Improving the Energetic Efficiency of Biogas Plants Using Enzymatic Additives to Anaerobic Digestion

Małgorzata Fugol, Hubert Prask, Józef Szlachta, Arkadiusz Dyjakon (), Marta Pasławska and Szymon Szufa
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Małgorzata Fugol: Institute of Agricultural Engineering, Wroclaw University of Environmental and Life Sciences, Chelmonskiego 37a, 51-630 Wroclaw, Poland
Hubert Prask: Institute of Agricultural Engineering, Wroclaw University of Environmental and Life Sciences, Chelmonskiego 37a, 51-630 Wroclaw, Poland
Józef Szlachta: Institute of Agricultural Engineering, Wroclaw University of Environmental and Life Sciences, Chelmonskiego 37a, 51-630 Wroclaw, Poland
Arkadiusz Dyjakon: Department of Applied Bioeconomy, Wroclaw University of Environmental and Life Sciences, Chelmonskiego 37a, 51-630 Wroclaw, Poland
Marta Pasławska: Institute of Agricultural Engineering, Wroclaw University of Environmental and Life Sciences, Chelmonskiego 37a, 51-630 Wroclaw, Poland
Szymon Szufa: Faculty of Process and Environmental Engineering, Lodz University of Technology, Wolczanska 213, 90-924 Lodz, Poland

Energies, 2023, vol. 16, issue 4, 1-12

Abstract: This study was carried out to estimate the relevance of biological supplementation in improving the economic efficiency of anaerobic digestion (AD). Three kinds of silages—maize, grass, and igniscum—were initially inoculated with digestate and then supplemented with one of four vaccines containing different bacteria species (APD ® , PPT ® , JENOR ® ) or a yeast and mold mixture (HAP ® ). In addition, each plant silage was fermented without any additives (control A—maize silage, B—grass silage, and C—igniscum silage). The biodegradability process was performed in batch tests at a mesophilic temperature (38 °C). To compare the energetic efficiency of AD, the process kinetics, biogas, and methane production were analyzed. We found that the applied supplementation measures improved biogas production in the case of maize and igniscum (7–62% higher than controls), but decreased the yield of AD when grass silage was fermented (2–34% lower than controls). The greatest increase in methane production (by 79%) was observed when maize silage was digested with the PPT ® pretreatment, with 427 Nm 3 ?Mg ?1 VS (volatile solids).

Keywords: anaerobic digestion; biogas additives; biogas production; energy efficiency (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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