scholarly journals An investigation of physical cleaning operations for fouling attenuation of hollow fiber membranes in drinking water treatment

2012 ◽  
Author(s):  
Nigel De Souza
Keyword(s):  
Drinking Water ◽  
Water Treatment ◽  
Hollow Fiber ◽  
Drinking Water Treatment ◽  
Hollow Fiber Membranes ◽  
Fiber Membranes

Drinking water treatment by using ultrafiltration hollow fiber membranes

Desalination ◽  
1996 ◽  
Vol 106 (1-3) ◽  
pp. 55-61 ◽  
Author(s):  
Shuji Nakatsuka ◽  
Ichiro Nakate ◽  
Tadaaki Miyano
Keyword(s):  
Drinking Water ◽  
Water Treatment ◽  
Hollow Fiber ◽  
Drinking Water Treatment ◽  
Hollow Fiber Membranes ◽  
Fiber Membranes

Constructing All Carbon Nanotube Hollow Fiber Membranes with Improved Performance in Separation and Antifouling for Water Treatment

2014 ◽  
Vol 48 (14) ◽  
pp. 8062-8068 ◽  
Author(s):  
Gaoliang Wei ◽  
Hongtao Yu ◽  
Xie Quan ◽  
Shuo Chen ◽  
Huimin Zhao ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Water Treatment ◽  
Hollow Fiber ◽  
Hollow Fiber Membranes ◽  
Fiber Membranes ◽  
Improved Performance

Development of polyethersulfone and polyacrylonitrile hollow fiber membranes for clarification of surface water and fungal enzyme broth

2013 ◽  
Vol 13 (1) ◽  
pp. 44-55 ◽  
Author(s):  
K. Praneeth ◽  
S. Kalyani ◽  
Y. V. L. Ravikumar ◽  
J. Tardio ◽  
S. Sridhar
Keyword(s):  
Water Treatment ◽  
Surface Water ◽  
Hollow Fiber ◽  
Hydraulic Pressure ◽  
Water Recovery ◽  
Hollow Fiber Membranes ◽  
Log Reduction ◽  
Surface Water Treatment ◽  
Fungal Enzyme ◽  
Fiber Membranes

Hollow fiber membranes are of great commercial interest with several applications at the forefront of research to carryout bioseparations, drinking water purification, wastewater treatment besides liquid phase separations and gaseous separations. An experimental study was carried out to synthesize hollow fiber membranes from polyethersulfone (PES) and polyacrylonitrile (PAN) polymers to fabricate modules for surface water treatment and clarification of fungal enzyme broth. Design drawings of a manual hollow fiber spinning machine and spinneret were prepared to fabricate the necessary equipment for extrusion of hollow fibers. Effect of various spinning conditions on specific macroscopic fiber properties, such as outer diameter and wall thickness and membrane pore structure was studied. Concentrations of 15–20 wt% PES in n-methylpyrrolidone (NMP) and PAN in dimethyl formamide (DMF) solvents with important additives and pore formers were prepared. These polymer solutions were extruded through the spinneret and subjected to phase inversion in a water bath. The membranes were characterized by scanning electron microscopy (SEM) and pure water flux studies. PAN and PES exhibited 99.8 and 95.4% turbidity rejection. PAN exhibited a 5 log reduction of Escherichia coli bacteria for surface water treatment at a low hydraulic pressure of 1 bar with a flux of 54.2 L/m2 h at a water recovery of 80% whereas PES gave a flux of 36.6 L/m2 h with 4 log reduction of E. coli. PAN and PES membranes exhibited 54.9 and 69.3% xylanase enzyme recoveries from fungal broth at reasonable flux with turbidity rejection of 94.8 and 95.7% respectively.

Preparation for PTFE Hollow Fiber Membranes Used in Water Treatment and Optimization for its Extrusion Process

2013 ◽  
Vol 750-752 ◽  
pp. 828-831 ◽  
Author(s):  
Chao Zhuang ◽  
Zhi Qing Luo ◽  
Wen Qing Chen
Keyword(s):  
Water Treatment ◽  
Hollow Fiber ◽  
Retention Rate ◽  
Pure Water ◽  
Water Flux ◽  
Chemical Properties ◽  
Hollow Fiber Membranes ◽  
High Fracture ◽  
Processing Methods ◽  
Fiber Membranes

For their excellent physical and chemical properties, PTFE hollow fiber membranes can be used in harsh environment of water treatment. But the membranes cannot be prepared by conventional methods, such as the melting processing methods and the dry-wet spinning processing methods, because of a high melting point of 327°C and chemical stability. In this paper a method of extrusion-stretching-sintering is used, and using this method we get the membranes with high fracture strength (10MPa) and high pure water flux (1500L/(m2*h)), also the retention rate of bovine serum albumin reaching 50%, which meets the laboratory microfiltration membrane requirements.

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