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Environmental Science and Pollution Research

, Volume 26, Issue 2, pp 1061–1071 | Cite as

Membrane scouring to control fouling under fluidization of non-adsorbing media for wastewater treatment

  • Muhammad Aslam
  • Amine Charfi
  • Jeonghwan KimEmail author
Water Industry: Water-Energy-Health Nexus

Abstract

Gas sparging is used as a traditional way to control membrane fouling in submerged membrane bioreactors (MBRs) in wastewater treatment. However, the gas sparging accounts for the largest fraction in operational cost to run the MBR systems. In this study, membrane fouling was controlled by integrating scouring media with gas sparging to reduce fouling rate at relatively low operational energy. Comparative study was performed using a fluidized membrane reactor treating synthetic feed solutions between polyethylene terephthalate (PET) scouring media (SM) fluidized by gas sparging (GS), liquid recirculation (LR), and combination of them to control membrane fouling. Addition of PET scouring media reduced the gas flow rate by 67% more with 30% less in fouling rate than gas sparing only. Combined usage of gas sparging and liquid recirculation to fluidize the PET scouring media (LR + GS + SM) showed 37% lower in fouling rate than that obtained by the scouring media fluidized by liquid recirculation (LR + SM) only through the reactor. The LR + GS + SM configuration reduced energy consumption by 90% more than that required by gas sparging alone. Mechanical cleaning driven by fluidizing PET scouring media could reduce membrane fouling due to removing deposit of inorganic particles from membrane surface effectively. However, the PET scouring media was not very effective to reduce membrane fouling caused by organic colloids which are expected to contribute pore fouling significantly.

Keywords

Membrane bioreactor Membrane fouling Energy consumption Fluidized media Mechanical membrane scouring 

Notes

Acknowledgements

This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (2014R1A1A2057877). This research was supported by Korea Research Fellowship program funded by the Ministry of Science, ICT, and Future Planning through the National Research Foundation of Korea (NRF-2015H1D3A1059895).

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Copyright information

© Springer-Verlag Berlin Heidelberg 2017

Authors and Affiliations

  1. 1.Department of Environmental EngineeringInha UniversityIncheonRepublic of Korea

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