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Precise theme tackled by the practice: 
Renewable Energy - The small municipality of Cloz (Valle di Non) decided to use apple trees stumps to feed a 100 KW biomass boiler
Location
Country: 
Italy
Region or District or Metropolitan Area or Municipality: 
Provincia Autonoma Trento
Detailed description of the practice
Description of the practice: 
The cultivation of apple trees in Valle di Non covers an area of about 6,400 hectares and an annual production of 3,000,000 tons, which representing 10% of the apples produced in Italy. in the late nineties appeared in the orchards of the valley a dangerous phytoplasma, responsible for a disease which causes a drastic qualitative decay of apples produced and for which there is currently no possible treatment: the affected plants should be grubbed up and replaced. In 2004 a legislation decided to regulate the extirpation of trees: only in Val di Non the trees which should be replaced correspond approximately to a surface of 1,000 hectares: about 200/300 hectares each year. Estimating an average weight of 150-200 kg / each tree stump, the resulting production of woody biomass is around 45-60 t / hectares, and around 13,000 t/year in the entire valley.
Evaluation
Possible demonstrated results: 
Usually, the stumps of apple trees are not used for biomass and energy purposes, farmers uses trunks and branches for their own needs (firewood, …) but stumps are too big to be cut and the transformation in biomass is too laborious: very often stumps are burned directly in the agricultural fields. The small municipality of Cloz decided to use this wood to feed a Biomass boiler of 1KW used for heating public buildings which have been field with local woodchips until 2004.
Lessons learnt from the practice: 
• Local development : this project created new incomes for the local company which is managing the area and Savings for the Municipality which don’t need anymore to spend public money to feed the heating system (biomass boiler). • Continuity: the municipality already start to project new activities in order to ensure the continuity of supply. For example: stumps of larch have been collected from agricultural reclamation activities and in the future will incorporate crops residues to ensure the continuity of supply. • How is it possible that this poor quality material can be used in modern boiler with automatic feeding? It seems that some simple measure are sufficient: with the rakes systems, support to the piston, … In conclusion, even a coarse material such as dirt and produced by the shredder can give excellent energy response, even best of waste from sawmill that have a higher market price.
Contact information: 
Maria Floretta (Muncipality of Cloz): comunedicloz@tin.it
Other possible interesting information
Website: 
www.comune.cloz.tn.it

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