TY - JOUR
T1 - Biodegradation of diphenylamine by selected microbial cultures
AU - Christodoulatos, Christos
AU - Koutsospyros, Agamemnon D.
AU - Brodman, Bruce W.
AU - Korfiatis, George P.
PY - 1997
Y1 - 1997
N2 - The degradation of diphenylamine (DPA) by pure Pseudomonas (P. cepacia, P. putida, P. resinovorans) and mixed activated sludge cultures in batch shaker flasks and bioreactor systems is described. The experiments were carried out at initial DPA concentrations in the range of 15-60 mg/1. Under the experimental conditions, all cultures were capable of degrading DPA, as a sole carbon source, at comparable rates. Addition of glucose as a co-substrate was found not to have an effect on the apparent biodegration rates. In the range of initial substrate concentrations attempted in this study, the DPA biodegradation rate was found to follow first-order kinetics. In bioreactor experiments, the biodegradation rate constant (k1) was determined to be 0.54 d-1 corresponding to a half-life (t1/2) 1.40 days. The effect of these findings on the storage stability of nitrocellulose based propellant formulations are discussed.
AB - The degradation of diphenylamine (DPA) by pure Pseudomonas (P. cepacia, P. putida, P. resinovorans) and mixed activated sludge cultures in batch shaker flasks and bioreactor systems is described. The experiments were carried out at initial DPA concentrations in the range of 15-60 mg/1. Under the experimental conditions, all cultures were capable of degrading DPA, as a sole carbon source, at comparable rates. Addition of glucose as a co-substrate was found not to have an effect on the apparent biodegration rates. In the range of initial substrate concentrations attempted in this study, the DPA biodegradation rate was found to follow first-order kinetics. In bioreactor experiments, the biodegradation rate constant (k1) was determined to be 0.54 d-1 corresponding to a half-life (t1/2) 1.40 days. The effect of these findings on the storage stability of nitrocellulose based propellant formulations are discussed.
KW - Activated Sludge
KW - Biodegradation
KW - Diphenylamine
KW - Rate Constants
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U2 - 10.1080/10934529709376525
DO - 10.1080/10934529709376525
M3 - Article
AN - SCOPUS:0346443326
SN - 1093-4529
VL - 32
SP - 15
EP - 30
JO - Journal of Environmental Science and Health - Part A Toxic/Hazardous Substances and Environmental Engineering
JF - Journal of Environmental Science and Health - Part A Toxic/Hazardous Substances and Environmental Engineering
IS - 1
ER -