Sustainable Production of Biogas in Large Bioreactor under Psychrophilic and Mesophilic Conditions
Sustainable Production of Biogas in Large Bioreactor under Psychrophilic and Mesophilic Conditions
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DOI：
10.1061/(asce)ee.1943-7870.0001645
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发表时间：
2020-03-01
影响因子：
2.2
通讯作者：
Kumar, Sudhir
中科院分区：
文献类型：
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作者：
Choudhary, Ankur;Kumar, Ashish;Kumar, Sudhir
本研究报告了一个大型连续厌氧反应器（3,000 L）的可持续性，用于从食物垃圾中生产沼气，为期324天。甲烷势范围为418.3 ~ 13.9 mL CH 4/g VS。与夏季相比，冬季沼气产量平均减少54.8%。结果表明，食物垃圾可以在低温范围（0摄氏度至15摄氏度）以及高温范围（15摄氏度至27摄氏度）内利用。总微生物群落分析揭示了代表乙酸营养型、氢营养型和甲基营养型古菌的混合聚生体（例如，甲烷八叠球菌属和甲烷八叠球菌属），表明甲烷产生的互养途径。细菌群落由变形菌门（31.3%）和拟杆菌门（14.92%）两大门组成。修正Gompertz方程和一阶方程的最大比产气量（Rm）和最大产气潜力（A）分别为134.5 mL CH 4/g VS/d和34.1 L CH 4/g VS。甲烷产量数据进行了建模，并表现出与实验结果基本一致，但是，一阶方程与实验数据的最佳协议（R2=0.99）。
This study reports the sustainability of a large semicontinuous anaerobic reactor (3,000 L) for biogas production from food wastes for a period of 324 days. The methane potential ranged from 418.3 to 13.9 mL CH4/g VSadded during the experiment. An average 54.8% reduction was observed in biogas production during the winter season compared with summer. Results showed that food wastes could be utilized in a low-temperature range (0 degrees C-15 degrees C) as well as a high-temperature range (15 degrees C-27 degrees C). The total microbial community analysis revealed mixed consortia representing acetotrophic, hydrogenotrophic, and methylotrophic archaea (e.g., Methanobacterium, Methanosarcina, and Methanospirillum), indicating a syntrophic pathway for methane production. The bacterial community was well represented by two major phyla: Proteobacteria (31.3%) and Bacteroidetes (14.92%). The highest maximum specific biogas production (Rm) and maximum biogas production potential (A) were 134.5 mL CH4/g VS/day and 34.1 L CH4/g VS for modified Gompertz and first-order equations, respectively. The methane production data were modeled, and showed substantial agreement with experimental results; however, the first-order equation had the best agreement with the experimental data (R2=0.99).