A pilot-scale study of granule-based anaerobic reactors for biogas recovery from municipal wastewater under sub-mesophilic conditions
| Autor: | Isaac Owusu-Agyeman, Zeynep Cetecioglu, Elzbieta Plaza |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
0106 biological sciences
Environmental Engineering Hydraulic retention time Bioengineering 010501 environmental sciences Wastewater 01 natural sciences Waste Disposal Fluid Methane chemistry.chemical_compound Bioreactors Biogas 010608 biotechnology Anaerobiosis Waste Management and Disposal Methanosaetaceae 0105 earth and related environmental sciences biology Sewage Renewable Energy Sustainability and the Environment Chemistry Granule (cell biology) General Medicine biology.organism_classification Pulp and paper industry Biofuels Methanomicrobiales Mesophile |
| Zdroj: | Bioresource technology. 337 |
| ISSN: | 1873-2976 |
| Popis: | The influence of hydraulic retention time (HRT of 3–5 h) and temperature (20–25 °C) on performance and microbial dynamics of two pilot-scale upflow anaerobic sludge blanket (UASB) reactors with different granule size distribution (UASB1 = 3–4 mm and UASB2 = 1–2 mm) were investigated for 217 days. Increasing the HRT to 5 h even at a lower temperature of 20 °C enhanced COD removal and biogas production with average of 59 ± 16% (up to 85%) and 73 ± 9 L/(m3·d) (up to 102 L/(m3·d)) for UASB1; 63 ± 16% (up to 85%) and 75 ± 9 L/(m3·d) (up to 90 L/(m3·d)) for UASB2, respectively. This is explained by sufficient contact time between microorganisms and substrate. Acetoclastic methanogenic activity was higher in UASB1 because Methanosaetaceae (produces methane from acetate) dominated (64 ± 4%). However, Methanoregulaceae (29 ± 3%) and Methanomicrobiales_unassigned (20 ± 6%) which produce methane from H2/CO2 and formate were significant in UASB2. The extent of change in the microbial dynamics with HRT and temperature was more obvious in the smaller granule reactor. |
| Databáze: | OpenAIRE |
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