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Hybrid MF and membrane bioreactor process applied towards water and indigo reuse from denim textile wastewater. | LitMetric

AI Article Synopsis

  • - This study explores using a microfiltration (MF)-membrane bioreactor (MBR) system to reclaim wastewater from the textile dyeing process, focusing on the removal of indigo blue dye and improving water quality.
  • The MF membrane effectively removes 100% of the dye and reduces harmful compounds like chemical oxygen demand (COD) and conductivity by 65% and 25%, respectively, while enhancing wastewater biodegradability.
  • The MBR maintains consistent performance, effectively removing 73% of COD and 100% of ammonia, producing water that meets reuse standards, with the MF and ultrafiltration (UF) membranes showing different permeability characteristics but not affecting overall removal efficiency.

Article Abstract

This work investigates the application of a microfiltration (MF)-membrane bioreactor (MBR) hybrid process for textile dyeing process wastewater reclamation. The indigo blue dye was efficiently retained by the MF membrane (100%), which allows its recovery from the concentrate stream. MF promotes 100% of colour removal, and reduces the chemical oxygen demand (COD) and conductivity by about 65% and 25%, respectively, and improves the wastewater biodegradability. MF flux decline was mostly attributed to concentration polarization and the chemical cleaning was efficient enough to recover initial hydraulic resistance. The MBR provides to be a stable process maintaining its COD and ammonia removal efficiency (73% and 100%, respectively) mostly constant throughout and producing a permeate that meets the reuse criteria for some industry activities, such as washing-off and equipment washdown. The use of an MF or ultrafiltration (UF) membrane in the MBR does not impact the MBR performance in terms of COD removal. Although the membrane of MBR-UF shows permeability lower than MBR-MF membrane, the UF membrane contributes to a more stable operation in terms of permeability.

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Source
http://dx.doi.org/10.1080/09593330.2017.1310307DOI Listing

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