG Energy and Environment working group Terra preta
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