Valorization of olive residues by spreading on agricultural land: technical assets.

Technical-economic choices finalized to reduce labour cost as well as to improve oil quality have opposed to the traditional olive processing system, the centrifugation system of olives pastes diluited with water phase system. Along with the advantage of a continuos system, some incoveniences emerged due to the oil and would increase the volume of the waste waters. To overcome these problems, technological innovation has introduced "new decanters" able to separate the oil without the addition of water (system to 2 phases). To assure probitability to the olive-oil chain system, variedly burdened in the different geographical areas by pulverization of the structures, by high production costs and, above all, for the problem of elimination of environmental pollution (urban and water folds) caused by oil industry waste. Researches have individualized different systems to valorize the by-products (agronomic use, energetic, recovery of esteemed mixtures etc. (that offer the possibility to convert the waste into an economic resource for our olive-oil chain.