Activated sludge encapsulation in gellan gum microbeads for gasoline biodegradation

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DOIResolve DOI: http://doi.org/10.1007/s00449-004-0360-6
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TypeArticle
Journal titleBioprocess and Biosystems Engineering
Volume26
Issue4
Pages197204; # of pages: 8
AbstractA two-phase dispersion technique, termed emulsification–internal gelation, is proposed for encapsulation of activated sludge in gellan gum microbeads. The influence of emulsion parameters on size distribution of microbeads was investigated. Mean diameter of microbeads varied within a range of 34–265 µm as a descending function of emulsion stirring rate (1,000–5,000 rpm), emulsification time (10–40 min), and emulsifier concentration (0–0.1% w/w), and as an ascending function of disperse phase volume fraction (0.08–0.25). Encapsulated sludge expressed a high biodegradation activity compared with non-encapsulated sludge cultures even at 4.4 times lower level of overall biomass loading. Over 90% of gasoline at an initial concentration of 35 and 70 mg l -1 was removed by both encapsulated and non-encapsulated sludge cultures in sealed serum bottles within 7 days. Encapsulation of activated sludge in gellan gum microbeads enhanced the biological activity of microbial populations in the removal of gasoline hydrocarbons. The results of this study demonstrated the feasibility of the production of size-controlled gellan gum-encapsulated sludge microbeads and their use in the biodegradation of gasoline.
Publication date
AffiliationNational Research Council Canada; NRC Biotechnology Research Institute
Peer reviewedNo
NPARC number12327769
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Record identifierc99bfdce-3316-4e33-ad9e-32eb93e1f81d
Record created2009-09-10
Record modified2016-05-09
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