title: Anaerobic biodegradability and inhibitory effects of some anionic and cationic surfactants.
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.
authors.affiliation: Universidad Popular Autónoma del Estado de Puebla, Centro Interdisciplinario de Posgrados Investigación y Consultoría, 21 Sur 1103 Col, 72160, Santiago, Puebla, México. beatriz.perez@upaep.mx
authors.forename: Beatriz
authors.initials: B
authors.lastname: Pérez-Armendáriz
authors.forename: Yésica Mayett
authors.initials: YM
authors.lastname: Moreno
authors.forename: Oscar
authors.initials: O
authors.lastname: Monroy-Hermosillo
authors.forename: Jean Pierre
authors.initials: JP
authors.lastname: Guyot
authors.forename: Rosa O
authors.initials: RO
authors.lastname: González
mesh_terms: D000693:Anaerobiosis; D000838:Anions / Q000378:metabolism / Q000633:toxicity; D001557:Benzenesulfonates / Q000032:analysis / Q000378:metabolism* / Q000633:toxicity; D001673:Biodegradation, Environmental; D019149:Bioreactors / Q000382:microbiology; D002412:Cations / Q000378:metabolism / Q000633:toxicity; D005427:Flocculation; D008697:Methane / Q000032:analysis / Q000378:metabolism; D008744:Methylamines / Q000378:metabolism* / Q000633:toxicity; D012722:Sewage / Q000737:chemistry; D012967:Sodium Dodecyl Sulfate / Q000032:analysis / Q000378:metabolism* / Q000633:toxicity; D013501:Surface-Active Agents / Q000032:analysis / Q000378:metabolism* / Q000633:toxicity; D014865:Waste Disposal, Fluid
chemical_list: D000838:Anions; D001557:Benzenesulfonates; D002412:Cations; D008744:Methylamines; D012722:Sewage; D013501:Surface-Active Agents; D012967:Sodium Dodecyl Sulfate; C001114:dodecylbenzenesulfonic acid; D008697:Methane