| 摘要 |
<p>PURPOSE:To enable the highly efficient and massive treatment of an isoprenic rubber by semi-continuously decomposing the isoprenic rubber with rubber- decomposing microorganisms belonging to the genus Nocardia or Rhodococcus under a non-sterilizing condition. CONSTITUTION:A reaction vessel provided with a ventilating equipment and/or a stirrer and with equipments for controlling the temperature and pH thereof, such as a jar fomenter for culturing microorganisms is charged with a nitrogen source, a phosphorus source, etc., as additive sources except the rubber according to an ordinary culturing method of aerobic microorganisms and subsequently maintained at a temperature of approximately 30 deg.C and at a pH of approximately 7. The wastes of an isoprenic rubber such as natural rubber are semi- continuously added in a load amount of 0.17-0.7g/l.day under a non-sterilizing condition and decomposed while culturing rubber-decomposing microorganisms belonging to the genus Nocardia or Rhodococcus. Since the rubber-decomposing ability of the microorganisms can be maintained even after operated for a long period, the method can be expected to be widely utilized as a readily controllable, biologically decomposing treatment method.</p> |
