title: Enhancement of Biogas Yield of Poplar Leaf by High-Solid Codigestion with Swine Manure.
abstract: The aim of this work was to examine the improvement of anaerobic biodegradability of organic fractions of poplar leaf from codigestion with swine manure (SM), thus biogas yield and energy recovery. When poplar leaf was used as a sole substrate, the cumulative biogas yield was low, about 163 mL (g volatile solid (VS))(-1) after 45 days of digestion with a substrate/inoculum ratio of 2.5 and a total solid (TS) of 22 %. Under the same condition, the cumulative biogas yield of poplar leaf reached 321 mL (g VS)(-1) when SM/poplar leaf ratio was 2:5 (based on VS). The SM/poplar leaf ratio can determine C/N ratio of the cosubstrate and thus has significant influence on biogas yield. When the SM/poplar leaf ratio was 2:5, C/N ratio was calculated to be 27.02, and the biogas yield in 45 days of digestion was the highest. The semi-continuous digestion of poplar leaf was carried out with the organic loading rate of 1.25 and 1.88 g VS day(-1). The average daily biogas yield was 230.2 mL (g VS)(-1) and 208.4 mL (g VS)(-1). The composition analysis revealed that cellulose and hemicellulose contributed to the biogas production.
authors.affiliation: NUS Environment Research Institute, National University of Singapore, 5A Engineering Drive 1, Singapore, 117411, Singapore. eriliwl@nus.edu.sg.|State Key Laboratory of Multi-Phase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Zhongguancun Beiertiao 1, Beijing, 100190, People's Republic of China. eriliwl@nus.edu.sg.
authors.forename: Li
authors.initials: L
authors.lastname: Wangliang
authors.affiliation: State Key Laboratory of Multi-Phase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Zhongguancun Beiertiao 1, Beijing, 100190, People's Republic of China.
authors.forename: Zhang
authors.initials: Z
authors.lastname: Zhikai
authors.affiliation: State Key Laboratory of Multi-Phase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Zhongguancun Beiertiao 1, Beijing, 100190, People's Republic of China. gwxu@home.ipe.ac.cn.
authors.forename: Xu
authors.initials: X
authors.lastname: Guangwen
mesh_terms: D000693:Anaerobiosis; D000818:Animals; D001673:Biodegradation, Environmental; D056804:Biofuels; D001709:Biotechnology; D002482:Cellulose / Q000008:administration & dosage / Q000737:chemistry*; D004063:Digestion; D008697:Methane / Q000737:chemistry / Q000378:metabolism; D018515:Plant Leaves / Q000737:chemistry; D032107:Populus / Q000737:chemistry; D013552:Swine; D013556:Swine, Miniature
chemical_list: D056804:Biofuels; D002482:Cellulose; D008697:Methane
keywords: Anaerobic digestion; Codigestion; High solid; Swine manure; Yard waste