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OLIVE POMACE OPPORTUNITIES IN THE ENERGY FIELD
Dr.Kostas KONSTANTINOU,Regional
Energy
Agency
of
Central
Macedonia
ANATOLIKI
S.A, email:reacm@anatoliki.gr,http:www.anatoliki.gr Tel.+302310463930
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Olive cultivation is one of thelargest and most important Greekagricultural sectors, with nationalannual olive oil production about
400.000 t.
Olive pomace oil potential isestimated based on the assumptionthat olive pomace oil is production
is about 8% of the olive oilproduction (32.000tn)
InGreece
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The majority of the olive oil extraction mills use the three-phaseextraction technology system(Aprox. 3,2% uses the traditional extraction system, 2,4% uses the 2-phase
system & 94.4% uses the 3-phase system).
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In the Island of Crete, exist ten (10) operational pomace oil refineries andthe overall processed virgin pomace amount is estimated at 200.000tnannually with small fluctuations from season to season.
From this quantity,100.000tn depleted pomaceis produced of which aprox.
50% is being consumed inthe refineries as fuel and therest is sold to the localmarket at a relatively lowprice (50 /t).
By comparing energy cost forheating, olive pomace has asignificant advantage over diesel as
the heat content per Euro is
15.454 kcal/ for heating diesel(market price 0,60 /L) and
81.020 kcal/ for olive pomace.
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THE OLIVE CHAIN IN GREECE
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OliveMills
Virginpomace
Pomace oilRefineries
Virgin
pomace
Dried
pomace
Exhausted
pomace
Drying
phase
Pomace oil
extraction
15
/tn
50
60/tn
Exhausted
pomace
Water
Heating
Exhausted
pomace
GREENHOUSEHEATING,ALCOHOLICBEVERAGE
BOILERS,SPACEHEATING,BAKERIES etch
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In Greece at old times pulp was used as animal feed and for this reasonpomace oil refineries were separating the pit from the pulp after the pomaceoil extraction. Nowadays pulp which isnt used as feed, is burned with the pit.
In Spain the separation of pit from pulp is taking place after the olive oilextraction this is due to the fact they use decanters which in Greece areconsidered as expensive for their small production in comparison with Spain.
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Abea is a 120 years olive oil industrylocated at Chania, in the island ofCrete.
The industry sells besides olive oil,pomace oil, olive soaps and depletedpomace
Abeas pomace refinery isthe 1st in Greece which useddepleted pomace as a fuel
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At the pomace oil refinery virgin pomace is dried and the moisturecontent is reduced from 50% to ~12%
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~50% of the depleted pomace produced is used during the drying phaseof virgin pomace.
31% is used at the drier and 19% for the production of steam
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After the drying phase a solvent is used in order to extract pomace oilfrom the pomace. The price for pomace oil is 650/tn
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This final product contains: pulp, pits and humidity ~12%In the market this product can be found with several names such as: olivekernel wood, exhausted pomace or depleted pomace.
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Pomace oil refineries are energy autonomous
Total thermal energy consumption: 150*10 ^9 Kcal
Total electricity consumption: 2*10^9 Kcal
Thermal: 98,8%Electical: 1,2%
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The final product has an energy content of 3.500-4.000 kcal/kg, (16MJ/kg), (4,4 kWh/kg).
The refineries in the island of Crete produce annually ~100.000tndepleted pomace.
Equals to 350*10^9 Kcal
The available amount of depleted pomace to enter the market is~57.000 tn
Equals to 200*10^9 Kcal
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LOCATION: GREVENA
PRODUCT: MEDIUM-DENSITYFIBREBOARD (MDF)
BIOMASS SOLID FUEL: WOODWASTE
OIL BOILER TOTAL THERMALPOWER : 7,5 MWth & 10 MWth
HEAT EXCHANGERS : OIL-STEAM 12tn/h, 18 bar
THERMAL OIL OUTPUTTEMPERATURE: 270 C
ANNUAL ENERGY SAVING : 6.000 tnFUEL OIL ()
ALFA WOOD Pindos
OPERATION YEAR: March 2006
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Storing SILOS
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FUEL FEED
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Burning Chamber
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Drier
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Boiler room
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Biomass Boilers
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Boiler room equipment
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Bag type filters
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Boiler 1 (7,5 MWth
)
Visual Control System PLC-SCADA
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Boiler 2 (10 MWth
)
Visual Control System PLC-SCADA
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Visual Control System SCADA
Exhaust gases cleaning system
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CHP graphORGANIC RANKINE CYCLE (ORC)
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ORC Unit
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ALFA WOOD NEUROKOPI
LOCATION: DRAMA
PRODUCT: PELLETS & COLOURED WOOD CHIPS
BIOMASS SOLID FUEL: WOOD WASTE
BURNER TOTAL THERMAL POWER : 7,5 MWth
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General view of the plant
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Fuel Feed
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Burning chamber
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Burning chamber
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Burner
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Thank you All
Dr.Kostas KONSTANTI NOUTechnical Director
I rene TSAKI RI DOUDipl.Mechanical Engineer
Regional Energy Agency of Central Macedonia-ANATOLI KI S.A
Info regarding the biomass implementations were kindly
provided by N.ACH.PHILIPPOPOULOSa company which designs and constructs industrial units forthe energy utilization of Biomass, with 33 years of specialist
experience and more than 100 executed projects.www.nphilippopoulos.gr, www.biomass.com.gr , www.solid-
waste.eu , www.biomass-technology.eu
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