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Via dei Palustei 16, Meano - 38121 - TRENTO

Final Design for the improvement of the potabilization system of Novi Ligure (AL)

Approx. value of the construction cost (in current US$):

US$ 2.029.131,00

Approx. value of the contract (in current US$):

US$ 15.500,00

Country: Italy.

Location within country: Novi Ligure, Province of Alessandria, Piemonte Region.

Name of Client:

Gestione Acqua S.p.A.

Start date (month/year): December 2019

Completion date (month/year): February 2020

Name of associated Consultants, if any: None


Description of actual services provided by your staff within the assignment:

KEYWORDS: concept; detailed design; potabilization; drinking water plant; revamping; screening; fast mixing; Flocculation; MBR; disinfection.

  • Use of the best available technologies (Best Available Technologies, BAT) in the field of water treatment.
  • Plant design to respond to customer treatment requests, guaranteeing high standards potabilization yields and refining the quality of the final product from a microbiological and turbidity.
  • Introduction of technical solutions aimed at minimizing the system’s energy consumption and reducing the dosage reagents.
  • Choice of machines characterized by high performance, reduced energy consumption and low noise.
  • Creation of works perfectly inserted in the surrounding area, in order to minimize the visual impact.

Description of Project:

Koch Membrane Systems Inc has entrusted ETC Engineering with carrying out the final project drawings for the revamping of the Variano filtration plant. The intervention was aimed at the reconstruction of the drinking water plant, following a first phase of urgent interventions on the existing one. The development of the works was divided into four phases, including the modification of the supply and distribution system, the supply of the membranes and the construction, in two separate lots, of the civil and plant engineering works.
The plant operated with a capacity of about 200 l/sec (= about 720 m3/h), fed with surface water from two sources and it was sized for a capacity of 720 m3/h (200 l/s).

The new treatment phases were divided as follows:

  • insertion in the existing tank where all the wells of a dosing system meet of coagulant and a mixer, as well as a 0.5 mm protective filtration.
  • the creation of a flocculation tank between the filter shed and the existing tank.
  • construction of a new shed where to install the trains of immersed membranes for the water treatment.
  • the creation of an underground pipe for the disposal of the sludge produced during the drinking water process.
The individual phases take on a different importance, with respect to the goal of final quality, to grow input turbidity, associated with the presence of metals and bacterial load. The processes can be activated and exercised also in a different way, based on the input quality.

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