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Volume 36, Issue 11
Displaying 1-9 of 9 articles from this issue
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Makoto Hiraoka1982 Volume 36 Issue 11 Pages 1029-1039
Published: November 01, 1982
Released on J-STAGE: November 19, 2009
JOURNAL FREE ACCESSThe amount of consumption of waste paper has reached 42% of the raw materials for paper making and due to that the great contribution has been made to energy saving.
The use of waste paper as raw materials has expanded from paper board and toilet paper to writing paper, printing paper and others.
Under such condition, each system has been developed according to the strong demands for clean waste paper pulp.
It presentated about the trends of various systems for phased pre-slushing and pre-deflaking, pre-screening and cleaning, high concentration of pulp consistency and others to get the clean pulp with a little energy consumption.
Also presentated about thermal insulation of fiber, plastic fiber board and fuel pellets be sides paper making materials as other way of utillization of waste paper for energy saving.View full abstractDownload PDF (1380K) -
Norio Sakurai1982 Volume 36 Issue 11 Pages 1040-1053
Published: November 01, 1982
Released on J-STAGE: November 19, 2009
JOURNAL FREE ACCESSIf Shnwa 40s may be called “the period of overseas resources development” in view of activities to fill up shortage of domestic supply, can't Showa 50s be called “the period of domestic resources redevelopment” ?View full abstractDownload PDF (2331K) -
Hiroshi Tsuchiya1982 Volume 36 Issue 11 Pages 1054-1059
Published: November 01, 1982
Released on J-STAGE: November 19, 2009
JOURNAL FREE ACCESSA short lecture on the simulation method for paper making process was held by Dr. Louis Edwards, Chemical Engeneering Dept., Univ. Idaho, on 8 th. July. Dr. L. Edwards has developed the simulation model for mass and energy balance applicable to pulp and paper process, known all over the world as GEMS, the acronym for General Energy and Material Balances System. This is a report on the lecture introducing some applications of GEMS to the process.View full abstractDownload PDF (794K) -
Edogawa Mill, Honshu Paper Co., Ltd.Honshu Paper Co. Ltd.1982 Volume 36 Issue 11 Pages 1060-1070_1
Published: November 01, 1982
Released on J-STAGE: November 19, 2009
JOURNAL FREE ACCESSEdogawa Mill is located in the southeastern part of Metropolitan Tokyo along the Edogawa River which divides the border of Tokyo and Chiba Prefecture. Edogawa River is very significant for Edogawa Mill because its water is used not only as industrial water for Edogawa Mill, but is also used as a means of transportation of major materials such as pulp, oil and so on.
The main equipment in Edogawa Mill are a 60 t/d CGP plant, 2 fourdrinier machines for manufacturing 120 tons per day of printing paper, and 1 high-speed ultraformer machine for manufacturing 270 tons of paperboard per day.
The mill area has about 157, 000 m2 and a corrugating plant and a Central Research Laboratory are also located within its premises. There are a total of 471 employees working there.
Since the mill is located in the urban area, it is advantageous for procurement of materials and for transportation of products, however, on the other hand, strict control for the protection of the environment is required. Therfore, for the purpose of keeping good harmony with the community, we have positively invested in facilities for pollution abatement during the past several years.View full abstractDownload PDF (2401K) -
Kenji Kanazawa, Hiroshi Ohi, Minoru Hayashida, Shoji Ozawa, Shuji Hoso ...1982 Volume 36 Issue 11 Pages 1071-1079
Published: November 01, 1982
Released on J-STAGE: November 19, 2009
JOURNAL FREE ACCESSThis paper deals with the identification of low molecular weight compounds in spent chlorination liquor of kraft pulp, and the evaluation of acute toxicities of various bleaching effluents and their components. Thiolignin and holocellulose were used as the model substance of unbleached kraft pulp components.
The results are as follows :
1) The major components in spent chlorination liquor of thiolignin were oxalic acid and chloro-aliphatic acids.
2) Dichloromaleic acid and trichloroacetic acid were newly identified in spent chlorination liquors. These are originated from lignin in unbleached kraft pulp.
3) In the chlorination stage chloro-organic compounds are not originated from carbohydrate. The major components in spent chlorination liquor of holocellulose are glycolic acid and glyceric acid.
4) The toxicity of each spent liquor to Himedaka (Oryzias latipes) is in the increasing order of AP liquor (spent alkaline extraction liquor of chlorinated pulp), AL liquor (spent alkaline extraction liquor of chlorinated lignin), CL liquor (spent chlorination liquor of thiolignin), and CP liquor (spent chlorination liquor of kraft pulp).
5) Aliphatic acids, except chloromaleic acid and chlorofumaric acid, in spent chlorination liquors showed no toxicity. They are hardly responsible for the toxicity of bleaching effluents.View full abstractDownload PDF (854K) -
Behaviors of Carboxymethylated Carbohydrate and Lignin toward Hot Water TreatmentLam Thi Bach Tuyet, Atsushi Ishizu, Junzo Nakano1982 Volume 36 Issue 11 Pages 1080-1084
Published: November 01, 1982
Released on J-STAGE: February 22, 2010
JOURNAL FREE ACCESSThe water-insoluble fraction (I1) of carboxymethylated refiner mechanical pulp (Fig. 1) could be dissolved by hot water treatment in an autoclave. The extents of dissolution of carbohydrates and lignin increased with the increase of heating temperature and time, and with the decrease of pH (Fig. 2, 3 and 4).
Molecular weight distribution of carbohydrates and lignin dissolved by hot water treatment at 150°C were measured by the use of gel filtration. The carboxymethylated carbohydrates (CM-carbohydrates) were obviously hydrolyzed during the heating process, while a large portion of dissolved lignin remained almost unchanged in high molecular weight fractions (Fig. 5). The existence of carboxymethylated lignin, which is insoluble in water, in high molcecular weight fractions suggests that this part of lignin might be linked to carbohydrates. The hot water treatment at 170°C resulted in remarkable hydrolysis of lignin (Fig. 6). Thus it may be concluded that the dissolution of CM-carbohydrates by hot water treatment is caused by hydrolysis of lignin, which prevents the dissolution of CM-carbohydrates, as well as by the hydrolysis of CM-carbohydrates themselves.View full abstractDownload PDF (644K) -
Toranosuke Imai, Toshio Oyama, Soji Fujii1982 Volume 36 Issue 11 Pages 1085-1092
Published: November 01, 1982
Released on J-STAGE: November 19, 2009
JOURNAL FREE ACCESSA deodoring process utilizing activated sludge has been studied to treat malodorous effluent from sulphate pulping plant. In the study, vacuum evaporator condensate was selected as a malodorous effluent.
Steam stripping is generally employed to deodor malodorous effluent. Since such effluent usually has high BOD, it would be beneficial if a process which can eliminate both odor and BOD together is developed. Activated sludge provides a such possibility and will be more advantageous than other process, e. g. steam stripping, from energy-saving point of view.
Present study has been carried out in a commercial pulping plant. By optimizing operational parameters, it was found possible to deodor the effluent as well as to eliminate at least 90% of TRS and BOD.View full abstractDownload PDF (877K) -
1982 Volume 36 Issue 11 Pages 1093-1097
Published: November 01, 1982
Released on J-STAGE: November 19, 2009
JOURNAL FREE ACCESSDownload PDF (789K) -
1982 Volume 36 Issue 11 Pages 1098
Published: November 01, 1982
Released on J-STAGE: November 19, 2009
JOURNAL FREE ACCESSDownload PDF (105K)
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