title: Influence of step increases in hydraulic retention time on (RS)-MCPP degradation using an anaerobic membrane bioreactor.
abstract: The effects of different hydraulic retention time (HRT) on (RS)-MCPP utilisation was investigated by decreasing the feed flow rate in an anaerobic membrane bioreactor (AnMBR). Results showed an average COD removal efficiency of 91.4%, 96.9% and 94.4% when the reactor was operated at HRT 3, 7 and 17 d, respectively. However, when the HRT was reduced to 1d, the COD removal efficiency declined to just only 60%, confirming the AnMBR is stable to a large transient hydraulic shock loads. The (RS)-MCPP removal efficiency fluctuated from 6% to 39% at HRT 3 d, however when it was increased to 7 and 17 d, the removal efficiency increased to an average of 60% and 74.5%. In addition, (RS)-MCPP specific utilisation rates (SUR) were dependent on the HRT and gradually improved from 18 to 43 μg mg VSS(-1) d(-1) as flow rate increased.
authors.affiliation: Department of Environmental Engineering, Faculty of Civil Engineering, Universiti Teknologi Malaysia, 81310 Skudai, Malaysia. aliyuzir@utm.my
authors.forename: Ali
authors.initials: A
authors.lastname: Yuzir
authors.forename: Shreeshivadasan
authors.initials: S
authors.lastname: Chelliapan
authors.forename: Paul J
authors.initials: PJ
authors.lastname: Sallis
mesh_terms: D000693:Anaerobiosis; D019149:Bioreactors; D002851:Chromatography, High Pressure Liquid; D008567:Membranes, Artificial; D008697:Methane / Q000096:biosynthesis
chemical_list: D008567:Membranes, Artificial; D008697:Methane