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Volume 35 (2004 - 200･･･
- Issue 4 Pages 197-
- Issue 3 Pages 149-
- Issue 2 Pages 75-
- Issue 1 Pages 1-
Volume 35, Issue 4
Displaying 1-6 of 6 articles from this issue
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Guiling HAO, Michinori NISHIO, Takaaki MAEKAWA2005 Volume 35 Issue 4 Pages 197-204
Published: March 25, 2005
Released on J-STAGE: September 05, 2011
JOURNAL FREE ACCESSThe isolation of Na-phytate-decomposing microorganisms was attempted from solid farmyard manure using the culture medium, which contained Na-phytate as a sole source of P, and the stimulation of phytate P was also attempted by inoculating the fungal isolates in pig farmyard manure. The following results were obtained.
1) Numerous Na-phytate-decomposing microorganisms were obtained from cow farmyard manure. Among them fungal isolates could more vigorously decompose Na-phytate than bacterial and actinomycetal isolates.
2) Using the fungal isolates of high ability of Na-phytate decomposition, their ability to decompose Ca-phytate, Zn-phytate and Cu-phytate were examined. Although all isolates could decompose Ca-phytate, only fungal isolates could decompose Zn-phytate and Cu-phytate.
3) The fungal isolates of high ability to decompose Zn-phytate and Cu-phytate were inoculated to pig farmyard manure, and were incubated at 25°C for 90 days. In comparison with the uninoculated manure, inorganic P was increase by 17% and phytate P was decreased by 21% in the inoculated manure.View full abstractDownload PDF (1021K) -
Decolorization conditions of different concentrations in compositions of treated swine wastewaterYuichiro WAKIYA, Takahiro MATSUO, Takahiro SAKAI2005 Volume 35 Issue 4 Pages 205-210
Published: March 25, 2005
Released on J-STAGE: September 05, 2011
JOURNAL FREE ACCESSTo confirm the performance of a treated swine wastewater decolorization system, the combination of an Ozonation Process and a sand filter was investigated.
This study made use of an Ozonizer with a titanium dioxideelectrode and a honeycomb structure, which produced 3g-Ozone per hour.
In Experiment 1, the decolorization conditions of the low concentration composition against chromaticity in thetreated swine wastewater were examined. Likewise, in Experiment 2, decolorization conditions of the high concentration composition were examined. In both experiments, the volume of treated swine wastewater in a reactor tank was 300 liters.
The results showed that the Ozone production was not affected by temperature or moisture. In Experiment 1, a chromaticity of less than 50 degrees was obtained at about 4 hours, whereas in Experiment 2, low decolorization and high Ozone consumption was found.
These findings indicated that a low concentration of COD and NOX-N in the treated swine wastewater was obtained by use of this low cost Ozonation Process.View full abstractDownload PDF (3742K) -
Michiaki OMURA, Yoshiteru TAKEUCHI, Katsunori MATSUI, Sadao KIKUCHI2005 Volume 35 Issue 4 Pages 211-220
Published: March 25, 2005
Released on J-STAGE: September 05, 2011
JOURNAL FREE ACCESSIn this paper, environmental and economical evaluation of the excess biogas transport, storage and the utilization system from biogas plant in the individual dairy farm was carried out. The results of the analysis for the S town, Hokkaido, are following.
1. As a result of comparing the environmental loading in the influence to global warming, the PSA method, and the system for transporting the methane was the most predominant.
2. The system for transporting the biogas without refining concerning the economical efficiency, is the most predominant. Only in this case, balance for 10 years is surplus.
The most appropriate alternative in the current is an option transported without refining the biogas. The methane gas concentration and gas yield of the biogas greatly influences this result.
The future problem is more accurate examination of gas transport, storage and future prospect of utilization system by using actual data such as gas yield of biogas plant which constructed in the S town.View full abstractDownload PDF (3007K) -
Toshio KAWANO, Takahiro YOSHIMURA, Masafumi KAWAI, Katsumi ISHIKAWA2005 Volume 35 Issue 4 Pages 221-228
Published: March 25, 2005
Released on J-STAGE: September 05, 2011
JOURNAL FREE ACCESSA water purification process is essential in flow waste water away from agricultural facilities or in using water for agricuture, but it in general costs much. Rocks produced abundant in nature are porous structure and have property of adsorbing solid material in suspension because of charge on the surface, and therefore it will have potential for one of useful methods of water purification methods. However, pollutant adsorption capacity of natural rocks is still not clear from qualitative point of view.
Then, to quantitatively determine the mass adsorption capacity of natural rocks, a series of adsorption tests were conducted at the solution temperatures ranging from 10 to 30°C with an initial maximam methylene solution concentration ranging from 10 to 20ppm, using methylene blue as adsorptive medium. Four kinds of natural rocks, shist rocks, serpentine rocks, Chinese quartz porphyry rocks and ‘Hyuga’ quartz porphyry rocks were used for the tests. A mass adsorption process model constructed from a combination of Langmuir's adsorption rate equation and adsorption isothermal equation classified as I type of IUPAC's classification of equation types was proposed. Then the adsorption process was simulated using this model.
It was found that daily changes in methylene quantity adsorbed on the rocks tested were simulated well, and the basic adsorption properties of those rocks were well simulated and estimated.
The results demonstrated that the adsorption rate of rocks at 20°C was more rapid than that at 10 or 30°C, and also indicated that total adsorption quantity on the rocks peaked at 30°C reaching 8.02×10-7 to 9.03×10-7g/grocks, which were 4 to 4.5 times values at 10 and 20°C.View full abstractDownload PDF (908K) -
Yasuhiro HARADA, Naoaki DOSHU2005 Volume 35 Issue 4 Pages 229-237
Published: March 25, 2005
Released on J-STAGE: September 05, 2011
JOURNAL FREE ACCESSThe objective of this study is to estimate airborne dust and ammonia contained waste air from livestock buildings, as a part of our efforts to develop techniques for removing dust and ammonia.
Closed buildings, which are becoming widespread, were investigated from April to December 2000. The dust concentration in air ventilated from the building did not correlate well with time. The average total dust mass concentration in each production period ranged from 0.6 to 4.4mg/m3, indicating significant differences. The dust concentration correlated with the amount of ventilation, relative humidity of ventilated air and passage of days, and ventilation and passage of days significantly affected the dust concentration. The ammonia concentration in the ventilated air was higher in the summer than in the fall. As the livestock raising term increased, the ammonia concentration increased. The Offensive Odor Control Law regulates the concentration of ammonia at the boundaries of the sites. The ammonia concentration in the ventilated air exceeded the regulated concentration, which corresponds to 1 to 5ppm, and reached the level requiring deodorization. As a result of continuously measuring the ammonia concentration, we could calculate the amount of the ammonia emitted from the building. The ammonia emission was 134.8g/day in summer and 127.0g/day in fall. As the production period increased, the ammonia emitted per day increased.View full abstractDownload PDF (1095K) -
2005 Volume 35 Issue 4 Pages 242
Published: 2005
Released on J-STAGE: September 05, 2011
JOURNAL FREE ACCESSDownload PDF (85K)
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