INIQUI 05448
INSTITUTO DE INVESTIGACIONES PARA LA INDUSTRIA QUIMICA
Unidad Ejecutora - UE
artículos
Título:
Stability and activity of anaerobic sludge from UASB reactors treating sewage in subtropical regions
Autor/es:
L. SEGHEZZO; C.M. CUEVAS; A.P. TRUPIANO; R.G. GUERRA; S.M. GONZÁLEZ; G. ZEEMAN; G. LETTINGA
Revista:
WATER SCIENCE AND TECHNOLOGY
Editorial:
IWA Publishing
Referencias:
Año: 2006 vol. 54 p. 223 - 229
ISSN:
0273-1223
Resumen:
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.
