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Viveracqua - Efficient Sludge Management Solutions in Veneto

Viveracqua is the leading consortium company for integrated water service in Veneto, providing joint solutions to communal requirements. With 12 companies under public ownership, Viveracqua maintains efficiency, connects with the territory, and serves over 4.8 million inhabitants in 589 municipalities. Through ongoing activities, Viveracqua aims to optimize sludge production and implement a new sludge supply chain management system, requiring investments of around €110 million.

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Viveracqua - Efficient Sludge Management Solutions in Veneto

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  1. Viveracqua scarl is the consortium company of managers of the integrated water service in Veneto, and creates a stable collaboration, provides joint solutions to communal requirements, maintains efficiency and connects with the territory to achieve a large, competitive capacity • 12 companies with total public ownership • small to medium size • in-house credit facilities Viveracqua - regional project • June 2011 • 2 partners, 108 municipalities • 1.1 million inhabitants served • December 2017 • 12 managers • 4.8 million inhabitants served • 589 municipalities

  2. Viveracqua - sludge production • Over 160 purification plants generate dehydrated sludge to be disposed of. • About 310,000 tons per year of dehydrated sludge is produced in total, of which: • about 235,000 are damp (with average dry content = 23%), and are sent to recovery operations (AGRICULTURE AND COMPOST) • about 40,000 are wet (with average dry content = 23%), and are sent for disposal (LANDFILL OR INCINERATION) • about 35,000 are dried (with average dry content = 85%), and are sent for disposal (LANDFILL OR INCINERATION)

  3. Viveracqua - ongoing activities • Implementation of a new sludge supply chain management system, with the creation of some “hubs” and the conveying of sludge to smaller plants without deep treatments. • The hubs could be made up of: • External sludge accumulation tank, including for sludge produced by the hub • Odour abatement system, also for diffused emissions • Hydrolysis • Drying • Treatment plant for sewage with high nitrogen load • To create a hub of the size closest to the optimal (about 20,000 tons per year of treated wet sludge), about 14 plants will be needed. • As a guideline, therefore, about five years and investments of around €110 million will be needed to build the hub.

  4. Viveracqua - ongoing activities To create a hub of the size closest to the optimal (about 20,000 tons per year of treated wet sludge), about 14 plants will be needed. As a guideline, therefore, about five years and investments of around €110 million will be needed to build the hub. After the proposed interventions, the total sludge produced could vary, depending on the level of drying, from around 100,000 to 150,000 tons per year

  5. Viveracqua - ongoing activities • A study has been launched on future disposal strategies for sludge: • analysis of alternative solutions, taking into account the available technologies and the quantities involved • identification of the overall disposal solution • estimate of investment costs and completion times

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