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Near zero energy wastewater treatment plants for the Greek islands

Gikas Petros, Tsoutsos Theocharis

Πλήρης Εγγραφή


URI: http://purl.tuc.gr/dl/dias/5CC29CEE-C79B-4F5E-AA66-7981EA8711FF
Έτος 2015
Τύπος Δημοσίευση σε Περιοδικό με Κριτές
Άδεια Χρήσης
Λεπτομέρειες
Βιβλιογραφική Αναφορά P. Gikas and T. Tsoutsos, "Near zero energy wastewater treatment plants for the Greek islands", Desalinat. Water Treat., vol. 53, no. 12, pp. 3328-3334, 2015. doi:10.1080/19443994.2014.934109 https://doi.org/10.1080/19443994.2014.934109
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Περίληψη

Conventional wastewater treatment is an energy-intensive process, requiring electric energy of about 1.1–2.4 MJ/m3, being higher in plants with relatively small hydraulic capacity (<5,000 m3/d). Solar energy can be used to supply electric energy, particularly for the Greek islands; however, the huge energy demand of the wastewater treatment is a drawback for the use of photovoltaic energy, due to the additional capital cost and electricity storage requirements during the night. Here, a novel approach for wastewater treatment is proposed, based on enhanced primary solids removal, by the use of advanced sieving and filtration processes, utilizing a proprietary rotary fabric belt microscreen followed by a proprietary continuous backwash upflow media filter. Raw municipal wastewater treated with the above process results in about 80–90% reduction in TSS and 60–70% reduction in BOD5. The overall electrical power requirements for a novel configuration plant with hydraulic capacity of 1,000 m3/d (typical capacity for small settlements in the Aegean islands) have been calculated to about 10 kW, as compared to over 25 kW for a conventional activated sludge system with the same capacity.

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