Performances of anaerobic co-digestion of fruit & vegetable waste (FVW) and food waste (FW): Single-phase vs. two-phase

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• 作者：Fei Shen ; Hairong Yuan ; Yunzhi Pang ; Shulin Chen ; Baoning Zhu ; Dexun Zou ; Yanping Liu ; Jingwei Ma ; Liang Yu ; Xiujin Li
• 关键词：Fruit & vegetable waste (FVW) ; Food waste (FW) ; Single-phase ; Two-phase ; Co-digestion
• 刊名：Bioresource Technology
• 出版年：2013
• 出版时间：September, 2013
• 年：2013
• 卷：144
• 期：Complete
• 页码：80-85
• 全文大小：644 K

文摘

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.