Maria De Fátima Nunes De Carvalho,Maria Adelaide Araújo de Almeida,Ana Rita da Silva Prazeres, Instituto Politécnico de Beja - Escola Superior Agrária, Tecnologia e Ciêncas Aplicadas, maalmeida@ipbeja.pt
Abstract
The characterization of airplane wastewater from Portela Airport, Lisbon Portugal, allow to conclude that it presents a high concentration of SST, COD, a low biodegradability, COD/BOD5, between 0,17 and 0,42, and high concentrations of Cland NH4 + . The SST, mainly from paper, has to be removed before any treatment. The application of decantation, centrifugation and coagulation /flocculation with 0,2 M of coagulant Al2(SO4)3 allow SST removals of 68%, 88% and 92%, respectively. The decantation is the operation that has a lower percentage removal of COD, 34%, against 39% for coagulation /flocculation with 0.02 M Al2(SO4) 3 and 40% for centrifugation. The resulting effluent, from these operations, have a low biodegradability than the initial wastewater.
Keywords: airplane Wastewater; treatment; solid removal.