In the invited keynote lecture at the international congress in USA, a multicriteria optimization approach was presented for designing biofuel processes from renewable sources, considering simultaneously economic and environmental indicators. This approach is based on the mathematical programming approach, which enables to solve complex renewable supply chains and networks to optimality. The LCA was included in order to generate profitable and environmentally friendly solutions. The approach was applied to biogas and bioethanol case studies, giving very promising results.
B.04 Guest lectureCOBISS.SI-ID: 14866198
The optimum fermentation conditions were determined experimentally in order to increase biogas production and the fraction of methane in biogas. Laboratory experiments confirmed that the optimal duration of fungal growth over the plants is 14 days. The inoculum has to be homogeneous, fluent, and bacteria-rich. Optimum ratio between the inoculum and the substrate is 50:50. A buffer solution should be used for diluting rather than water in order to maintain a constant pH value. Periodic mixing ensures the sufficient contact time for bacterial fermentation of substrates.
F.02 Acquisition of new scientific knowledgeCOBISS.SI-ID: 14885398
This report presents the study about the influence of poultry manure and fast-growing plants mixture on the growth of white rot fungi mycelium (Trametes versicolor and Pleurotus ostreatus) and influence of the mixtures on the biogas production. It contains also original method for measurement of laboratory biogas production, developed in our lab and corresponding optimal conditions for anaerobic digestion.
F.02 Acquisition of new scientific knowledgeCOBISS.SI-ID: 1901961
Optimization model was developed for designing heat integrated biogas processes, which involves also the synthesis of heat exchanger network. Model was applied to a biogas process which utilizes poultry manure and slaughterhouse wastes. Optimum solution has good economic and environmental characteristics. It involves the selection of input substrates, fermentation operating conditions, fresh water usage, building of new production capacities, and optimal matches between heat sources and consumers including cogeneration of heat and electricity from biogas.
F.09 Development of a new technological process or technologyCOBISS.SI-ID: 14904086
This contribution presents an optimization approach to sustainable system synthesis. A two-step multi-objective mixed-integer nonlinear programming synthesis is described, where a single-criterion is performed during the first step in order to obtain economically-efficient solutions, and multi-criteria during the second step in order to achieve sustainable solutions. Several example problems (bio-process networks, municipal solid waste networks, and regional renewable supply and demand networks) indicate that more profitable and yet less environmentally-harmful systems can be obtained.
F.23 Development of new system-wide, normative and programme solutions, and methodsCOBISS.SI-ID: 14359062