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Precise theme tackled by the practice: 
Biogas production and heat generation
Objectives of the practice: 
Threatment of wastewater to use the heat for the offices at the wastewater plant.
Location
Country: 
Italy
Region or District or Metropolitan Area or Municipality: 
Rovereto (Trento)
Detailed description of the practice
Description of the practice: 
The Trentino province has an important network of wastewater depuration plants all over its territory. The Rovereto plant uses the sludge produced by the wastewater line for the production of biogas. The anaerobic section is composed by 2 mesophilic reactors with 21 day of HRT. The biogas produces heat , which is used for the consumptions of the AD plant and to heat the offices of the wastewater plant. The solid part of the digestate is dried or used in agriculture. In 2013 the treatment line will be implemented with the anaerobic digestion of kitchen waste source selected in the Rovereto municipality (5000 tons/year). After a pre-treatment step in a new type of shredding and screening machinery, the organic fraction will be added to sewage sludge and sent to the anaerobic reactor. The biogas will be addressed to an engine for power and heat generation (CHP).
Lessons learnt from the practice: 
It is one of the two AD plants present in the wastewater treatment network in operation in Trentino. It can be considered as a good example both due to the recovery of energy from the digestion of sewage sludge and the future treatment of food waste for increasing the green energy production. It meets the EU trends towards 2020 and beyond 2020 which stress the priority in the treatment of waste biomass and residues for renewable energy production.
Contact information: 
Giovanni Battista Gatti; giovanni.gatti@provincia.tn.it
Other possible interesting information
Website: 
www.provincia.tn.it
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The Interregional Cooperation Programme INTERREG IVC, financed by the European Union’s Regional Development Fund, helps Regions of Europe work together to share experience and good practice in the areas of innovation, the knowledge economy, the environment and risk prevention. EUR 302 million is available for project funding but, more than that, a wealth of knowledge and potential solutions are also on hand for regional policy-makers.