Biogas production from greater burdock, large-leaf lupine and sosnovsky cow parsnip
2011
Dubrovskis, V., Latvia Univ. of Agriculture, Jelgava (Latvia) | Adamovics, A., Latvia Univ. of Agriculture, Jelgava (Latvia) | Plume, I., Latvia Univ. of Agriculture, Jelgava (Latvia) | Kotelenecs, V., Latvia Univ. of Agriculture, Jelgava (Latvia) | Zabarovskis, E., Latvia Univ. of Agriculture, Jelgava (Latvia)
There is a need to find acceptable crops for energy production for the climatic and soil conditions in Latvia. Greater burdock (Arctium lappa L) and large-leaf lupin (Lupinus polyphyllus L.) are growing in Latvia for years. Sosnovsky cow parsnip (Heracleum sosnowskyi Manden.) was introduced around 50 years ago as the fodder crop, but it was labelled as an invading plant spreading over 10 230 ha in Latvia in 2010. Green fresh plant biomass was investigated for biogas production in six 5 l digesters operated in batch mode at temperature 38 deg C. Average biogas yield 480 l•kgvos E-1, 520 l•kgvos E-1 or 296 l•kgvos E-1 was obtained from greater burdock, large-leaf lupin or sosnovsky cow parsnip biomass respectively. The estimated average energy potential per unit of area is 87 GJ.haE-1 or 82 GJ.haE-1 for greater burdock or large-leaf lupin biomass cultivated on not used agricultural land area respectively, and energy potential is 38 GJ.haE-1 for sosnovsky cow parsnip during its elimination period.
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