DEVELOPMENT PERSPECTIVES FOR BIOGAS PRODUCTION FROM AGRICULTURAL WASTES IN FRIULI VENEZIA GIULIA (NORTH- EAST OF ITALY)

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1 University of Udine Department of Agriculture and Environmental Sciences DEVELOPMENT PERSPECTIVES FOR BIOGAS PRODUCTION FROM AGRICULTURAL WASTES IN FRIULI VENEZIA GIULIA (NORTH- EAST OF ITALY) D. Dell Antonia, S.R.S. Cividino, A. Carlino, R. Gubiani, G. Pergher University of Tuscia, Viterbo - Italy 8-12 September 2013

2 Introduction Primary energy production of biogas in the EU Landfill Gas Urban Sewage and industrial effluent sludge gas Other biogas Source: EurObserv'ER

3 Introduction Biogas plants in agriculture Ø In 2012, some 994 plants in Italy were producing biogas with a total installed electric power of 750 MW(e) Agricultural plant with agro-industrial byproducts 20% Animal waste 18% Animal waste with agro-industrial byproducts 5% Animal waste with agricultural plant 45% Animal waste with agricultural plant and agro-industrial byproducts 12% Source: Piccinini 2013

4 Introduction Biogas in Italy Ø The Italian Energy Action Plan of 2010 set a target of at least 17% of total energy generated from renewable sources by 2020 Ø The number of anaerobic digestion plants in Italy has increased, in recent years, thanks to the old Italian energy law from 244/2007, which provided an allinclusive feed-in tariff (280 /MWh) for electricity production from agricultural biomass, regardless of the feedstock type and the power of the plants. Ø In July 2012, Italy adopted a new regulation for the production of electricity from biomass

5 Materials and Methods Law 6 July 2012: Ø Feed-in tariffs range from: v a minimum of 91 /MWh v to a max. of 236 depending on: ü feedstock (higher for animal waste and agricultural by-products only) ü power of the plants ü additional reward efficiency rate of energy conversion use of waste heat use of digestate as a fertilizer

6 Materials and Methods Potential of agricultural wastes in FVG Ø Animal waste from livestock (cattle, pigs and poultry) Ø Agricultural by-products (straw and corn stalk)

7 Materials and Methods Agricultural farms in Friuli Venezia Giulia Ø In FVG there are 22,316 agricultural farms Ø Only 3,343 farms are raising livestock v 61.7% cattle v 17.5% pigs v 11.7% poultry v 8% sheep and goats v 4.5% rabbits

8 Materials and Methods Biogas production from animal waste Ø Total number of animals with the relative categories for each municipality v statistical census of agriculture (ISTAT 2010)

9 Materials and Methods Biogas production from animal waste Ø Quantification of slurry and manure production v According to the Law n.109 of 7 April 2006, were defined the wet waste for each type and age of animals Animal type Categories <1 year 150 Waste yield Life weight Housing system (m 3 t.l.w. -1 ) (kg) Slurry Manure Free stall with litter 4 22 Free stall without litter 22 - Cattle 1-2 years 450 >2 years 550 Free stall with litter 10 26,5 Free stall without litter 26 - Free stall with litter 10 26,5 Free stall without litter 26 -

10 Materials and Methods Biogas production from animal waste Ø Factors affecting the amount of waste produced by livestock ü type and age of the animals ü body weight ü type of breeding (e.g. free stall and tie stall) ü total solids ratio ü volatile solids ratio ü availability of waste ü biogas yields

11 Materials and Methods Biogas production from animal waste Ø Biogas production of slurry and manure v Organic matter v Concentration of the methane in biogas Source: AEBIOM, Giraldi 2011

12 Materials and Methods Biogas production from agricultural residues Ø Quantification of total production of straw and corn stalks for the land area in Friuli Venezia Giulia v Statistical census of agriculture (ISTAT 2010) Feedstock Characteristic Corn Soft wheat Durum wheat Rye Barley Oats Rice Sorghum Other cereal Total Land area (ha) Agricultural farms By-products yield (t/ha) 5,5 4,5 4,5 4, ,5 4,5 4,5 - By-products (t/year)

13 Results Biogas production from animal waste Ø Biogas potential from animal waste only is about 38.5 Mio. of (N)m 3 Animal type Biogas production Energy potential (m 3 /year) (%) (GJ/year) (%) Cattle Pig Poultry Total

14 Results Map of biogas production from animal waste Spilimbergo San Vito al Tagliamento

15 Results Map of biogas production Ø The areas with high potential for biogas production are concentrated in Central-Eastern part of the Region Ø High potential due to the presence of intensive farming v San Vito al Tagliamento for pigs and poultry v Spilimbergo for cattle and poultry

16 Results Biogas production from agricultural residues Ø Total biogas potential is about 187 Mio. of (N)m 3 v 21% from animal waste (38 Mio. of (N)m 3 ) v 79% from agricultural residues (148 Mio. of (N)m 3 ) Agricultural residues Corn stalks Straw Animal waste Total Area (ha) By-products (t/year) Biogas (M(N)m 3 /year) Energy potential (TJ/year) Share of energy potential (%)

17 Results Energy potential Ø The biogas produced from agricultural waste may be able to replace the 2.6% of final energy consumption in Friuli Venezia Giulia v 3% of final electricity consumption

18 Conclusions Conclusions Ø This work has been a first step in a more complete evaluation of the biogas potential in Friuli Venezia Giulia Ø Important is to identify the technical and economic convenience of small biogas plants in the regional area ( kwe) in relation to the different conditions in the area Ø In this view, public support for small farms producing biogas and electricity from wastes and by-products is still important Ø The contribution of biogas plants in the livestock sector can be a solution to support the agri-food sector

19 Introduction Thanks Source: Chiumenti