Biodegradation kinetics of 4-fluorocinnamic acid by a consortium of Arthrobacter and Ralstonia strains

Syed A. Hasan, Piet Wietzes, Dick B. Janssen*

*Bijbehorende auteur voor dit werk

Onderzoeksoutput: ArticleAcademicpeer review

7 Citaten (Scopus)

Samenvatting

Arthrobacter sp. strain G1 is able to grow on 4-fluorocinnamic acid (4-FCA) as sole carbon source. The organism converts 4-FCA into 4-fluorobenzoic acid (4-FBA) and utilizes the two-carbon side-chain for growth with some formation of 4-fluoroacetophenone as a dead-end side product. We also have isolated Ralstonia sp. strain H1, an organism that degrades 4-FBA. A consortium of strains G1 and H1 degraded 4-FCA with Monod kinetics during growth in batch and continuous cultures. Specific growth rates of strain G1 and specific degradation rates of 4-FCA were observed to follow substrate inhibition kinetics, which could be modeled using the kinetic models of Haldane-Andrew and Luong-Levenspiel. The mixed culture showed complete mineralization of 4-FCA with quantitative release of fluoride, both in batch and continuous cultures. Steady-state chemostat cultures that were exposed to shock loadings of substrate responded with rapid degradation and returned to steady-state in 10-15 h, indicating that the mixed culture provided a robust system for continuous 4-FCA degradation.

Originele taal-2English
Pagina's (van-tot)117-125
Aantal pagina's9
TijdschriftBiodegradation
Volume23
Nummer van het tijdschrift1
DOI's
StatusPublished - feb.-2012

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