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Volume 15 (1984 - 198･･･
- Issue 3 Pages 8-
- Issue 2 Pages 1-
- Issue 1 Pages 7-
Volume 15, Issue 1
Displaying 1-3 of 3 articles from this issue
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Characteristics of loading of organic matter on swine waste as the substrate for methane fermentationTakaaki MAEKAWA, Shingo YAMAZAWA, Seiji YOSHIKAWA, Taira HANAOKA1984 Volume 15 Issue 1 Pages 7-21
Published: October 25, 1984
Released on J-STAGE: September 05, 2011
JOURNAL FREE ACCESSBased on a possibility of the phase separation of methane fermentation connected the two fermenters in series which had different hydraulic retention times, the experiment of the two-phase methane fermentation was performed with the substrate of the mixture of swine feces, and swine feces and urine. As the results, it became possible to charge higher loadings of organic matter than that of the former conventional methane fermentation, and digested gas production rate was maintained high as the digested gas yield was increased by 20-30%. It was found that the loading of organic matter (Lvs) of 7.5kg-vs/m3/d was the optimum for the purpose of recovering the energy, and the Lvs of 5.0kg-vs/m3/d was optimum operation condition in case of considering for the quality of digested liquid, such as the ratio of volatile solid removal, volatile acid removal, and NH4+. In addition, each methane gas production rate is 1.596, 1, 447Nm3-CH4/m3/d, respectively.View full abstractDownload PDF (1744K) -
Physiological Response Characteristics of Fattening Pigs to Hot EnvironmentMasayoshi MINOWA, Yuji OHGANEMASA, Hiroaki SHISHIDO, Noriaki YAMAGISHI ...1984 Volume 15 Issue 1 Pages 22-35
Published: October 25, 1984
Released on J-STAGE: September 05, 2011
JOURNAL FREE ACCESSIn order to get the basic information on evaluating and controlling the thermal environment in open-type livestock barns under hot weather based on physiological responses of animals, the authors measured dynamci physiological responses (respiration rates, rectal temperatures and pulse rates) of seven fattening pigs (38.0 to 50.5kg weight) to hot environment.
Dynamic characteristics of physiological responses when pigs were exposed to air temperatures of 30 and 35°C with 40, 60 and 80% humidities were revealed by the present measurement (Table 2 and 3, and Figs. 1 to 3). And dynamic responses when they were exposed to long wave-length radiant heat of about 550 and 850kcal/m2.h at 20 and 30°C with 60% humidity were presented (Figs. 5 to 8).View full abstractDownload PDF (2029K) -
Ikuo HORIGUCHI1984 Volume 15 Issue 1 Pages 36-41
Published: October 25, 1984
Released on J-STAGE: September 05, 2011
JOURNAL FREE ACCESSThe measurements of heat consumption in a greenhouse were performed in mid winter of Hokkaido. The maximum heating load coefficient was about 4.8kcal/m2·hr·°C, that was larger than the design value. The reason was surmised that heat consumption from pipe radiator became large because of high temperature difference between center and side of greenhouse in mid winter.
The mean heating load coefficient was about 1.6kcal/m2·hr·°C in nighttime, however the large mean heating load coefficient appeared during the day rather than at night. It was caused by that outdoor temperature was very low during the day and interior temperature had to be kept high because of photo-synthesis of crops.
The daily heating degree-hour measured in this study was compared with the degree-hours that were proposed by some authors. It was recongnized that the corrected Mihara equation had good correlation coefficient with the measured degree-hour.View full abstractDownload PDF (743K)
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