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Article: Effect of the food-to-microorganism (F/M) ratio on the formation and size of aerobic sludge granules

TitleEffect of the food-to-microorganism (F/M) ratio on the formation and size of aerobic sludge granules
Authors
KeywordsActivated sludge
Aerobic granulation
Aerobic sludge
Bacterial species
Biological waste water treatment
Issue Date2011
PublisherElsevier Ltd. The Journal's web site is located at http://www.elsevier.com/locate/procbio
Citation
Process Biochemistry, 2011, v. 46 n. 12, p. 2269-2276 How to Cite?
AbstractLaboratory experiments were carried out to investigate the effect of the sludge loading, or the food-to-microorganism (F/M) ratio, on the rate of aerobic granulation and the size of the granules in biological wastewater treatment. Four column batch reactors were used with a similar sludge suspended solids (SS) concentration of around 2000 mg/L. The reactors were fed with a glucose-based wastewater at different chemical oxygen demand (COD) concentrations, resulting in F/M ratios from 0.3 to 1.1 g COD/g SS-d. A higher F/M ratio appeared to promote faster formation of larger granules and a lower F/M ratio led to slower formation of smaller granules. Upon complete granulation, the granules became rather stable in size, and the mean diameter of the granules in different reactors increased from 1.2 to 4.5 mm linearly with the F/M ratio applied. Molecular analysis of the sludge did not show the domination of any particular bacterial species during the granulation process. It is apparent that applying different F/M ratios in different granulation stages, e.g., a higher F/M in the early stage and a reduced F/M in the later stage, can be an effective start-up strategy to facilitate rapid granule formation and sustain small and healthy granules in bioreactors. © 2011 Elsevier Ltd. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/150614
ISSN
2015 Impact Factor: 2.529
2015 SCImago Journal Rankings: 0.937
ISI Accession Number ID
Funding AgencyGrant Number
Research Grants Council (RGC) of the Hong Kong SAR GovernmentHKU7144/E07
N_HKU 774/11
Natural Science Foundation of China51129803
State Key Joint Laboratory of Environment Simulation and Pollution Control, Beijing, China10Y02ESPCN
Funding Information:

This research was supported by grants HKU7144/E07 and N_HKU 774/11 from the Research Grants Council (RGC) of the Hong Kong SAR Government, grant 51129803 from the Natural Science Foundation of China, and special fund 10Y02ESPCN from State Key Joint Laboratory of Environment Simulation and Pollution Control, Beijing, China. The technical assistance of Mr. Keith C.H. Wong is highly appreciated.

References

 

DC FieldValueLanguage
dc.contributor.authorLi, AJen_US
dc.contributor.authorLi, XYen_US
dc.contributor.authorYu, HQen_US
dc.date.accessioned2012-06-26T06:06:09Z-
dc.date.available2012-06-26T06:06:09Z-
dc.date.issued2011en_US
dc.identifier.citationProcess Biochemistry, 2011, v. 46 n. 12, p. 2269-2276en_US
dc.identifier.issn1359-5113en_US
dc.identifier.urihttp://hdl.handle.net/10722/150614-
dc.description.abstractLaboratory experiments were carried out to investigate the effect of the sludge loading, or the food-to-microorganism (F/M) ratio, on the rate of aerobic granulation and the size of the granules in biological wastewater treatment. Four column batch reactors were used with a similar sludge suspended solids (SS) concentration of around 2000 mg/L. The reactors were fed with a glucose-based wastewater at different chemical oxygen demand (COD) concentrations, resulting in F/M ratios from 0.3 to 1.1 g COD/g SS-d. A higher F/M ratio appeared to promote faster formation of larger granules and a lower F/M ratio led to slower formation of smaller granules. Upon complete granulation, the granules became rather stable in size, and the mean diameter of the granules in different reactors increased from 1.2 to 4.5 mm linearly with the F/M ratio applied. Molecular analysis of the sludge did not show the domination of any particular bacterial species during the granulation process. It is apparent that applying different F/M ratios in different granulation stages, e.g., a higher F/M in the early stage and a reduced F/M in the later stage, can be an effective start-up strategy to facilitate rapid granule formation and sustain small and healthy granules in bioreactors. © 2011 Elsevier Ltd. All rights reserved.en_US
dc.languageengen_US
dc.publisherElsevier Ltd. The Journal's web site is located at http://www.elsevier.com/locate/procbioen_US
dc.relation.ispartofProcess Biochemistryen_US
dc.rightsNOTICE: this is the author’s version of a work that was accepted for publication in Process Biochemistry. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Process Biochemistry, 2011, v. 46 n. 12, p. 2269-2276. DOI: 10.1016/j.procbio.2011.09.007-
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.subjectActivated sludgeen_US
dc.subjectAerobic granulationen_US
dc.subjectAerobic sludgeen_US
dc.subjectBacterial speciesen_US
dc.subjectBiological waste water treatmenten_US
dc.titleEffect of the food-to-microorganism (F/M) ratio on the formation and size of aerobic sludge granulesen_US
dc.typeArticleen_US
dc.identifier.emailLi, AJ: h0595525@hku.hken_US
dc.identifier.emailLi, XY: xlia@hkucc.hku.hk-
dc.identifier.authorityLi, XY=rp00222en_US
dc.description.naturepostprinten_US
dc.identifier.doi10.1016/j.procbio.2011.09.007en_US
dc.identifier.scopuseid_2-s2.0-80055025102en_US
dc.identifier.hkuros209077-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-80055025102&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume46en_US
dc.identifier.issue12en_US
dc.identifier.spage2269en_US
dc.identifier.epage2276en_US
dc.identifier.isiWOS:000297832000008-
dc.publisher.placeUnited Kingdomen_US
dc.identifier.scopusauthoridYu, HQ=13008678100en_US
dc.identifier.scopusauthoridLi, XY=26642887900en_US
dc.identifier.scopusauthoridLi, AJ=54397398800en_US

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