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| | [[Biogas|►]][[Portal:Biogas|Back to Biogas Portal]] | | [[Biogas|►]][[Portal:Biogas|Back to Biogas Portal]] |
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| − | = Introduction =
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| − | For producing biogas from the animals´dung and urine , following points are to be taken into consideration: | + | = Overview = |
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| | + | For producing biogas from the animals´dung and urine, the following points are to be taken into consideration: |
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| | + | *[[Siting of the Biogas Unit#Construction of the Stable|Construction of the stable]] |
| | + | *[[Siting of the Biogas Unit#Characteristics of the Stable|Caracteristics of the stable]] |
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| | = Construction of the Stable = | | = Construction of the Stable = |
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| | {| cellpadding="0" border="0" align="center" style="width: 300px" class="IMGright FCK__ShowTableBorders" | | {| cellpadding="0" border="0" align="center" style="width: 300px" class="IMGright FCK__ShowTableBorders" |
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| − | | [[File:Siting1.jpg|300px|Siting1.jpg]] | + | | [[File:Siting1.jpg|300px|Siting1.jpg|alt=Siting1.jpg]] |
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| | '''Fig: A digester should be as close as possible to the source of dung'''<ref name="Photo: Krämer (TBW)">Photo: Krämer (TBW)</ref> | | '''Fig: A digester should be as close as possible to the source of dung'''<ref name="Photo: Krämer (TBW)">Photo: Krämer (TBW)</ref> |
| − | | [[File:Siting2.jpg|right|345px|Siting2.jpg]]
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| | + | | [[File:Siting2.jpg|right|345px|Siting2.jpg|alt=Siting2.jpg]] |
| | '''Fig: Cowshed, directly connected to the plant: A urine chamber to the right collects the liquid which can be used to wash the dung into the digester.'''<ref name="Photo: Kellner (TBW)">Photo: Kellner (TBW)</ref> | | '''Fig: Cowshed, directly connected to the plant: A urine chamber to the right collects the liquid which can be used to wash the dung into the digester.'''<ref name="Photo: Kellner (TBW)">Photo: Kellner (TBW)</ref> |
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| | |} | | |} |
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| − | == Characteristics of the Stable ==
| + | = Characteristics of the Stable = |
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| | *A golden rule is: the plant belongs to the stable rather than to the kitchen. Preferably, the mixing chamber and inlet are directly connected to a concrete stable floor. A few meters of piping are more economic than the daily transport of dung from the stable to the biogas plant. | | *A golden rule is: the plant belongs to the stable rather than to the kitchen. Preferably, the mixing chamber and inlet are directly connected to a concrete stable floor. A few meters of piping are more economic than the daily transport of dung from the stable to the biogas plant. |
| | *The roof of the stable should neither drain on the digester nor on the soil covering the plant. Large amounts of water entering the ground around the plant weaken the soil and cause static instability. Excess rain water may cool down the slurry in the plant and cause the gas production to drop. | | *The roof of the stable should neither drain on the digester nor on the soil covering the plant. Large amounts of water entering the ground around the plant weaken the soil and cause static instability. Excess rain water may cool down the slurry in the plant and cause the gas production to drop. |
| | *The overflow point should guide into farmland owned by the plant user. It has been observed that plants which overflow on public or foreign land can cause social problems. A promise of the owner to remove the slurry daily should not convince the planner. | | *The overflow point should guide into farmland owned by the plant user. It has been observed that plants which overflow on public or foreign land can cause social problems. A promise of the owner to remove the slurry daily should not convince the planner. |
| − | *[[Piping_Systems_for_Biogas_Plants#Water_Traps|Water traps]] in the piping are a constant source of trouble. If the site allows, the plant and its piping should be laid out in a way that a water trap in the piping can be avoided. This is only possible if the pipes are sloping all the way back to the plant. | + | *[[Piping Systems for Biogas Plants#Water Traps|Water traps]] in the piping are a constant source of trouble. If the site allows, the plant and its piping should be laid out in a way that a water trap in the piping can be avoided. This is only possible if the pipes are sloping all the way back to the plant. |
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| − | *The [[Piping_Systems_for_Biogas_Plants|piping]] is a major cost factor. It should not be unnecessarily long. This criterion, however, is given less priority than having the stable close to the inlet and the outlet directed towards the farm land. | + | *The [[Piping Systems for Biogas Plants|piping]] is a major cost factor. It should not be unnecessarily long. This criterion, however, is given less priority than having the stable close to the inlet and the outlet directed towards the farm land. |
| | *A fixed dome plant should not be located in an area required for tractor or heavy machinery movements. | | *A fixed dome plant should not be located in an area required for tractor or heavy machinery movements. |
| | *Trees should not be too close to the plant. The roots may destroy the digester or the expansion chamber. In addition older trees may fall and destroy parts of the plant. If the position of the biogas plant is too shady, the soil temperature around the plant will be low in general. This leads to a decrease in gas production. | | *Trees should not be too close to the plant. The roots may destroy the digester or the expansion chamber. In addition older trees may fall and destroy parts of the plant. If the position of the biogas plant is too shady, the soil temperature around the plant will be low in general. This leads to a decrease in gas production. |
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| − | [[File:Sitingmodel.jpg|border|292px]] | + | [[File:Sitingmodel.jpg|border|292px|alt=Sitingmodel.jpg]] |
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| | '''Fig:A model of an agricultural digester in Germany with two horizontal steel tanks, a gas storage bag and a co-generation unit in a container'''<ref name="Photo: Krämer (TBW)">Photo: Krämer (TBW)</ref> | | '''Fig:A model of an agricultural digester in Germany with two horizontal steel tanks, a gas storage bag and a co-generation unit in a container'''<ref name="Photo: Krämer (TBW)">Photo: Krämer (TBW)</ref> |
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| | |} | | |} |
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| | + | = Further Information = |
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| | + | *[[Portal:Biogas|Biogas Portal on energypedia]] |
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| | = References<br/> = | | = References<br/> = |
For producing biogas from the animals´dung and urine, the following points are to be taken into consideration:
