Continuous degradation of mixtures of 4-nitrobenzoate and 4-aminobenzoate by immobilized cells of Burkholderia cepacia strain PB4. Export

@article{citeulike:504091, abstract = {Although isolated on 4-aminobenzoate, Burkholderia cepacia strain PB4 is also able to grow on 4-nitrobenzoate. Degradation of an equimolar mixture of the nitroaromatic compound 4-nitrobenzoate and its corresponding aminoaromatic derivative 4-aminobenzoate by this strain was investigated. Batch experiments showed that, irrespective of preculturing conditions, both compounds were degraded simultaneously. The mixture-degrading ability of B. cepacia strain PB4 was subsequently tested in continuous packed bed reactors (PBR) with the strain immobilized on Celite grade R-633 or R-635. Higher degradation rates were achieved with the larger particles of Celite R-635. Maximum simultaneous degradation rates per liter of packed bed of 0.925 mmol 1(-1) h(-1) 4-nitrobenzoate and 4-aminobenzoate were obtained for an applied loading rate of the same value (0.925 mmol 1(-1) h(-1) of each compound). Even when the applied load was not removed in its entirety, neither of the two compounds was degraded preferentially but a percentage of both of them was mineralized. The present study shows the possibility for a pure strain to biodegrade not only a nitroaromatic compound (4-nitrobenzoate) but also its corresponding amino derivative (4-aminobenzoate) continuously and simultaneously.}, address = {Unit of Bioengineering, Catholic University of Louvain, Belgium.}, author = {Peres, C. M. and Van Aken, B. and Naveau, H. and Agathos, S. N.}, citeulike-article-id = {504091}, citeulike-linkout-0 = {http://view.ncbi.nlm.nih.gov/pubmed/10610092}, citeulike-linkout-1 = {http://www.hubmed.org/display.cgi?uids=10610092}, issn = {0175-7598}, journal = {Appl Microbiol Biotechnol}, keywords = {aromatic-amines, aromatic-nitro, bio-degradation}, month = {September}, number = {3}, pages = {440--445}, posted-at = {2006-02-13 14:32:06}, priority = {2}, title = {Continuous degradation of mixtures of 4-nitrobenzoate and 4-aminobenzoate by immobilized cells of Burkholderia cepacia strain PB4.}, url = {http://view.ncbi.nlm.nih.gov/pubmed/10610092}, volume = {52}, year = {1999} }

TY - JOUR ID - citeulike:504091 L3 - citeulike-article-id:504091 N2 - Although isolated on 4-aminobenzoate, Burkholderia cepacia strain PB4 is also able to grow on 4-nitrobenzoate. Degradation of an equimolar mixture of the nitroaromatic compound 4-nitrobenzoate and its corresponding aminoaromatic derivative 4-aminobenzoate by this strain was investigated. Batch experiments showed that, irrespective of preculturing conditions, both compounds were degraded simultaneously. The mixture-degrading ability of B. cepacia strain PB4 was subsequently tested in continuous packed bed reactors (PBR) with the strain immobilized on Celite grade R-633 or R-635. Higher degradation rates were achieved with the larger particles of Celite R-635. Maximum simultaneous degradation rates per liter of packed bed of 0.925 mmol 1(-1) h(-1) 4-nitrobenzoate and 4-aminobenzoate were obtained for an applied loading rate of the same value (0.925 mmol 1(-1) h(-1) of each compound). Even when the applied load was not removed in its entirety, neither of the two compounds was degraded preferentially but a percentage of both of them was mineralized. The present study shows the possibility for a pure strain to biodegrade not only a nitroaromatic compound (4-nitrobenzoate) but also its corresponding amino derivative (4-aminobenzoate) continuously and simultaneously. IS - 3 JF - Appl Microbiol Biotechnol SN - 0175-7598 AD - Unit of Bioengineering, Catholic University of Louvain, Belgium. EP - 445 TI - Continuous degradation of mixtures of 4-nitrobenzoate and 4-aminobenzoate by immobilized cells of Burkholderia cepacia strain PB4. VL - 52 SP - 440 KW - aromatic-amines KW - aromatic-nitro KW - bio-degradation AU - Peres, CM AU - Van Aken, B AU - Naveau, H AU - Agathos, SN PY - 1999/09// UR - http://view.ncbi.nlm.nih.gov/pubmed/10610092 ER -