CEREALS AS ENERGY SOURCES IN THE FUNCTION OF CIRCULAR ECONOMY.

The circular economy is an approach that integrates the economy, the waste management system and protects the environment. The goal of the circular economy is to optimize the existing system and increase welfare. The growth trend of alternative fuels is evident in the world from year to year, thanks to the development of new technologies for processing biological waste into energy sources. Commercial production needs to be economically and environmentally friendly so that biofuels from renewable sources are an adequate substitute for fossil fuels. In this study, two winter grains, wheat and rye, were examined, during 2018/2019 and 2019/2020, in order to obtain biogas from plant biomass. The results showed that wheat had a statistically significantly higher production of biomass and biogas compared to rye. Based on the analysis of variance, it can be concluded that there are highly significant differences in biomass yield in regard to the genotype (Fexp=937.75**) and years (Fexp=28.07**) of investigation. There is a strong positive correlation between biomass and biogas yields. [ABSTRACT FROM AUTHOR]