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Volume 20 (1995)
- Issue 6 Pages 372-
- Issue 5 Pages 302-
- Issue 4 Pages 246-
- Issue 3 Pages 156-
- Issue 2 Pages 92-
- Issue 1 Pages 2-
Volume 20, Issue 5
Displaying 1-9 of 9 articles from this issue
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Present status and perspectives of the module developmentKazuo Yamamoto1995 Volume 20 Issue 5 Pages 302-308
Published: September 01, 1995
Released on J-STAGE: August 16, 2011
JOURNAL FREE ACCESSRecently, new types of membrane modules have been under development, esspecially beeing applied to water and wastewater treatment. This paper summarizes the outlines of their development as well as the background and the needs for technological inovation in the field of Water Environment Management and Technology. Directions of new membrane module development are also discussed and present status of full-scale application of new modules are reviewed.View full abstractDownload PDF (950K) -
Hiroyuki Yamamura, Yoshishige Fujii1995 Volume 20 Issue 5 Pages 309-315
Published: September 01, 1995
Released on J-STAGE: March 04, 2011
JOURNAL FREE ACCESSThe Advanced feed outside hollow-fiber ultrafiltration membrane prepared from specially synthesized high-molecular weight polyacrylonitrile (PAN) has been developed. The hollow-fiber possesses high physical strength and high chemical resistance. In the consequence of the pore size on the feedside skin layer of the hollow-fiber membrane being designed to be 0.01 μm, the excellent removability of accumulated solids and fouling components has been achieved. The filtration performance, which is affected by the operating conditions such as the filtration velocity, the feed water quality, physical and chemical cleaning conditions, can be maintained in good conditions. At the same time, the proper operating conditions for the hollow-fiber membrane modules are determined and kept throughout the operation.View full abstractDownload PDF (1197K) -
Masaru Uehara, Tsutomu Kakuda1995 Volume 20 Issue 5 Pages 316-327
Published: September 01, 1995
Released on J-STAGE: March 04, 2011
JOURNAL FREE ACCESSThe study of water purification comes up to the stage of improving a whole system. Membranes and membrane modules should be modified or revised for the better performance. The membrane module ⌈STERAPORE F⌋ of Mitsubishi Rayon Co., Ltd is introduced as an example of improvement of them.View full abstractDownload PDF (1230K) -
Kunio Miura, Minoru Okazaki1995 Volume 20 Issue 5 Pages 328-336
Published: September 01, 1995
Released on J-STAGE: March 04, 2011
JOURNAL FREE ACCESSMicrofiltration processes with backwash system are drawing attention to membrane separation technology.
Formerly disposable types were general in nature, but in recent years, applications of the backwash type have begun to increase in the market place. This has been due to improvements in techniques and membrane materials. In particular, “Memcor Gas Backwash System”, which excels in high backwash efficiency, is making a marked impact in the field of drinking water and tertiary treatment of sewage.View full abstractDownload PDF (1486K) -
Yoshihisa Narukami, Masahiko Shioyama1995 Volume 20 Issue 5 Pages 337-345
Published: September 01, 1995
Released on J-STAGE: March 04, 2011
JOURNAL FREE ACCESSWe have developed two systems called BIOREM and FILCERA. BIOREM is combined with activated sludge treatment system and tank submerged type ceramic membrane filtration system. Membrane modules are stacked in the aeration tank, and diffusers in the bottom are cleaning the membrane surface by circulating air bubbles.
The membrane module is bringing together multiple external pressure tubular type ceramic membrane elements of an asymmetric two layer structure. The MLSS is holded about 15, 000 mg/l, so aeration tank needs smaller volume and the system can get along without sedimation tank and outside membrane space. The system was authorized by the Minister of Construction. The 100 m3/day plant is running now to treat the domestic sewage.
FILCERA is combined with coagulation system and tank submerged type ceramic membrane filtration system for water purification. Becuse there is no need for phsical pretreatment to reduce turbidity, the system is simple and compact. Maintenance is also easy.View full abstractDownload PDF (1813K) -
Naoki Ohkuma, Masami Hotta, Yutaka Okuno1995 Volume 20 Issue 5 Pages 346-354
Published: September 01, 1995
Released on J-STAGE: March 04, 2011
JOURNAL FREE ACCESSThe rotating membrane module, which is membrane driving type modules and requires low power consumption, has been developed as a separator for high concentration activated sludge.
Biological treatment and coagulation process, combined with the separation process using this membrane module, has formed an efficient system. It was found that the rotating membrane module could be applied to not only wastewater treatment but also food processing and bioprocessing fields.View full abstractDownload PDF (1142K) -
Yukio Suezaki, Keiichi Kameyama, Hiroyuki Ichinose, Toshio Takagi1995 Volume 20 Issue 5 Pages 355-362
Published: September 01, 1995
Released on J-STAGE: March 04, 2011
JOURNAL FREE ACCESSWe gave a correct statistical mechanical description of the solubilized aggregates of solubilizates by solubilizers. We showed the following : the conventional use of the mole fraction for the translational entropy of solubilized aggregates leads unphysical result that is due to the breakdown of the conservation of degrees of freedom. By the statistical mechanics that correctly takes into account of the degrees of freedom, we obtained a correct form of the free energy of solubilized aggregates by solubilizers. The theory was applied to the quantitative analysis of the binding isotherm of the protein (Omp F) by the surfactant (octylglucoside) and obtained the reasonably good coincidence between the theory and the measured data.View full abstractDownload PDF (819K) -
Kazuo Nomura, Kouichi Yamanokuchi1995 Volume 20 Issue 5 Pages 363-367
Published: September 01, 1995
Released on J-STAGE: March 04, 2011
JOURNAL FREE ACCESSFor the perfluorocarboxylate polymer membrane-aqueous electrolyte systems, the dependence of the membrane volume on the types of counter ions was investigated. As the counter ions, alkali metal ions (Li+, Na+, K+, Rb+, Cs+) and. H+ ion were used. From the relation of the specific volume of the membrane to the water content, the volume of hydrophilic region in the membrane was estimated. For the membrane of the forms of alkali metal ions, the volume of hydrophilic region in the microheterogeneous membrane structure was found to be in the same order as for the size of the ion cluster for the perfluorosulfonated membrane. Taking into account the microheterogeneous structure of the membrane, the counter ion concentration in the membrane and the molar volume of the counter ion were calculated for each type. It was suggested that the difference in the volumes of hydrophilic region among several counter-ion types was mainly attributed to the volume behavior of counter ions in the hydrophilic region and that ionic molar volume within the membrane is nearly equal to that in the aqueous solution for types of relatively high water content.View full abstractDownload PDF (505K) -
Hidehiko Sakurai, Makoto Ohno, Morio Miyagi1995 Volume 20 Issue 5 Pages 368-369
Published: September 01, 1995
Released on J-STAGE: March 04, 2011
JOURNAL FREE ACCESSCellulose triacetate (CTA) has been applied as membrane material for hemodialysis. Substituting OH group of cellulose by acetate improves membrane biocompatibility such as complement activation and transient leukopenia. In this study, we developed high flux CTA hemodialysis membrane, by controlling spinning and phase separation conditions. This membrane shows good clinical improvement, because of its superior removal capability for low molecular weight proteins as well as for small molecules.View full abstractDownload PDF (201K)
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