[互花米草沼渣不同TS负荷对二级厌氧消化的影响]

[Effect of TS loading rates of biogas residue of Spartina alterniflora for secondary anaerobic digestion].

作者信息

Luo Yan, Luo Xing-Zhang, Zheng Zheng, Chen Guang-Yin, Liang Yue-Gan

机构信息

State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Nanjing 210093, China.

出版信息

Huan Jing Ke Xue. 2011 Nov;32(11):3425-8.

PMID:22295645

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.

摘要

将互花米草经氢氧化钠溶液在室温下处理48小时后的沼渣用于二次厌氧消化，在（35±1）℃下总固体（TS）负荷率分别为8%、10%、12%。在厌氧消化过程中分析了沼气产量、pH值和挥发性脂肪酸（VFA）。每日产气量峰值分别为10、14、13 mL·g⁻¹，累计产气量分别为217、227、228 mL·g⁻¹。在此过程中，甲烷含量超过65%，最低pH值为7.04。乙酸浓度分别为3364、3286、5728 mg·L⁻¹，而丙酸和丁酸浓度低于1100 mg·L⁻¹。沼渣作为一种具有高沼气产率潜力的难降解有机化合物，分解缓慢，未观察到酸积累。