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Presentation given to Environment Agency conference, Peterborough, 5.03.09
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CHP Engines, Anaerobic Digestion & Mechanical Biological Treatment
Environment Agency ConferenceWaste Technologies in Practice
Peterborough
5th March 2009Alex Marshall
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Topics
Company introduction Market drivers UK market potential Technology differentiation Gas engine options CHP & pasteurisation New technologies
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Clarke Energy Introduction
Established 1989 Distributor, sales, installation & service
GE Jenbacher HUG
Multinational Sold over 1 GW generation capacity Employ 500 people worldwide ISO quality accreditation
ISO9001 Quality Management ISO14001 Environmental Certified
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Headline Figures
Equipment Sales37%
Telecom30%
Service / Parts33%
India4%Nigeria
7%
Australia23.4%
France15.5%
UK49.5%
Ireland0.5% China
0.1%
Worldwide Group Sales UK Sales
The Clarke Group is owned 82% by the Management team and 18% by 3i plc
Turnover of £150m worldwide in 2008 550 employees worldwide Significant growth in China, India and UK
expected in 2009
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Energy Crops for Biogas – Market Size Estimate
Germany – 4.2% of arable land
UK arable land 6.4m hectares
~270,000 ha for biogas*
~665 MW capacity
~1,000 plants
*Based upon equivalent land use as Germany
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Food Waste - Market size
6.7m tonnes food waste* 5.2m municipally collected* 1.3m ‘unavoidable’* 1.2m tonnes food waste is still
packaged*
~100-130 food waste plants Based upon - 30ktpa plant
capacity 75% waste availability Excluding manures and other bio-
solids
Other additional inputs 90m t of livestock manure per
annum** 10m t ‘other’ bio-solids**
Sources: *WRAP 2008 ** Defra 2007
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Technology DifferentiationTech. Feedstock Contaminants Pre-processing Plant type Biogas
Whole crop maize silage, rye silage, grass silage.
Few with maize, other feedstocks may increase complexity
Simple. Silage clamp, hopper, feed conveyor.
Co-fermentation plant
Silages, manures, glycerol, slaughterhouse wastes & slurries?
Few contaminants, slaughterhouse wastes pose problems with effluent
Simple. Clamps, hoppers, liquid input points, shredders, may include pasteurisation.
Food waste
Supermarket food waste, food processor waste, may include green waste, source segregated household food wastes
Packaging. Sand can be a particular problem. Green waste - branches and twigs not ideal for wet AD.
Simple or robust. Simple – Hopper, screw feeders, shredders, wash water, pasteurisation Robust – Shredder, pulper, star-screen, magnets, sand traps pasteurisation
MBT-AD
Highly variable mixed wastes
Many unexpected contaminants, must handle a wide range of inputs.
Robust, Shredders, trommels, magnets, eddy current separators, ballistic separators, pulpers, sand traps
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Technology Differentiation
Technology Input type Tonnage (tpa) Contaminants Elec. Output (kW)
Digestate use
Biogas Energy crops 10-15,000 No 150 -1,500 Farmland – no restrictions
Co-fermentation
Slurries & agricultural feed
15,000 – 90,000 Minimal amount
500 - 1,500 Farmland – ABPR
Food waste Food wastes 15,000 – 75,000 Packaging 500- 2,500 Farmland - ABPR MBT-AD Mixed
municipal waste
50-300,000 Large amount 700- 3,000 Land remediation, non farm land applications
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Typical Biogas Plant
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Typical Co-fermentation Plant
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Food Waste Plants
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MBT-AD Plants
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MBT-AD – Typical Flow Chart
Mixing/hydrolysis
Pasteurisation?
Digester
Dewatering
Landfill / land remediation
Enclosed reception
RDF
Sand, grit, stones
Wastewater treatment
MetalsMechanical pre-treatment
Wet pre-treatment
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GE Jenbacher Gas Engine Options
Engine range 330 – 4,000kW Designed from outset to operate on
Natural gas Landfill gas Biogas Mines gas Special gases
Unrivalled efficiency (>43%) and durability (>90% availability)
Backed up by Clarke Energy’s maintenance and support package
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GE Jenbacher Engine Models
Type 2 – 250 – 330 kWe
Introduced 1976 – 30 years continuous development
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GE Jenbacher Engine Models
Type 3 – 500 – 1,100 kWe
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GE Jenbacher Engine Models
Type 4 – 800kWe – 1,500kWe
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GE Jenbacher Engine Models
Type 6 – 1,600 kWe – 4,000 kWe
Not typically used for biogas applications
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What is CHP?
‘Combined Heat and Power (CHP) – is a highly efficient and environmentally
friendly technology for generating heat and power (usually electricity)
on site from a single fuel source usually gas.’
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CHP – The Basic Concept
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How Does CHP Work?
The basic elements of a CHP plant: A prime mover (gas engine) Electrical generator driven by the engine Heat exchangers recovering heat from
the engine Jacket cooling water Lubricating oil Turbocharger intercooler Exhaust gases
System control panel
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GE Jenbacher Gas Module
Heat recovery -Heat
Exchanger
EngineEngine control
panelGenerator
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Typical CHP Flow Diagram
Gas Input
Engine Hot Water Circuit
Sec
onda
ry H
eat
E
xcha
nge
r
Electrical Output
Exhaust Heat Exchanger
Building Hot Water Return
Building Hot Water Feed
Exhaust
Engine Hot Water Circuit
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Energy Balance of Cogeneration Module
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MBT-AD & CHP Engine Integration
Exhaust heat
Jacket water, oil heat & intercooler
~400ºC
90ºC
Drier
2-300ºCAir
Heat exch.
Pasteuriser
External heat sink
Digester
District heating Industry
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ABPR & Gas Engine Technology
No pasteurisation – Non ABRP material only
Category 3 - Dedicated pasteurisation unit 70°C 1 hr Thermophilic temperature operation
Category 2 Stricter limits, rendering
Additional non-engine items Wheel wash Vehicle wash down area Separate ‘clean’ and ‘dirty’ areas Operational strategy & management
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Pasteurisation Unit Integration
Pasteurisation tanks
Inflow
Outflow
Heating water from CHP
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New Technological Applications
Biogas up-graders Grid injection Vehicle fuel
Tri-generation Fuel cells
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Biogas Upgrading
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Clarke Energy GE Jenbacher & MBT – AD
Viridor - Manchester PFI 4 MBT-AD facilities
Biffa - West Sussex PB 3 x JMC 320 3MW
WSN Environmental New South Wales 2 x JMC420 2.8MW
Supplying technology to Haase, Enpure & Arrow Ecology
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Contact Details
Alex Marshall
Product Manager
Clarke Energy
07917 066242
0151 546 4446
