Rapid establishment of thermophilic anaerobic microbial community during the one-step startup of thermophilic anaerobic digestion from a mesophilic digester
| Autor: | Yu You Li, Min Yang, Yu Zhang, Yong-Zhi Chi, Zhe Tian |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Environmental Engineering
Methanothermobacter Microbiology Bioreactors Mesophilic digester Anaerobiosis Food science Waste Management and Disposal Water Science and Technology Civil and Structural Engineering Bacteria biology Chemistry Microbiota Ecological Modeling Thermophile Methanosarcina thermophila Temperature biology.organism_classification Archaea Pollution Refuse Disposal Anaerobic digestion Methanoculleus Anaerobic exercise Sludge |
| Zdroj: | Water Research. 69:9-19 |
| ISSN: | 0043-1354 |
| DOI: | 10.1016/j.watres.2014.11.001 |
| Popis: | The purpose of this study was to explore how fast the thermophilic anaerobic microbial community could be established during the one-step startup of thermophilic anaerobic digestion from a mesophilic digester. Stable thermophilic anaerobic digestion was achieved within 20 days from a mesophilic digester treating sewage sludge by adopting the one-step startup strategy. The succession of archaeal and bacterial populations over a period of 60 days after the temperature increment was followed by using 454-pyrosequencing and quantitative PCR. After the increase of temperature, thermophilic methanogenic community was established within 11 days, which was characterized by the fast colonization of Methanosarcina thermophila and two hydrogenotrophic methanogens (Methanothermobacter spp. and Methanoculleus spp.). At the same time, the bacterial community was dominated by Fervidobacterium, whose relative abundance rapidly increased from 0 to 28.52 % in 18 days, followed by other potential thermophilic genera, such as Clostridium, Coprothermobacter, Anaerobaculum and EM3. The above result demonstrated that the one-step startup strategy could allow the rapid establishment of the thermophilic anaerobic microbial community. |
| Databáze: | OpenAIRE |
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