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Volume 41 (2010)
- Issue 4 Pages 156-
- Issue 3 Pages 103-
- Issue 2 Pages 64-
- Issue 1 Pages 1-
Volume 41, Issue 3
Vol. 41, No. 3 (Ser. No. 127)
Displaying 1-3 of 3 articles from this issue
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Fei LU, Yutaka ISHIKAWA, Hiroaki KITAZAWA, Takaaki SATAKE2010 Volume 41 Issue 3 Pages 103-110
Published: 2010
Released on J-STAGE: July 07, 2023
JOURNAL OPEN ACCESSTruck transport plays an important role in the distribution of goods. Although the lab-simulated truck vibration test has been developed, the vibration wave pattern was different in different measurement condition of truck vibration. To obtain the appropriate sampling intervals condition for the consecutive measurement during truck transport, the effects of sampling intervals on truck transport vibration levels were analyzed. The vibration through the transport trip was measured consecutively in the rear platform of 20-ton loaded truck for the peach distribution from Nagano to Tokyo. The vibration data was sampled with different intervals, and was analyzed with power spectrum density (PSD). With a longer sampling interval, gap with consecutive wave patterns become bigger, and the real vibration cannot be reproduced. It was found that intermittent 60 s sample periods with 4 s and 2 s sub-recorded lengths were sufficient for reproduce local roads and highways vibration. The reason for this difference was that shocks occurred more frequently on local roads than highway.View full abstractDownload PDF (2259K) -
Fumihito MIYATAKE, Yoshiyuki ABE, Yoshifumi HONDA, Kazunori IWABUCHI, ...2010 Volume 41 Issue 3 Pages 111-117
Published: 2010
Released on J-STAGE: July 07, 2023
JOURNAL OPEN ACCESSTo clarify the characteristics of dairy cattle manure composting using various kinds of bulking agents, compost temperature, oxygen uptake rate, ammonia gas concentration and final compost quality were investigated during the composting process. Bulking agents used in this study is as follows: wallboard paper scraps, pencil shavings, carbonized cedar and zeolite. Compost temperatures in any experimental groups rose over 60 ̊C within 24 hours, showing that composting was carried out smoothly. Oxygen uptake rate of zeolite group showed the highest level of the experimental groups. This high oxygen uptake rate may result from the gas adsorption ability by zeolite in addition to oxygen consumption by microorganisms. Ammonia gas concentration of wallboard paper scraps group was about 3.6 times as high as that of dairy manure group as a control. Ammonia gas concentration of zeolite group, which was expected to show the ability of ammonia adsorption, was lower than those of the other groups until day 3 of the experiment, although the effect was not durable. Compositions of final composts depended on the kinds of bulking agents. The sulfuric content of wallboard paper scraps group was the highest of those of the others. The vital point for the utilization of bulking agents to composting is to set the composting condition such as ventilation based on the characteristics of bulking agents. In addition, it is important to comprehend the chemical composition of composts when the composts with bulking agents are applied to soil.View full abstractDownload PDF (1947K) -
Shiro KATO, Takaki YAMASHIRO, ADEKUNLE Lateef Suraju, Masahiro IWASAKI ...2010 Volume 41 Issue 3 Pages 118-123
Published: 2010
Released on J-STAGE: July 07, 2023
JOURNAL OPEN ACCESSIn this study,effective use of crude glycerin was investigated. Method included the mixing of crude glycerin with dairy waste in various percentages aiming to establish the best percentage of crude glycerin that should be mixed with dairy waste, for efficient fermentation. The mixture produced high biogas volume on fermentation which apparently indicated a high methane concentration in the biogas produced. When dairy waste was mixed with 4-6% of crude glycerin, the highest volume of methane generation could be observed. It was four times of the gas produced from dairy waste fermentation without incorporation of glycerin. From these results, it is evident that crude glycerin, which can be recycled, could be effectively used in thermophilic methane fermentation.View full abstractDownload PDF (1958K)
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