Membranes coupled with physico chemical treatment in water reuse

Water Sci Technol. 2010;61(2):513-9. doi: 10.2166/wst.2010.843.

Abstract

In this study, short-term experiments were conducted with different configurations of membrane hybrid systems to treat biological treated sewage effluent containing refractory organic pollutants: (i) submerged hollow fiber microfiltration (SMF) alone; (ii) spiral flocculator (SF)-SMF without settling; (iii) SF-PAC-SMF without settling and (iv) SMF with magnetic ion exchange resin MIEX pretreatment. The results indicated that the pre-flocculation of SF could improve the mitigation of membrane fouling significantly even when the system was operated at a high membrane filtration rate. The transmembrane pressure (TMP) of SF-PAC-SMF only increased marginally (0.8 kPa over 8 hours). SF-SMF without the addition of powdered activated carbon (PAC) also took a relatively long duration for the TMP to increase. The TMP only increased by 2.5 kPa over 8 hours. The SF-PAC-MF system resulted in a high dissolved organic carbon (DOC) removal of more than 96%. When used as pre-treatment to submerged membranes, the fluidized bed MIEX contactor could remove a significant amount of organic matter in wastewater. This pre-treatment helped to reduce the membrane fouling and kept the TMP low during the membrane operation.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adsorption
  • Bioreactors
  • Conservation of Natural Resources / methods*
  • Filtration / instrumentation*
  • Filtration / methods
  • Ion Exchange
  • Membranes, Artificial*
  • Time Factors
  • Water / chemistry*
  • Water Purification / instrumentation
  • Water Purification / methods*

Substances

  • Membranes, Artificial
  • Water