Munteanu, RodicaRodicaMunteanuArama, Madalina GeorgetaMadalina GeorgetaAramaPopa, IulianIulianPopaNicolau, MargaretaMargaretaNicolauGeorgescu, CristianCristianGeorgescuUsurelu, IonIonUsurelu2017-04-192017-04-192001-04-30Patent no. RO116616-B1http://hdl.handle.net/123456789/848Patent Assignee Name(s) and Code(s): ECOIND INST NAT CERC DEZVOLTARE ECOLOGIE; SC PETROBRAZI SAThe physicochemical cleaning of oil refinery waste water comprises coagulation and flocculation at pH 6.59 by addition of polyacrylamidebased cationic polyelectrolyte. The additive, of 40 % cationicity, is a 0.1 % solution, at 1 2 mg of active matter per litre. EMBODIMENT The treatment takes one hour, with maximum 0.5 % by volume sludge formation. The sludge is then dehydrated by centrifugation.en-USTreatmentWastewaterOil industryPhysico chemical cleaning of oil refinery waste water consists of controlled coagulation and flocculation, with up to 0.5 per cent by volume of sludgeProcedeu de epurare fizico-chimica a apelor uzate evacuate de la prelucrarea petroluluiPatent