COMPONENTS FOR SUCCESSFUL COMPOST FACILITY OPERATIONS SCAP Biosolids Committee Meeting August 2, 2012.

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Presentation transcript:

COMPONENTS FOR SUCCESSFUL COMPOST FACILITY OPERATIONS SCAP Biosolids Committee Meeting August 2, 2012

page 2 AGENDA Facility Siting Considerations Composting Technologies Permitting Regulatory Compliance Process Control Compost Quality

page 3 FACILITY SITING CONSIDERATIONS Location, Location, Location! –Regulations –Nearby Compost Market –Sensitive Receptors Public Education/Politics –Education Begins Early –Keep it Simple –Remember the Benefits Diversion Soil Enhancement Erosion Control –Dont ignore the public/politics

page 4 COMPOSTING TECHNOLOGY Windrow Negative Aerated Static Pile with Biofiltration In-vessel

page 5 COMPOSTING TECHNOLOGY: Negative Aerated Static Pile Composting

page 6 COMPOSTING TECHNOLOGY: Negative Aerated Static Pile Composting

page 7 PERMITTING Local Conditional Use Permit CEQA CA Solid Waste Facility Permit –Report of Compost Site Information –Odor Impact Minimization Plan Regional Water Quality Control Board Local Air District Permit U.S. EPA Registration

page 8 REGULATORY Inbound Materials Monitoring –Biosolids –Carbon Feedstocks Process Water Management Ground Water Monitoring Special Occurrences Source Testing Compost Samplin g –C.C.R. Title 14, Chapter 3.1, Article 7 Metals Concentrations (max) Pathogen Reduction (PFRP) Sampling Requirements

page 9 PROCESS CONTROL PARAMETERS Control Points –Feedstock Handling –Mix Ratios –Moisture –Aeration Rates –Temperature/PFRP

page 10 THE COMPOSTING PROCESS Feedstocks Microorganisms Oxygen Water Compost CO 2 Water Odors? Heat

page 11 COMPOST FACILITY FEEDSTOCK-PROCESS-MARKET Identify and quantify Feedstocks Analyze Markets Develop and adjust recipes Collect or receive feedstocks Process: Grind, Mix, Compost, Cure, Screen, etc. Market and distribute Assess Compost Facility Start here or here

page 12 THE KEY PROCESS VARIABLES for Control of the Composting Process 1.Initial feedstock mix 2.Pile moisture 3.Pile aeration 4.Pile shape and size 5.Pile temperature 6.Composting retention time

page 13 FEEDSTOCKS: YOUR RAW MATERIAL Chemical Composition –Organic Matter, Nutrients, Degradability Physical Characteristics –Moisture, Bulk density, Heterogeneity Other –Contamination, Cost, Availability, Regulations

page 14 FEEDSTOCK SUMMARY Each feedstock has certain attributes The RECIPE is how feedstocks are combined Composting system designed for feedstocks Regulations are always partly based on feedstock

page 15 OTHER CONSIDERATIONS Health & Safety Initial Mix Ratios Moisture Aeration Temperature Time Curing/Maturity Testing

page 16 SUMMARY: Key Initial Parameters for Composting

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