Association of a UASB reactor and a submerged aerated biofilter for domestic sewage treatment

Association of a UASB reactor and a submerged aerated biofilter for domestic sewage treatment

This paper presents exploratory results on the association of an Upflow Anaerobic Sludge Blanket - UASB reactor (46 L) and a submerged aerated biofilter - BF (6.3 L) for domestic sewage treatment. The experimental period extended for 322 days, during which the hydraulic and organic loads were gradua...

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Published in:WATER QUALITY INTERNATIONAL '98. PART 7. WASTEWATER: BIOLOGICAL PROCESSES Vol. 38; no. 8-9; pp. 189 - 195
Main Authors: Gongalves, Ricardo Franci, de Araújo, Vera Lúcia, Chernicharo, Carlos Augusto L.
Format: Journal Article Conference Proceeding
Language:English
Published: New York NY Elsevier Ltd 1998
Oxford Pergamon Press
IWA Publishing
Subjects:
Aeration
Biofilm
Biofilters
Biological and medical sciences
Biological treatment of waters
Biotechnology
Detention time
domestic sewage treatment
Effluent treatment
Effluents
Environment and pollution
Fundamental and applied biological sciences. Psychology
Household wastes
Hydraulic loading
Hydraulics
Industrial applications and implications. Economical aspects
Loads (forces)
Organic loading
post-treatment
Reactors
Removal
Sewage
Sewage disposal
Sewage treatment
Sludge
submerged aerated biofilter
UASB reactor
Upflow anaerobic sludge blanket reactors
Wastewater treatment
Biofilm
UASB reactor
submerged aerated biofilter
post-treatment
domestic sewage treatment
Performance evaluation
Domestic waste water
Bioreactor
Upflow anaerobic sludge blanket reactor
Biofilter
Waste water purification
Biological purification
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Summary:This paper presents exploratory results on the association of an Upflow Anaerobic Sludge Blanket - UASB reactor (46 L) and a submerged aerated biofilter - BF (6.3 L) for domestic sewage treatment. The experimental period extended for 322 days, during which the hydraulic and organic loads were gradually increased in both reactors. Having the UASB as a reference, the following hydraulic loads were tested: 0.4 m3/m2.h (θ = 16 h); 0.6m3/m2.h (θ = 10h); 0.8 m3/m2.h (0 = 8 h); 1.0 m3/m2.h (0 = 6 h) and 1.45 m3/m2.h (0 = 4h). During the experiments carried out with the UASB reactor operating at a hydraulic detention time of 6 hours, related to a 0 <11` in the granular media of the BF, the mean removal efficiency in terms of SS, BOD5 and COD, in both reactors, were respectively 94%, 96% and 91%. The final effluent, related to the BF effluent, presented the following mean characteristics: SS = 10 mg/L, BOD5 = 9 mg/L and COD = 38 mg/L. The results obtained in the last phase of the experiments, when the hydraulic load in the UASB reactor reached 1.45 m3/m2.h (θ = 4h), were similar to those obtained in the previous phase. These results demonstrate that infmerged aerated biofilters can be considered a viable alternative for the post-treatment of effluents from UASB reactors treating domestic sewage. These reactors are capable of being operated with very short hydraulic detention times.
Bibliography:ObjectType-Article-2
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ISBN:9780080433950
0080433952
ISSN:0273-1223
1996-9732
DOI:10.1016/S0273-1223(98)00693-3