透過性支持体を用いた回転円板法による下廃水処理の特性 [in Japanese] Wastewater Treatment by Rotating Biological Contractor with Permeable Substratum [in Japanese]
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Generally, an impermeable plate has been used as the substratum of rotating biological contractors (RBC). In this study, 'wire nets' are used for the permeable substratum of RBCs. As a result, the following findings were elucidated : (1) The substrate removal rate of the permeable substrata is higher than that of the impermeable ones due to bio-mass existing in the space of the substratum and the increase of bio-film thickness. (2) The stable treatment performances are attained in case of short- and long-term change of loading. (3) After detaching bio-film from the substratum, the substrate removal rate of the permeable substratum is not decreased by reactivating of the remained bio-film. Concluding from the above results, when permeable substratum is used in RBCs and any detachment is occurred on the bio-film, the detachment face retrieves a new bio-film surface. Dominant microorganisms in the deep bio-film can be activated. Then it is predicted that the substrate removal rate increases more than the one in the impermeable substratum.
- Journal of Japan Society on Water Environment
Journal of Japan Society on Water Environment 22(2), 133-138, 1999-02-10
Japan Society on Water Environment