Control of scum accumulation in a double stage biogas collection (DSBC) UASB reactor treating domestic wastewater

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 mu...

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Bibliographic Details
Published in:Water science and technology 2009-01, Vol.59 (6), p.1077-1083
Main Authors: Pereira, J O, Celani, J S S, Chernicharo, C A L
Format: Article
Language:English
Subjects:
Accumulation
Biogas
Bioreactors
Coefficients
Collection
Control
Disaggregation
Domestic wastewater
Gases - chemistry
Municipal wastewater
Reactors
Scum
Upflow anaerobic sludge blanket reactors
Waste Disposal, Fluid - instrumentation
Waste Disposal, Fluid - methods
Wastewater
Wastewater treatment
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Summary: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.
ISSN:0273-1223
1996-9732
DOI:10.2166/wst.2009.093