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Volume 20 (1989 - 199･･･
- Issue 3 Pages 230-
- Issue 2 Pages 155-
- Issue 1 Pages 105-
Volume 20, Issue 3
Displaying 1-6 of 6 articles from this issue
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Xingwu WU, Hiroshi SHIMIZU, Yoshio NISHIYAMA, Toshinori KIMURA1990 Volume 20 Issue 3 Pages 230-236
Published: March 31, 1990
Released on J-STAGE: September 05, 2011
JOURNAL FREE ACCESSThe effects of aeration on the aerobic fermentation and drying process were investigated through experiments widely ranged for aeration rate which was represented by superficial velocity. While our last paper (reference 3) mainly described the experiment at the aeration rate of 7.32 [cm/min], this paper reported the results of experiments ranged from 0.18 to 40.3 [cm/min] for the aeration rate and uniformly controlled for the other conditions.
Twelve examples of experiments (Table 1), reasonably distributed for aeration rate were analyzed, using the computed estimation method confirmed its effectiveness in the previous paper. The effects of aeration rate on the material temperature rising were shown in Fig. 3-Fig. 5. The heat losses, caused by the differences between central temperatures and the outside temperature, from the side wall or from the upper covering plate varied, when the aeration rate was widely changed. We checked these relations, and improved the compensation method of the computed estimation by substituting the formulas (1)-(4) for the formulas (3)-(6) of the previous paper. After the improvement, calculations were very close to experimental values shown in Fig. 2.
Using the computed estimation method, some important characteristics of the aerobic fermentation and drying process, such as dry matter decrease, water decrease, air ratio and so on, were grasped in detail as to the lapse of time as Fig. 6-Fig. 10. Furthermore, the criteria of optimum aeration rate were presented.View full abstractDownload PDF (942K) -
Yoshihiro MARUYAMA1990 Volume 20 Issue 3 Pages 238-245
Published: March 31, 1990
Released on J-STAGE: September 05, 2011
JOURNAL FREE ACCESSAssuming that the area of a shelf can be utilized for cyclamen production prior to any other pot flower, more than two schemes were established for the production of cyclamen in greenhouse, considering the range of finished pot sizes and their profitability. Using profitability as a standard for comparison, these plans were compared, and the one yielding the most economic quantity was determined. In the process of cyclamen production, the number of sowing is determined during the first provisional planting so as to yield the necessary quantity of seedlings. Furthermore, after the production period of the first provisional planting, the quantity of seedling loss was assumed as 0. Assuming, however, that the rate of seedlings which can be planted in larger pots depends on the growth conditions of each seedling at the time of every provisional planting, the range of the finished pot sizes until the time of shipment is No. 4.5, 5, 6 and 7. Two things were considered for each size of each finished pot: the growth rate of the seedlings that are q5, q6 and q7, and the shipment prices which are a4.5, a5, a6 and a7. The research yielded the following result: Plane q6-q7, Plane a4.5-a5, and Plane a6-a7 Plane q6-q7 is useful in obtaining the most profitable scheme for cyclamen production, while Planes a4.5-a5 and a6-a7 provide conditions that make the first plane true.View full abstractDownload PDF (863K) -
Kazuhiro NAKANO, Takaaki MAEKAWA, Shingo YAMASAWA, Kazuhiko KURATA1990 Volume 20 Issue 3 Pages 246-252
Published: March 31, 1990
Released on J-STAGE: September 05, 2011
JOURNAL FREE ACCESSAn experimental study was made upon the effects of the microbial growth on the temperature rising of stored maize. Maize was prepared in different levels of moisture content, and stored in adiabatically closed containers.
The temperature rising of maize was expressed by an aerobic saccharoid reaction formula. In this formula, the coefficient of reaction, k2, expressed the characteristics of the temperature rising. The results obtained are as follows:
When sterilized maize was used or the microbial growth was restrained in each experiment, the temperature rising in storage was caused by the respiratory heat of the maize. The relationship between k2 and the moisture content of maize was expressed by a linear function.
When the ratio of the microorganism colony propagation, η, was high at the end of the storage, the degree of the temperature rising showed to be higher than in case of low η. The relationship between k2 and η was expressed by an exponential function.View full abstractDownload PDF (732K) -
Kwang Hwan CHO, Meizen AOKI, Shigeru YOSHIZAKI1990 Volume 20 Issue 3 Pages 254-260
Published: March 31, 1990
Released on J-STAGE: September 05, 2011
JOURNAL FREE ACCESSThe dielectric properties, especially dielectric constant and dielectric loss factor of paddy rice, are very important in drying of paddy rice by microwave dielectric heating. Therefore, in this paper, the dielectric properties of NIPPONBARE and BELLE PATNA were measured at 2.45GHz for several bulk densities, moisture contents and temperatures.
As the results, the dielectric constant and dielectric loss factor of paddy rice were increased with the bulk density, moisture content and temperature within the range of 2.52-5.19 and 0.303-0.963, respectively under the range of bulk density 0.6069-0.7042g/cm3, moisture content 17.0-34.7%d. b and temperature 20-40°C.View full abstractDownload PDF (793K) -
Yield Strength of Joints, Fixed Piles and Pipe ConnectorsHideo OGAWA, Ichiei TSUGE, Yoshikazu SATO, Shinji HOSHIBA, Susumu YAMA ...1990 Volume 20 Issue 3 Pages 262-269
Published: March 31, 1990
Released on J-STAGE: September 05, 2011
JOURNAL FREE ACCESSExperiments on the yield strength of joints at a ridge, fixed piles and pipe connectors of pipe-houses were conducted. The insertion length of a swage type joint at a ridge should be more than three times of the pipe diameter. The strength of the joint with much insertion is almost the same as that of a pipe without a joint. The allowable strengths for pull up of a screw pile and an anchor pile in general cultivated land are 150kg and 200kg, respectively. The yield strength of pipe connectors made of metal wire is less than that made of metal sheet, but both types satisfy the required strength.View full abstractDownload PDF (3513K) -
Ken SASAKI, Kazuo OHTSUKI, Yoshiaki EMOTO, Takashi HAMAOKA1990 Volume 20 Issue 3 Pages 270-277
Published: March 31, 1990
Released on J-STAGE: September 05, 2011
JOURNAL FREE ACCESSEffluent from anaerobic digestor of swine wastewater (EDSW) was treated by a photosynthetic bcterium Rhodobacter sphaeroides S under aerobic-dark condition. Organic matter (CODcr) and lower fatty acids in the effluent were effectively removed in batch treatment indicating that this organism was suitable for the treatment of EDSW. Continuous treatments of the effluent were performed to elucidate the fundamental growth characteristics of this organism such as the maximum specific growth rate, μm and the growth yield for COD removal, Y. Based on the values of μm (3.05 1/day), Y (0.52 g/g) and other growth characteristics obtained, a new treatment process was proposed. In this process, estimation of the scale of the aeration and sediment vessels for the treatment were carried out based on the waste from 4, 000 pigs house. As the results, the volume of aeration and sediment vessels might be reduced to ca. 1/6 and ca. 1/2, respectively, compared with the conventional activated sludge treatment process.View full abstractDownload PDF (1125K)
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