20.500.12556/RUL-163510 Co-digestion of wastewater sludge with food waste and green cuttings optimization of methane production Kodigestija blata iz čistilne naprave z odpadno hrano in zelenim odrezom optimizacija proizvodnje metana This article outlines our investigation into the methane production of wastewater sludge (WWS) from a wastewater treatment plant (WWTP) and a mixture of WWS with food waste (FW) and green cutting (GC). To determine the optimal mixture, two methane potential experiments were performed using the Automatic Methane Potential Test System (AMPTS II). In the first experiment, WWS and FW were used. The highest methane potential was measured in FW, and the lowest in WWS. The combination of both substrates did not approach the methane potential of FW (241.5 ± 15.7 mL CH4/g VS). In second experiment, we combined WWS and GC. The highest methane potential was obtained at 5.1% addition of GC to the WWS (relative to the organic load). This methane potential was 7.5% higher than the methane potential of WWS, which was 470 ± 17 mL CH4/g VS. We calculated the optimal mixture of both experiments using the simplex lattice design method. In experiment one, the model had relatively good fit to the measured values, however in the second experiment the differences were significant V članku smo raziskovali proizvodnjo metana blata iz čistilne naprave (ČN) in mešanice blata z odpadno hrano in zelenim odrezom. Da bi določili optimalno mešanico, smo izvedli dva eksperimenta metanskih potencialov z uporabo Automatic Methane Potential Test System (AMPTS II). V prvem eksperimentu, kjer smo uporabili blato iz ČN ter odpadno hrano, smo največji metanski potencial izmerili pri odpadni hrani, najmanjšega pa pri blatu iz ČN. Kombinacija obeh substratov metanskega potenciala ni poslabšala, ampak se je približala metanskemu potencialu odpadne hrane (241,5 ± 15,7 mL CH4/g VS). V drugem eksperimentu smo kombinirali blato in zeleni odrez. Največji metanski potencial smo dobili pri 5,1% dodajanju zelenega odreza k blatu (glede na organsko obremenitev). Ta metanski potencial je bil večji za 7,5% od metanskega potenciala blata iz ČN, ki je znašal 470 ± 17 mL CH4/g VS. Z metodo simplex lattice design smo preverili optimalno mešanico obeh eksperimentov. Pri prvem eksperimentu se je model približal izmerjenim vrednostim, pri drugem pa so bile razlike velike. anaerobic digestion methane potential wastewater sludge green cutting food waste anaerobna presnova metanski potencial blato zeleni odrez odpadna hrana true false true Angleški jezik Slovenski jezik Članek v reviji 2024-10-08 09:55:49 2024-10-08 09:55:55 2024-10-22 10:14:12 0000-00-00 00:00:00 2022 0 0 Str. 75-88 št. 63 Letn. 35 2022 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 628.336.5:66.098.4(497.4) 0352-3551 10.15292/acta.hydro.2022.06 152608771 RAZ_Kolbl_Repinc_Sabina_2022.pdf RAZ_Kolbl_Repinc_Sabina_2022.pdf 1 4D5F512B9B9A614F1F3F9E85B59C7C7A e9a28f53ba9a74ce7a0e677250aae6bed787ff91c0a4fddbcc5a272e53a48f58 92a21548-854a-11ef-b232-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=193250 https://actahydrotechnica.fgg.uni-lj.si/si/paper/a35skr 0 c843abb6-854a-11ef-b232-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=193251 Fakulteta za gradbeništvo in geodezijo 0 0 0