Journal of Environmental Conservation Engineering
Online ISSN : 1882-8590
Print ISSN : 0388-9459
ISSN-L : 0388-9459
Volume 38, Issue 11
Displaying 1-2 of 2 articles from this issue
  • Noriko RYUDA, Kanari YOKOBORI, Aya INOUE, Kenji ANNOURA, Isao TESHIMA, ...
    2009 Volume 38 Issue 11 Pages 801-809
    Published: November 20, 2009
    Released on J-STAGE: July 13, 2011
    JOURNAL FREE ACCESS
    Lipolytic bacteria were isolated from restaurant grease traps, and the isolate KHU, which has strong lipolytic activity, was selected for kitchen wastewater treatment. The isolate KHU, which was identified as Aeromonas sp., also has proteolytic and amilolytic ability and no pathogenic characteristics. It consumed grease and oil in restaurant wastewater at a rate of 20-46 mg/L/hr. An apparatus (the Oil Control System) which aerates a grease trap continuously and inoculates the culture of the bacterium once a day automatically into a grease trap was developed and tested. The system reduced grease and oil concentration in drainage water by 95% or greater and kept total grease quantity at 40 mg/L or less during five weeks of the experiment.
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  • Seiichi TORIYAMA, Yasushi KAMITANI, Kazutoshi TUMAKI, Chiharu TAKEMURA ...
    2009 Volume 38 Issue 11 Pages 810-818
    Published: November 20, 2009
    Released on J-STAGE: July 13, 2011
    JOURNAL FREE ACCESS
    In order to examine the yellow sand influence on leaching ions from a copper plate and a brass plate, the behavior of various ion components was examined by using an artificial corrosion exposure chamber under three conditions : (1) pure rain + gas ; (2) pure rain + gas + aerosol ; (3) artificial acid rain + gas + aerosol.
    On the condition that there is no acid fog, it was observed that the amount of corrosion of Cu and Zn from both plates was reduced by the atomizing of yellow sand. It can be considered that the oxidation-reduction potential of corrosion has contributed to this fact. Thus, the inhibition of corrosion by the yellow sand was observed under certain conditions.
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