| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for delaying putrefaction of a treating liquid by which putrefaction of the treating liquid such as a cutting oil, a hydraulic oil, a metal drawing oil, a washing liquid, or the like, used in applying to various machines is delayed, and capable of preventing generation of malodor. SOLUTION: This method comprises a process wherein a useful microorganismic group in which an anaerobic microorganism and an aerobic microorganism live together is made to contain in a waste sand in a mold and the mixed sand is formed into spherical bodies and a process dipping the resultant spherically shaped putrefaction suppressor in a treating liquid such as a cutting oil, a hydraulic oil, a metal drawing oil, a washing liquid, or the like, used in applying to various machines such as a working machine. The waste sand in the mold can become a habital for the useful microorganismic group. An antioxidant, or the like, produced from the useful microorganisms is diffused from the putrefaction suppressor.
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