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Sustainability 2018, 10(10), 3669; https://doi.org/10.3390/su10103669

Effect of Mechanical Pre-Treatment of the Agricultural Substrates on Yield of Biogas and Kinetics of Anaerobic Digestion

Institute of Agricultural Engineering, Wroclaw University of Environmental and Life Sciences, Wrocław 50-375, Poland
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Received: 13 July 2018 / Revised: 1 October 2018 / Accepted: 1 October 2018 / Published: 14 October 2018
(This article belongs to the Section Sustainable Agriculture, Food and Wildlife)
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Abstract

The effect of mechanical pre-treatment of nine different agricultural substrates minced to particle sizes of 1.5 mm, 5 mm and 10 mm on biogas and methane yields and fermentation kinetics was investigated. The results showed, that for five of the nine tested substrates (grass, Progas rye, Palazzo rye, tall wheatgrass, beet), a higher biogas production was obtained for the degree of fragmentation of 10 mm compared to fragmentation of 5 mm and 1.5 mm. For fragmentation of 5 mm, the highest biogas production was achieved for sorghum silage, Atletico maize and Cannavaro maize—649.80, 735.59 and 671.83 Nm3/Mg VS, respectively. However, for the degree of fragmentation of 1.5 mm, the highest biogas production (510.43 Nm3/Mg volatile solid (VS)) was obtained with Topinambur silage. The modified Gompertz model fitted well the kinetics of anaerobic digestion of substrates and show a significant dependence of the model parameters Hmax (biogas production potential) and Rmax (maximum rate of biogas production) on the degree of substrate fragmentation. View Full-Text
Keywords: agriculture substrate; mechanical fragmentation; anaerobic digestion; biogas; modeling agriculture substrate; mechanical fragmentation; anaerobic digestion; biogas; modeling
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Szlachta, J.; Prask, H.; Fugol, M.; Luberański, A. Effect of Mechanical Pre-Treatment of the Agricultural Substrates on Yield of Biogas and Kinetics of Anaerobic Digestion. Sustainability 2018, 10, 3669.

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