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231223s2009 xx |||||o 00| ||eng c |
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|a 10.2166/wst.2009.048
|2 doi
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|a eng
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|a Salter, A
|e verfasserin
|4 aut
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|a Establishing an energy balance for crop-based digestion
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|c 2009
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
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|2 rdamedia
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|a ƒa Online-Ressource
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|a Date Completed 15.06.2009
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|a Date Revised 03.04.2009
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|a published: Print
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|a Citation Status MEDLINE
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|a The paper examines methods for calculating energy surpluses through anaerobic digestion and gives some examples of the practical application of these in crop-based systems. The surplus energy is the balance between that produced as a usable energy source and that used in crop production, conversion of the biomass into biogas, and conversion of biogas into a usable form: these are the direct energy inputs. The energy balance also takes into account the embedded energy used in the construction of machinery and buildings and for their repair and maintenance: the indirect energy inputs. The area of land available for fuel production is finite and therefore the energy yield is best considered on a per hectare basis. This allows comparison of energy conversion efficiency where the biomass yield for that area may vary depending on a range of inputs, e.g. rate of fertiliser application or irrigation requirements. It also allows direct comparison between different crop species or varieties within a single species. For an accurate energy balance analysis direct and indirect energy requirements have to be established for all the stages in the crop-based energy production cycle
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|a Journal Article
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|a Banks, C J
|e verfasserin
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|i Enthalten in
|t Water science and technology : a journal of the International Association on Water Pollution Research
|d 1986
|g 59(2009), 6 vom: 01., Seite 1053-60
|w (DE-627)NLM098149431
|x 0273-1223
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|g volume:59
|g year:2009
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|g pages:1053-60
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|u http://dx.doi.org/10.2166/wst.2009.048
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