Lee D.?J.Lee S.F.2019-05-142019-05-14199502682575https://scholars.lib.ntu.edu.tw/handle/123456789/408434The bound water content of original and frozen activated sludge and an inorganic sludge were measured via differential scanning calorimetry (DSC) and drying tests. Original sludge contained a significant level of bound water which was reduced by about 50% after freeze/thaw treatment. A simple thermodynamic interpretation showed that liquid–solid binding strength played an important role in depression of the freezing point of bound water in a sludge. The choice of a threshold temperature in a DSC test was equivalent to definition of a threshold binding strength dividing bound/non?bound water content. The possible close relationship between the bound water content measured via DSC and the drying test is discussed. The importance for sample uniformity was also examined. Copyright ? 1995 SCIbound waterdrying testDSC testfreeze/thaw process[SDGs]SDG6journal article10.1002/jctb.2806204082-s2.0-0029278218https://www.scopus.com/inward/record.uri?eid=2-s2.0-0029278218&doi=10.1002%2fjctb.280620408&partnerID=40&md5=b85624d112903290cf2a5644cccf1f30