| 摘要 |
<p>Provided is a method of treating wastewater, containing: the flow-in step of flowing an organic wastewater into an activated sludge tank holding an activated sludge containing microorganisms therein; and the separation step of biologically treating the organic wastewater in the activated sludge tank and then subjecting thus treated liquor to solid-liquid separation with the use of a separation membrane device located in the activated sludge tank, wherein the sugar concentration in the aqueous phase of the activated sludge is maintained within a certain range in the separation step. The method of the present invention allows adequately evaluating the risk of decreasing the effective membrane area caused by the adhesion of biopolymers to the membrane surface, thus achieving efficient wastewater treatment while preventing the increase in the membrane filtration resistance.</p> |
