Chung H.-Y.Chu C.-P.Lee D.-J.2019-05-142019-05-14200403681653https://scholars.lib.ntu.edu.tw/handle/123456789/408047We hanged the activated sludge floc on an elastic nylon stick, and then measured its displacement when the floc was subjected to a uniform water flow. The hydrodynamic drag force exerted on the floc was subsequently estimated, both for cationic flocculated locs, and for the flocculated then freeze/thawed flocs. The drag force ranged 0.01-0.06 dynes over Reynolds number of 11-27. These results could be used as the benchmark for floc model development. The three-dimensional model reconstructed from the confocal laser scanning microscope (CLSM) images revealed the complex structure within the floc.Activated sludgeDrag forceFlocMeasurementStructurejournal article2-s2.0-2542421725https://www.scopus.com/inward/record.uri?eid=2-s2.0-2542421725&partnerID=40&md5=c3a96c6a98361cf313302ea4d596cfaf