Revamping Depuratore Santa Marinella Nord

infrasturttura idrica con una vasca piena d'acqua, delle strutture in ferro e gli alberi sullo sfondo

Description and objectives

 

The adaptation project of the Santa Marinella Nord purification plant includes a series of works aimed at improving the efficiency of wastewater treatment.

The work programme has been designed to minimise interference with the management and maintenance activities of the existing works, which continue to operate during all phases of work.

Project specifications

 

Adaptation of a secondary sedimentation unit by dividing it into two functional units:

  • The first unit for powering the actual system, with a capacity of up to 3 Qmn.

  • The second unit for the accumulation of rainwater, with a capacity of up to 2 Qmn.

 

Transformation of trickling filters

  • Conversion of the two existing trickling filters into a “single basin” system that includes the denitrification and nitrification phases of the treatment.

 

Secondary sedimentation

  • Implementation of a new secondary sedimentation phase.

 

Electrical cabinets

  • Construction of a new MV/LV cabinet.

  • Adaptation of the existing electrical transformer cabinet.

Control software:

  • Updating of the command and control software for the regulation of air during oxidation.

 

Service yards:

  • Updating of the command and control software for the regulation of air during oxidation.

 

Conversion of trickling filters

  • Transformation of two trickling filters into combined basins that include pre-denitro, oxidation-nitrification, recirculation of sludge and nitrates, secondary sedimentation.

 

New head lift

  • Construction of a new lifting system for the system.

 

Rainwater treatment

  • Adaptation of an existing basin for rainwater treatment.

 

Project details

 

Customer

Acea Ato 2

Site

Municipality of Santa Marinella

Timetable

Start: Dicember 2021
End: Dicember 2024

Detail of the service

  • Engineering services during the execution of works (Works Management).

 
  • Procurement of services and supplies, and the coordination of all the work necessary to provide the Customer with the finished work in a state-of-the-art manner.


Key numbers

Service execution quota:

 

100% Acea Infrastructure SpA

Amount of works

 

2.839.560,25 € (of which €180,000 are for security costs)

Served population

 

20.000 equivalent inhabitants

Average black water flow rate (Qm)

 

74 l/s

Max biological treatment flow rate (Qbio = 2,0*Qm)

 

148 l/s

 

 

 

Max flow rate to the system (Qmax = 3,1*Qm)

 

230 l/s

Dimensional characteristics of the sections

 

  • number of settlers: 2

  • settler diameter: 15,00 m

  • total area of settlers: 354 m2

  • number of volumes per denitrification: 2

  • volumes for denitrification: 395 m3 ciascuno

  • number of volumes for oxidation and nitrification: 2

  • volumes for oxidation and nitrification: 922 m3

  • number of rain tanks: 1

  • rain tank volume: 66 m3

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