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  • Title: Anaerobic biodegradability and inhibitory effects of some anionic and cationic surfactants.
    Author: Pérez-Armendáriz B, Moreno YM, Monroy-Hermosillo O, Guyot JP, González RO.
    Journal: Bull Environ Contam Toxicol; 2010 Sep; 85(3):269-73. PubMed ID: 20686749.
    Abstract:
    The anaerobic biodegradability and inhibitory effects on the methane production of three different surfactants, two anionic: sodium lauryl sulfate (SLS) and sodium dodecylbenzene sulfonate (SDBS), and a cationic surfactant: trialkyl-methylammonium chloride (TMAC), were evaluated with two different anaerobic sludges, granular and flocculent. Five different concentrations of the surfactants, 5, 50, 100, 250 and 500 mg/L, were tested. SLS was biodegraded at concentrations of 5, 50 and 100 mg/L with flocculent sludge and at 100 and 250 mg/L with granular sludge. However an inhibitory effect on methane production was observed in both sludges at 500 mg/L. The results indicate that SDBS was not biodegradable under anoxic conditions. TMAC was slightly degraded 50 and 100 mg/L with the flocculent sludge, and from 100 to 500 mg/L with the granular sludge.
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