Waistewater Treatment Plant Messina District

Due to the high extension of Messina city, it includes several wastewater treatment plants. In particular, there are two plants very important for location and dimension; they are called “Mili Marina” and “Santo Saba”.

Following the new Italian Environmental Law (dated 2006) the Municipality of Messina decided to upgrade the above mentioned plants.

Wastewater treatment plants require a multidisciplinary approach due to the number of different components concerned: hydraulic works, structural and geotechnical works, electromechanical, electrical and remote-control systems, chemical reactions and biological processes, environmental impact mitigation measures to limit atmospheric and acoustic emissions. The projects carried out regard a plants type “activated sludge”.

The Mili Marina’s plant is designed for 340.000 inhabitants, and the daily pick flow is about 3.400 cubic meter per hour, and the average Biochemical Oxygen Demand (BOD), at the inlet, is 180 mg/l.

The wastewater treatment plant of “Santo Saba” is small, and the actual capacity is 2.500 inhabitants. The urban area, linked to the plant in object, has a great valence for naturalistic reasons, and for that in the summer period the people who lives in the area is about 12.000 units. The project provides an important extension of the existing structures, and in detail the design includes: pre-treatment, primary treatment, secondary treatment with activated sludge, biological aerated filters, secondary sedimentation, and disinfection.