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Conference Paper: Anaerobic treatment of proteinaceous wastewater under mesophilic and thermophilic conditions

TitleAnaerobic treatment of proteinaceous wastewater under mesophilic and thermophilic conditions
Authors
KeywordsAnaerobic treatment
Mesophilic
Peptone
Proteinaceous wastewaters
Thermophilic
UASB
Issue Date1999
PublisherIWA Publishing. The Journal's web site is located at http://www.iwapublishing.com/template.cfm?name=iwapwst
Citation
The 4th International Symposium on Waste Management Problems in Agro-Industries, Istanbul, Turkey; 23-25 September 1998. In Water Science And Technology, 1999, v. 40 n. 1, p. 77-84 How to Cite?
AbstractExperiments were conducted in two 2.8 liter UASB (upflow anaerobic sludge blanket) reactors treating proteinaceous wastewaters at 37°and 55°C with 9 hours of hydraulic retention. Results showed that the mesophilic reactor consistently removed 83.5-85.1% of COD (chemical oxygen demand) at loading rates ranging 8-22 g COD l-1 d-1 (corresponding to 3000-8250 mg l-1 of proteinaceous COD in wastewater), whereas the thermophilic reactor removed only 68.5-82.7%. At 32 g COD l-1 d-1 (i.e. 12000 mg COD l-1), the removal efficiencies were lowered to 75.7% in the mesophilic reactor and 65.1% in the thermophilic reactor. At 42 g COD l-1 d-1, severe sludge washout occurred in the mesophilic reactor; at the same loading rate, the thermophilic reactor removed only 53.8% of COD even though sludge washout was under control. The degradation rate in the both reactors was limited by the initial hydrolysis of proteins. However, batch tests showed that thermophilic sludge had slightly higher methanogenic activities than mesophilic sludge in treating proteins and intermediate acids, except propionate. The sludge yields in mesophilic and thermophilic reactors were 0.066 and 0.099 g VSS g COD-1, respectively. Observations by scanning electron microscopy indicated that both types of sludge granules were of irregular shape. There was little noticeable difference between the two granules; both had neither a layered microstructure nor a predominant bacterial species. | Experiments were conducted in two 2.8 liter UASB (upflow anaerobic sludge blanket) reactors treating proteinaceous wastewaters at 37° and 55°C with 9 hours of hydraulic retention. Results showed that the mesophilic reactor consistently removed 83.5-85.1% of COD (chemical oxygen demand) at loading rates ranging 8-22 g COD l-1 d-1 (corresponding to 3000-8250 mg l-1 of proteinaceous COD in wastewater), whereas the thermophilic reactor removed only 68.5-82.7%. At 32 g COD l-1 d-1 (i.e. 12000 mg COD l-1), the removal efficiencies were lowered to 75.7% in the mesophilic reactor and 65.1% in the thermophilic reactor. At 42 g COD l-1 d-1, severe sludge washout occurred in the mesophilic reactor; at the same loading rate, the thermophilic reactor removed only 53.8% of COD even though sludge washout was under control. The degradation rate in the both reactors was limited by the initial hydrolysis of proteins. However, batch tests showed that thermophilic sludge had slightly higher methanogenic activities than mesophilic sludge in treating proteins and intermediate acids, except propionate. The sludge yields in mesophilic and thermophilic reactors were 0.066 and 0.099 g VSS g COD-1, respectively. Observations by scanning electron microscopy indicated that both types of sludge granules were of irregular shape. There was little noticeable difference between the two granules; both had neither a layered microstructure nor a predominant bacterial species.
Persistent Identifierhttp://hdl.handle.net/10722/71876
ISSN
2015 Impact Factor: 1.064
2015 SCImago Journal Rankings: 0.469
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorFang, HHPen_HK
dc.contributor.authorChung, DWCen_HK
dc.date.accessioned2010-09-06T06:35:57Z-
dc.date.available2010-09-06T06:35:57Z-
dc.date.issued1999en_HK
dc.identifier.citationThe 4th International Symposium on Waste Management Problems in Agro-Industries, Istanbul, Turkey; 23-25 September 1998. In Water Science And Technology, 1999, v. 40 n. 1, p. 77-84en_HK
dc.identifier.issn0273-1223en_HK
dc.identifier.urihttp://hdl.handle.net/10722/71876-
dc.description.abstractExperiments were conducted in two 2.8 liter UASB (upflow anaerobic sludge blanket) reactors treating proteinaceous wastewaters at 37°and 55°C with 9 hours of hydraulic retention. Results showed that the mesophilic reactor consistently removed 83.5-85.1% of COD (chemical oxygen demand) at loading rates ranging 8-22 g COD l-1 d-1 (corresponding to 3000-8250 mg l-1 of proteinaceous COD in wastewater), whereas the thermophilic reactor removed only 68.5-82.7%. At 32 g COD l-1 d-1 (i.e. 12000 mg COD l-1), the removal efficiencies were lowered to 75.7% in the mesophilic reactor and 65.1% in the thermophilic reactor. At 42 g COD l-1 d-1, severe sludge washout occurred in the mesophilic reactor; at the same loading rate, the thermophilic reactor removed only 53.8% of COD even though sludge washout was under control. The degradation rate in the both reactors was limited by the initial hydrolysis of proteins. However, batch tests showed that thermophilic sludge had slightly higher methanogenic activities than mesophilic sludge in treating proteins and intermediate acids, except propionate. The sludge yields in mesophilic and thermophilic reactors were 0.066 and 0.099 g VSS g COD-1, respectively. Observations by scanning electron microscopy indicated that both types of sludge granules were of irregular shape. There was little noticeable difference between the two granules; both had neither a layered microstructure nor a predominant bacterial species. | Experiments were conducted in two 2.8 liter UASB (upflow anaerobic sludge blanket) reactors treating proteinaceous wastewaters at 37° and 55°C with 9 hours of hydraulic retention. Results showed that the mesophilic reactor consistently removed 83.5-85.1% of COD (chemical oxygen demand) at loading rates ranging 8-22 g COD l-1 d-1 (corresponding to 3000-8250 mg l-1 of proteinaceous COD in wastewater), whereas the thermophilic reactor removed only 68.5-82.7%. At 32 g COD l-1 d-1 (i.e. 12000 mg COD l-1), the removal efficiencies were lowered to 75.7% in the mesophilic reactor and 65.1% in the thermophilic reactor. At 42 g COD l-1 d-1, severe sludge washout occurred in the mesophilic reactor; at the same loading rate, the thermophilic reactor removed only 53.8% of COD even though sludge washout was under control. The degradation rate in the both reactors was limited by the initial hydrolysis of proteins. However, batch tests showed that thermophilic sludge had slightly higher methanogenic activities than mesophilic sludge in treating proteins and intermediate acids, except propionate. The sludge yields in mesophilic and thermophilic reactors were 0.066 and 0.099 g VSS g COD-1, respectively. Observations by scanning electron microscopy indicated that both types of sludge granules were of irregular shape. There was little noticeable difference between the two granules; both had neither a layered microstructure nor a predominant bacterial species.en_HK
dc.languageengen_HK
dc.publisherIWA Publishing. The Journal's web site is located at http://www.iwapublishing.com/template.cfm?name=iwapwsten_HK
dc.relation.ispartofWater Science and Technologyen_HK
dc.subjectAnaerobic treatmenten_HK
dc.subjectMesophilicen_HK
dc.subjectPeptoneen_HK
dc.subjectProteinaceous wastewatersen_HK
dc.subjectThermophilicen_HK
dc.subjectUASBen_HK
dc.titleAnaerobic treatment of proteinaceous wastewater under mesophilic and thermophilic conditionsen_HK
dc.typeConference_Paperen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0273-1223&volume=40 &issue=1&spage=77 &epage= 84&date=1999&atitle=Anaerobic+treatment+of+proteinaceous+wastewater+under+mesophilic+and+thermophilic+conditionsen_HK
dc.identifier.emailFang, HHP:hrechef@hkucc.hku.hken_HK
dc.identifier.authorityFang, HHP=rp00115en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/S0273-1223(99)00366-2en_HK
dc.identifier.scopuseid_2-s2.0-0032831984en_HK
dc.identifier.hkuros48504en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0032831984&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume40en_HK
dc.identifier.issue1en_HK
dc.identifier.spage77en_HK
dc.identifier.epage84en_HK
dc.identifier.isiWOS:000082750600011-
dc.publisher.placeUnited Kingdomen_HK
dc.description.otherThe 4th International Symposium on Waste Management Problems in Agro-Industries, Istanbul, Turkey; 23-25 September 1998. In Water Science And Technology, 1999, v. 40 n. 1, p. 77-84-
dc.identifier.scopusauthoridFang, HHP=7402542625en_HK
dc.identifier.scopusauthoridChung, DWC=23483497200en_HK
dc.customcontrol.immutablesml 151113 - merged-

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