Stability and activity of anaerobic sludge from UASB reactors treating sewage in subtropical regions

L. Seghezzo; C.M. Cuevas; A.P. Trupiano; R.G. Guerra; S.M. Gonzalez; G. Zeeman; G. Lettinga

doi:10.2166/wst.2006.509

Stability and activity of anaerobic sludge from UASB reactors treating sewage in subtropical regions

L. Seghezzo, C.M. Cuevas, A.P. Trupiano, R.G. Guerra, S.M. Gonzalez, G. Zeeman, G. Lettinga

Research output: Contribution to journal › Article › Academic › peer-review

13 Citations (Scopus)

Abstract

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

Original language	English
Pages (from-to)	223-229
Journal	Water Science and Technology
Volume	54
Issue number	2
DOIs	https://doi.org/10.2166/wst.2006.509
Publication status	Published - 2006

Keywords

Anaerobic treatment
Methanogenic activity
Sewage
Sludge stability
Subtropical regions
UASB reactors

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10.2166/wst.2006.509

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title = "Stability and activity of anaerobic sludge from UASB reactors treating sewage in subtropical regions",

abstract = "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",

keywords = "Anaerobic treatment, Methanogenic activity, Sewage, Sludge stability, Subtropical regions, UASB reactors",

author = "L. Seghezzo and C.M. Cuevas and A.P. Trupiano and R.G. Guerra and S.M. Gonzalez and G. Zeeman and G. Lettinga",

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doi = "10.2166/wst.2006.509",

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pages = "223--229",

journal = "Water Science and Technology",

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TY - JOUR

T1 - Stability and activity of anaerobic sludge from UASB reactors treating sewage in subtropical regions

AU - Seghezzo, L.

AU - Cuevas, C.M.

AU - Trupiano, A.P.

AU - Guerra, R.G.

AU - Gonzalez, S.M.

AU - Zeeman, G.

AU - Lettinga, G.

PY - 2006

Y1 - 2006

N2 - 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

AB - 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

KW - Anaerobic treatment

KW - Methanogenic activity

KW - Sewage

KW - Sludge stability

KW - Subtropical regions

KW - UASB reactors

U2 - 10.2166/wst.2006.509

DO - 10.2166/wst.2006.509

M3 - Article

SN - 0273-1223

VL - 54

SP - 223

EP - 229

JO - Water Science and Technology

JF - Water Science and Technology

IS - 2

ER -

Stability and activity of anaerobic sludge from UASB reactors treating sewage in subtropical regions

Abstract

Keywords

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