This 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.
Expression deliquoring of oily sludge from a petroleum refinery plant
Waste Management ; 19 , 5 ; 349-354
1999
6 Seiten, 8 Bilder, 1 Tabelle, 14 Quellen
Article (Journal)
English
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