Biodegradation of sodium lauryl ether sulfate (SLES) by two different bacterial consortia.
Two bacterial consortia capable of degrading SLES were isolated from a wastewater treatment plant. The two consortia consisted of three members, Acinetobacter calcoacetiacus and Klebsiella oxytoca in one co-culture (A-K) and Serratia odorifera in the second co-culture (S-A), which contains Acinetobacter calcoacetiacus as well. In all experiments, cells were grown on SLES (1000-7000 ppm) containing the M9 minimal medium as sole carbon source. The co-culture A-K demonstrated a higher growth rate (0.26 h(-1)) and significant greater viability than that of the co-culture S-A (0.21 h(-1)). Glucose, sucrose, maltose, mannitol, and succinic acid as carbon sources produced the same degradation rate (approximately 100 ppm/h) and enhanced the SLES degradation rate by 3-fold upon the control (without an added carbon source). In the case of the co-culture S-A, the situation was different; all the carbon sources being tested except maltose caused a repression in the degradation ability in a range between 25-100%. Maltose causes an enhancement by almost fivefold, compared with the positive control.
Khleifat
Khaled M
KM
Department of Biology, Mutah University, Mutah , 61710, Karak, Jordan. alkh_kha@hotmail.com
D001419:Bacteria / Q000378:metabolism*; D001673:Biodegradation, Environmental; D002244:Carbon / Q000378:metabolism; D009584:Nitrogen / Q000378:metabolism; D010101:Oxygen Consumption; D012967:Sodium Dodecyl Sulfate / Q000378:metabolism*; D013501:Surface-Active Agents / Q000378:metabolism*
D013501:Surface-Active Agents; D012967:Sodium Dodecyl Sulfate; D002244:Carbon; D009584:Nitrogen