title: [Effect of NaOH-treatment on advanced anaerobic biogasification of Spartina alterniflora].
abstract: In order to improve the biotransformation rate of Sparnina alterniflora, effect of NaOH-treatment on anaerobic dry-mesophilic digestion of Spartina alterniflora and feasibility of NaOH-treatment as a pretreatment of biogas residues of Spartina alterniflora for advanced anaerobic biogasification were conducted under lab-scale conditions. The results indicated that there was less improvement to biogas yield with NaOH-treatment and the cumulative biogas yield of Spartina alterniflora was 358.94 mL/g TS which was 92.42% to that of control (CK). However, the average methane content was improved slightly with 1.84% improvement. After solid-state pretreatment with 5% NaOH solution for 48 h, the biogas residue of Spartina alterniflora was used for advanced biogasification. This experiment was conducted under 35 degrees C +/- 1 degrees C with initial total solid loading of 8%. The cumulative biogas yield was 209.73 mL/g TS with 70.78% of average methane content, but the biotransformation rate was only 23.29% which was much lower than that of Spartina alterniflora. The fermentation type was propionic acid type fermentation. After two-phase fermentation treatment, cellulose content was decreased significantly while lignin and hemicellulose content were increased. The crystalinity of cellulose of biogas residue decreased after two-phase anaerobic fermentation which was consistent to result of FTIR. The comprehensive analysis of experiment indicated that biogas residue of Spartina alterniflora was still a good material for biogas production and NaOH-treatment was a good pretreatment for biogas production.
authors.affiliation: Jiangsu Agricultural Waste Treatment and Recycle Engineering Research Center, Institute of Agricultural Resources and Environment, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China. chengy522@gmail.com
authors.forename: Guang-Yin
authors.initials: GY
authors.lastname: Chen
authors.forename: Zheng
authors.initials: Z
authors.lastname: Zheng
authors.forename: Zhi-Zhou
authors.initials: ZZ
authors.lastname: Chang
authors.forename: Xiao-Mei
authors.initials: XM
authors.lastname: Ye
mesh_terms: D000693:Anaerobiosis; D001673:Biodegradation, Environmental; D056804:Biofuels / Q000032:analysis*; D002482:Cellulose / Q000378:metabolism*; D005285:Fermentation; D008697:Methane / Q000032:analysis / Q000378:metabolism; D006109:Poaceae / Q000737:chemistry* / Q000254:growth & development; D012972:Sodium Hydroxide / Q000737:chemistry*
chemical_list: D056804:Biofuels; D012972:Sodium Hydroxide; D002482:Cellulose; D008697:Methane