By a News Reporter-Staff News Editor at Journal of Technology -- Investigators publish new report on Desalination. According to news reporting from Shanghai, People's Republic of China, by VerticalNews journalists, research stated, "A novel hybrid process of coagulation-bubbling-ultrafiltration was proposed to study membrane fouling phenomena by surface water. Relationship of bubbles, flocs and the hollow fibers was explored."
The news correspondents obtained a quote from the research from Tongji University, "When applying less than 20 mL/min gas flow rate, membrane fouling was accelerated with air bubbles introduced. When gas flow rate increased further to 40 mL/min and 60 mL/min, TMP showed a two-stage development trend, which was a fast development in the first few hours followed with a relatively slow development after about 4 h. Unified membrane fouling index (UMFI) increased from 0.00216 (without bubbles) to 0.00274 m(2)/L (40 mL/min gas flow rate) and 0.00219 m(2)/L (60 mL/min gas flow rate). As gas flow rate increased, bubble size became bigger, and its distribution range became wider, resulting in higher shear rate in the ultrafiltration column, which led to severe floc breakage. Flocs of small size and compact structure accelerated membrane fouling, resulting in highest UMFI value under 40 mL/min gas flow rate. However, under 60 mL/min gas flow rate, with largest bubbles and highest shear rate examined in this study, concentration polarization was effectively limited."
According to the news reporters, the research concluded: "As a result, TMP development slowed down when pore blockage reached equilibrium."
For more information on this research see: Coagulation-bubbling-ultrafiltration: Effect of floc properties on the performance of the hybrid process. Desalination, 2014;333(1):126-133. Desalination can be contacted at: Elsevier Science Bv, PO Box 211, 1000 Ae Amsterdam, Netherlands. (Elsevier - www.elsevier.com; Desalination - www.elsevier.com/wps/product/cws_home/502683)
Our news journalists report that additional information may be obtained by contacting J.W. Liu, Tongji Univ, Coll Environm Sci & Engn, State Key Lab Pollut Control & Resource Reuse, Shanghai 200092, People's Republic of China. Additional authors for this research include B.C. Liu, T. Liu, Y. Bai and S.L. Yu.
Keywords for this news article include: Asia, Shanghai, Desalination, People's Republic of China
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