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Article: Intracellular polymers in aerobic sludge of sequencing batch reactors

TitleIntracellular polymers in aerobic sludge of sequencing batch reactors
Authors
Issue Date2000
PublisherAmerican Society of Civil Engineers. The Journal's web site is located at http://www.pubs.asce.org/journals/ee.html
Citation
Journal Of Environmental Engineering, 2000, v. 126 n. 8, p. 732-738 How to Cite?
AbstractThe formation and characteristics of intracellular polymers in aerobic sludge of sequencing batch reactors were investigated at ambient temperature under balanced nutrient conditions. Three substrates of different chemical natures, including fatty acid (acetate), carbohydrate (glucose), and aromatic (benzoate), were fed to individual reactors. When substrates were initially in excess, the sludge in all reactors was capable of converting soluble substrates into intracellular polymers under aerobic conditions. Acetate (up to 27%) and benzoate (up to 51%) were converted to poly-β-hydroxybutyrate, whereas glucose (up to 33%) was converted to intracellular carbohydrates. The initial substrate depletion rates were 208-243 mg-C/g-VSS/h for acetate, 491-590 mg-C/g-VSS/h for benzoate, and 405-558 mg-C/g-VSS/h for glucose. When external substrates were absent in the mixed liquor, the intracellular polymers could be consumed by the sludge for endogeneous respiration under aerobic conditions or as a carbon source for denitrification under anoxic conditions. These results suggest a dynamic metabolic mechanism in the sequencing batch reactors. | The formation and characteristics of intracellular polymers in aerobic sludge of sequencing batch reactors were investigated at ambient temperature under balanced nutrient conditions. Three substrates of different chemical natures, including fatty acid (acetate), carbohydrate (glucose), and aromatic (benzoate), were fed to individual reactors. When substrates were initially in excess, the sludge in all reactors was capable of converting soluble substrates into intracellular polymers under aerobic conditions. Acetate (up to 27%) and benzoate (up to 51%) were converted to poly-β-hydroxybutyrate, whereas glucose (up to 33%) was converted to intracellular carbohydrates. The initial substrate depletion rates were 208-243 mg-C/g-VSS/h for acetate, 491-590 mg-C/g-VSS/h for benzoate, and 405-558 mg-C/g-VSS/h for glucose. When external substrates were absent in the mixed liquor, the intracellular polymers could be consumed by the sludge for endogenous respiration under aerobic conditions or as a carbon source for denitrification under anoxic conditions. These results suggest a dynamic metabolic mechanism in the sequencing batch reactors. | Findings are presented from a study enacted to help characterize the formation and features of intracellular polymers in aerobic sludge of sequencing batch reactors. Tests investigating these issues were enacted under conditions of ambient temperature and balanced nutrient conditions. Individual reactors were fed with three substrates defined by different chemical natures, e.g., fatty acid (acetate), carbohydrate (glucose), and aromatic (benzoate). For scenarios in which substrates were initially present in excess, sludges from all reactors tested proved capable of transforming soluble substrates into intracellular polymers under aerobic conditions. Factors that suggested a dynamic metabolic mechanism operating in the sequencing batch reactors are considered.
Persistent Identifierhttp://hdl.handle.net/10722/70800
ISSN
2015 Impact Factor: 1.125
2015 SCImago Journal Rankings: 0.462
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorFang, HHPen_HK
dc.contributor.authorLiu, Yen_HK
dc.date.accessioned2010-09-06T06:26:14Z-
dc.date.available2010-09-06T06:26:14Z-
dc.date.issued2000en_HK
dc.identifier.citationJournal Of Environmental Engineering, 2000, v. 126 n. 8, p. 732-738en_HK
dc.identifier.issn0733-9372en_HK
dc.identifier.urihttp://hdl.handle.net/10722/70800-
dc.description.abstractThe formation and characteristics of intracellular polymers in aerobic sludge of sequencing batch reactors were investigated at ambient temperature under balanced nutrient conditions. Three substrates of different chemical natures, including fatty acid (acetate), carbohydrate (glucose), and aromatic (benzoate), were fed to individual reactors. When substrates were initially in excess, the sludge in all reactors was capable of converting soluble substrates into intracellular polymers under aerobic conditions. Acetate (up to 27%) and benzoate (up to 51%) were converted to poly-β-hydroxybutyrate, whereas glucose (up to 33%) was converted to intracellular carbohydrates. The initial substrate depletion rates were 208-243 mg-C/g-VSS/h for acetate, 491-590 mg-C/g-VSS/h for benzoate, and 405-558 mg-C/g-VSS/h for glucose. When external substrates were absent in the mixed liquor, the intracellular polymers could be consumed by the sludge for endogeneous respiration under aerobic conditions or as a carbon source for denitrification under anoxic conditions. These results suggest a dynamic metabolic mechanism in the sequencing batch reactors. | The formation and characteristics of intracellular polymers in aerobic sludge of sequencing batch reactors were investigated at ambient temperature under balanced nutrient conditions. Three substrates of different chemical natures, including fatty acid (acetate), carbohydrate (glucose), and aromatic (benzoate), were fed to individual reactors. When substrates were initially in excess, the sludge in all reactors was capable of converting soluble substrates into intracellular polymers under aerobic conditions. Acetate (up to 27%) and benzoate (up to 51%) were converted to poly-β-hydroxybutyrate, whereas glucose (up to 33%) was converted to intracellular carbohydrates. The initial substrate depletion rates were 208-243 mg-C/g-VSS/h for acetate, 491-590 mg-C/g-VSS/h for benzoate, and 405-558 mg-C/g-VSS/h for glucose. When external substrates were absent in the mixed liquor, the intracellular polymers could be consumed by the sludge for endogenous respiration under aerobic conditions or as a carbon source for denitrification under anoxic conditions. These results suggest a dynamic metabolic mechanism in the sequencing batch reactors. | Findings are presented from a study enacted to help characterize the formation and features of intracellular polymers in aerobic sludge of sequencing batch reactors. Tests investigating these issues were enacted under conditions of ambient temperature and balanced nutrient conditions. Individual reactors were fed with three substrates defined by different chemical natures, e.g., fatty acid (acetate), carbohydrate (glucose), and aromatic (benzoate). For scenarios in which substrates were initially present in excess, sludges from all reactors tested proved capable of transforming soluble substrates into intracellular polymers under aerobic conditions. Factors that suggested a dynamic metabolic mechanism operating in the sequencing batch reactors are considered.en_HK
dc.languageengen_HK
dc.publisherAmerican Society of Civil Engineers. The Journal's web site is located at http://www.pubs.asce.org/journals/ee.htmlen_HK
dc.relation.ispartofJournal of Environmental Engineeringen_HK
dc.rightsJournal of Environmental Engineering. Copyright © American Society of Civil Engineers.en_HK
dc.titleIntracellular polymers in aerobic sludge of sequencing batch reactorsen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0733-9372&volume=126 &issue=8&spage=732 &epage= 738&date=2000&atitle=Intracellular+polymers+in+aerobic+sludge+of+sequencing+batch+reactorsen_HK
dc.identifier.emailFang, HHP:hrechef@hkucc.hku.hken_HK
dc.identifier.authorityFang, HHP=rp00115en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1061/(ASCE)0733-9372(2000)126:8(732)en_HK
dc.identifier.scopuseid_2-s2.0-0034255542en_HK
dc.identifier.hkuros60211en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0034255542&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume126en_HK
dc.identifier.issue8en_HK
dc.identifier.spage732en_HK
dc.identifier.epage738en_HK
dc.identifier.isiWOS:000088391100007-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridFang, HHP=7402542625en_HK
dc.identifier.scopusauthoridLiu, Y=36013132500en_HK

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