Effect of temperature on the biodegradation of linear alkylbenzene sulfonate and alcohol ethoxylate
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The effect of temperature on the biodegradation of linear alkylbenzene sulfonate (LAS) and alcohol ethoxylate (AE) was evaluated using method OECD 303 A, Confirmatory test (Husmann units). The experiments were performed using an initial surfactant concentration of 10 mg/L and working temperatures of 25, 15, and 9°C, keeping the biodegradation units inside a thermostatic chamber. In all cases, the removal of both surfactants tested, LAS and AE, was higher than 90%, regardless of the temperature used in the test. We observed that longer acclimation periods were needed by the microorganisms at lower temperatures.
Key WordsActivated sludge alcohol ethoxylates biodegradation linear alkylbenzene sulfonate temperature
bismuth active substances
dissolved organic carbon
high-performance liquid chromatography
linear alkylbenzene sulfonate
methylene-blue active substances
mixed liquor suspended solids
nonobserved effect concentration
Organisation for Economic Co-operation and Development
sludge retention time
wastewater treatment plant(s)
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