Aprobada la licitación de la depuradora del Polígono del Valle de Güímar por 6,9 millones

El Cabildo de Tenerife, a través del Consejo Insular de Aguas (CIATF), ha aprobado la licitación de las obras de ejecución de la Estación Depuradora de Aguas Residuales Industriales (Edari) del Polígono del Valle de Güímar y las actuaciones complementarias por un importe de 6,9 millones de euros, aproximadamente. Los trabajos tienen un plazo de ejecución de 23 meses, incluyendo los 17 meses de instalación más el periodo de prueba de las instalaciones. Las obras están condicionadas a la obtención de la autorización de vertido al mar.

El ayuntamiento de Candelaria ha aprobado ya el convenio y ha sido aceptado por el Consejo Insular de Aguas. El siguiente paso indispensable para la construcción de la Edari y, en consecuencia, de la continuidad de la actividad del Polígono de Güímar, es la aprobación por parte del Ayuntamiento de Güímar del convenio. En ese sentido, el compromiso del consistorio sureño es abordar esta situación lo antes posible –la próxima semana- en un Pleno extraordinario. Dicho acuerdo es necesario e indispensable para obtener la autorización del vertido. Una vez que el Ayuntamiento de Güímar apruebe el documento, el Pleno del Ayuntamiento de Arafo procederá a su aprobación y podrá continuarse con los trámites para la construcción.

Las obras de la Edari del Polígono del Valle de Güímar se dividen en cuatro grandes bloques. Así, la Edari se ubica en la parcela del polígono industrial donde actualmente se encuentra la Estación de Tratamiento de Aguas Residuales (ETAR) municipal. El sistema de depuración se compone en su línea de agua de pretratamiento adecuado, microtamizado, tanque de laminación y homogeneización de caudales, tanque de cuarentena, tratamiento físico-químico, tratamiento biológico convencional, decantación secundaria, desinfección del agua tratada y vertido al mar por el emisario submarino. El caudal medio actual a la entrada de la Edari es de 13,2 l/s, siendo el caudal máximo a tratar en el futuro de 26,5 l/s. Por su parte, la línea de fangos dispondrá de un espesador de fangos, deshidratación de fangos y tolva de almacenamiento de los fangos deshidratados.

Las obras también incluyen la urbanización de la parcela, incluidos los muros de contención para la formación de plataformas rampas y viales. Así, las instalaciones quedarán recogidas mediante dos edificios: uno de pretratamiento y secado de fangos y otro de aireación y control. La urbanización se completa con los viales interiores y acerados y el cerramiento de la planta dispuesto mediante muros y malla. Además, como elementos de terminación se ornamentará con jardinería.

La segunda obra consistirá en la reparación del emisario y nuevo aliviadero. Se realizará la reposición del tramo afectado con tubo de 630 mm de polietileno de alta densidad y pendiente del 1 por ciento hasta conectar con el nuevo arquetón de cabecera del emisario submarino. Así, se retirarán los ramales de difusores, se colocará un nuevo tramo del eje, una nueva arqueta de cabecera del emisario y un nuevo tramo terrestre de emisario desde la nueva arqueta de cabecera hasta intersecar la actual. Por otra parte, se realizará un nuevo aliviadero para evacuar los caudales de exceso.

La tercera intervención consistirá en la separación de los caudales urbanos/industriales de La Viuda y la reubicación de la Estación de Bombeo de Aguas Residuales (EBAR) actual. La actuación consiste en la eliminación de la EBAR y prolongar el colector de aguas residuales industriales hasta la parcela de la Edari, en la cual se proyecta un bombo rápido para elevar las aguas residuales de este colector hasta la entrada de la Edari. Asimismo, se ejecutará un nuevo colector de aguas residuales urbanas paralelo al colector de aguas residuales industriales desde el núcleo de La Viuda hasta la parcela de ubicación de la EDARI, en la cual se proyecta un bombeo rápido que impulsa las aguas residuales urbanas hasta la Estación de Bombeo de Aguas Residuales Urbanas (Ebaru) del polígono.

Finalmente, se procederá a la adecuación de la actual Ebaru de centralización costera a Estación Depuradora de Aguas Residuales Urbanas (Edaru) comarcal. La actuación consiste en la puesta en funcionamiento de la ETAR existente en la parcela de la futura Edari para recibir las aguas residuales urbanas del núcleo urbano de La Viuda y bombearlas hasta la Edaru Comarcal Valle de Güímar, actualmente en ejecución. Además, la actuación contempla la ejecución de medidas ambientales como riegos periódicos de la zona de obra, trasplante de ejemplares de Euphorbia balsamífera y plocama pendula, y reciclaje de materiales terrígenos y pétreos.

 

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