Abstract
Abstract In this study, the feasibility and the treatment efficiency of treating ABS industrial wastewater by an aerated submerged membrane bioreactor (ASMBR) was investigated. Through a long-term experiment, biomass, biological oxygen demand (BOD 5 ,) chemical oxygen demand (COD), total organic carbon (TOC) and permeate flux were measured to evaluate the MBR performance. The results show that a hydraulic retention time (HRT) of 18 h leads to the highest biomass concentration, a maximum mixed liquor suspended solids (MLSS) value of approximately 35 g/L. Chemical membrane cleaning was employed twice, after 131 and 180 days of operation in the total experimental period of 204 days. The membrane bioreactor led to superior COD and BOD 5 removal in ABS wastewater compared to the conventional biological treatment.
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