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Bioenergy West Midlands Anaerobic Digestion Event and Site Visit 17th March 2009
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17th March 2009
Setting Up an
Anaerobic Digestion
Project
Lucy Lewis
Innovation Manager
Presentation Agenda
•BiogenGreenfinch
•Basics of anaerobic digestion
•Applications of anaerobic digestion technology
•Where to start & what needs to be addressed;
objectives
feedstock
biogas utilisation
digestate utilisation
planning
permitting
plant design & technology provider
BiogenGreenfinch
• Bringing together the expertise of BIOGEN – UK’s leading AD operator
with Greenfinch – UK’s leading AD technology provider
• British, family business with 30+ years of experience within the AD
industry
• Team of 47 people based at either Milton Ernest and Ludlow
• Capability and capacity to deliver a fully integrated AD solution to the
agricultural, food, waste and water industries and to local authorities
• Responsible for the development of 14 plants to date throughout the
UK
Anaerobic digestion: a natural biological process
BiomassBiofertiliser
37oC
Biogas
Biomass
for AD
Livestock Manure
Food Waste
Energy Crops
Sewage Sludge Glycerol
Biogas Upgrade
Biomethane
CO2, H2S, H2O
Biogas
60% CH4
40% CO2
Boiler
15%
Heat
Losses
85%
Biogas CHP
38%
47%
Electricity
Heat
Losses 15%
Biomass
(N, P, K, C)
Biofertiliser
(N, P, K,C)
Biogas
CH4
CO2
AD
Application of AD
Manure Sewage
Sludge
Biodegradable
Waste
Energy Crops
Reduce
Odour
Improve
Nutrient
Management
Diversion
from
Landfill
Renewable
Energy
Production
Biogas Plant in Kerala
Ryegrass Biogas in Shropshire
Sewage Sludge Digester
Co-Operative Biogas Plant in Denmark
Two types of AD plants developing
On-farm Plant
manure
farm waste
energy crops
Commercial Plant
municipal food waste
industrial food waste
What needs to be addressed?
•Project Objectives
•Feedstock
•Biogas Utilisation
•Digestate Utilisation
•Planning
•Permitting
•Plant design & technology provider
•Finance
•Plant operation
What are your project objectives?
•Make money
•Diversification
•Enhance existing slurry management
•Import nutrients
•Energy production
•Self sufficiency
•Green credentials
On-farm biogas plants
Southwest Scotland
Feedstock
•Type & quantity of feedstock?
On farm wastes & products
slurry- how long are animal housed?
what are the animals bedded on?
energy crops- do you have sufficient ground to grow in addition to animal feed?
what is the cost of crop production?
Imported feedstocks
ABP?
availability & seasonality?
feedstock guarantee & contract?
cost or gate fee?
Biogas Utilisation
•CHP
Electricity- used on site or exported to the grid?
Price per MWh?
Heat- is their a use on site or could it be exported?
Price per MWh?
Tri-generation- production of cooling using surplus heat
Connection to the national grid- contact DNO.
•Upgrade to biomethane
connection to gas grid - contract for biomethane, price per MWh
use as a vehicle fuel
Digestate Utilisation
•Where will the digestate be utilised?
Is there enough land locally?
How much will the haulage cost?
When will the digestate be applied?
What storage is required?
Is a permit required for its application to land?
What cost is offset through less requirement for imported fertilisers?
Feedstock
Energy Digestate
Process
Process Design
Plant Design & Technology Providers
•Plant design
Tank design
shape, material
Mixing system
mechanical, gas, liquid recirculation
Heating
external / internal
Digester feeding & discharge
pump, auger, gravity
Gas collection
•Budget costs
•Tendering process
Planning
•Will you get planning permission?
AONB, Greenbelt?
•Where should you apply to for planning permission?
County Planning Authority
Local Planning Authority
•What should be considered?
Odour,
noise,
vehicle movements,
proximity to dwellings,
aesthetic appearance, etc
Permitting
•Animal Health Agency
•Environment Agency
•Planning Authority
•Ofgem
Finance
•Self finance
•Bank loans
•Joint venture
Plant operation & maintenance
•Operate with current labour units
•Employ additional labour units
•Contract our specialist maintenance
•Contract out plant operation & maintenance
Conclusion
•Is the project viable & does it meet your objectives?
•Plan carefully
•Do not under estimate the project planning time
Thank you
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