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Volume 34, Issue 9
Displaying 1-8 of 8 articles from this issue
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Joseph M. Genco, John J. Carbonells1980 Volume 34 Issue 9 Pages 58-61
Published: September 01, 1980
Released on J-STAGE: November 16, 2009
JOURNAL FREE ACCESS -
Fumiaki Sasaki1980 Volume 34 Issue 9 Pages 593-603
Published: September 01, 1980
Released on J-STAGE: November 16, 2009
JOURNAL FREE ACCESSThe environmental regulation is getting strict today, and the effluent treatment is accordingly required to be strengthened in Japan. This requirement, therefore, makes sludge increase in volume and also difficult to be dewatered in quality. We developed the Steam-Heating Type Screw-Press. By this Screw-Press, we could get more effective and economical dewatering of coagulating sedimentation sludge or activated sludge.View full abstractDownload PDF (3433K) -
I. K. Birtwell, R. M. Harbo1980 Volume 34 Issue 9 Pages 604-608
Published: September 01, 1980
Released on J-STAGE: April 23, 2010
JOURNAL FREE ACCESSThe discharge of pulp and paper mill effluent into the Somass estuary, Port Alberni, did not significantly affect nearshore utilization by juvenile chinook salmon. However, major changes occured in the diet of fish captured close to the discharge. In-situ bioassays, preference-avoidance experiments and gill net data revealed that salmonids could only utilize the estuarine surface waters and not the deeper waters containing low levels of dissolved oxygen. At Port Mellon, the discharge of pulp mill effluent affected the use of nearshore areas by fish. In-situ experimentation determined that the surface waters proximal to the pulp mill outfalls were acutely toxic to juvenile salmonids which effected avoidance reactions.View full abstractDownload PDF (645K) -
[in Japanese]1980 Volume 34 Issue 9 Pages 609
Published: September 01, 1980
Released on J-STAGE: November 16, 2009
JOURNAL FREE ACCESSDownload PDF (115K) -
Nichinan Mill, Oji Paper Co., Ltd.Oji Paper Co. Ltd.1980 Volume 34 Issue 9 Pages 610-620
Published: September 01, 1980
Released on J-STAGE: February 09, 2010
JOURNAL FREE ACCESSNichinan Mill of Oji Paper Co., Ltd. in Kyushu Island, which started its operation in 1938, has an integrated fine paper and a special coated paper mill. The paper mill manufactures wood-free printing and writing papers, converting stocks, business form papers and specialties. The special coated paper mill manufactures electrostatic, dipole, and heat-sensitive recording papers and heat sealable papers.
The paper mill has a capacity of 200, 000 T/Y of fine paper with seven paper machines, supported by two KP lines, and the special coated paper mill has a capacity of 3, 600 T/Y with two functional coaters.
The mill's waste water is treated by an activated sludge and coagulation-sedimentation process. Stack gas from oil-fired boiler is desulfurized. Odor gas from KP mill is burned by recovery boilors and kilns.View full abstractDownload PDF (19827K) -
The Oxidation Reaction and the Substitution Reaction in Chlorine TreatmentsKoichi Tahei, Yoshihiro Kaneko, Takeshi Akiyama, Takeo Ueno1980 Volume 34 Issue 9 Pages 621-628
Published: September 01, 1980
Released on J-STAGE: November 16, 2009
JOURNAL FREE ACCESSWe were studied on the role of the oxidation reaction and the substitution reaction in chlorine treatments in CEHED pulp bleaching sequence by varying intentionally the proportion of the oxidation reaction and the substitution reaction under a giving chlorine consumption. Increasing the proportion of the oxidation in a giving chlorine consumption, pulp viscosity after CE treatments decreased.
However, PN after CE treatments also decreased, Cl2 requirement for giving a fixed PN by CE treatments could be reduced without a damage in the pulp properties.
Accordingly, it was proved that the oxidation reaction, which was previously considered as an undesirable reaction, made an important role to the delignification, and rather a requisite reaction.
Because this advantage of the oxidation reaction were kept in all stages of this bleaching sequence, costs of bleaching were reduced by increasing the proportion of the oxidation reaction. Furthermore, properties and the treatability of bleaching effluents were nearly equal to that in the high proportion of the substitution reaction.View full abstractDownload PDF (777K) -
Pulping by the Neutral Sulfite Semichemicaland Bisulfite ProcessesKuninori Usaimi, Kinji Shimada, Atsumi Nishida1980 Volume 34 Issue 9 Pages 629-634
Published: September 01, 1980
Released on J-STAGE: November 16, 2009
JOURNAL FREE ACCESSBisulfite pulping and neutral sulfite semichemical pulping of Giant Leucaena wood were investigated.
The results of pulping tests under various conditions are shown in Table 1, 2, 3. The pulps obtained from the two processes had a higher yield, residual lignin contents and lower brightness than the pulps from beech wood.
The strength properties of the pulps, however, showed a similar tendency, except for tearing resistance, in comparison with that of beech pulps.
The colour of the sheets appeared to be yellow. The colour reversion of bleached bisulfite pulps ranged from 1.5 to 1.8 showed remarkably low values compared with that of kraft pulps.View full abstractDownload PDF (517K) -
Hiroshi Hara1980 Volume 34 Issue 9 Pages 635-649
Published: September 01, 1980
Released on J-STAGE: November 16, 2009
JOURNAL FREE ACCESSPapermaking non-woody fibrous materials from China, such as Ronsuso (Lóngxú. Cao, Eulaliopsis), Bokan (Wáng Gang Miscanthus), bamboo, sheath of bamboo shoot, wheat straw and jute were studied by means of optical microscopy to evaluate dimensions of their fibres and other cells, as well as structures of their stems or leaves.
It was found that above monocotyledon plants, that is, five samples except jute, possessed some similarity in anatomy of the stem or leaves and their element cells. However, these tissue elements were characteristic both in dimension and shape. The other hand, the bast of jute consisted of only bast fibres and phloem parenchymatous cells, the former of which varied characteristically from those of flax and hemp.View full abstractDownload PDF (27048K)
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