title: Performances of anaerobic co-digestion of fruit & vegetable waste (FVW) and food waste (FW): single-phase vs. two-phase.
abstract: The co-digestion of fruit & vegetable waste (FVW) and food waste (FW) was performed at various organic loading ratios (OLRs) in single-phase and two-phase system, respectively. The results showed that the ethanol-type fermentation dominated in both digestion processes when OLR was at low levels (<2.0 g(VS) L(-1) d(-1)). The propionic acid was rapidly accumulated as OLR was increased to higher levels (>2.0 g(VS) L(-1) d(-1)), which could cause unstable anaerobic digestion. Single-phase digestion was better than two-phase digestion in term of 4.1% increase in CH4 production at lower OLRs (<2.0 g(VS) L(-1) d(-1)). However, at higher level of OLR (≥2.0 g(VS) L(-1) d(-1)), two-phase digestion achieved higher CH4 production of 0.351-0.455 L(g VS)(-1) d(-1), which were 7.0-15.8% more than that of single-phase. Additionally, two-phase digestion presented more stable operation, and higher OLR treatment capacity. Furthermore, comparison of these two systems with bioenergy recovery revealed that two-phase system overall presented higher bioenergy yield than single-phase.
authors.affiliation: Centre for Resource and Environmental Research, Beijing University of Chemical Technology, Chaoyang District, Beijing, PR China.
authors.forename: Fei
authors.initials: F
authors.lastname: Shen
authors.forename: Hairong
authors.initials: H
authors.lastname: Yuan
authors.forename: Yunzhi
authors.initials: Y
authors.lastname: Pang
authors.forename: Shulin
authors.initials: S
authors.lastname: Chen
authors.forename: Baoning
authors.initials: B
authors.lastname: Zhu
authors.forename: Dexun
authors.initials: D
authors.lastname: Zou
authors.forename: Yanping
authors.initials: Y
authors.lastname: Liu
authors.forename: Jingwei
authors.initials: J
authors.lastname: Ma
authors.forename: Liang
authors.initials: L
authors.lastname: Yu
authors.forename: Xiujin
authors.initials: X
authors.lastname: Li
mesh_terms: D000143:Acids / Q000737:chemistry; D000693:Anaerobiosis; D001673:Biodegradation, Environmental; D056804:Biofuels / Q000032:analysis; D002245:Carbon Dioxide / Q000032:analysis; D005232:Fatty Acids, Volatile / Q000032:analysis; D005502:Food; D005638:Fruit / Q000737:chemistry*; D006859:Hydrogen / Q000032:analysis; D008697:Methane / Q000032:analysis; D009930:Organic Chemicals / Q000737:chemistry; D012037:Refuse Disposal / Q000379:methods*; D012722:Sewage; D014675:Vegetables / Q000737:chemistry*; D014866:Waste Products / Q000032:analysis*
chemical_list: D000143:Acids; D056804:Biofuels; D005232:Fatty Acids, Volatile; D009930:Organic Chemicals; D012722:Sewage; D014866:Waste Products; D002245:Carbon Dioxide; D006859:Hydrogen; D008697:Methane
keywords: Co-digestion; Food waste (FW); Fruit & vegetable waste (FVW); Single-phase; Two-phase