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Biodegradation of Methyl Orange by alginate-immobilized Aeromonas sp. in a packed bed reactor: external mass transfer modeling

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Title Biodegradation of Methyl Orange by alginate-immobilized
Aeromonas sp. in a packed bed reactor: external mass transfer
modeling
 
Creator Kathiravan, Mathur Nadarajan
Praveen, Siluvai Antony
Gim , Geun Ho
Han , Gui Hawn
Kim , Si Wouk
 
Subject Industrial Wastewater Treatment & Disposal
Environmental Biotechnology
Water Treatment
 
Description Azo dyes are recalcitrant and xenobiotic nature
makes these compounds a challenging task for continuous
biodegradation up to satisfactorily levels in large-scale. In
the present report, the biodegradation efficiency of alginate
immobilized indigenous Aeromonas sp. MNK1 on Methyl
Orange (MO) in a packed bed reactor was explored. The
experimental results were used to determine the external
mass transfer model. Complete MO degradation and COD
removal were observed at 0.20 cm bead size and 120 ml/h
flow rate at 300 mg/l of initial dye concentration. The
degradation of MO decreased with increasing bead sizes
and flow rates, which may be attributed to the decrease in
surface of the beads and higher flux of MO, respectively.
The experimental rate constants (kps) for various beads
sizes and flow rates were calculated and compared with
theoretically obtained rate constants using external film
diffusion models. From the experimental data, the externaL mass transfer effect was correlated with a model JD =
K Re-(1 - n)
. The model was tested with K value (5.7) and
the Colburn factor correlation model for 0.20, 0.40 and
0.60 bead sizes were JD = 5.7 Re-0.15, JD = 5.7 Re-0.36
and JD = 5.7 Re-0.48, respectively. Based on the results,
the Colburn factor correlation models were found to predict
the experimental data accurately. The proposed model was
constructive to design and direct industrial applications in
packed bed reactors within acceptable limits.
 
Publisher Springer
 
Date 2014-11
 
Type Article
PeerReviewed
 
Format application/pdf
 
Identifier http://neeri.csircentral.net/658/1/Biodegradation%20of%20Methyl%20Orange%20by%20alginate%20immobilized%20aeromonas%20sp%20in%20a%20packed%20bed%20reactor%20external%20mass%20transfer%20modelling.pdf
Kathiravan, Mathur Nadarajan and Praveen, Siluvai Antony and Gim , Geun Ho and Han , Gui Hawn and Kim , Si Wouk (2014) Biodegradation of Methyl Orange by alginate-immobilized Aeromonas sp. in a packed bed reactor: external mass transfer modeling. Bioprocess and Biosystems Engineering, 37 (11). pp. 2149-2162. ISSN 1615-7591 (Print) 1615-7605 (Online)
 
Relation http://link.springer.com/journal/449
http://neeri.csircentral.net/658/