This paper presents an innovative reactor concept which is based on a double-stage biogas collection (DSBC) device aimed at controlling scum formation and accumulation in UASB reactors treating municipal wastewater. Scum production inside a control reactor and a DSBC-UASB reactor was compared and much lower scum yield coefficients were observed for the DSBC-UASB reactor. However, the mass balance indicated that the dominant control mechanism was scum disaggregation and exit to settler zone rather than scum degradation.
Control of scum accumulation in a double stage biogas collection (DSBC) UASB reactor treating domestic wastewater
J. O. Pereira, J. S. S. Celani, C. A. L. Chernicharo; Control of scum accumulation in a double stage biogas collection (DSBC) UASB reactor treating domestic wastewater. Water Sci Technol 1 March 2009; 59 (6): 1077–1083. doi: https://doi.org/10.2166/wst.2009.093
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