Environment Agency Waste Technologies in Practice Conference

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

alex.marshall@clarke-energy.com

07917 066242

0151 546 4446