ISSN 2285-5785, ISSN CD-ROM 2285-5793, ISSN ONLINE 2285-5807, ISSN-L 2285-5785
 

SPECIES OF PERENNIAL GRASSES AS FEEDSTOCK FOR BIOGAS PRODUCTION IN THE REPUBLIC OF MOLDOVA

Published in Scientific Papers. Series A. Agronomy, Vol. LIX
Written by Victor ŢÎŢEI

The increasing world population, growing energy consumption, greenhouse gas emission and diminishing supplies of fossil fuels obligate to look for alternative ways, development of new technological processes of energy production. The selection of the appropriate plant species as feedstock for biogas production is an important aspect in decision-making. We investigated some agro-biological peculiarities and biochemical composition of biomass of native perennial grasses Dactylis glomerata, Festuca arundinacea and introduced Agropyron desertorum, Agropyron sibiricum, Miscanthus giganteus, Miscanthus sinensis cultivated on the experimental land of the Botanical Garden (Institute) of the Academy of Sciences of Moldova. The studied species differ in the pace of growth and development, productivity and chemical composition of the harvested mass. The gas forming potential of the fermentable organic matter of biomass varied from 328 to 479 liter/kg volatile solids. The best results were achieved for Dactylis glomerata and Miscanthus sinensis with methane production yield of 248-252 liter/kg volatile solids, likely higher content of nitrogen-free extract. The calculated methane yield per ha for native perennial grasses ranged from 2077 to 2243 m3/ha, and from 1386 to 1605 m3/ha – Agropyron species, while from 3348 to 4128 m3/ha for Miscanthus sinensis and Miscanthus giganteus.

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