Lookup NU author(s): Fatihah Suja,
Professor Thomas Donnelly
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A comparative study to explore the characteristics of partially and fully packed biological aerated filters (BAFs) in the removal of carbon pollutant, reveals that the partial- bed reactor can perform comparably well with the full-bed reactor. The organic removal rate was 5.34 kg COD m(-3) d(-1) at Organic Loading Rates (OLR) 5.80 +/- 0.31 kg COD m(-3) d(-1) for the full- bed, and 5.22 kg COD m(-3) d(-1) at OLR 5.79 +/- 0.29 kg CODm(-3) d(-1) for the partial- bed. In the partial- bed system, where the masses of biomass were only 41 - 51% of those of the full- bed, the maximum carbon removal limit was still between 5 to 6 kg COD m(-3) d(-1). At organic loadings above 5.0 kg COD m(-3) d-(1,) the carbon removal capacity in both systems was limited by the mass and activity of microorganisms. The SRT in the full and partial- bed reactors was primarily controlled by the biomass loss in the effluent and during backwash operation. The SRT was reduced from 20.08 days at OLR 4.18 +/- 0.20 kgCODm(-3) d(-1) to 7.62 days at OLR 5.80 +/- 0.31 kg COD m(-3) d(-1) in the full- bed, and from 7.17 days to 4.21 days in the partial- bed. After all, SRT values in the partial- bed were always lower than those in the full- bed.
Author(s): Suja F, Donnelly T
Publication type: Article
Publication status: Published
Journal: Water Science and Technology
Print publication date: 01/01/2008
ISSN (print): 0273-1223
Publisher: IWA Publishing
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