Characteristics of Fresh Water Permeation in Hollow Fiber Membrane Module for Pressure Retarded Osmosis

2015 ◽  
Author(s):  
Shingo Terashima ◽  
Hidechito Hayashi ◽  
Tetsuya Okumura ◽  
Kei Matsuyama ◽  
Tetsuro Ueyama ◽  
...  
Keyword(s):  
Fresh Water ◽  
Water Flow ◽  
Flow Rate ◽  
Hollow Fiber ◽  
Hollow Fiber Membrane ◽  
Water Flow Rate ◽  
Forward Osmosis ◽  
Membrane Module ◽  
Fiber Membrane ◽  
Water Permeation

Forward Osmosis (FO) is recently paied attention to preprocessing of the Reverse Osmosis (RO). It can reduce the input power of RO plant. It is required to reduce the salt concentration at outlet and increase the permeation flow rate. In this paper, the characteristics of the fresh water flow and permeation are studied for the hollow fiber membrane module used in FO system. It is cleared that the disappearance of fresh water and the concentration polarization in hollow fiber largely influence to the reduction of permeation flow rate in the case of the low fresh water flow rate. Concentration of fresh water and the leakage of salt influence to the reduction of permeation flow rate in the case of high fresh water flow rate.

0711 Effects of fresh water flow rate on the performance of hollow fiber membrane module

2014 ◽  
Vol 2014 (0) ◽  
pp. _0711-1_-_0711-4_
Author(s):  
Shingo TERASHIMA ◽  
Hidechito HAYASHI ◽  
Tetsuya OKUMURA ◽  
Kei MATSUYAMA ◽  
Morihiro IRIE ◽  
...  
Keyword(s):  
Fresh Water ◽  
Water Flow ◽  
Flow Rate ◽  
Hollow Fiber ◽  
Hollow Fiber Membrane ◽  
Water Flow Rate ◽  
Membrane Module ◽  
Fiber Membrane

Experimental and theoretical study of a forward osmosis hollow fiber membrane module with a cross-wound configuration

2016 ◽  
Vol 504 ◽  
pp. 10-19 ◽  
Author(s):  
Masafumi Shibuya ◽  
Masahiro Yasukawa ◽  
Shohei Goda ◽  
Hidehiko Sakurai ◽  
Tomoki Takahashi ◽  
...  
Keyword(s):  
Hollow Fiber ◽  
Theoretical Study ◽  
Hollow Fiber Membrane ◽  
Forward Osmosis ◽  
Membrane Module ◽  
Fiber Membrane

Membrane vacuum stripping process for volatile organics removal from water using an asymmetric PVDF (polyvinylidene fluoride) hollow fiber membrane module

2001 ◽  
Vol 1 (5-6) ◽  
pp. 65-75
Author(s):  
D. Wang ◽  
K. Li ◽  
W.K. Teo
Keyword(s):  
Hollow Fiber ◽  
Polyvinylidene Fluoride ◽  
Hollow Fiber Membrane ◽  
Membrane Module ◽  
Solution Temperature ◽  
Permeation Flux ◽  
Fiber Membrane ◽  
Feed Concentration ◽  
Water Permeation ◽  
Phase Inversion Technique

The vacuum membrane stripping process (VMS) for removing a VOC (trichloroethylene) from water was studied in a polyvinylidene fluoride (PVDF) hollow fiber membrane module containing 187 fibers with a length of 0.59 m. The porous PVDF asymmetric hollow fiber used was prepared by the wet phase inversion technique. The feed solution containing trichloroethylene (TCE) was passed through the lumen of the PVDF hollow fiber. Vapors of TCE and water were transported through the pores of the membrane into the shell side maintained at a sub-atmospheric pressure, and condensed in cold traps. The effects of down-stream pressure, solution temperature, feed concentration, and feed flow rate on TCE removal, TCE permeation flux, water permeation flux and TCE concentration of the permeated solution, as well as the mass transfer coefficient were investigated. The down stream pressure and solution temperature were identified as the major factors to control VOC removal and TCE concentration in the permeate stream. A small amount of the permeated solution with higher TCE concentration was obtained at the temperature of 50°C and pressure of 80 mmHg when about 90% TCE was removed from the water.

scholarly journals Permeation characteristics of fresh water in hollow fiber membrane module for pressure retarded osmosis

2016 ◽  
Vol 3 (6) ◽  
pp. 16-00416-16-00416 ◽  
Author(s):  
Shingo TERASHIMA ◽  
Hidechito HAYASHI ◽  
Tetsuya OKUMURA ◽  
Tetsuro UEYAMA ◽  
Kei MATSUYAMA ◽  
...  
Keyword(s):  
Fresh Water ◽  
Hollow Fiber ◽  
Hollow Fiber Membrane ◽  
Membrane Module ◽  
Fiber Membrane ◽  
Pressure Retarded Osmosis

scholarly journals A novel method for processing adipose-derived stromal stem cells using a closed cell washing concentration device with a hollow fiber membrane module

2021 ◽  
Vol 23 (1) ◽  
Author(s):  
Shinji Hayashi ◽  
Rieko Yagi ◽  
Shuhei Taniguchi ◽  
Masami Uji ◽  
Hidaka Urano ◽  
...  
Keyword(s):  
Stem Cells ◽  
Hollow Fiber ◽  
Hollow Fiber Membrane ◽  
Membrane Module ◽  
Fiber Membrane ◽  
Cell Processing ◽  
Closed Cell ◽  
A Cell ◽  
Novel Method ◽  
Stromal Stem Cells

AbstractCell-assisted lipotransfer (CAL) is an advanced lipoinjection method that uses autologous lipotransfer with addition of a stromal vascular fraction (SVF) containing adipose-derived stromal stem cells (ASCs). The CAL procedure of manual isolation of cells from fat requires cell processing to be performed in clean environment. To isolate cells from fat without the need for a cell processing center, such as in a procedure in an operation theater, we developed a novel method for processing SVF using a closed cell washing concentration device (CCD) with a hollow fiber membrane module. The CCD consists of a sterilized closed circuit, bags and hollow fiber, semi-automatic device and the device allows removal of >99.97% of collagenase from SVF while maintaining sterility. The number of nucleated cells, ASCs and viability in SVF processed by this method were equivalent to those in SVF processed using conventional manual isolation. Our results suggest that the CCD system is as reliable as manual isolation and may also be useful for CAL. This approach will help in the development of regenerative medicine at clinics without a cell processing center.

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