All issues
Volume 26 (2001)
- Issue 6 Pages 236-
- Issue 5 Pages 194-
- Issue 4 Pages 164-
- Issue 3 Pages 110-
- Issue 2 Pages 66-
- Issue 1 Pages 2-
Volume 26, Issue 5
Displaying 1-7 of 7 articles from this issue
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Shin-ichi Nakao2001 Volume 26 Issue 5 Pages 194-198
Published: September 01, 2001
Released on J-STAGE: March 04, 2011
JOURNAL FREE ACCESSWater-shortage will be the largest problem in 21st century, especially in big cities. Population growth will be limited based on amount of usable water. There are two ways to get water resource. One is development of new water resource, such as sea water desalination, and the other is water reuse. New water utilization system with membrane technology is proposed. For tap-water production, membrane separation is used to make water only for cooking (kitchen use) and drinking, and for other purposes such as laundry and bath use, the conventional treatment with flocculation, sedimentation and sand filtration is enough to obtain water quality for these purposes. Waste water from laundry and bath use should be treated by activated sludge with membrane, and the treated water should be reused for toilet. The membrane technology is essential in this system. Development of membrane modules and operation mode for this system will be necessary.View full abstractDownload PDF (566K) -
Shigeki Sawada2001 Volume 26 Issue 5 Pages 199-206
Published: September 01, 2001
Released on J-STAGE: March 04, 2011
JOURNAL FREE ACCESSIn recent years, membrane filtration systems are installed more actively in the field of small waterworks to remove particles and microorganisms. However, membrane fouling still remains an important issue in many applications of membrane filtration. In order to suppress membrane fouling, a new process which combines the conventional membrane filtration process with an advanced ozone treatment was studied. The results of the study demonstrates that the membrane filtration coupled with ozonation is an efficient method for suppressing organic fouling arising from eutrophic surface water.View full abstractDownload PDF (898K) -
Naoki Ohkuma2001 Volume 26 Issue 5 Pages 207-215
Published: September 01, 2001
Released on J-STAGE: March 04, 2011
JOURNAL FREE ACCESSBy changing the conventional settling separation method for activated sludge process to membrane separation method, the membrane bioreactor for wastewater treatment has created a new field in wastewater treatment. Features of this method include smaller reactor tank, shorter processing time and improved treated water quality. Systems that incorporate the membrane bioreactor are applicable to industrial wastewater treatment as well as various water treatment lines suitable to biological processes. Now, application of this method to sewage treatment is being studied widely. Furthermore, a hybrid type bioreactor treatment combined with absorption treatment is also being proposed and future development can be expected.View full abstractDownload PDF (1632K) -
Takuya Onitsuka, Koji Ueno, Kazuaki Sugimoto2001 Volume 26 Issue 5 Pages 216-220
Published: September 01, 2001
Released on J-STAGE: March 04, 2011
JOURNAL FREE ACCESSThe promotion of sewage water reuse has been expected increasingly from the point of the effective use of water resources. The reused waters have been used in various kind of purposes such as environmental water, flush water and cleaning water. Membrane filtration techniques has been expected in improving reused water quality.
For the purpose of the reused water production, we have studied ozone-microfiltration system. High ozone resistance membrane module using polyvinylidenefluoride hollow fiber was applied to microfiltration. By this reused water production system, the high quality reused water can be obtained with low production cost.View full abstractDownload PDF (663K) -
Mutsuo Kawasaki, Itirou Kawada, Masahiko Hirose, Tomomi Ohara, Atsushi ...2001 Volume 26 Issue 5 Pages 221-227
Published: September 01, 2001
Released on J-STAGE: March 04, 2011
JOURNAL FREE ACCESSThe cohesion sand filtration is usually done as the pretreatment for the sea water desalination.Recently, the sea water pretreatment by various MF membranes and the OF membranes has been developed as an alternative technology of the cohesion sand filtration. This report describes the sea water processing experiment by the MF membranes (polyethylene, polypropylene, polyacrylonitrile) of follow fiber type and the OF membranes (cellulose acetate, polysulfone) of the spiral type. Furthermore, the experiments on the RO sea water desalination using sea water pretreated by a spiral type membrane.View full abstractDownload PDF (1122K) -
Yoshiko Kondo, Masakazu Yoshikawa2001 Volume 26 Issue 5 Pages 228-230
Published: September 01, 2001
Released on J-STAGE: March 04, 2011
JOURNAL FREE ACCESSEgg shell membranes showed potential to separate racemic amino acid and racemic amino acid derivative by electrodialysis. In the present study, L-Glu, Ac-L-Trp, and D-Lys were preferentially transported through egg shell membranes from corresponding racemic mixtures. Permselectivity toward L-Glu reached 2.9.View full abstractDownload PDF (263K) -
Takeharu Inoue, Mutsuo Murakami, Yoshinari Fusaoka2001 Volume 26 Issue 5 Pages 231-233
Published: September 01, 2001
Released on J-STAGE: March 04, 2011
JOURNAL FREE ACCESSNew NF membranes designated DKL-3000X and DKL-4000X have been developed. These membranes have excellent water permeability and separation performance at super ultra-low-pressure such as 0.3MPa. Separation performance of pesticides and humic acid through DKL-3000X and DKL-4000X membrane is compared to conventional ultra-low-pressure RO membrane (UTC-70U) and nanofiltration membrane (UTC-60). The water flux of DKL-4000X is higher than that of UTC-60 membrane and extremely higher than that of UTC-70U membrane.
Application of these new NF membranes for drinking water production or pretreatment of seawater desalination has been expected.View full abstractDownload PDF (438K)
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