title: Effect of solid-state NaOH pretreatment on methane production from thermophilic semi-dry anaerobic digestion of rose stalk.
abstract: The effects of solid-state NaOH pretreatment on the efficiency of methane production from semi-dry anaerobic digestion of rose (Rosa rugosa) stalk were investigated at various NaOH loadings (0, 1, 2, and 4% (w/w)). Methane production, process stability and energy balance were analyzed. Results showed that solid-state NaOH pretreatment significantly improved biogas and methane yields of 30-day anaerobic digestion, with increases from 143.7 mL/g volatile solids (VS) added to 157.1 mL/g VS -192.1 mL/g VS added and from 81.8 mL/g VS added to 88.8 mL/g VS-117.7 mL/g VS added, respectively. Solid-state NaOH pretreatment resulted in anaerobic digestion with higher VS reduction and lower technical digestion time. The 4% NaOH-treated group had the highest methane yield of 117.7 mL/g VS added, which was 144% higher compared to the no NaOH-treated group, and the highest net energy recovery. Higher rate of lignocellulose breakage and higher process stability of anaerobic digestion facilitated methane production in the NaOH-pretreated groups.
authors.affiliation: School of Resource and Environment, Anhui Agricultural University, Hefei 230036, China; Key Laboratory of Biomass Improvement and Conversion of Anhui Province, School of Life Sciences, Anhui Agricultural University, Hefei 230036, China E-mail: cbj@ahau.edu.cn.
authors.forename: Yue-Gan
authors.initials: YG
authors.lastname: Liang
authors.affiliation: Key Laboratory of Biomass Improvement and Conversion of Anhui Province, School of Life Sciences, Anhui Agricultural University, Hefei 230036, China E-mail: cbj@ahau.edu.cn.
authors.forename: Beijiu
authors.initials: B
authors.lastname: Cheng
authors.affiliation: School of Resource and Environment, Anhui Agricultural University, Hefei 230036, China.
authors.forename: You-Bin
authors.initials: YB
authors.lastname: Si
authors.affiliation: School of Resource and Environment, Anhui Agricultural University, Hefei 230036, China.
authors.forename: De-Ju
authors.initials: DJ
authors.lastname: Cao
authors.affiliation: School of Resource and Environment, Anhui Agricultural University, Hefei 230036, China.
authors.forename: Dao-Lin
authors.initials: DL
authors.lastname: Li
authors.affiliation: Agricultural Environment and Resources Institute, Yunnan Academy of Agricultural Sciences, Kunming 650205, China.
authors.forename: Jian-Feng
authors.initials: JF
authors.lastname: Chen
mesh_terms: D000693:Anaerobiosis; D056804:Biofuels / Q000032:analysis*; D008697:Methane / Q000096:biosynthesis*; D018547:Plant Stems / Q000737:chemistry; D027826:Rosa / Q000737:chemistry*; D012972:Sodium Hydroxide / Q000737:chemistry*
chemical_list: D056804:Biofuels; D012972:Sodium Hydroxide; D008697:Methane