Hung W.T.Chang I.L.Lee D.J.Hong S.G.2019-05-142019-05-14199602731223https://scholars.lib.ntu.edu.tw/handle/123456789/408096The chemical compositions changes for waste activated sludge at different freezing speeds were analyzed via FTIR spectra. With a high speed of freezing, the chemical compositions are little influenced by the action of ice formation; while with a low speed of freezing, the chemical compositions are largely affected. The prerequisite for sufficient dewaterability improvement is found as the global floc migration owing to the ice front formation, which releases some ECPs (basically cellulose) from the sludge and alter the resulting cake structure ultimately.The chemical compositions changes for waste activated sludge at different freezing speeds were analyzed via FTIR spectra. With a high speed of freezing, the chemical compositions are little influenced by the action of ice formation; while with a low speed of freezing, the chemical compositions are largely affected. The prerequisite for sufficient dewaterability improvement is found as the global floc migration owing to the ice front formation, which releases some ECPs (basically cellulose) from the sludge and alter the resulting cake structure ultimately.Chemical compositionsFreeze/thawFreezing speedFTIRUnidirectional freezingjournal article10.1016/0273-1223(96)00620-82-s2.0-0029801983https://www.scopus.com/inward/record.uri?eid=2-s2.0-0029801983&doi=10.1016%2f0273-1223%2896%2900620-8&partnerID=40&md5=e06f09b2c7408e9d3d529003b51a4a70