Climate Change InnovationAnaerobic Digestion

AnaerobicDigestion

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Philip Pearson / Steve Price

Anaerobic Digestion Ltd

Modern growing facilities

Attention to detail

APS Production Centres APS Production Centres

• Packing and Distribution Centre

• Middlewich

• Grading and Packing Centre

• Alderley Edge

Climate Change Mitigation

•Reduce

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•Re-Use

•Re-Cycle

•Resource Management

•Temperature Integration

•Computerised Irrigation Control

•Fertiliser Management

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Reduce

•Fertiliser Management

•Thermal Screens

•Printed Packaging

•Packaging Film Thickness

Re-Use

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Analysis of Business inputs

–Returnable Packaging

–Return run off irrigation water–Return run off irrigation water

–Waste CO2 used to enrich crop

environment

–Re-Use of waste products?

Re-Cycle

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What have A. Pearson & Sons done to

reduce our impact on the environment

through recycling and Resource efficiency?

– Combined Heat & Power– Combined Heat & Power

– Ground Source Cooling

– Anaerobic Digestion

Combined Heat & Power

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CHP Plant

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Award Winning Environmental Work

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• 1999 Mersey Basin

Business in the

Environment

Awards Winner

• 2000 Salad Grower

of the Year

• 2000 Grower of the

Year

• 2008 Tesco

Environment Award

Ground Source Cooling

Co

nd

en

ser

Liquid only 40 to 50oC

Gas / liquid mixture

0 - 10oC

Cool

air inWarm air

Packhouse / Crop Store

Evaporator

Compressor

Co

nd

en

ser

Gas only 5 to 15oC

Gas only

70 - 80oC

air inWarm air

out

Bespoke Software

Logging of all

temperatures

and pressures

Water Tank

APS A.D PlantAnaerobicDigestion

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Closed Loop

• Carbon Dioxide

• Irrigation Water

• Fertiliser

• Bio Methane

•Heat

•Electricity

There’s a flame here somewhere !AnaerobicDigestion

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Initial Gas Test

What is Anaerobic Digestion?AnaerobicDigestion

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• Anaerobic digestion is a natural bacterial

process that converts biomass to energy.

• Biomass is any organic material that comes

from plants, animals or their wastes.

• The Process produces, rather than consumes,

energy.

What is Anaerobic Digestion?AnaerobicDigestion

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Process Stages

Agricultural A.DAnaerobicDigestion

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Slurry PitAnaerobicDigestion

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Manual ScrapeAnaerobicDigestion

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Auto ScrapeAnaerobicDigestion

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Disposal - SpreadingAnaerobicDigestion

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Dry MatterAnaerobicDigestion

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AD LoadingAnaerobicDigestion

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Walking FloorAnaerobicDigestion

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MixingAnaerobicDigestion

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Digestor - ExternalAnaerobicDigestion

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Digestor - InternalAnaerobicDigestion

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Gas StorageAnaerobicDigestion

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Inside MembraneAnaerobicDigestion

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ControlAnaerobicDigestion

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CHPAnaerobicDigestion

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CHP ContainerAnaerobicDigestion

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DigestateAnaerobicDigestion

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Liquid Digestate StorageAnaerobicDigestion

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IntegrationAnaerobicDigestion

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German ModelAnaerobicDigestion

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BarriersAnaerobicDigestion

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• Be aware of Local Legislation and

Public feeling.

•Perceived Odours

•Flammable gas storage issues

•Planning•Planning

•Environmental protection

•Digestate removal

•Electrical connections

•Maintenance & Control

Our ApproachAnaerobicDigestion

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Control & ManagementAnaerobicDigestion

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• Substrate flow

• Chemical Oxygen Demand (COD) value

• Temperature

• pH value

• Redox potential

• Biogas quality (%CH4)

Working PracticesAnaerobicDigestion

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Monitoring AnaerobicDigestion

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Control DevelopmentAnaerobicDigestion

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Thank you

AnaerobicDigestion

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Thank you