**5. Conclusions**

Our results provide a unique analysis of how to utilize byproducts from *Jatropha curcas* production in the form of cake and mesocarp. We propose utilization of these byproducts for electric power plants making it an excellent source of cheap electricity and an essential element in high renewables electricity systems. We quantified all the cost and benefit components of the project and set important parameters for their calculation including a floating discount rate. Viability of this venue was calculated. All profitability indicators used in the analysis showed very promising results. *Jatropha curcas*, based on this analysis, may be a very successful crop for biogas production. It would be, however, important to also evaluate other impacts of this project in terms of its social and environmental impact by incorporation of, for example, emission allowances.

The analysis presented in the paper shows that using byproducts of *Jatropha curcas* may be profitable. For some of the processors this can be a method of diversifying their businesses to use the byproducts of *Jatropha curcas* seed production. In terms of circular economy, the proposed use of *Jatropha curcas* mesocarp and cake in electricity production is also beneficial as it provides grea<sup>t</sup> benefits and contributes to a lower waste burden. All of these features make *Jatropha curcas* a novel and interesting element in a highly renewable electricity system.

**Author Contributions:** P.P., L.S. and V.H. designed methodology; P.P., L.S. and V.H. performed the calculation and analyzed the data; P.P., L.S. and V.H. wrote the paper.

**Funding:** This research was funded by Internal Grant Agency (IGA) of Faculty of Economics and Management, CULS Prague, gran<sup>t</sup> number 2019B001.

**Conflicts of Interest:** The authors declare no conflict of interest.
