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Volume 8, Issue 9
Displaying 1-12 of 12 articles from this issue
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[in Japanese]1979 Volume 8 Issue 9 Pages 885-886
Published: September 30, 1979
Released on J-STAGE: March 18, 2010
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1979 Volume 8 Issue 9 Pages 887-889
Published: September 30, 1979
Released on J-STAGE: March 18, 2010
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Fusao Yoshida, Iori Hashimoto, Takeichiro Takamatsu1979 Volume 8 Issue 9 Pages 890-897
Published: September 30, 1979
Released on J-STAGE: March 18, 2010
JOURNAL FREE ACCESSIn this paper, we discuss the main economical barriers in implementing resource recovery systems of solid waste within the market.
Generally speaking, there are two types of barriers technical and economical. Economical, especially, institutional barriers may be more essential than the technical ones judging from the fact that the present structure of industries is fitted to the use of virgin raw and not recoverd materials.
The economic success of a recovery system depends on continuing and stable revenues derived from selling the products made from recoverd materials. Marketing barriers are related not only to the cost of the products but also the other problems hidden behind the market price. We make these hidden problems clear by showing many practical examples and by clustering these problems into two groups:
(A) barriers related to the competition principle of the market structure, and
(B) barriers related to the characteristic of solid waste.
As a result, it is shown that both nonmarket mechanical means and reformation of the current economic structure are necessary in order to comprehensively promote the resource recovery.View full abstractDownload PDF (1146K) -
[in Japanese]1979 Volume 8 Issue 9 Pages 898-900
Published: September 30, 1979
Released on J-STAGE: March 18, 2010
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[in Japanese]1979 Volume 8 Issue 9 Pages 901-915
Published: September 30, 1979
Released on J-STAGE: March 18, 2010
JOURNAL FREE ACCESSWast water discharged in the production process of Japanese cake, ice cream, and potato chips were treated first with the one stage Rotating Biological Contactor and then with series of the three stage Rotating Biological Contactor and the two stage activated sludge process.
Wast water of 1200 mg BOD /1 were treated with the Rotating Biological Contactor system- Activated Sludge Process system at the rate of 300 m3/d, and the experimental results showed that the wast water could be purified to the 4-10 mg /1 level without dilution.View full abstractDownload PDF (10587K) -
—The behaviors of NO and NH3 in NO-NH3-N2 mixture under the UV irradiation—Tsutomu Kagiya, Takashi Ogita, Hiroshi Hatta, Hisanori Kanayama1979 Volume 8 Issue 9 Pages 916-923
Published: September 30, 1979
Released on J-STAGE: March 18, 2010
JOURNAL FREE ACCESSThe behaviors of N2O, NO and NH3 in N2O-NH3-N2 and NO-NH3-N2 mixture under the UV irradiation were studied at room temprature. The decomposition rate of NH3 in NH3-N2 mixture under the UV irradiation was proportional to the concentration of NH3, and the rate under a low pressure mercury lamp irradiation was three times larger than that under a high pressure mercury lamp irradiation. No effect of NH3 and N2O was observed on the decomposition rate of N2O and NH3 under the irradiation with a low pressure mercury lamp. While N2O did not change and NH3 decomposed slowly by the irradiation with a high pressure mercury lamp, and the rate was not affected by N2O.
NO and NH3 in NO-NH3-N2 mixture decomposed rapidly with the formation of small amount of N2O as a by-product under a low pressure mercury lamp irradiation. The amount of NO decomposed was nearly equal to that of NH3, the rate of decomposition of NH3 increased with the increase of the concentration of NO, and was expressed by the following equation:
d [NH3] /dθ=k1 [NH3] +k2 [NH3] [NO] 1/2 [θ; W/F (watt⋅min⋅l-1) ]
The decomposition rate of NO in NO-NH3-N2 mixture under a low pressure mercury lamp irradiation was nearly equal to the decomposition rate of NH3, and was ten times larger than that under a high pressure mercury lamp irradiation. The yield of N2O (less than 10% of the amount of NO decomposed) increased proportionally to the amount of NH3 decomposed and the concentration of NO.View full abstractDownload PDF (827K) -
[in Japanese], [in Japanese]1979 Volume 8 Issue 9 Pages 924-932
Published: September 30, 1979
Released on J-STAGE: March 18, 2010
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[in Japanese]1979 Volume 8 Issue 9 Pages 933-938
Published: September 30, 1979
Released on J-STAGE: March 18, 2010
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[in Japanese], [in Japanese]1979 Volume 8 Issue 9 Pages 939-944
Published: September 30, 1979
Released on J-STAGE: March 18, 2010
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[in Japanese]1979 Volume 8 Issue 9 Pages 945-953
Published: September 30, 1979
Released on J-STAGE: March 18, 2010
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[in Japanese]1979 Volume 8 Issue 9 Pages 954-961
Published: September 30, 1979
Released on J-STAGE: March 18, 2010
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[in Japanese]1979 Volume 8 Issue 9 Pages 962-967
Published: September 30, 1979
Released on J-STAGE: March 18, 2010
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