BIOENERGETIC ASSESMENT OF SWEET SORGHUM GROWN ON RECLAIMED LANDS
Journal Title: ISB-INMA TEH AGRICULTURAL AND MECHANICAL ENGINEERING - Year 2018, Vol 0, Issue 8
Abstract
Sweet sorghum varieties of domestic breeding are the priority for studying their bioenergy potential, when they cultivated on reclaimed lands. Medove is a promising cultivar for growing on such sites in areas with insufficient water supply. The energetic characteristics of sorghum were studied on four types of mining substrates: loess-like loam (LLL), red-brown clay (RBC), green-grey clay (GGC), and piled up black soil mass (BS). Under such conditions, at the plots without fertilizer, Medove produced above-ground biomass from 38 to 82 ta ha-1. The highest yield was recorded on loess-like loam. The sewage sludge application has promoted the increase of productivity by 4-44%. Although the sewage sludge introduction reduced the content of fermentable sugars in stem juice by 5.3-6.7% the theoretical ethanol yield was increased by 8- 48%, except for the plot with loess-like loam. Thermal destruction of dry biomass proceeded in a similar way on all studied substrates. Nevertheless, it was revealed that the sewage sludge application shifts the process of thermolysis into the region of lower temperatures on BS and GGC, increases the stage of lignin decomposition on LLL, and affects the rates of the reactions, as well as slightly (LLL) and significantly (BS) augments the share of the incombustible residue.
Authors and Affiliations
M. Kharytonov, N. Martynova, I. Rula, S. Sytnyk, O. Gavryushenko
Keywords
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