Abstract
In the previous report (part 3, published in 1996), the conditions to control excessive growth of filamentous bulking was proposed based on the experiments using synthetic waste water. In the above proposal, "Intermittent Inflow Process" was adopted with due consideration on substrate of synthetic waste water, BOD loading at the inflow point to the biological reactor, and inflow intervals. The intermittent inflow condition used for this experiments was to divide waste water into several batches (3 to 5 times per day) with BOD loading of waste water of 0.06〜0.2[g-BOD/g-MLSS・batch]. In this study, experiments were made with intermittent inflow process and continuous inflow process, using municipal sewage which was artificially conditioned to create uniform concentration. As a result, it was verified that the growth of filamentous bulking is controlled by the proposed intermittent inflow method.
