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Please use this identifier to cite or link to this item: http://hdl.handle.net/10373/653

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Title: Performance of a granular-bed anaerobic baffled reactor (GRABBR) treating whisky distillery wastewater
Authors: Akunna, Joseph C.
Clark, M.
Affiliation: University of Abertay Dundee. School of Contemporary Sciences
Keywords: Anaerobic baffled reactor (ABR)
BOD and COD removal
Granular sludge
Hydraulic retention time (HRT)
Non-granular sludge
Organic loading
Phase separation
Solids retention
Anaerobic sludge blanket (UASB) reactor system
Whisky distillery wastewater
Issue Date: Sep-2000
Publisher: Elsevier
Type: Journal Article
Refereed: peer-reviewed
Rights: Published version (c)Elsevier, available from http://dx.doi.org/10.1016/S0960-8524(00)00017-1
Citation: Akunna, J.C and Clark, M. 2000. Performance of a granular-bed anaerobic baffled reactor (GRABBR) treating whisky distillery wastewater. Bioresource Technology. 74(3): pp.257-261. Available from: http://dx.doi.org/10.1016/S0960-8524(00)00017-1
Abstract: This paper reports the performance of a granular-bed anaerobic baffled reactor (GRABBR) used in the treatment of a whisky distillery wastewater. The results reveal that the system was very effective in the treatment of the high-strength wastewater. Its effectiveness stemmed from process stability created by phase separation promoted by the reactor configuration. It combined the advantages of baffled reactor systems and upflow anaerobic sludge blanket (UASB) systems. Up to 80% COD (or 90% BOD) removal was observed for an organic loading of 4.75 kg COD/m3 day. It was also found that acidogens were mostly non-granular while methanogens were granular. The GRABBR encouraged phase separation, and consequently the establishment of separate zones for granular and non-granular sludge. The system also showed very high solids retention with effluent suspended solids concentration of about 80 mg/l for all organic and hydraulic conditions studied. This was attributed to the occurrence of granular methanogens in zones (or compartments) downstream of zones occupied by non-granular acidogens.
URI: http://hdl.handle.net/10373/653
ISSN: 0960-8524
Appears in Collections:Science Engineering & Technology Collection

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