Northern BiogasA Renewable Energy Company

1Copyright© 2011 Northern Biogas

Grant Grinstead

Copyright© 2011 Northern Biogas

About us…

• Northern Biogas was formed by a group of professional Wisconsin dairy producers, licensed engineers and project managers to build and provide management services for biomass renewable energy projects.

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Copyright© 2011 Northern Biogas

Simple Philosophy….

• Provide a reliable and affordable anaerobic digester that offers a means of managing waste and odor while providing an economic value to the client and community

• Share our own experiences in owning and operating digester plants

• Design must be economical, self-supporting, and expandable

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Our Team’s Experience

• Designing, building and operating anaerobic digester systems

• Civil and mechanical engineering• Electric utility grid and natural gas

distribution systems• Permitting: site and air• Large dairy operations

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Services We Provide

• Feasibility studies• Grant applications• Design/Build• Permitting assistance• System startup and training• System operations and maintenance• Digestion and CHP (combined heat and power)

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Design Considerations

• Owner/Operator’s desire and skill level

• Feed stock for digester– Manure source– Substrate addition

• Retention time• Off takes: electrical, pipeline gas, or Bio-CNG• Animal bedding products (bio-solids, sand)

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NB System

• Modified European design– Adapted for harsh temperatures of upper

Midwest– Total (complete) mix, continuous flow digester

• Mesophilic in operation (~100oF)• Heated vessel to maximize methanogenic

bacteria growth• Low energy use via timed mixing events

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NB System

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Remote Monitoring

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Current Projects

Rock Creek Dairy Power

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Copyright© 2011 Northern Biogas

Idaho – Rock Creek Project

• Three dairy sites, approx 12,000 hd.• Connecting all three dairies via pipeline

– Use manure for digestion, return post separation for manure management

• Six digestion vessels, six million gallons• Nutrient removal post digestion, chemical

– 90% Phosphorus– 30% Nitrogen

• 3 MW electrical power generation14

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Summary

17Copyright© 2011 Northern Biogas

Copyright© 2011 Northern Biogas

Why a Northern Biogas System

• Experience in owning and operating• Single-source provider of the entire system• Design encompasses a membrane roof

– Increase in gas storage for peak operations– Easy to remove and clean vessel if necessary– Safety vent feature unlike fixed roof systems

• Proven H2S reduction without causing damage to the system

• Remote monitoring and operation• Easily expandable

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Thank You

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Contact us at:920-948-3216

www.northernbiogas.cominfo@northernbiogas.com

Copyright© 2011 Northern Biogas

Substrates

25363539

639093

103129

155171

195202

220400

469486

552600

657

0 100 200 300 400 500 600 700

Cattle ManureSwine Manure

Potato mashWhey

Potato peelingsSilage from sugar beet leafs

Fodder beetsGrass

Brewer's grain silageGreen corn, dough stageCorn silage, dough stage

Grass silage, first cutCorn silage, waxy stage

Food wasteSkimmed grease

MolassesWaste bread

Canola cake, 15% fatWaste grease

Baking wastes

m3/tonne

Potential Biogas Yields

Adapted from Effenberger, 2006

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Copyright© 2011 Northern Biogas

Biosolids Separation

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