Next-Generation Organics ManagementHigh Solids Anaerobic Digestion in Massachusetts

• Builder, owner, and operator of organic waste processing facilities

• Recognized industry-leading experience in organics waste management

• Financial investments from Kleiner Perkins Caulfield & Byers, Generation IM, Munich Venture Partners, and Waste Management

• 150 employees

• Expanding technology portfolio supported by industry-leading science and technology advisors

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Harvest, a Massachusetts-based company, is ushering in a new era of organic waste management by harvesting the renewable energy and soil-building potential in organic waste at its state-of-the-art organics recycling facilities.

Corporate Profile

About Harvest

• Fraser Richmond Soil & Fibre • Near Vancouver, BC, one of the largest, most efficient

composters in North America• Largest yard and food waste composting facility in Canada• Under construction of North America’s first commercial-scale

HSAD facility to increase capacity and process the region’s growing SSO stream

• Urban Wood Waste Recyclers• Metro Vancouver’s largest recycler of urban wood waste,

achieving the highest levels of land fill diversion in the region• Expanding production of coal-replacement fuels

• Tulare• Large windrow operation in Tulare County, CA• 100% of end product goes into high value agriculture

• Tullytown• Operating windrow facility at WM landfill site• Soon to be upgraded with Harvest’s proprietary composting

technology• London Ontario

• North America’s largest merchant AD facility• Using LSAD technology• Operational year end 2011

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Operating Facilities

About Harvest

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Technology Selection is Driven by Feedstock Characterization

That’s why Harvest is under development on high solids anaerobic digestion (HSAD) and low solids anaerobic digestion (LSAD) projects. The technology choice largely depends on the feedstock characteristics:

The choice is also dependent on the availability of wastewater reuse options (farms, WWTPs, etc.), as LSAD results in wastewater discharge.

Characteristic HSAD LSAD

Ideal waste stream types

Solid food wastes (including SSO, commercial/industrial and some FOG) and yard/wood wastes

Dewatered residuals, food waste, manure, FOG, liquid organic wastes

Solids content of overall mix

25-50% 5-15% (any greater would require dilution)

Contamination levels Can be higher due to fewer moving parts; contaminants are removed post-AD

Lower due to pumping of material; requires pre-processing of feedstock to remove contaminants

HARVEST’S TECHNOLOGY SPECIFICATIONS

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Technology

Characteristic HSAD LSAD

Solids Content High solids (stack) Low solids (pump)

Temperature Mesophilic 1st Phase Thermopilic Hydrolysis followed by 2nd Phase Mesophilic AD

Process Batch Continuous

No. of Stages Multi-stage Multi-stage

Schematic

SAMPLE 30,000 TONS PER YEAR HSAD FACILITY LAYOUT

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Technology

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HSAD – AdvantagesProcess yields biogas with average methane content of 70% to 80%, considerably higher than many other HSAD technologies. Less biogas cleaning and processing required.

Process design allows for a maximum feedstock residence time of wo weeks, increasing processing capacity and reducing facility footprint

No grinding, slurrying required; only moving part is front-end loader; entire process controlled by computer.Operational

Requirements

Biogas Purity

Residence Time

Technology

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HSAD – Advantages (2)AD process naturally breaks down many of the volatile compounds that cause odor; system under negative pressure with air ventilated through biofilter, eliminating VOCs; facility is totally enclosed.

Large portion of leachate is re-circulated to aid in digestion and gas yield; the remainder may be used in compost process.

Very low parasitic energy use of <5%; requirements can be met completely with energy generated on-site.

Water Usage & Leachate Control

Energy Requirements

Odor Control

Technology

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Cottbus R&D Facility

HSAD FACILITIES

Reference Facilities

Harvest’s HSAD technology partner GICON has built 30 biogas facilities in Europe, and we recently started construction on an HSAD facility at Fraser Richmond Soil & Fibre, our 300,000-tpy composting operation in Richmond, BC.

80,000 TONS PER YEAR LSAD FACILITY LAYOUT

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Technology

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LSAD – AdvantagesCan process a wide variety of typically challenging organic wastes including SSO, grease trap contents, food processing residuals and Dissolved Air Flotation residuals (DAF)

Has a long track record of operational success with thousands of facilities in operation

Continuous process allows for optimal use of infrastructure

Infrastructure Utilization

Feedstock Flexibility

Technology Dependability

Technology

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LSAD – Advantages (2)

A large number of technology suppliers exist, increasing competition and reducing facility costs

Less feedstock seasonality allows for more consistent operation

Consistent energy production due to continuous feeding process

Operational Consistency

Energy Production Consistency

Market Maturity

Technology

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Cottbus R&D Facility

LSAD FACILITIES

Reference Facilities

LSAD is a proven technology in North America and Europe. Harvest’s LSAD technology has experience in many different types of anaerobic systems, all of which are optimized for certain applications, duties or design objectives.

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Project Details

Power and Heat production 5.7 MW

Permitting Environmental permits approved by the Ontario Ministry of the Environment

Power Purchase Agreement 20-year agreement with the Ontario Power Authority under the Renewable Energy Standard Offer Program

Waste Capacity 80,000 tons

London Project Overview

Harvest is breaking ground on a 80,000-tpy LSAD facility in London, Ontario. The project details for this facility are shown below.

Harvest Power, Inc.221 Crescent Street, Suite 402Waltham MA 02453www.harvestpower.com

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CONTACTPaul Sellew, CEO781-314-9501 (o) | 860-428-3479 (c)psellew@harvestpower.com

Molly Bales, Business Development Associate781-314-9524 (o) | 252-452-0759 (c)mbales@harvestpower.com

About Harvest