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- W1964518084 abstract "This work focuses on development of robust but economical hollow fiber ultrafiltration systems that could be operated with or without electric power to treat polluted surface water. A diverse experimental study was carried out to synthesize novel hollow fiber membranes based on polyphenylsulfone (PPSu) and polyvinylidenefluoride (PVDF) fibers for surface water treatment. A manual hollow fiber spinning machine incorporated with an inexpensive spinneret was designed to fabricate hollow fibers from dope compositions of 20 wt% PVDF in DMAc and 20 wt% PPSu in NMP by phase inversion technique. Isothermal ternary phase diagrams of PVDF or PPSu/solvent/non-solvent systems were established using three different solvents such as N,N-dimethylacetamide (DMAc), 1-methyl-2-pyrrolidinone (NMP) and N,N-dimethylformamide (DMF) with water being the non-solvent. The indigenous fibers had an approximate outer diameter of 1.5 mm and the wall thickness of 0.25 mm and were housed in inexpensive PVC and UPVC tubes using epoxy resin and nylon end connectors. PVDF hollow fibers (HF) exhibited 94.8% turbidity rejection, whereas PPSu fibers exhibited 91% rejection with 5 log E-Coliform reduction from surface water at a low hydraulic pressure of 1 bar with high flux values of 125 L m−2 h−1 and 73 L m−2 h−1, respectively at a substantial water recovery of 80%. A water purification device capable of generating 25 L h−1 purified water flow at an overhead tank pressure of 0.5 bar was designed and fabricated for households along with a hand pump operated submerged ultrafiltration (UF) system for treatment of surface water in flood prone regions. Detailed economic estimation of the indigenously designed water purification device for household purpose is presented which shows a low operating cost of 0.02 US $ per liter of purified water obtained." @default.
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- W1964518084 date "2014-07-01" @default.
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- W1964518084 title "Design of novel ultrafiltration systems based on robust polyphenylsulfone hollow fiber membranes for treatment of contaminated surface water" @default.
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- W1964518084 doi "https://doi.org/10.1016/j.cej.2014.02.087" @default.
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