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Volume 24 (1993 - 199･･･
- Issue 4 Pages 191-
- Issue 3 Pages 133-
- Issue 2 Pages 57-
- Issue 1 Pages 1-
Volume 24, Issue 2
Displaying 1-7 of 7 articles from this issue
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Simulation of The Receiving ProcessYan HUA, Toshio KONAKA, Tomoyuki SENO1993 Volume 24 Issue 2 Pages 57-64
Published: September 20, 1993
Released on J-STAGE: September 05, 2011
JOURNAL FREE ACCESSIn order to establish a supporting system for the operation and management of paddy drying and processing facilities, it is necessary to check and specify the receiving conditions. In this study, the receiving process was simulated with the use of the queuing theory model based on the data collected from the in-situ operations. The optimized receiving conditions were determined by the analyses of the results of receiving conditions on the receiving process.View full abstractDownload PDF (911K) -
Prediction of air flow rate and resistance of air flowShoji TAHARAZAKO, Kazuo MORITA, Chang Le WEI, Satoru AKADA1993 Volume 24 Issue 2 Pages 65-70
Published: September 20, 1993
Released on J-STAGE: September 05, 2011
JOURNAL FREE ACCESSThe concept of this study is to obtain optimum drying condition of the multiple bin dryer with a single fan. The purpose is to estimate the air flow rates in each bin on various ventilating condition, in order to dry grain by safe and efficient method.
In this paper, when the volume of bulk rough rice in each bin could be estimated, the static pressure at plenum chamber with multiple bins was estimated and the air flow rates in each bin were computed. Relationship among the static pressure at plenum chamber, PT, the sedimentary depth of bulk rough rice, Li, and the resistance of air flow, ΔP, was investigated and, relationship between the moisture content, Mi, and the apparent density, di, was also obtained. The empirical equations for the prediction of the ventilating condition were derived from these results. Consequently, it was shown that the limits of air flow rate and volume of rough rice in each bin were could be predicted by the computed simulation using these equations.
In part 2, total resistance of air flow are measured under the conditions of different sedimentary depth of rough rice and various ventilating area. It shows that the estimated value is consistent with the measured value, and the prediction with computed simulation could be applied to the actual operation of the multiple bin dryer.View full abstractDownload PDF (675K) -
Comparison of estimated value and measuring value of air flow rateChang Le WEI, Shoji TAHARAZAKO, Kazuo MORITA, Satoru AKADA1993 Volume 24 Issue 2 Pages 71-76
Published: September 20, 1993
Released on J-STAGE: September 05, 2011
JOURNAL FREE ACCESSThe purpose of this study is to obtain optimum drying condition of the multiple bin dryer with a single fan.
In this paper, the total resistance of air flow and air flow rate in each bin were measured with various ventilating conditions, such as different ventilating area and volume of rough rice in each bin. It showed that the estimated values using computed simulation were consistent with the measured values. Moreover, the limits of air flow rate in each bin with different sedimentary depth of rough rice were estimated and the optimum ventilating area was computed at maximum efficiency of a fan. It was obvious that these estimations were applied to the actual operation of the multiple bin dryer.View full abstractDownload PDF (651K) -
Naoya FUKUDA, Hideo IKEDA, Makoto NARA1993 Volume 24 Issue 2 Pages 77-84
Published: September 20, 1993
Released on J-STAGE: September 05, 2011
JOURNAL FREE ACCESSTo study effects of light quality on the growth of plants, lettuce and spinach were grown for 15 days by water culture in the growth cabinet in which white, red, yellow, green and blue lamps were used as artificial light sources and two levels of light intensities were maintained at 250 and 125μmol·m-2·s-1 in photosynthetic photon flux density (PPFD).
When lettuce were grown under high light intensity, leaf burning occurred under green light 3 to 4 days after treatment. Spinach, however, did not show such a injury. Both crops grown under red and yellow light showed downward curling of the leaf lamina until 5 to 6 days after treatment. The top dry weight of lettuce plant grown under yellow, green and blue light of high or low light intensity was 20 to 30% lower than that grown under white. Under high light intensity, tops dry weight of spinach under white and red light was highest and that under green light was lowest. Under low light intensity, 50 to 70% less top dry weight was obtained under yellow, green and blue light compared with white light.
Area, transpiration, RGR, NAR and SLA of leaves were also affected with light quality. Effects of light quality, however, were different in light intensity and/or vegetable plants. The relations between plant grown and light quality were discussed in the report.View full abstractDownload PDF (2617K) -
Wastewater Treatment by Methane Fermentor with High Concentration of Methane MicrobesYutaka KITAMURA, Takaaki MAEKAWA1993 Volume 24 Issue 2 Pages 85-92
Published: September 20, 1993
Released on J-STAGE: September 05, 2011
JOURNAL FREE ACCESSUsing a 23L methane fermentor incorporating an Ultra Filter membrane system and a rolled sieve as a fixed bed to maintain a high concentration of methane microbes, Shochu (one of the Japanese distilled spirits) distillery wastewater was used to find its improvement and suitable operating conditions. During the preliminary experiments, it was observed that the increase in NH4+ concentration due to the low C/N of the wastewater reduced the concentration of methane microbes, after that the digested gas production rate was decreased. To avoid the inhibition of methane fermentation by NH4+, the wastewater was diluted 1.6 times with water based on the nitrogen balance. However, NH4+ still gradually increased and the methane fermentation was inhibited in the subsequent runs. This NH4+ increase was considered to be induced by the decomposition of microbes in the fermentor. For the purpose of reducing the biological stress and the decomposition of microbes, the low pH value of the diluted wastewater was adjusted to the neutral range with Ca(OH)2. During this improved experiment, the methane microbes was increased and stability of the digested gas production could be observed, even when the concentration of NH4+ was maintained at ca. 3800mg/L. Based on these results, the operational conditions of 5.8kg-VS/m3·d of Lvs (loading rate of volatile solids) and 9.6 days of HRT (hydraulic retention time) were proposed as a suitable operational condition. This condition could perform 80% of the VA (volatile acid) removal ratio and 0.5m3/kg-VS of the digested gas yield.View full abstractDownload PDF (1030K) -
Kiyohiko TOYODA, Hatsuo KOJIMA, Ryuzou TAKEUCHI, Hiroshi KAMADA1993 Volume 24 Issue 2 Pages 93-98
Published: September 20, 1993
Released on J-STAGE: September 05, 2011
JOURNAL FREE ACCESSIn this study, a simple method for measuring the growth of hairy roots by image analysis has been developed. Hairy roots have attracted researchers' attention because of their content of plant tissue for the production of ample, valuable metabolites in bio-reactors and for use in plant breeding. The authors have constructed a computer vision system which can acquire distinct images of hairy roots under growth in an Erlenmeyer flask, and a recommendable morphological index for estimating the root growth is discussed. The results showed that the area of projection was sufficient to estimate the fresh weight of hairy roots under in vitro culture, that the lag phase and logarithmic growth phase could be estimated from the image of the root grown for 4 weeks, and that the growing process of hairy roots can be quantitatively represented by a determined growth equation.View full abstractDownload PDF (2452K) -
Kazuhiko ABE, Masahito SUZUKI, Makoto NARA1993 Volume 24 Issue 2 Pages 99-106
Published: September 20, 1993
Released on J-STAGE: September 05, 2011
JOURNAL FREE ACCESSDownload PDF (898K)
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