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Abstract
This paper presents a study of the energy balance of utilising nature conservation biomass from meadow habitats in Danish biogas production. Utilisation of nature conservation grass in biogas production in Denmark represents an interesting perspective for enhancing nature conservation of the open grassland habitats, while introducing an alternative to the use of intensively cultivated energy crops as co-substrates in manure based biogas plants. The energy balance of utilising nature conservation grass was investigated by using: data collected from previous investigations on the productivity of meadow areas, different relevant geo-datasets, spatial analyses, and various statistical analyses. The results show that values for the energy return on energy invested (EROEI) ranging from 1.7 to 3.3 can be obtained when utilising meadow grasses in local biogas production. The total national net energy gain (NEG) was estimated to more than 600.000 GJ corresponding to ≈15% of the total Danish biogas production in 2012.
Originalsprog | Engelsk |
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Tidsskrift | Resources, Conservation and Recycling |
Vol/bind | 104 |
Udgave nummer | Part A |
Sider (fra-til) | 265–275 |
Antal sider | 11 |
ISSN | 0921-3449 |
DOI | |
Status | Udgivet - nov. 2015 |
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