Jean D.S.Lee D.J.2019-05-142019-05-1419990956053Xhttps://scholars.lib.ntu.edu.tw/handle/123456789/407870This work evaluates filtration followed by expression characteristics of oil-containing sludge from a dissolved-air-flotation unit of a petroleum refinery plant at a mechanical pressure of 2000 psi. Although slightly but finitely enhancing the deliquoring rate, cationic polyelectrolyte conditioning cannot significantly reduce the residual liquor content after expression. In contrast, freeze/ thaw treatment can significantly improve the sludge's deliquorability and markedly reduce the bound liquor content. Closely examining the freezing time and the required cost revealed that freeze/thaw technique is a feasible means of treating oily sludge from a petroleum refinery plant.CompositionsDeliquoringExpressionOily sludgejournal article10.1016/S0956-053X(99)00139-72-s2.0-0032855992https://www.scopus.com/inward/record.uri?eid=2-s2.0-0032855992&doi=10.1016%2fS0956-053X%2899%2900139-7&partnerID=40&md5=c0383c67373de2c77318c6a3e46770f4