Workshop 1
Compost Use In Green Infrastructure
Design, Installation, Maintenance, Performance and Economics |
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Workshop 2
Business Of Anaerobic Digestion
Financing, Siting, Biogas Markets, Project Evaluation |
Instructors:
– Henry Stevens, City of Portland Bureau of Environmental Services
– Shanti Colwell and David McDonald, Seattle Public Utilities
12:00 PM - 6:00 PM
Agenda
| 12:00 PM - 12:15 PM |
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Workshop Overview, Introductions |
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| 12:15 PM - 1:15 PM |
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Specifications for Compost-Amended Soils and Bioretention |
| • Why use compost? |
| • Critical elements of compost for these applications — particle size, quality and need for consistent product |
| • Soil Mixes |
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Compost-amended (native soil considerations, compost application rates) |
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Bioretention: Mineral aggregate, compost/aggregate ratios, variations in specifications |
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Where to use compost-amended, where to use bioretention (pros/cons) |
| • Native soil considerations |
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Nutrients |
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Geotechnical feasibility |
| • Pollutant removal |
| • Nutrients in compost |
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| 1:15 PM - 2:15 PM |
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Installation and Maintenance |
| • Compost-amended soils |
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Critical elements for installation |
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Lessons learned |
| • Bioretention soils |
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Critical elements for installation |
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Lessons learned |
| • Vegetation establishment and system stabilization |
| • Maintenance requirements (aesthetic and functional), frequency, staffing |
| • Evolving plant palette to reduce O&M demand |
| • Maintenance costs and budget allocation |
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| 2:15 PM - 3:00 PM |
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Monitoring, Performance and Cost-Benefit Analysis |
| • Predictability and reproducibility to guarantee performance of installations |
| • Modeling storm water flow on compost-amended soils |
| • Lifecycle costs, monetizing benefits of "green" vs. "grey" (conventional) |
| • Becoming standard practice in storm water management |
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| 3:00 PM - 3:15 PM |
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Q&A, Overview of Installations on Tour |
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| 3:15 PM - 3:30 PM |
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Break and Board Bus |
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| 3:45 PM - 5:45 PM |
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Tour of Installations |
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| 6:00 PM |
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Return to Red Lion |
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The American Biogas Council presents this workshop on the business of anaerobic digestion.
Instructors:
– Dean Foor, Project Engineer, Essential Consulting Oregon
– Rolfe Philip, VP Business Development, Yield Energy
– Mike Casper, Director of Project Development, Homeland Biogas Energy
– Adam Halsband, Business Development Manager, Eisenmann Corporation
– Additional Instructors Invited
9:30 AM - 4:30 PM
Agenda
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Organic Waste Management: Food and Agricultural Feedstocks |
| • Sourcing and receiving feedstocks |
| • Treating and preprocessing |
| • Options for contaminant removal |
| • Benefits and challenges |
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Determining a Location |
| • Brownfield/old landfill site |
| • Composting site |
| • Greenfield |
| • Co-locate at a dairy |
| • Food processing plant |
| • Proximity to off-takers/power grid |
| • Wastewater treatment facility |
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Types of Digester Technology |
| • Wet system configurations |
| • Dry fermentation |
| • Plug-flow and complete mix |
| • Evaluating and selecting vendors |
| • Ancillary facilities |
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Running a Financial Model, Project Financing |
| • ROI requirements |
| • Determining tip fee, digestate value |
| • Acquiring Financing (debt vs equity) |
| • AD friendly lenders |
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How Do You Want To Execute The Project? |
| • EPC (Engineering, Procurement, Construction) firm |
| • Engineering company and bid out packages |
| • Does your lender require an EPC wrap contract? Or are you self-financed? |
| • Who will ultimately be operating the facility? In-house staff? Third party? Need for a system safety and operability review before design is complete |
| • How to minimize operating costs |
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Regulations And Permitting |
| • Air, water and solid waste permits |
| • Land use and zoning considerations |
| • State codigestion rules |
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Negotiating Off-Take Agreements |
| A. Managing Digestate |
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• Animal bedding |
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• Compost |
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• Liquid fraction - land application |
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• Drying |
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• Innovation - Biochar, membrane separation, ammonia stripping and fertilizer recovery |
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| B. Determining Best Use Of Biogas |
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• Turbines, engines and CHP |
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• Renewable natural gas grid injection |
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• Vehicle fuel opportunities |
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• Utilization of fuel cells |
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| C. Negotiating a Power Purchase Agreement |
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• Price of power |
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• Escalation clauses |
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