Bio-Fuel and CO2 Capture by Algae - The University...
Transcript of Bio-Fuel and CO2 Capture by Algae - The University...
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Bio-Fuel and CO2 Captureby Algae
Ami Ben-AmotzNASA
November 20, 2008
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MicroalgalApplied Phycology
Since 1950 through 2008 almost all commercial algae
production plants use only open ponds
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Commercial Photo-BioreactorsExamples of Failure
&High Cost
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Chlorella, Otto Pulz, Germany
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Haematococcus, Algae Technologies, Israel
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Dunaliella, Murcia, SpainUS$ 10 million loss
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Murcia, Spain Major problems: predators and contamination
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Murcia, Spain1990
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Murcia, SpainNever worked commercially
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GreenFuel Technologies Co, Arizona, USAphoto-bioreactors on start
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GreenFuel Technologies Co, Arizona, USAFew weeks later, heavy contamination, difficulty to clean
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GreenFuel Technologies Co, Arizona, USABags trial, high cost scale up
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GreenFuel Technologies Co, Arizona, USAUS$ 10 million project, 2007
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GreenFuel Technologies Co, Arizona, USAMajor problem: summer cooling
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CommercialAlgae
Open Ponds
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Open Pondssince 1950
Taiwan & Japanround & oblong open ponds
mostly mixotrophic cultivation
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Far East Chlorella and SpirulinaOpen Ponds
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Earthrise Spirulina, Imperial Valley, CA, USA
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Cyanotech Co Hawaii, USA
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Microbio Resources, Imperial Valley, Calipatria, CA, USA
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Cognis Dunaliella, Whyalla, Australia
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Cognis, Whayalla, Australia Large Scale Dunaliella Cultivation
Harvesting Facilities
Algae CultivationSalt bottom
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Dunaliella, Hutt Lagoon, West Australia
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DunaliellaHealth Food Supplement
Commercial Plant
Intensive Cultivation
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NBT Ltd., Nikken Sohonsha Co. (1975) Dunaliella 10 Hectares Plant, Eilat, Israel
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∫hν x dt
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Dunaliella Scale Up
30m2
100m2
300m2
1,000m2
1,500m2
3,000m2
3m2
3,500m2
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Dunaliella Biotechnology PC Control
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DunaliellaBiotechnology
rocessing
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Dunaliella Harvesting Westphalia Ltd., Continuous Centrifuges
60m3/hr
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Dunaliella Paste (~15%)
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Dunaliella Spray Dryer
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DunaliellaSpray Dried β-Carotene Algal Powder
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Japan & Far East Market Price ~$4,000/kg algal AFDA
(β-Carotene Health Food)
Raw algaeIsrael
Japan
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Dunaliella β-Carotene Capsules100 yen/capsule
300 mg dry powder/cap20 mg β-carotene9-cis/all-trans 1:1
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Dunaliella Health Food Powder Door to door marketing by 500,000 sale agents in the Far East
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Open Ponds & Closed Bioreactors
The key Questions:
Cost of construction & operationLight
ContaminationCleaning
MaintenanceProductivity
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Nature Beta Technologies Ltd. (NBT)Nikken Sohonsha CoSharing our know-how
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Alternative Algal Plant2008(?)
DunaliellaNBT Ltd., Eilat, 2008
Cost in US$/year?500,000
(20 workers) Manpower
?180,000 Electricity ($0.125/KW)
?36,000 Fertilizers (N,P,K, Fe) and other chemicals
?50,000 Domestic Land City Taxes
?150,000CO2 ($500/ton)
?200,000Sea Water ($0.25/m3)
?20,000Fresh Water
?30,000Other supplies and Miscellaneous
?1,166,000Total
?70 tons(2g/m2/day)
Yearly production of dry algae biomass
$0.34/kg ???$17.00/kgCost of 1Kg dry microalgae
Algae cost for bio-fuel should be below
$0.5/kg algal AFDW
$4,000/kg algal AFDA(β-Carotene Health Food)
Total sale ~$100 million/year
Market Price
Annual Microalgae Production Costs NBT Dunaliella Plant versus Alternative Bio-Fuel Algal Plant
(10 Hectares Plant Open Ponds)
Annual Microalgae Production Costs NBT Dunaliella Plant versus Alternative Bio-Fuel Algal Plant
(10 Hectares Plant Open Ponds)
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How to reduce the
Cost of Algae Production?
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Electric Power StationsBurn: oil, gas, coal and mix
Use: sea water for cooling
Average mid-large station emits ~ 4,000 ton CO2 per hr
CO2 emission, 4-14%, plus NOx, plus minerals, plus?
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CO 2
Algae ? Flue Gas
CO2
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The “Algal Bible”:“Algal Culture, From Laboratory to Pilot Plant”
John S. Burlew (Ed.), 1953:“Flue Gas is Toxic to Algae”! SO2 & H2S toxicity
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Flue Gas Desulphurization (FGD, SO2 Scrubbing) FGD is the current state-of-the art technology used for removing sulfurdioxide
( SO2 (from the exhaust flue gases in power plants that burn coal or oil to generate generatorsneratorsthe steam for the steam turbines that drive their electricity ge
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Flue Gas Desulphurization (FGD SO2 chemistry)Scrubbing with a basic solid or solution
SO2 is an acid gas and thus the typical sorbent slurries or other materials used to remove the SO2 from the flue gases are alkaline.
The reaction is taking place in wet scrubbing using limestone, CaCO3 to calcium sulphite, CaSO3 that can be expressed as:
CaCO3 (solid) + SO2 (gas) → CaSO3 (solid) + CO2 (gas)
When wet scrubbing with a Ca(OH (2) lime slurry), the reaction also produces CaSO3(calcium sulphite) and can be expressed as:
Ca(OH)2 (solid) + SO2 (gas → ) CaSO3 (solid) +H2O (liquid)
When wet scrubbing with a Mg(OH (2) magnesium hydroxide slurry), the reaction produces MgSO3 (magnesium sulphite) and can be expressed as:MgOH2 (solid) + SO2 (gas) →MgSO3 (solid) + H2O (liquid)
Some FGD systems go a step further and oxidize CaSO3 (calcium sulphite) to produce marketable CaSO4.2H2O (gypsum):
CaSO3 (solid) + 1/2 O2 (gas) + 2H2O (liquid) → CaSO4.2H2O (solid)
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Israel Electric CorporationFour Power Plants all coal
One is FGD Plant (Ashkelon)
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Seambiotic Algae Pilot PlantWithin the IEC Power Plant area, Ashkelon, Israel
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IEC Power Plant Ashkelon, IsraelOnly one FGD chimney (out of 8 in Israel)
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Sea
shore
IEC CO2- Generation Basic Scheme
“Please make holes in the smokestack for algae”
Smoke fan ashcollectorFlue gas
Microalgae pond
FGD
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Israel Electric Corporation The connections to the chimney
(FGD 2 units)
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Ruthenberg Power Station, Units III&IV. Unit Nominal Load 550MW I. Coal LHV = 6170 kcal/kg C,% = 65.26 H2O,% = 10.99 H,% = 4.53 Ash,%= 8.85 S,% = 0.63 N,% = 1.25 O,% = 8.49 II. Theoretical Flue Gas Composition.
Excess Air=
100.00%
V0= 6.74 V0CO2= 1.22 @6%O2 Alfa = 1.4
V0H2O= 0.748 V0
N2= 5.33 V0
SO2= 4.41E-03
V0dry= 6.55
Vgasalfa= 8.743 Vgas6%O2= 10.04 III. Real Gas Composition (Gas temperature 140 -50 C, density 1.3 kg/m3). Unit Load 550MW 341MW 181MW Excess Air 1.21 1.44 1.7 Calculated Measured Calculated Calculated Before FGD After
FGD Before FGD After
FGD Before FGD After FGD
Gas Volume, Nm3/kg fuel 8.743 10.04 10.318 11.59 12.10 13.52
CO2,% 13.93 12.13 13.30 11.802 10.51 10.07 9.01 O2,% 16.19 14.10 4.7-5.12 6.04 5.37 8.19 6.10 N2,% 0.11 0.10 - 74.41 66.25 74.90 67.03
H2O,% 7.31 22.31 - 7.71 19.33 6.81 19.19 SO2,ppmv 504.23 - 56-70 427 - 364.37 -
H2S,% ~0 - ~0 ~0 ~0 NOx,ppmv 297.00 300 190-200 292 260 249 223
SO3,mg/Nm3 ~5 CO,mg/Nm3 287 ~250 243 208 186 CHcondensable No data No data No data No data
Sulfur ~0 ~0 ~0 ~0 Particles,mg/Nm3 46
FGD Power Station, Ashkelon, Israel (431 ton CO2 /hr, 10,344 /day)
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Flue Gas Processing Inside the FGD Chimney
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Analysis of the FGD Flue Gas Mist Many Minerals at Low pH
(variety of coals)
Mist (H2O)Flue Gas13% CO2
NOxMineralsLow pH
?
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Ponds on Construction
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Ponds on Construction
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PVC Liner
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FGD GasFrom the Chimney to the Algae Ponds
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IEC Power Plant Free Seawater Supply ~ 450,000 m3/hr
(Filtered & Chlorinated)The Pumps
Sea water
Production Cost
Manpower
Electricity ($0.125/KW)
Fertilizers (N,P,K, Fe) and other chemicals
Domestic Land City Taxes
CO2 ($500/ton)
Free Sea Water
Fresh Water
Other supplies and Miscellaneous
Total
Yearly production of dry algae biomass
Cost of 1Kg dry microalgae ?
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IEC Power PlantFlue gas
Free NOX
N fertilizer(?)Production Cost
Manpower
Electricity ($0.125/KW)
Fertilizers (N,P,K, Fe) and other chemicals
Domestic Land City Taxes
CO2 ($500/ton)
Free Sea Water
Fresh Water
Other supplies and Miscellaneous
Total
Yearly production of dry algae biomass
Cost of 1Kg dry microalgae ?
?
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NannochloropsisEustigmatophyceae
Bio-Fuel or High W3 FA, EPA
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Stock Algae Culturesin house
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Stock Algae Culturesoutside
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Scale-Up Cultivation of Nannochloropsis sp
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Coal Burning FGD Flue Gas Superior Algal Growth!
Algal density at depth of 20 cm ~ 1g algae/L
Production Cost
Manpower
Electricity ($0.125/KW)
Fertilizers (N,P,K, Fe) and other chemicals
Domestic Land City Taxes
*Free FGD CO2Sea Water ($0.25/m3)
Fresh Water
Other supplies and Miscellaneous
Total
Yearly production of dry algae biomass
Cost of 1Kg dry microalgae ?
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1. Pure CO22. Flue gas
3. Flue gas from the Power Plant 4. Flue gas
0
0.2
0.4
0.6
0.8
1
1.2
1.4
Pure CO2 Flue gas of burner Flue gas of Flue gas of burner
IEC Power Station
g bi
omas
s/L
Nannochloropsis Grows better on Coal FGD Flue Gas than on Pure CO2
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Coal FGD Mist Minerals Content “Coal Extract” superior to “Soil Extract”
13.3 % CO2200 ppm NOx
MineralsLow pH
?
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Natural Selection of Microalgaeby season and by the coal
Spring-Summer Diatoms (brown/black)
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Diatoms Self Selected algae by the specified coal FGD flue gas
(spring-summer algae)
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Coal FGD Algae Selection2005-2008
Dunaliella, ChlorophyceaeTetraselmis, Chlorophyceae
Nannochloropsis, EustigmatophyceaeNannochloris, ChlorophyceaeChlorococcum, ChlorophyceaeSkeletonema, Bacillariophyceae
Navicula, Bacillariophyceae,
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Average Yearly Productivityof
unicellular marine algaeon
FGD flue gasin
open ponds~20 g x m2 x day-1
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Photosynthetic Limitation of Long Term Algal ProductivityMax Theoretical Algal Productivity
25 g/m2/day
(%) Reduction Environment Factor 100 ------- Solar light 90 10% Scattering and reflecting properties of surface 45 50% Absorption spectrum (depth of culture)
11.3 75% Photosynthetic efficiency (25%) 4.5 60% Light saturation (7-95%) 4.3 5% Respiration, photo-respiration, excretion 3.8 10% Photo-inhibition 3.1 20% Temperature
=========================== ================================== Productivity
4,000 kcal/ m2/day Mean daily solar intensity 120 kcal/ m2/day Energy productivity at 3% efficiency
25 g/m2/day Algal biomass productivity (5 kcal/g) Dunaliella Productivity NBT, 2 g/m2/day
Flue gas Algae Productivity, 20 g/m2/day(Terrestrial plants productivity is up to 5 g/m2/day)
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Low Cost Algal Harvesting?
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Basket Centrifuge
Decanter Centrifuge
Algae Centrifuges of Lower Cost
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Auto-flocculation(Diatoms)
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Harvesting by Floc-Filtration
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Dunaliella induced Flocculation
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Dunaliella Biopolymer-Flocculation
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Co-Bio-Flocculation Nannochloropsis & diatoms
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Seambiotic/IEC Plant(estimated)
DunaliellaNBT Ltd., Eilat
Cost in US$/year120,000
(8 workers)500,000
(20 workers)Manpower
30,000180,000 Electricity ($0.125/KW) & residual energy
36,00036,000 Fertilizers (N,P,K, Fe) and other chemicals
10,00050,000 Domestic Land Taxes
5,000150,000CO2
5,000200,000Sea Water
10,00020,000Fresh Water
20,000 30,000Other supplies and Miscellaneous
236,0001,166,000 Total
700 tons(20g/m2/day)
70 tons(2g/m2/day)
Yearly production of dry algae biomass
$0.34$17.00Cost per 1Kg dry microalgae
For Bio-Fuel cost should be below
$0.5/kg algal dw
$4,000β-Carotene Health Food
Market Price
Annual Microalgae Production Costs NBT Dunaliella Plant versus Seambiotic/IEC FGD Plant
(10 Hectares Plant)
Annual Microalgae Production Costs NBT Dunaliella Plant versus Seambiotic/IEC FGD Plant
(10 Hectares Plant)
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From the Algae to
Bio-Fuel
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Seambiotic made algae available in large quantity
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Seambiotic frozen algae stock 7 tons/1,000m2/year
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Extraction and Processing of lipids and carbohydrates
to bio-diesel & bio-ethanol & proteinAlgal paste (a few tons) were shipped frozen or dried
from Seambiotic Ltd., Israel
toprocessing trials
Israel
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Nannochloropsis,Bio-Diesel Seambiotic & Inventure
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Nannochloropsis Bio-Diesel (marine algae smell)
Certificate of Analysis
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Algae Bio-Ethanol
Seambiotic Ltd.
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From the Algae through lipids
Acid Transesterificationto
“Protein”
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Dried Algae
אבקה
Diatoms Nannochloropsis
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Nannochloropsis High Value Protein, (essential amino acids)
University of Alabama, Drs’ Rusty Sutterlin & Thomas MawhinneyUnits W/W% W/W%Dept # Insolubles Solubles
Taurine 0.00 0.01Hydroxyproline 0.00 0.00Aspartic Acid 0.00 0.03Threonine 0.00 0.00Serine 0.00 0.00Glutamic Acid 0.14 1.94Proline 0.04 1.13Lanthionine 0.00 0.05Glycine 0.02 0.66Alanine 0.04 1.24Cysteine 0.01 0.01Valine 0.03 1.26Methionine 0.00 0.02Isoleucine 0.01 0.43Leucine 0.04 1.80Tyrosine 0.02 0.64Phenylalanine 0.03 0.95Hydroxylysine 0.04 1.42Ornithine 0.00 0.16Lysine 0.03 0.44Histidine 0.00 0.04Arginine 0.01 0.07Tryptophan < 0.04 0.42
Total 0.46 12.72
Crude Protein* 8.73 41.80
* Percentage Nitrogen X 6.25. W/W%= grams per 100 grams of sample.Results are expressed on an "as received" basis unless otherwise indicated.
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Flue Gas Microalgae Gross Chemistry
Protein (food & feed) 20-50%
Cellular Lipids (bio-diesel) TG, DG, MG, Polar & Neutral
8-50%Cellular Carbohydrates (bio-ethanol)
20-50%
Chlorophyceae: Starch (α (1→4) glucose unitsMost other classes: Chrysolaminarin (β (1→3) glucose units
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MicroalgaeCommodity Market Potential Value
33% Protein (feed), US$ 1.0/kg = $ 0.3
33% Lipids (bio-diesel), 1.2 US$/L = $ 0.4
33% Carbohydrates (bio-ethanol), US$ 1.0/L = $0.3
Total ~ US$ 1.0/kg algae
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Lower CAPEXLarge Scale Algae
Open Ponds
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Alternative Algal PlantCapital Cost in US$Category
Health Food DunaliellaNBT Ltd., Eilat, 2008Capital Cost in US$
Category
0Land0Land
30,000Sea water and piping,outsourcing,
200,000*Seawater Pumps and Underground Pipes, 4,000 m3/day(1 km from the sea), ~$100/m*
200,000Flocculation2,000,000Centrifuges, 4 x SS Clarifiers, 1,500m3/day
150,000Ground work & Clay, Salt
1,500,000Ground Work & Liner, PVC Food Grade & Cloth, $15/m2
50,000Flue gas and piping,outsourcing
150,000Pressurized CO2 Containers , 2 x 15 tons, $50,000/unit, piping
?Drying?Power plant, outsourcing
450,000Spray Drier, 300L/hr, plus LP Gas Container$250,000/unit
200,000?Infrastructure?1,000,000Infrastructure, air, pipes, pumps, containers paddle wheels, sensors, control , power room, PC room
500,000Buildings1,000,000Buildings: office, laboratory, processing, maintenance, control
300,000Others300,000Others, including recycling salt, $0.3ML
1,430,000(?)Total6.600,000Total
14.3(?)Capital Cost, US$/m266.0Capital Cost, US$/m2
Capital CostsDunaliella Plant versus Alternative Bio-Fuel Algal Plant
(10 Hectares Plant Open Ponds)
Capital CostsDunaliella Plant versus Alternative Bio-Fuel Algal Plant
(10 Hectares Plant Open Ponds)
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Capital CostsBio-Fuel Microalgae Plant
Land & OutsourcingCategory
Land, Desert Land ?
Seawater Pumps and Underground Pipes, Outsourcing: Desalination Plant, Salt Industry
Centrifuges, 4 x SS Clarifiers, 1,500m3/day
Liner, Clay, Salt
Pressurized CO2 Containers , 2 x 15 tons, $50,000/unit
Spray Drier, 300L/hr, plus LP Gas Container$250,000/unitInfrastructure, air, pipes, pumps, containers paddle wheels, sensors, control , power room, PC room, $1ML
Buildings: office, laboratory, processing, maintenance, control, $1ML
Others, $0.3ML
Total
Capital Cost, US$/m2
Desalination & Seawater pipe, 700,000m3/day
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Salt Water Clay Ground Ponds 200 Hectares Desert Arava Valley, Israel
3%
5%
9%
7%
Clay&
Seawater
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NASA Intensive Culture Mixing
&Algal Productivity
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Economic Feasibility?
Salt at US$25/ton is feasible
Algae at US$1,000/ton??
Salt Algae
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ISRAELI ELECTRIC CO
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Small Israeli company of 6 employeesMajor Achievements (2005-2008):
1. Applying the know-how of health food algal biotechnology to algal bio-fuel
2. Direct use of electric power plant coal burning flue gas3. Direct use of electric power plant turbine cooling sea water4. Continuous production of microalgae, ~7 tons/1,000m2/year
5. Production of high lipid Nannochloropsis to 50%/AFDW6. Processing collaboration of the algal mass to bio-diesel, bio-ethanol and protein
7. Supply of mass of algae to many algae companies8. Reducing CAPEX and APEX of algal biotechnology
9. Scale up to 5 hectares pond area in 200910. Open to cooperation and collaboration