[en] The Muskiz WWTP pours its effluent directly to Barbadún, affecting the quality of the waters in the wetland and in the mouth of this estuary on the beach. On the other hand, the high water consumption of Petronor is an environmental problem due to the contribution to the depletion of said resource. With the expansion of the Muskiz WWTP and the addition of a refining and storage stage for treated water for later industrial reuse, both problems can be attacked. The refining stage consists in a membrane process based on ultrafiltration, which allows improving the physical and biological parameters required by legislation for industrial use. Furthermore, a final chlorination is carried out that provides a lasting disin fection until its reuse. Finally, the water is stored in a tank which has enough capacity to dam all the treated volume for more than twelve hours. The new installations that have been raised in the plot of the Muskiz WWTP, following the natural route of the water, are: a chest and pumping well (arranged after secondary treatment), ultrafiltration equipment based on hollow fiber filters and a deposit placed at the end of the line and after the chlorination. In addition, a tank of clean water has been placed to cover the washing cycle of the filters and the necessary conductions to materialize this refining treatment. It has been bet, mainly, by prefabricated equipment and elements done in various materials (concrete, polyester reinforced with fiberglass, steel and other metals...). In this way, a quick start-up and a reduction in terms will be achieved. That translates into a minimal impact on the current operation of the WWTP. The total of the project will go out to tender with a Contract Execution Budget of 1.564.318,05 €. The estimated execution time, having a correct planning and sufficient manpower, will be around 60 days.

[eu] Muskizko UHA-k bere ur-efluentea zuzenean Barbadunera botatzen du, hezegunearen uraren kalitatea eta hondartzaren itsasadarraren estuarioa kaltetuz. Bestalde, Petronor-en ur kontsumo handia ingurumen-arazo argi bat da,baliabide hori agortzeaz laguntzen baitu. Muskiz UHA-ren hedapenarekin, eta tratatutako uraren fintze eta biltegiratzearekin batera, ondorengo berrerabilpen industrialerako, bi arazo hauek murriztu daitezke. Fintze-etapa ultrafiltzazioan oinarritutako mintza prozesua izango da. Eta honek industria erabilerarako legeak eskatzen dituen parametro fisiko eta biologiko arte hobetuko du tratatutako uren kalitatea. Gainera, egiten den azken klorazioarekin, desinfekzio iraunkor bat bermatzen da berrerabilera arte. Azkenean, ura hamabi ordu baino gehiagoko edukiera duen depositu batean gordetuko da. Muskizko UHA-n planteatu diren instalazio berriak, uraren ibilbide naturala jarraituz, hurrengoak dira: kutxatila eta ponpaketa putzua (bigarren mailako tratamenduaren ondoren jarrita), ultramiltzazio ekipo bat zuntz huts iragazkietan onarritutakoa eta linearen buztanan, klorazio ondoren, kolokatutako depositu bat. Gainera, iragazkien garbiketa zikloa betetzeko, beste depositu bat jarri da eta tratamendu osoa gauzatzeko behar diren hodiak ere. Batez ere, ekipamendu eta elementu aurrefabrikatuengaz apustu egin da, material desberdinez eginak (hormigoia, beirazko zuntzaz indartutako poliesterra, altzairu eta beste metalak...). Horrela, denbora minimo batean amaituko dira lanak eta UHA-ren egungo lanetan eraginak txikiagotuko dira. Dena kontuan hartuta, Kontrata Egite Aurrekontua hurrengoa da: 1.564.318,05€. Eta egite epea, plangintza aproposa eta eskulan nahiko bat suposatzen, 60 egungoa, gutxi gorabehera, izango da.