Abstract
The feasibility of reclaiming an anionic surfactant-rich wastewater with a submerged membrane bioreactor was investigated in a pilot scale plant of 60 L in the frame of the FP7 BioNexGen project. The MBR was operated continuously for eight months. The effects of the HRT (from 3 to 1 d) were evaluated regarding COD and anionic surfactant removal efficiencies. At a reduced HRT of 32 h, the MBR achieved high COD and anionic surfactant removal efficiencies (83.73 and 98.13%, respectively). Considering the complexity of the wastewater processed, the MBR was very stable and achieved high organic removal efficiency at organic loading of 1.5g COD l−1 d−1 and HRT of 32 h. The evaluation of MBR potential to reduce the cytotoxicity of the investigated wastewater was studied at HRT of 32 h and OLR of 1.5g COD L−1 d−1. The toxicity bioremoval was assessed by the MTT assay on MCF-7 breast cancer cells.
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