title: Batch and semi-continuous anaerobic digestion of food waste in a dual solid-liquid system.
abstract: To avoid the inhibition from both of waste oil and high concentrations of cationic elements, anaerobic digestion of food waste in a dual solid-liquid (ADSL) system was examined in this present paper. Results from batch test indicated that a higher methane yield could be obtained in the ADSL system. The methane yield of food solid waste (FSW), food liquid waste (FLW) and raw food waste (RFW) were 643, 659 and 581 mL/g-VS, respectively. In semi-continuous anaerobic digestion, the optimum organic loading rates (OLR) for FSW, FLW and RFW were 9, 4 and 7 g-VS/L/d, respectively. The total methane production of RFW and ADSL systems, based on 1 kg-VS(RFW), were 405 and 460 L, respectively, indicating that the methane production increased by 13.6% in the ADSL system. The optimum C/N ratio, redistribution of metal element and lower content of waste oil in FSW explain the higher methane production.
authors.affiliation: Beijing Key Laboratory of Bioprocess Laboratory, Beijing University of Chemical Technology, Beijing 100029, PR China.
authors.forename: Cunsheng
authors.initials: C
authors.lastname: Zhang
authors.forename: Haijia
authors.initials: H
authors.lastname: Su
authors.forename: Tianwei
authors.initials: T
authors.lastname: Tan
mesh_terms: D001421:Bacteria, Anaerobic / Q000378:metabolism*; D002244:Carbon / Q000378:metabolism; D002849:Chromatography, Gas; D005232:Fatty Acids, Volatile / Q000378:metabolism; D005502:Food; D008697:Methane / Q000096:biosynthesis*; D012037:Refuse Disposal / Q000379:methods*; D013997:Time Factors; D014866:Waste Products
chemical_list: D005232:Fatty Acids, Volatile; D014866:Waste Products; D002244:Carbon; D008697:Methane
keywords: Anaerobic digestion; Biogas; Food waste; Methane; Waste oil