IGW S.r.l. Sofia 9 giugno 2015 PIÙ MODERNI, PIÙ COMPETITIVI, PIÙ FORTI AMBIENTE ED EFFICIENZA ENERGETICA IN BULGARIA. Organizzazione a cura di

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1 IGW S.r.l. Sofia 9 giugno 2015 PIÙ MODERNI, PIÙ COMPETITIVI, PIÙ FORTI AMBIENTE ED EFFICIENZA ENERGETICA IN BULGARIA Organizzazione a cura di

2 IGW Srl is a service company that deals with the production of energy from renewable sources, environment and consultancy in the technical, administrative, organisational, commercial and management areas in the sector of costruction and infrastructures. IGW through the experience of its expert technicians, provide: - Feasibility study and build permitting; - Plan and design of renewable energy plants; - Plan and build wastewater treatment plants for agri-food industry - Works supervisor during building of renewable energy plants; - Technical assistance; - Upgrading and efficiency of existing plants;

3 Biogas production from organic waste recycling, and agricultural waste: Organic Waste Metabolism Where does this energy go? Waste water Manure and slurry Metabolism

4 Main technologies: Wet d.m. < 15% Table 3.2: advantages and disavantages of wet processes(vandevivere et al. 2001) Criteria Advantages Disavantages Technology Good knowledge and experience in the process; Applicability in co-digestion with liquid waste with a high organic matter content; Short-circuit hydraulic; Separate phases of floating and heavy matter; Abrasion of the mechanical parts due to the presence of sand and aggregates; Pre-treatment of the preparation of waste complex; Biological Dilution of concentration peaks of the substrate and / or toxic substances that affect the tank; Strong sensitivity to any shocks to the presence of inhibitory substances and organic loads variables that come into intimate contact with the biomass ; Loss of volatile substance biodegradable during the pre - treatments Economic and environmental Reduced charges for pumping and mixing, worldwide on the market High investment costs due to the equipment used for the pre-treatment and for the volumes of the tank ; Production of high amounts of process water

5 Main technologies: Dry d.m. > 40% Tabella 3.7: advantages and disavantages of dry processes(vandevivere et al. 2001) Criteria Advantages Disavantages Technology No need for internal mixers to the reactor; Strength and resistance to heavy aggregates and plastics; No short- circuit hydraulic Wastes with low solids ( < 20 % TS ) cannot be treated by themselves ; Biological Low loss of biodegradable organic matter in the pre - treatments ; High OLR applicable ; Resistance to substrate concentration peaks and toxic substances A chance to dilute the inhibitory substance and organic loads with excessive fresh water ; Economic and Environmental Pre - treatments minimum and cheapest ; Reduced volumes of the reactors ; Reduced use of fresh water ; Minimum required heating of the reactor High investment costs due to the equipment used for the treatment

6 Biogas production from organic waste recycling : Business Case: Agrienergia Bologna (Italy)

7 Agrienergia Process Dry anaerobic digestion: Organic waste recycling Aerobic process C6-H12-O6 Anaerobic process C6-H12-O6 Other organic waste CH4 CO2 Fertilizer Electric Energy Production from to kwh/year

8 Produzione di Biogas da raccolta differenziata rifiuti Compost Biocells of anaerobic process Co-generation system Storage of Ligno-cellulosic waste Aerobic process Receiving waste

9 Produzione di Biogas da raccolta differenziata rifiuti Technical details: Agrienergia Investment: Total Area: Potential treatment: Total workers: Biocells anaerobic capacity: Aerobic treatment capacity: Power generation: Compost production: ROI 31/12/2013: ROE 31/12/2013: 4 mln sq.m tons/y 8 people tons/y tons/y 330 kw/h electric ton/y 12,59% 8,70%

10 Produzione di Biogas da raccolta differenziata rifiuti Fermentation in Biocell Digester 1 Technical details / 176,22 m3 / 132,16 tons 202,64 m3 / 151,98 tons Organic recycling waste 40% Digestate 46% / Ligno-cellulosic waste 14% / 61,67 m3 / Biogas production m ,00 Methane production m ,00 Methane medium production m3/h 24,46 % Medium of Methane in Biogas 64% Biogas production m3/tons Medium temperature in the Biocell Time of fermentation Days 138,50 m3/tons 41,5 C 30 46,0 tons

11 Produzione di Biogas da raccolta differenziata rifiuti Digester 1 Methane production performance Methane concentration in Biogas % Methane Days

12 Produzione di Biogas da raccolta differenziata rifiuti Digester 1 Total production of biogas Biogas Meter Cube Days

13 Produzione di Biogas da raccolta differenziata rifiuti Anaerobic Digestion: Production 2015

14 Produzione di Biogas da raccolta differenziata rifiuti Compost produced is a good soil amendent/fertilizer: Parameters U.M. Agrienergia Italian Regulation Limits : Humidity % ph 14 < 50 6,2 6-8,5 Organic Carbon % s.s. 30 > 20 Carbon humic and fulvic % s.s. 10 >7 Organic N in dry % Ntot 90 > < 25 C/N Salinity ds/m 55 To declare Plastic glass and metal > 2 mm % s.s. < 0,5 < 0,5 Inert lithoid > 5 mm % s.s. 2 <5 Absent Absent CFU/g < 100 < 1000 % 86 > 60 Cadmium mg/kg d.m. 0,5 1,5 Copper mg/kg d.m Nickel mg/kg d.m Lead mg/kg d.m Zinc mg/kg d.m Mercury mg/kg d.m. 0,3 1,5 Chromium VI mg/kg d.m. < 0,1 0,5 Salmonella in 25 gr. of f.w. Escherichia coli in 1 gr of f.w.. Index of germination

15 Produzione di Biogas da raccolta differenziata rifiuti Localization: San Pietro in Casale, Bologna - Italia 280 mt 270 mt 90 mt

16 Agrienergia is located close to household and 2 km far from San Pietro in Casale town. Welfare of citizen is guaranted from the waste treatment in close and kept in depression building; polluted air is treated in Scubber and Biofilter before being discharged in atmosphere. Scrubber Biofilter

17 Wet Anaerobic Digestion By-products from agricultural, could be valorized more easily, and cheaply, through a Wet Anaerobic Digestion system:

18 Produzione di Biogas da raccolta differenziata rifiuti Thanks for your attention IGW Srl Via Stazione 86/E Crema (CR) - Tel Via Ungheri Caldera di Reno (BO) Tel Claudio Samarati claudio.samarati@igwsrl.eu Follow us on: