01. Araştırma Çıktıları | TR-Dizin | WoS | Scopus | PubMed
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Browsing 01. Araştırma Çıktıları | TR-Dizin | WoS | Scopus | PubMed by Subject "(OFMSW)"
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Article Citation - WoS: 1Citation - Scopus: 1Effect of Direct Enzyme Addition on the Anaerobic Digestion of Ofmsw(Elsevier B.V., 2024) Kabakci, Y.; Kosar, S.; Dogan, O.; Üçtuğ, Fehmi Görkem; Arikan, O.A.The organic fraction of municipal solid waste (OFMSW) has high biodegradability and is a good feedstock for anaerobic digestion (AD). However, the solubilization of OFMSW is a limiting factor for AD. In this study, enzyme treatment was investigated to increase the conversion of complex materials of OFMSW into soluble fractions. Six different concentrations (0.15, 0.3, 0.5, 1.0, 1.5 and 3.0 mg/VSadded) of the alpha amylase enzyme (obtained from Aspergillus oryzae) were directly added as a powder and automated biochemical methane potential (BMP) tests were performed under thermophilic conditions. According to BMP tests, the methane (CH4) yield increased up to 17.5 % and the lag phase decreased to 19.3 % after enzyme addition. The highest CH4 yield and shortest lag phase were obtained when 0.5 mg of enzyme/VSadded was added to the reactor. These findings suggest that direct alpha amylase enzyme application obtained from Aspergillus oryzae can be used to increase biogas production by enhancing solubilization of OFMSW for AD. © 2023 Elsevier B.V.Article Citation - WoS: 3Citation - Scopus: 4Enhancement of Methane Production by Electrohydrolysis Pretreatment for Anaerobic Digestion of Ofmsw(Academic Press Inc Elsevier Science, 2024) Kabakcı, Yağmur; Koşar, Şadiye; Doğan, Özgür; Üçtuğ, Fehmi Görkem; Arıkan, Osman AtillaHydrolysis is the most critical rate-limiting step in the anaerobic digestion (AD) process for most types of substrates. The organic fraction of municipal solid waste (OFMSW) is a rich source for the AD process because of its high degradability. In this study, electrohydrolysis pretreatment was investigated for the OFMSW to overcome the rate-limiting step of hydrolysis. Electrohydrolysis pretreatment was applied to the OFMSW for 30 and 60 min in a custom-made reactor. In the untreated, 30-min. treated, and 60-min. treated OFMSW average methane production was observed as 225 +/- 2 mL CH4/g VSadded, 231 +/- 4 mL CH4/g VSadded, and 248 +/- 7 mL CH4/g VSadded, respectively. By increasing the treatment time, the lag phase, during which hydrolysis occurs, was reduced by 40-43%. 3-10% more methane was produced by applying electrohydrolysis pretreatment. These results suggest that electrohydrolysis pretreatment is a promising method to improve the efficiency of AD for the OFMSW by reducing the time required for hydrolysis and increasing methane production. More investigation is required to better comprehend the effects of electrohydrolysis on the OFMSW.