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Conference Paper: Startup of thermophilic (55°C) UASB reactors using different mesophilic seed sludges

TitleStartup of thermophilic (55°C) UASB reactors using different mesophilic seed sludges
Authors
KeywordsAnaerobic
Bioactivity
Granulation
Granule
Sludge
Startup
Thermophilic
Uasb
Yield
Issue Date1996
PublisherIWA Publishing. The Journal's web site is located at http://www.iwapublishing.com/template.cfm?name=iwapwst
Citation
The 18th Biennial Conference of the International Association on Water Quality, Singapore, 23-28 June 1996. In Water Science And Technology, 1996, v. 34 n. 5-6 -6 pt 3, p. 445-452 How to Cite?
AbstractPerformances during startup of three 2.8-litre UASB (upflow anaerobic sludge blanket) reactors operated under thermophilic condition were investigated. All reactors were seeded with mesophilic sludges: one with flocculent digester sludge (Reactor-F), another with UASB granules (Reactor-G), and the third with disintegrated granules (Reactor-D). The reactors were operated in parallel at 55°C and 24 hours of retention time, using sucrose and milk as substrate at COD (chemical oxygen demand) loadings up to 10 g-COD/l·day. Immediately after temperature was step-increased from 37°C to 55°C, all reactors encountered sludge washout and deterioration of COD removal efficiency; however, the impact of temperature increase was more severe on Reactor-F. Sludge granulation took place in all reactors; first granules became noticeable after 45 days in Reactor-D, and after 90 days in Reactor-F. Reactor-G and Reactor-D were capable of removing 95% of soluble COD after 75 days, while Reactor-F after 110 days. Throughout this study, there was little difference in performance between Reactors G and D. The thermophilic granule were estimated to have a yield of 0.099 g-VSS/g-COD, and a methanogenic activity of 0.71-1.55 g-methane-COD/g-VSS·day, comparable to that of mesophilic granules. | Performances during startup of three 2.8-litre UASB (upflow anaerobic sludge blanket) reactors operated under thermophilic condition were investigated. All reactors were seeded with mesophilic sludges: one with flocculent digester sludge (Reactor-F), another with UASB granules (Reactor-G), and the third with disintegrated granules (Reactor-D). The reactors were operated in parallel at 55 °C and 24 hours of retention time, using sucrose and milk as substrate at COD (chemical oxygen demand) loadings up to 10 g-COD/l·day. Immediately after temperature was step-increased from 37 °C to 55 °C, all reactors encountered sludge washout and deterioration of COD removal efficiency; however, the impact of temperature increase was more severe on Reactor-F. Sludge granulation took place in all reactors; first granules became noticeable after 45 days in Reactor-D, and after 90 days in Reactor-F. Reactor-G and Reactor-D were capable of removing 95% of soluble COD after 75 days, while Reactor-F after 110 days. Throughout this study, there was little difference in performance between Reactors G and D. The thermophilic granule were estimated to have a yield of 0.099 g-VSS/g-COD, and a methanogenic activity of 0.71-1.55 g-methane-COD/g-VSS·day, comparable to that of mesophilic granules.
Persistent Identifierhttp://hdl.handle.net/10722/152105
ISSN
2015 Impact Factor: 1.064
2015 SCImago Journal Rankings: 0.469
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorFang, HHPen_US
dc.contributor.authorLau, IWCen_US
dc.date.accessioned2012-06-26T06:35:13Z-
dc.date.available2012-06-26T06:35:13Z-
dc.date.issued1996en_US
dc.identifier.citationThe 18th Biennial Conference of the International Association on Water Quality, Singapore, 23-28 June 1996. In Water Science And Technology, 1996, v. 34 n. 5-6 -6 pt 3, p. 445-452en_US
dc.identifier.issn0273-1223en_US
dc.identifier.urihttp://hdl.handle.net/10722/152105-
dc.description.abstractPerformances during startup of three 2.8-litre UASB (upflow anaerobic sludge blanket) reactors operated under thermophilic condition were investigated. All reactors were seeded with mesophilic sludges: one with flocculent digester sludge (Reactor-F), another with UASB granules (Reactor-G), and the third with disintegrated granules (Reactor-D). The reactors were operated in parallel at 55°C and 24 hours of retention time, using sucrose and milk as substrate at COD (chemical oxygen demand) loadings up to 10 g-COD/l·day. Immediately after temperature was step-increased from 37°C to 55°C, all reactors encountered sludge washout and deterioration of COD removal efficiency; however, the impact of temperature increase was more severe on Reactor-F. Sludge granulation took place in all reactors; first granules became noticeable after 45 days in Reactor-D, and after 90 days in Reactor-F. Reactor-G and Reactor-D were capable of removing 95% of soluble COD after 75 days, while Reactor-F after 110 days. Throughout this study, there was little difference in performance between Reactors G and D. The thermophilic granule were estimated to have a yield of 0.099 g-VSS/g-COD, and a methanogenic activity of 0.71-1.55 g-methane-COD/g-VSS·day, comparable to that of mesophilic granules. | Performances during startup of three 2.8-litre UASB (upflow anaerobic sludge blanket) reactors operated under thermophilic condition were investigated. All reactors were seeded with mesophilic sludges: one with flocculent digester sludge (Reactor-F), another with UASB granules (Reactor-G), and the third with disintegrated granules (Reactor-D). The reactors were operated in parallel at 55 °C and 24 hours of retention time, using sucrose and milk as substrate at COD (chemical oxygen demand) loadings up to 10 g-COD/l·day. Immediately after temperature was step-increased from 37 °C to 55 °C, all reactors encountered sludge washout and deterioration of COD removal efficiency; however, the impact of temperature increase was more severe on Reactor-F. Sludge granulation took place in all reactors; first granules became noticeable after 45 days in Reactor-D, and after 90 days in Reactor-F. Reactor-G and Reactor-D were capable of removing 95% of soluble COD after 75 days, while Reactor-F after 110 days. Throughout this study, there was little difference in performance between Reactors G and D. The thermophilic granule were estimated to have a yield of 0.099 g-VSS/g-COD, and a methanogenic activity of 0.71-1.55 g-methane-COD/g-VSS·day, comparable to that of mesophilic granules.en_US
dc.languageengen_US
dc.publisherIWA Publishing. The Journal's web site is located at http://www.iwapublishing.com/template.cfm?name=iwapwsten_US
dc.relation.ispartofWater Science and Technologyen_US
dc.subjectAnaerobicen_US
dc.subjectBioactivityen_US
dc.subjectGranulationen_US
dc.subjectGranuleen_US
dc.subjectSludgeen_US
dc.subjectStartupen_US
dc.subjectThermophilicen_US
dc.subjectUasben_US
dc.subjectYielden_US
dc.titleStartup of thermophilic (55°C) UASB reactors using different mesophilic seed sludgesen_US
dc.typeConference_Paperen_US
dc.identifier.emailFang, HHP:hrechef@hkucc.hku.hken_US
dc.identifier.authorityFang, HHP=rp00115en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1016/0273-1223(96)00677-4en_US
dc.identifier.scopuseid_2-s2.0-0029993812en_US
dc.identifier.hkuros26882-
dc.identifier.volume34en_US
dc.identifier.issue5-6, pt 3en_US
dc.identifier.spage445en_US
dc.identifier.epage452en_US
dc.identifier.isiWOS:A1996VT20300055-
dc.publisher.placeUnited Kingdomen_US
dc.identifier.scopusauthoridFang, HHP=7402542625en_US
dc.identifier.scopusauthoridLau, IWC=7006768100en_US
dc.customcontrol.immutablesml 151113 - merged-

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