TY - JOUR
T1 - Phenanthrene removal by Penicillium frequentans grown on a solid-state culture
T2 - Effect of oxygen concentration
AU - Meléndez-Estrada, J.
AU - Amezcua-Allieri, M. A.
AU - Alvarez, P. J.J.
AU - Rodríguez-Vázquez, R.
PY - 2006/10
Y1 - 2006/10
N2 - Phenanthrene removal by Penicillium frequentans was compared under aerobic and microaerophilic conditions in a solid culture amended with low quantities of an agricultural residue. An inoculum of P. frequentans grown on sugarcane bagasse pith was mixed with soil spiked with 200 mg l-1 of phenanthrene, to obtain a final bagasse/soil ratio of 1:16. The C/N ratio was adjusted to 60 and the moisture content to 40%. The oxygen concentrations were adjusted to 20%, 10%, 5%, 2% and close to 0%, in the soil-gas phase for each treatment. There were statistically significant (p<0.05) differences in the metabolic activity at different oxygen concentrations, measured as CO2 production. Phenanthrene removal rates increased with oxygen concentration, reaching 52% removal after 17 days of incubation for the treatment with 20% O2. Nevertheless, oxygen-limited (microaerophilic) conditions did not preclude phenanthrene degradation.
AB - Phenanthrene removal by Penicillium frequentans was compared under aerobic and microaerophilic conditions in a solid culture amended with low quantities of an agricultural residue. An inoculum of P. frequentans grown on sugarcane bagasse pith was mixed with soil spiked with 200 mg l-1 of phenanthrene, to obtain a final bagasse/soil ratio of 1:16. The C/N ratio was adjusted to 60 and the moisture content to 40%. The oxygen concentrations were adjusted to 20%, 10%, 5%, 2% and close to 0%, in the soil-gas phase for each treatment. There were statistically significant (p<0.05) differences in the metabolic activity at different oxygen concentrations, measured as CO2 production. Phenanthrene removal rates increased with oxygen concentration, reaching 52% removal after 17 days of incubation for the treatment with 20% O2. Nevertheless, oxygen-limited (microaerophilic) conditions did not preclude phenanthrene degradation.
KW - Oxygen concentration
KW - PAHs
KW - Penicillium frequentans
KW - Solid state-culture
KW - Sugarcane bagasse pith
UR - http://www.scopus.com/inward/record.url?scp=33751560810&partnerID=8YFLogxK
U2 - 10.1080/09593332708618720
DO - 10.1080/09593332708618720
M3 - Artículo
SN - 0959-3330
VL - 27
SP - 1073
EP - 1080
JO - Environmental Technology (United Kingdom)
JF - Environmental Technology (United Kingdom)
IS - 10
ER -