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bpEnvironmental case studies give detailed financial feasibility breakdown of two different constructions of digester systems. The system can be constructed using Stainless or Carbon Steel, depending on the durability required.
Case Study #1
350 FARROW TO FINISH OPERATION ( STAINLESS STEEL )
TOTAL Yearly manure output: 1,845,200 gallons
(Alberta Agriculture, Code of Practice, page 21, apdx. B1)
(5272 gallons x 350 = 1,845,200 gallons)
Present Cost of Disposal / Spreading: about .0065 cents per gallon (Alta Ag.)
Cost of STAINLESS STEEL DIGESTER SYSTEM: $165,878.00 cdn.
Cost of Electrical Power to process 2,160,000 gallons: $9,000.00 (TransAlta)
(includes 314,800 gallons of wash-down and / or flush water)
FIRST 5 years COST TO PROCESS TOTAL MANURE OUTPUT
First 5 years of operation @ 2,160,000 gallons per year: 10,800,000 gallons
(2,160,000 gallons x 5 years = 10,800,000 gallons output)
Power consumption for 5 years of operation: $ 45,000.00
($9,000.00 x 5 years = $45,000.00)
Combined operating costs: $ 210,878.00
($165,878.00 + $45,000.00 = $210,878.00)
COST PER GALLON FOR COMPLETE TREATMENT: $ 0.019 cents
($210,878.00 divided by 10,800,000 gallons = $0.019 cents)
or : UNDER .02 cents per GALLON
SECOND 5 years COST TO PROCESS TOTAL MANURE OUTPUT
End of second 5 years of operation @ 10,800,000 gallons
Power consumption for 5 years of operation: $45,000.00
Power equipment repairs / replacements: $ 15,000.00
(electric motors, pump impeller, blower parts etc.)
Combined operating costs at end of second 5 years of operation: $60,000.00
COST PER GALLON FOR COMPLETE TREATMENT: $0.0055 cents
( $60,000.00 divided by 10,800,000 gallons = $0.0055 cents )
or : ABOUT 0.0055, or 1/2 of 1/2, OF A CENT per GALLON
Case Study #2
350 FARROW TO FINISH OPERATION : ( CARBON STEEL )
TOTAL Yearly manure output: 1,845,200 gallons
(Alberta Agriculture, Code of Practice, page 21, apdx. B1)
(5272
gallons x 350 = 1,845,200 gallons)
Present Cost of Disposal / Spreading: about .0065 cents per gallon (Alta Ag.)
Cost of CARBON STEEL DIGESTER SYSTEM: $115,522.00 cdn.
Cost of Electrical Power to process 2,160,000 gallons: $9,000.00 (TransAlta)
(includes 314,800 gallons of wash-down and / or flush water)
FIRST 5 years COST TO PROCESS TOTAL MANURE OUTPUT
First 5 years of operation @ 2,160,000 gallons per year: 10,800,000 gallons
(2,160,000 gallons x 5 years = 10,800,000 gallons output)
Power consumption for 5 years of operation: $45,000.00
($9,000.00 x 5 years = $45,000.00)
Combined operating costs: $ 160,522.00
($115,522.00 + $45,000.00 = $160,522.00)
COST PER GALLON FOR COMPLETE TREATMENT: $0.014 cents
($160,522.00 divided by 10,800,000 gallons = $0.014 cents)
or : ABOUT .014 cents per GALLON
SECOND 5 years COST TO PROCESS TOTAL MANURE OUTPUT
End of second 5 years of operation @ 10,800,000 gallons
Power consumption for 5 years of operation: $45,000.00
Power equipment repairs / replacements: $ 15,000.00
(electric motors, pump impeller, blower parts etc.)
Combined operating costs at end of second 5 years of operation: $60,000.00
COST PER GALLON FOR COMPLETE TREATMENT: $ 0.0055 cents
($60,000.00 divided by 10,800,000 gallons = $ 0.0055 cents)
or : ABOUT 0.0055, or 1/2 of 1/2, OF A CENT per GALLON
CALCULATIONS SHEET
ELECTRICAL POWER COMSUMPTION for DIGESTER SYSTEM:
Power Equipment: 2 ea. Blower Motors; 5 HP, 220V, 60 Hz, 3 Phase
1 ea. Pump Motor; 5 HP, 220V, 60 Hz, 3 Phase
1 ea. Ozone System; 110V, 60 Hz, 10 amps
Operation Mode: Based on constant run for ease of calculation
Power Quote: TRANSALTA POWER, Feb. 1, 1999 ( verbal over telephone )
Total Power consumption per 24 hour period: $23.01 Well use $24.00
or : $24.00 x 31 days = $744.00 per month
or : $744.00 x 12 months = $8,928.00 Well use $9,000.00 per year
Processing Period: for DIGESTER SYSTEM sized for 350 Hog F to F Operation:
1 ea. 12,000 gallon batch every 2 days (48 hrs.) or 15 batches per month
or 12,000 gallons x 15 batches = 180,000 gallons per month
or 180,000 gallons x 12 months = 2,160,000 gallons per year (extra volume over 1,845,200 gallons is for wash-down water and / or flush water)
COST OF BORROWING
AGRI FINANCE: based on $165,878.00 loan over 5 years
Down payment: $43,878.00
Semi-annual payments: 10 ea. @ $16,516.08
Total cost: $209,038.80
Cost of borrowing: $39,160.80
(based on unpaid balance of $126,000.00)
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