IGW S.r.l. Sofia 9 giugno 2015 PIÙ MODERNI, PIÙ COMPETITIVI, PIÙ FORTI AMBIENTE ED EFFICIENZA ENERGETICA IN BULGARIA Organizzazione a cura di
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;
Biogas production from organic waste recycling, and agricultural waste: Organic Waste Metabolism Where does this energy go? Waste water Manure and slurry Metabolism
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
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
Biogas production from organic waste recycling : Business Case: Agrienergia Bologna (Italy)
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 2.000.000 to 2.800.000 kwh/year
Produzione di Biogas da raccolta differenziata rifiuti Compost Biocells of anaerobic process Co-generation system Storage of Ligno-cellulosic waste Aerobic process Receiving waste
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 30.000 sq.m 33.700 tons/y 8 people 9.700 tons/y 24.000 tons/y 330 kw/h electric 13.500 ton/y 12,59% 8,70%
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 m3 17.613,00 Methane production m3 11.342,00 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
Produzione di Biogas da raccolta differenziata rifiuti Digester 1 Methane production performance Methane concentration in Biogas 80 70 % Methane 60 50 40 30 20 10 0 Days
Produzione di Biogas da raccolta differenziata rifiuti Digester 1 Total production of biogas 18000 16000 Biogas Meter Cube 14000 12000 10000 8000 6000 4000 2000 0 Days
Produzione di Biogas da raccolta differenziata rifiuti Anaerobic Digestion: Production 2015
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 > 80 10 < 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. 84 230 Nickel mg/kg d.m. 53 100 Lead mg/kg d.m. 19 140 Zinc mg/kg d.m. 184 500 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
Produzione di Biogas da raccolta differenziata rifiuti Localization: San Pietro in Casale, Bologna - Italia 280 mt 270 mt 90 mt
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
Wet Anaerobic Digestion By-products from agricultural, could be valorized more easily, and cheaply, through a Wet Anaerobic Digestion system:
Produzione di Biogas da raccolta differenziata rifiuti Thanks for your attention IGW Srl Via Stazione 86/E 26013 Crema (CR) - Tel +39 03731971099 Via Ungheri 19 40012 Caldera di Reno (BO) Tel +39 0510339654 www.igwsrl.eu Claudio Samarati +39 345 4544735 claudio.samarati@igwsrl.eu Follow us on: