Bacterial behaviour in the biodegradation of phenol by indigenous bacteria immobilized in Ca-alginate beads

The phenol biodegradation by Ca-alginate immobilized indigenous bacteria was performed in batch system. The effects of some operational parameters were evaluated, including % weight of alginate, calcium and CaCl 2 , diameter of spheres; jellification time; solution concentration; adaptation concentr...

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Bibliographic Details
Published in:Environmental technology 2020-06, Vol.41 (14), p.1829-1836
Main Authors: Namane, A., Amrouche, F., Arrar, J., Ali, O., Hellal, A.
Format: Article
Language:English
Subjects:
Alginates
Alginic acid
Bacteria
Beads
Biodegradation
Biodegradation, Environmental
Calcium
Calcium alginate
Calcium chloride
Chemical properties
Concentration gradient
Glucuronic Acid
Hexuronic Acids
immobilization
indigenous bacteria
Mass transfer
Phenol
Phenols
Sodium alginate
Weight
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Summary:The phenol biodegradation by Ca-alginate immobilized indigenous bacteria was performed in batch system. The effects of some operational parameters were evaluated, including % weight of alginate, calcium and CaCl 2 , diameter of spheres; jellification time; solution concentration; adaptation concentration and alginate/cells ratio. The optimal biodegradation conditions were found for 2% and 3% of weight for respectively the sodium alginate and calcium chloride. The hardening time was 30  min and beads diameter of 4 cm. The degradation efficiency of the immobilized strains in these conditions exceeds 800 mg·L −1 . The results show that the mass transfer flow (nutritional intake) which depends on the concentration gradient (dC/dz), the physical-chemical properties of alginate beads through the diffusivity coefficient (D), govern the bacterial kinetics and the spatial and temporal behaviour of bacteria.
ISSN:0959-3330
1479-487X
DOI:10.1080/09593330.2018.1551427