20.500.12556/DKUM-87354-68d4b461-c684-85ab-4176-8e6847bbd065 Improvement of biogas production utilizing a complex anaerobic digestion model and gradient-based optimization Anaerobic digestion (AD) is a promising technology for renewable energy production from organic waste. In order to maximize the produced biogas quantity and quality, this paper deals with the optimization of the AD process in a CSTR bioreactor of a full-scale biogas plant. For this purpose, a novel approach was adopted coupling, a highly complex BioModel for AD simulation, and a gradient-based optimization method. In order to improve AD performance, the dosages of various types of biological additives, the dosages of inorganic additives, and the temperature in the bioreactor were optimized in three different scenarios. The best biogas quality was obtained using multi-objective optimization, where the objective function involves the following two conflicting objectives: the maximization of biogas production and minimization of the needed heating energy. The obtained results show that, potentially, the content of CH4 can be increased by 11%, while the contents of H2, H2S, and NH3 can be reduced by 30%, 20%, and 81% when comparing the simulation results with the experimental data. The obtained results confirm the usefulness of the proposed approach, which can easily be adapted or upgraded for other bioreactor types. additives anaerobic digestion approximation method BioModel complex substrate gradient-based optimization process conditions dodatki anaerobna razgradnja metoda približevanja kompleksen substrat optimizacija na podlagi gradienta procesni pogoji true false true MDPI https://www.mdpi.com/journal/energies Angleški jezik Slovenski jezik © 2024 by the authors Članek v reviji 2024-03-12 11:18:03 2024-03-12 11:18:04 2025-07-23 03:11:04 0000-00-00 00:00:00 2024 0 0 17 str. št. 6, št. članka 1279 let. 17 March 2024 0000-00-00 Zaloznikova Objavljeno NiDoloceno 2024-02-14 2024-03-05 2024-03-07 620.92/.98:66.02 188083715 10.3390/en17061279 1996-1073 energies-17-01279.pdf energies-17-01279.pdf 1 12ED83590BFAD68B246653C8F609FFF7 6a0e2ea1427bac342b0bad55669c4f7617b5fbb7f15c883f0bacb2745aa03d14 5c42f319-66e2-11f0-b4a7-00155d000105 https://dk.um.si/Dokument.php?lang=slv&id=193930 https://www.mdpi.com/1996-1073/17/6/1279 0 ec3b4e8d-e059-11ee-97ea-00155d000105 https://dk.um.si/Dokument.php?lang=slv&id=176802 Fakulteta za strojništvo 0 0 0