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Effect of different organic loads on the performance and microbial community mechanism of dry anaerobic digestion

文献类型：期刊论文

作者Zhen, Feng1,2; Wu, Di3; Sun, Yongming1; Qu, Bin4; Li, Lianhua1,2; Li, Ying1,2; Li, Qichen5; Xing, Tao1,2
刊名FUEL
出版日期2024-04-01
卷号361页码:11
关键词Corn straw Dry anaerobic digestion Microbial community Methane metabolic pathways
ISSN号0016-2361
DOI10.1016/j.fuel.2023.130615
通讯作者Xing, Tao(13580582341@139.com)
英文摘要In this study, the vertical continuous push-flow dry anaerobic digestion (AD) reactor was developed independently. Typical agricultural organic waste straw and cow dung were used as raw materials in this paper to carry out long-term continuous mixed dry AD experiments on a controlled laboratory scale. The experimental results showed that the system was in low-stress operation at an organic load rate (OLR) of 3 g VS L-1 d(-1), the VS methane production rate was located at 225 similar to 272 mL CH4 g VS-1, and the volumetric methane production rate was located at 0.95 +/- 0.08 L (Ld)(-1), and the combination of the volumetric methane production rate, VS methane production rate, methane content of the gas, and the VS removal rate showed that the system's operational performance in this stage was in the best condition in the whole set of experiments. When the OLR reached 25 g VS L-1 d(-1), the content of VFAs all began to climb rapidly above 8000 mg/L, with the content of acetic acid increasing most significantly due to the fact that the activity of acetic acid-type methanogenic bacteria was the first to be inhibited. Eventually, because of the kinetic differences between the hydrolytic acidifying bacteria and the methanogenic archaea, the final acidification destabilisation of the anaerobic digestion reactor occurred and the system was irreversibly destabilised. The system performance at this stage was in the best condition in the whole set of experiments. The study of microbial community succession and metabolic mechanisms showed that Methanoculleus and Methanobacterium play a key role in sustaining methane production, and the increased abundance and dominance of hydrogen methanogens implies that methane is produced via the hydrogen methanogenic pathway under high organic loading conditions.
WOS关键词METHANE PRODUCTION ; PRETREATMENT ; HYDROGEN ; STRAW ; WASTE
资助项目Key R & D Project of Heilongjiang Province[GY2021ZB0253/GA21D009] ; National Natural Science Foundation of China[52170143] ; Technological Project of Heilongjiang Province[2022ZXJ05C01] ; Natural Science Foundation of Chongqing[CSTB2023NSCQBHX0171] ; Key research and development program of Guangzhou[2023B03J1229]
WOS研究方向Energy & Fuels ; Engineering
语种英语
WOS记录号WOS:001148054800001
出版者ELSEVIER SCI LTD
资助机构Key R & D Project of Heilongjiang Province ; National Natural Science Foundation of China ; Technological Project of Heilongjiang Province ; Natural Science Foundation of Chongqing ; Key research and development program of Guangzhou
源URL[http://ir.giec.ac.cn/handle/344007/40747]  
专题中国科学院广州能源研究所
通讯作者Xing, Tao
作者单位1.Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou 510640, Peoples R China
2.Guangdong Prov Key Lab New & Renewable Energy Res, Guangzhou 510640, Peoples R China
3.Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Chongqing 400714, Peoples R China
4.Northeast Agr Univ, Coll Arts & Sci, Harbin 150030, Peoples R China
5.Chinese Acad Agr Sci, Inst Environm & Sustainable Dev Agr, Beijing 100081, Peoples R China
推荐引用方式
GB/T 7714		 Zhen, Feng,Wu, Di,Sun, Yongming,et al. Effect of different organic loads on the performance and microbial community mechanism of dry anaerobic digestion[J]. FUEL,2024,361:11.
APA Zhen, Feng.,Wu, Di.,Sun, Yongming.,Qu, Bin.,Li, Lianhua.,...&Xing, Tao.(2024).Effect of different organic loads on the performance and microbial community mechanism of dry anaerobic digestion.FUEL,361,11.
MLA Zhen, Feng,et al."Effect of different organic loads on the performance and microbial community mechanism of dry anaerobic digestion".FUEL 361(2024):11.

入库方式： OAI收割

来源：广州能源研究所

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