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Volume 36 (2005 - 200･･･
- Issue 4 Pages 187-
- Issue 3 Pages 137-
- Issue 2 Pages 87-
- Issue 1 Pages 1-
Volume 36, Issue 2
Displaying 1-4 of 4 articles from this issue
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Z. Y. ZHANG, Y. N. YANG, J. LU, T. MAEKAWA2005 Volume 36 Issue 2 Pages 87-92
Published: September 25, 2005
Released on J-STAGE: September 05, 2011
JOURNAL FREE ACCESSAcclimated H2/CO2 using methanogen was cultured using stopped tube, with the production of vitamin B12 as a by-product. And the process of extraction and refining of vitamin B12 from culture liquid were studied. The XAD-2 resin was used for separation of vitamin B12, and more than 90% of vitamin B12 yield was achieved by modification for vitamin B12 extraction and refining method used in this study. Under light and shade-culture condition, it was indicated that shading condition was required when the goal of methanogen cultivation is to produce vitamin B12. Furthermore, in order to extract vitamin B12 suitably from intracellular, the process of freezing and thawing for methanogen is necessary. Also, the highest vitamin B12 concentration was obtained when methanogen having a high activity in logarithmic growth phase. Therefore, it was found that, the logarithmic growth stage was important for vitamin B12 production from methane fermentation.View full abstractDownload PDF (714K) -
Takaaki SATAKE, Osamu SAKATA, Jun SAMATA2005 Volume 36 Issue 2 Pages 93-100
Published: September 25, 2005
Released on J-STAGE: September 05, 2011
JOURNAL FREE ACCESSWe improved the simulator proposed in our former paper to support the rational construction of agricultural facilities using simulated annealing (SA). Layout design simulations were carried out to clarify the feasibility of applying them to practical layout design of agricultural facilities. First, the optimal layout design for a new building and a parking area in a practical site that was not a simple rectangle and contained existing buildings was carried out using the simulator. Conditions for layout design were obtained and optimal layout satisfying this design was attained.
Second, the optimal layout design of machinery for processes such as receiving, drying, husking and bagging of rice in an agricultural facility was also carried out under conditions such that the machinery would be in line with the treatment process, correctly connected to one another and placed out of the rice center building.
As a result of these simulations, optimal layout designs for agricultural facilities and machinery in the rice center obtained were almost identical to those designed by a skilled design engineer. These results establish that the 2-dimensional layout design simulator we developed is useful for practical application.View full abstractDownload PDF (1073K) -
Makoto ABE, Takaaki MAEKAWA2005 Volume 36 Issue 2 Pages 101-109
Published: September 25, 2005
Released on J-STAGE: September 05, 2011
JOURNAL FREE ACCESSAfter activated sludge treatment, three kinds of swine wastewaters from two hoggeries in Ibaraki prefecture were electrochemically treated using iron electrodes. We investigated the removals of nitrogen and phosphorus from the aqueous solutions. The iron anode was oxidized and solubilized by the process; as a result, nitrogenous and phosphoric suspensions distributed in the wastewater formed insoluble products by electro-coagulation and electro-flotation. We observed the rise and fall of ammonium and nitrate. In this work, a model that represents the electrochemical treatment process was considered and presented in order to study the influence of mixed insoluble matter on electrochemical decomposition of soluble nitrogen and phosphorus. The removals of nitrogen and phosphorus during one-hour treatments of all the wastewaters were influenced by the insoluble products. The total nitrogen removals were 0-30% and the total phosphorus removals were approximately 90%.View full abstractDownload PDF (3024K) -
Stationary type internal quality evaluation device for pineapplesSadao OMORI, Hironoshin TAKAO2005 Volume 36 Issue 2 Pages 111-118
Published: September 25, 2005
Released on J-STAGE: September 05, 2011
JOURNAL FREE ACCESSThe Pineapple (Okinawa product, variety Smooth Cayenne) is one of the fruits which are difficult to judge from the outside the degree of ripeness and the internal condition. So it was necessary to develop a device for evaluating the internal quality of a pineapple without opening the fruit. As a result of comparing few non-destructive evaluation methods, we found the possibility of the use of the amount of transmitted light by a halogen lamp. The new “stationary-type” device has a monitor, a halogen lamp, and a highly sensitive camera to catch the transmitted light through the pineapple for image processing to judge the degree of ripeness and the internal disease of a Pineapple regardless of the outer color. As for the evaluation of the internal disease, a conspicuously small amount of transmitted light goes through the diseased fruit enabling us to detect the disease.View full abstractDownload PDF (7282K)
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