Membranes coupled with physico chemical treatment in water reuse.
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.
Guo
W S
WS
Faculty of Engineering and Information Technology, University of Technology, Sydney, Broadway NSW, Australia. wguo@uts.edu.au
Zhang
R
R
Vigneswaran
S
S
Ngo
H H
HH
Kandasamy
J
J
D000327:Adsorption; D019149:Bioreactors; D003247:Conservation of Natural Resources / Q000379:methods*; D005374:Filtration / Q000295:instrumentation* / Q000379:methods; D007474:Ion Exchange; D008567:Membranes, Artificial; D013997:Time Factors; D014867:Water / Q000737:chemistry*; D018508:Water Purification / Q000295:instrumentation / Q000379:methods*
D008567:Membranes, Artificial; D014867:Water