Abstract
Aerobic biodegradation of linear alkylbenzene sulfonate (LAS) by LAS-utilizing bacteria (LUB) in the presence of other sources of carbon (glucose and soluble starch) was examined. Biodegradation of LAS was monitored as primary degradation in terms of half-life (t½) of the surfactant. Biodegradation of LAS by the individual LUB was slower in the presence of Glucose. Biodegradation of the surfactant by the various consortia of LUB was slower in the presence of the carbon sources: t½ increased to 3 days. The rates of biodegradation by the consortia can be ranked as: four-membered (t½=9 days) > three-membered (t½=9 to 13 days) > two-membered consortia (t½=10 to 15 days). Generally, degradation in the presence of the carbon sources was faster with the consortia than the individual species. Degradation of the surfactant by the LUB was generally fastest in the absence of additional carbon sources. The possible role of additional carbon sources in persistence of surfactant in water bodies and the application of the observation in management of LAS-containing-effluent is suggested.
Highlights
Aerobic biodegradation of linear alkylben- Ultimate degradation is the cleavage of the Licensee PAGEPress, Italy zene sulfonate (LAS) by LAS-utilizing bacteria aromatic ring and complete conversion of LAS Journal of Xenobiotics 2011; 1:e2 (LUB) in the presence of other sources of car- and SPCs to water, CO2, inorganic sulphates doi:10.4081/xeno.2011.e2
Biodegradation of the surfactant by o the various consortia of LUB was slower in the e presence of the carbon sources: t1⁄2 increased s to 3 days
Alkylbenzene sulfonate (ABS) was subsequently banned and gradually Alcaligenes odorans, Citrobacter diversus, The effect of the additional carbon sources replaced in the 1960s by linear alkylbenzene Micrococcus luteus and Pseudomomas putida on the degradation of the surfactant by the sulfonate (LAS), which is readily biodegrad- previously isolated from detergent-effluent pol- organisms is shown on Figures 1-3
Summary
Aerobic biodegradation of linear alkylben- Ultimate degradation is the cleavage of the Licensee PAGEPress, Italy zene sulfonate (LAS) by LAS-utilizing bacteria aromatic ring and complete conversion of LAS Journal of Xenobiotics 2011; 1:e2. Biodegradation of the surfactant by o the various consortia of LUB was slower in the e presence of the carbon sources: t1⁄2 increased s to 3 days. Degradation of the surfactant by the LUB was generally e fastest in the absence of additional carbon sources.
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