title: [Effect of TS loading rates of biogas residue of Spartina alterniflora for secondary anaerobic digestion].
abstract: Biogas residue of Spartina alterniflora treated by NaOH solution for 48h at room temperature was used for secondary anaerobic digestion with TS loading rates were 8%, 10%, 12% at (35 +/- 1) degrees C. The biogas yield, pH, and volatile fatty acid (VFA) were analyzed during the anaerobic digestion. The peak of daily gas production were 10, 14, 13 mL x g(-1) and the rates of cumulate gas production were 217, 227, 228 mL x g(-1) respectively. The methane content exceeded 65% and the lowest pH value was 7.04 during the process. The concentrations of acetic acid concentrations were 3 364, 3 286, 5 728 mg x L(-1) respectively while propionic acid and butyric acid concentrations were below 1 100 mg x L(-1). Biogas residue as a non-degradation organic compound with high potential biogas yield was decomposed slowly and no acid accumulation was not observed.
authors.affiliation: State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Nanjing 210093, China. lyyfeixiang@163.com
authors.forename: Yan
authors.initials: Y
authors.lastname: Luo
authors.forename: Xing-Zhang
authors.initials: XZ
authors.lastname: Luo
authors.forename: Zheng
authors.initials: Z
authors.lastname: Zheng
authors.forename: Guang-Yin
authors.initials: GY
authors.lastname: Chen
authors.forename: Yue-Gan
authors.initials: YG
authors.lastname: Liang
mesh_terms: D000693:Anaerobiosis; D001421:Bacteria, Anaerobic / Q000378:metabolism*; D001673:Biodegradation, Environmental; D056804:Biofuels / Q000032:analysis*; D005285:Fermentation; D006109:Poaceae / Q000378:metabolism*; D012972:Sodium Hydroxide / Q000737:chemistry
chemical_list: D056804:Biofuels; D012972:Sodium Hydroxide