**2.3. Olive mill wastes legislation**

According to their nature, the extraction methods and the different phases of management, the olive mill by products have to follow different laws concerning storage, treatment, transport, application to the soil, or other destinations.

#### *2.3.1. Waste waters legislation*

The WW legislation is based on their two possible different destinations: agronomic or landfill. In case of agronomic use without any preventive treatment, the reference is the Law n. 574/1996. As established by the Decree of the Ministry of the environment, on the "Individuation of non dangerous wastes submitted to the simplified recovery procedures to the senses of the articles 31 and 33 of the Legislative Decree 05.02.1997 n. 22", the WW can also be recovered through the "Production of fluid fertilizers, as by the Law n. 748 of 19.10.1984: "New norms for the fertilizers discipline".

If the WW cannot be used in agronomical purposes, it is necessary to apply preventive treatment. The products, resulting from the purification process, can be schematized as follows:



Another possible destination of the WW is the agronomic use after an a intermediary phase for production of liquid fertilizers, conforming to the Law 748 19.10.1984, "New norms for the discipline of the fertilizers", according to the norms of the D.M. 05.02.1998 of the Ministry of the environment. As a consequence, WW must be recovered according to the point R3 of the Annex C of Legislative Decree n. 22/1997, article 6, paragraph 1, letter h, ("Recycle/recover of the organic substances not used as solvents, included the composting operations and other biological transformations").
