Anaerobic digestion of sunflowers and amaranths silages with catalyst metaferm
2015
Adamovics, A., Latvia Univ. of Agriculture, Jelgava (Latvia). Faculty of Agriculture. Inst. of Agrobiotechnology | Dubrovskis, V., Latvia Univ. of Agriculture, Jelgava (Latvia). Faculty of Engineering. Inst. of Agricultural Energetics
Fifty-four biogas plants are working today in Latvia. There is need to investigate the suitability of various biomasses for energy production. Maize is the dominant crop for biogas production in Latvia. The cultivation of more varied crops with good economics and low environmental impact is thus desirable. One of the ways for improving biogas yield in Latvia conditions is using biological catalysts. This paper shows results from anaerobic digestion of sunflowers and amaranths silages using new biological catalyst Metaferm. The digestion process was investigated for biogas production in sixteen 0.7 l digesters, operated in batch mode at temperature 38±1.0°C. The average methane yield per unit of dry organic matter added (DOM) from digestion of sunflower silage was 0.267 l•gDOM E-1 with Metaferm1 ml- 0.307 l•gDOM E-1 and with Metaferm 2 ml-0,434 l•gDOM E-1. Average methane yield from digestion of amaranth silage was 0,403 l•gDOM E-1 with Metaferm1 ml- 0,602 l•gDOM E-1 and with Metaferm 2 ml-0,484 l•gDOM E-1. Both investigated silages can be successfully cultivated for energy production under agro ecological conditions in Latvia. Addition of catalyst Metaferm increased methane yield.
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