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sur le développement des zones arides et semi-arides

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National Technical University of Athens (NTUA) 2016

Χωρική κατανομή μονάδων αφαλάτωσης στην Ελλάδα. Διερεύνηση δυνατοτήτων αξιοποίησης της άλμης από τη βιομηχανία

Bakogianni, Despoina

Titre : Χωρική κατανομή μονάδων αφαλάτωσης στην Ελλάδα. Διερεύνηση δυνατοτήτων αξιοποίησης της άλμης από τη βιομηχανία

Auteur : Bakogianni, Despoina ; Μπακογιάννη, Δέσποινα ;

Université de soutenance : National Technical University of Athens (NTUA)

Grade : Master Thesis 2016

Résumé
Desalination is increasingly playing a crucial role in balancing the water needs of water deficient areas. In Greece, there are water basins which do not have sufficient water resources to cover local needs, with the islands of the Aegean being the most water scarce. Today, more and more regions turn to desalination to secure a stable and cost-efficient water supply. In Greece, it is installed a total capacity of 162,909 m3/day derived by 256 desalination units. Since these units in this study, 233 were mapped with the use of Geographical Information Systems (GIS). Across the country, small and medium-sized desalination units operate. These units are processing mainly barkish or inlaned water and seawater as raw water. The majority of the units processing seawater are located in Greek Islands and especially in Cyclades, while in mainland the raw water is mostly brackish. The operating technology of almost all units is Reverse Osmosis (RO). In Aegean islands, the water derived from desalination plants is covering 8% of local water needs, while in the rest of Greece this figure does not exceed 1%. The final use of water produced by desalination plants is mainly drinking water to municipalities (45%), followed by industrial use (31%), use in tourist facilities (20%) and in power plants (4%). Municipality plants are concentrated in Greek Islands, and especially in the Cyclades.Through this analysis, it was found that in all the arid islands of Cyclades and Dodecanese operate municipal desalination plants. The industrial desalination plants are concentrated in the regions with the greatest industrial activity, such as Attica and Thessaloniki. The plants operating in tourist facilities are mainly concentrated in Dodecanese and Crete, areas where located the largest tourist complexes. However, even though desalination comprises one of the most promising solutions to water shortage, it raises high environmental concerns, especially due to the generation of the saline impaired wastewater which is called brine. This effluent is twice as salty as seawater and causes environmental degradation, if not managed properly. Today, none of the practices that are applied to manage brine leads to a useful final product. In the framework of the EU funded project with the acronym SOL-BRINE (LIFE09 ENV/GR/000299) it was developed an energy autonomous pilot brine treatment system, which was designed and developed in accordance with the principle of zero waste (Zero Liquid Discharge).Finally, in the present study it is examined the possibility of developing this system at a full-scale in Greece. For this reason, six types of industries were recorded. These type of industries could be possible users of the produced salt derived from the brine of desalination plants. After the implementation of a multicriteria analysis, it was concluded that the most suitable areas are Attica and Thessaloniki.

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Page publiée le 25 février 2017, mise à jour le 13 juin 2018