Water research (Oxford), 2012-11, Vol.46 (17), p.5756-5764
2012
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- Autor(en) / Beteiligte
- Titel
- Anaerobic treatment of municipal wastewater at ambient temperature: Analysis of archaeal community structure and recovery of dissolved methane
- Ist Teil von
- Water research (Oxford), 2012-11, Vol.46 (17), p.5756-5764
- Ort / Verlag
- Kidlington: Elsevier Ltd
- Erscheinungsjahr
- 2012
- Quelle
- MEDLINE
- Beschreibungen/Notizen
- Anaerobic treatment is an attractive option for the biological treatment of municipal wastewater. In this study, municipal wastewater was anaerobically treated with a bench-scale upflow anaerobic sludge blanket (UASB) reactor at temperatures from 6 to 31 °C for 18 months to investigate total chemical oxygen demand (COD) removal efficiency, archaeal community structure, and dissolved methane (D-CH4) recovery efficiency. The COD removal efficiency was more than 50% in summer and below 40% in winter with no evolution of biogas. Analysis of the archaeal community structures of the granular sludge from the UASB using 16S rRNA gene-cloning indicated that after microorganisms had adapted to low temperatures, the archaeal community had a lower diversity and the relative abundance of acetoclastic methanogens decreased together with an increase in hydrogenotrophic methanogens. D-CH4, which was detected in the UASB effluent throughout the operation, could be collected with a degassing membrane. The ratio of the collection to recovery rates was 60% in summer and 100% in winter. For anaerobic treatment of municipal wastewater at lower temperatures, hydrogenotrophic methanogens play an important role in COD removal and D-CH4 can be collected to reduce greenhouse gas emissions and avoid wastage of energy resources. [Display omitted] ► Municipal wastewater was anaerobically treated at ambient temperature. ► Hydrogenotrophic methanogens were dominant under psychrophilic conditions. ► Dissolved methane could be removed with a degassing membrane.
- Sprache
- Englisch
- Identifikatoren
- ISSN: 0043-1354eISSN: 1879-2448DOI: 10.1016/j.watres.2012.07.061Titel-ID: cdi_proquest_miscellaneous_1069203944
- Format
- –
- Schlagworte
- ambient temperature, Anaerobic treatment, Anaerobiosis, Applied sciences, Archaea - genetics, Archaea - metabolism, Archaeal community structure, biogas, biological treatment, chemical oxygen demand, Communities, community structure, Crack opening displacement, Degassing membrane, Dissolution, Dissolved methane, Exact sciences and technology, greenhouse gas emissions, Methane, Methane - chemistry, Methane - metabolism, methanogens, Municipal wastewater, Pollution, Psychrophilic condition, Recovery, ribosomal RNA, RNA, Ribosomal, 16S, Sludge, summer, Temperature, Upflow anaerobic sludge blanket process, upflow anaerobic sludge blanket reactor, Waste Disposal, Fluid - methods, Waste water, Water treatment and pollution, winter