Biogas Utilization - BioEnergyFarm · 2020. 10. 1. · Biogas 5. Biomethane 1. Fuel 2. Grid 6....
Transcript of Biogas Utilization - BioEnergyFarm · 2020. 10. 1. · Biogas 5. Biomethane 1. Fuel 2. Grid 6....
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Biogas Utilization
..more than CHP
Berry de Jong (CCS)
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Small scale gas utilization
techniques
Small scale gas utilization 2
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Content
1. Energy on the farm
2. Combined Heat & Power
3. Heat
4. Biogas
5. Biomethane
1. Fuel
2. Grid
6. Other
Small scale gas utilization 3
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Energy use on the farmEnergy use
per animal
Electricity
(kWh)
Electricity
(MJ)
Natural Gas
(m³)
Natural Gas
(MJ)
Milking cows 456 1634 16,7 525
Sows 182 654 43,5 1375
Pigs for meat 37 136 3 94
Laying hens 3,1 11 0 0
Small scale gas utilization 4
Source: based on Energiebesparing en – benchmark in de agrarische sector’ AgentschapNL 2011
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Energy use on the farm (2)
Small scale gas utilization 5
Farm sizeElectricity
(kWh)
Electricity
(MJ)
Natural
Gas (m³)
Natural
Gas (MJ)
Milking
cows
100
30045,600
136,800
163,400
490,200
1,670
5,010
52,500
157,500
Sows500
1,000
91,000
182,000
327,000
654,000
21,750
43,500
687,500
1,375,000
Pigs for
meat
1,000
5,00037,000
185,000
136,000
680,000
3,000
15,000
94,000
470,000
Laying
hens
15,000
30,000
46,500
93,000
165,000
330,000
15,000
30,000
Source: based on Energiebesparing en – benchmark in de agrarische sector’ AgentschapNL 2011
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Energy use vs energy potential
on the farm
Small scale gas utilization 6
Farm size
(# animals)
Electricity
used (kWh)
Electricity
produced
(kWh)
Natural
Gas used
(m³)
Natural Gas
produced
(m³)
Milking
cows
100
30045,600
136,800
107,500
375,000
1,670
5,010
34,000
102,000
Sows500
1,000
91,000
182,000
63,000
145,000
21,750
43,500
22,500
45,000
Pigs for
meat
1,000
5,00037,000
185,000
60,000
400,000
3,000
15,000
21,750
108,750
Laying
hens
15,000
30,000
46,500
93,000
75,850
180,000
500
1,000
26,300
52,500
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50.000
100.000
150.000
200.000
250.000
300.000
350.000
400.000
450.000
100 300 500 1.000 1.000 5.000 15.000 30.000
Milking cows Sows Pigs for meat Laying hens
kW
h
Electricity use on the farm
Electricity potential of the biogas plant mono-manure
Energy use vs energy potential
on the farm (2)Electricity
Small scale gas utilization 7
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20.000
40.000
60.000
80.000
100.000
120.000
-
2.000.000
4.000.000
6.000.000
8.000.000
10.000.000
12.000.000
14.000.000
100 300 500 1.000 1.000 5.000 15.000 30.000
Milking cows Sows Pigs for meat Laying hens
m³
na
tura
l g
as e
q.
kW
h
Heat (Natural Gas) use of the farm
Heat potential of the biogas plant on the farm mono-manure
Energy use vs energy potential
on the farm (3)Heat
Small scale gas utilization 8
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• Only for sows the potential production of energy
equals the use of energy on farm
• Electricity is 2 to 3 times higher production
• Heat (Gas eq.) is 10 to 50 times higher
production
Energy has to be sold
Small scale gas utilization 9
Energy use vs energy potential
on the farm (4)
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Experiences co-digesters
Situation in the Netherlands, but also relevant for other countries
• Digesters were primarily designed for electricity production
• Changing markets– Decrease of electricity price
– Increase price of co-substrates
• Bankruptcy of digesters
… With no heat valorization
Small scale gas utilization 10
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Options for gas utilization
There are multiple options for gas use:
1. Combined Heat & Power (CHP)
2. Heat
3. Biogas
4. Biomethane
5. Other
Small scale gas utilization 11
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Option 1: CHP
• Most used for large scale digestion
• Production of electricity and process heat
– Heat for own use
– Electricity partly for own use, partly sold
• For small scale heat valorization is difficult
• Electricity feed-in is subsidized money
Small scale gas utilization 12
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Option 1: CHP
Small scale gas utilization 13
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Option 1: CHP
Pros:
• Simple technique
• Proven technology
• Easy offset of energy
• Heat for free on farm
Cons:
• Only electricity
• If electricity price
drops, BC drops
• Difficult heat
valorization
• Low energy efficiency
Small scale gas utilization 14
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Option 1: CHP
• Especially small scale low electric efficiency
• Part of heat used for process
Small scale gas utilization 15
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Option 1: CHP
• Efficiency drops fast for small scale CHP
Small scale gas utilization 16
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Option 2: Heat
Heat production by boilers or CHP (Related to option 3: Biogas)
Heat delivery to:• On farm processes
• District heating
• Industry
• Swimming pool
• Etc.
In most countries heat delivery not subsidized topic for lobby work
Small scale gas utilization 17
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Option 2: Heat
Pros:
• Simple technique
• Proven technology
• High energy efficiency
• Low costs (investment & maintenance
Cons:
• Heat demand not (always) stable over year
• Depended of end user(s)
• In most countries not subsidized
• Heat pipes only usable at short distances
Small scale gas utilization 18
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Option 2: Heat
• Low energy losses
• Only possible at short distances
Small scale gas utilization 19
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Option 3: BiogasDirect sales of (un-treated) biogas
• Transport via:
1. Biogas grid or
2. Biogas tank transport
Delivery to:
• Industry
• Swimming pools
• District heating
Possibility with satellite CHP
Small scale gas utilization 20
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Option 3: Biogas
In most countries biogas sales not
subsidized
1. Option with satellite CHP
2. Selling of the heat
3. Lobby for subsidy scheme for raw biogas
Small scale gas utilization 21
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Option 3: Biogas
Pros:
• No upgrading needed
• No CHP needed
• Proven technology
• High energy efficiency
• Low maintenance costs
• Possible at longer
distances
Cons:
• Biogas often not
subsidized
• Depended of end user(s)
• New infrastructure needed
Small scale gas utilization 22
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Option 3: Biogas
Small scale gas utilization 23
• Dutch example biogas grid
• 20 dairy farms
• 3 end users
• 14 km gas grid
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Option 3: Biogas
• High energy efficiency when used in industrial burners
• Minimal energy losses
Small scale gas utilization 24
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Option 4: Bio Methane
Sales of bio methane as:
1. Natural gas substitute
– Grid injection
2. Transport fuel
– Feed-in in natural gas grid
– Selling via tank station
– Off set with tank transport
Small scale gas utilization 25
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Option 4: Bio Methane
Upgrading options
1. Farm scale
2. Centralized
(farms connected via
biogas pipes and one
central upgrading system)
Small scale gas utilization 26
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Option 4: Bio Methane
Pros:
• High energy efficiency
• Higher revenues
• 24/7 feed-in
• Savings on transport fuel
Cons:
• Complex technique
• High operational costs
• Not in every country subsidized
• For fuel high pressure is needed
Small scale gas utilization 27
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Option 1- 4: energy efficiency
Small scale gas utilization 28
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Option 5: Other options
Combinations of techniques:
• CHP & Biomethane
• Biomethane and dual-fuel tractor
• CHP & digestate treatment
– Pasteurization of thick fraction
– Chemical-like fertilizer production
Small scale gas utilization 29
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General remarks• All presented options are feasible at farm-scale
(in the Netherlands) – CHP >100 dairy cows
– Heat >100 diary cows, but depending on heat use close by
– Biogas >90 dairy cows, but depending on heat use close by
– Bio Methane > 250 dairy cows
(numbers based on our own experiences and feasibility studies)
• Geographical details important in choice of technique
• Lobby work needed in countries with no biomethane or sustainable heat subsidies
Small scale gas utilization 30
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Decision makingSome steps in doing a FS:
1. What is the own energy use, electrical & heat
2. Is there heat use close by <1 km
3. Is there large heat use close by <5 km – industry with steam production,
– swimming pool,
– piggery
– etc.
4. Are there other large energy users close by <5 km – elderly houses,
– hospitals,
– district heating
5. Is Biomethane feed-in possible at site
6. Are there other processes thinkable that may use the produced energy
Small scale gas utilization 31
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Decision makingSome steps in doing a FS1. What is the own energy use, electrical & heat
Yes? CHP or boiler
2. Is there heat use close by <1 kmYes? CHP or boiler & heat network
3. Is there large heat use close by <5 km (industry with steam production, swimming pool, etc.)Yes? Biogas grid (& satellite CHP)
4. Are there other large energy users close by <5 km (elderly houses, hospitals, district heating)Yes? Biogas grid & satellite CHP or boiler
5. Is bio methane feed-in possible at siteYes? Biogas upgrading & grid feed-in
6. Are there other processes thinkable that may use the produced energy Yes? Expertise of the experts is tested to the max!
Small scale gas utilization 32
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Conclusion
1. There is more (and better) than CHP
2. Details will make or break the case
3. Sometimes subsidy schemes have to be adapted
4. Farm scale digestion has a huge potential, and it is our
job to help farmers (and other stakeholders)
recognizing that!
Small scale gas utilization 33
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The use of the offline expert feasibility
calculator for small scale digestion34
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Other outputs of the
BioEnergy Farm 2 project• Leaflets with case studies
• Market overview– Microscale digestion in Europe
• Policy guideline– What policymakers should know about small scale biogas installations
• Implementation Guideline– From idea to implementation
• Tools– Business plan and Calculation tool
– Manuals
• Training sessions– Slides from presentations
The use of the offline expert feasibility
calculator for small scale digestion35
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Information for:
Farmers
• Online tool (simple)
• What is micro scale digestion
• Market overview
• Digestate treatment
• From Idea from Implementation
• Case studies
• Agenda with events
• Etc.
The use of the offline expert feasibility
calculator for small scale digestion36
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Information for:
• Policy makers
• Benefits of MSD
• Emissions
• Sustainable energy
• Social aspects
• Etc.
The use of the offline expert feasibility
calculator for small scale digestion37
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Information for:
• Experts
• Training material
• Tools
• Manuals
The use of the offline expert feasibility
calculator for small scale digestion38
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The use of the offline expert feasibility
calculator for small scale digestion39
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The use of the offline expert feasibility
calculator for small scale digestion40
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The use of the offline expert feasibility
calculator for small scale digestion41
Available in 6 languages and for 7 countries• English (7 countries)
• Germany (German)
• Netherlands (Dutch)
• France (French)
• Belgium (Dutch & French)
• Poland (Polish)
• Italy (Italian)
• Denmark (Danish)
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Thank you for your attention
Small scale gas utilization 42