Stability and activity of anaerobic sludge from UASB reactors treating sewage in subtropical regions
| Autor: | Aníbal P. Trupiano, Grietje Zeeman, Carlos Mario Cuevas, S.M. Gonzalez, Gatze Lettinga, Lucas Seghezzo, R.G. Guerra |
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| Jazyk: | angličtina |
| Rok vydání: | 2006 |
| Předmět: |
Environmental Engineering
Anaerobic treatment Subtropical regions UASB reactors Sewage Pilot Projects Methane chemistry.chemical_compound Settling Life Science Organic matter Anaerobiosis Water Science and Technology chemistry.chemical_classification Tropical Climate WIMEK Waste management Anaerobic sludge business.industry Hydrolysis Methanogenic activity Sludge stability Kinetics chemistry Environmental Technology Sewage treatment Milieutechnologie business Anaerobic exercise |
| Zdroj: | Water Science and Technology 54 (2006) 2 Water Science and Technology, 54(2), 223-229 Proceedings VIII th Latin American Workshop on Anaerobic Digestion, Workshop Punta del Este Uruguay, 2-5 October 2005 |
| ISSN: | 0273-1223 |
| Popis: | The production of small amounts of well-stabilized biological sludge is one of the main advantages of upflow anaerobic sludge bed (UASB) reactors over aerobic wastewater treatment systems. In this work, sludge produced in three pilot-scale UASB reactors used to treat sewage under subtropical conditions was assessed for both stability and specific methanogenic activity. Stability of primary sludge from settling tanks and digested sludge from conventional sludge digesters was also measured for comparison purposes. Kinetic parameters like the hydrolysis rate constant and the decay rate constant were calculated. High stability was observed in sludge from UASB reactors. Methanogenic activity in anaerobic sludges was relatively low, probably due to the low organic matter concentration in influent sewage. Knowledge on sludge growth rate, stability, and activity might be very useful to optimize sludge management activities in full-scale UASB reactors. |
| Databáze: | OpenAIRE |
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