George M. MacDonald Director Division of Sustainability MAINE - - PowerPoint PPT Presentation

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George M. MacDonald Director Division of Sustainability MAINE - - PowerPoint PPT Presentation

May 23, 2023 256 likes •388 views

Food Scrap Composting Success George M. MacDonald Director Division of Sustainability MAINE DEPARTMENT OF ENVIRONMENTAL PROTECTION MAINE DEPARTMENT OF ENVIRONMENTAL PROTECTION MAINE DEPARTMENT OF ENVIRONMENTAL PROTECTION

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MAINE DEPARTMENT OF ENVIRONMENTAL PROTECTION www.maine.gov/dep

MAINE DEPARTMENT OF ENVIRONMENTAL PROTECTION

Protecting Maine’s Air, Land and Water

MAINE DEPARTMENT OF ENVIRONMENTAL PROTECTION

Protecting Maine’s Air, Land and Water

Food Scrap Composting Success

George M. MacDonald Director Division of Sustainability

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MAINE DEPARTMENT OF ENVIRONMENTAL PROTECTION www.maine.gov/dep

Food Recovery

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MAINE DEPARTMENT OF ENVIRONMENTAL PROTECTION www.maine.gov/dep

What is Composting?

“A biological process that transforms raw organic materials into a nutrient rich, biologically-stable soil additive suitable for plant and crop use”.

Compost

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MAINE DEPARTMENT OF ENVIRONMENTAL PROTECTION www.maine.gov/dep

Optimal Ranges for Composting

  • C:N Ratio - 20:1 to 30:1
  • % Moisture – 50% to 65%
  • Oxygen concentration – 5% to 10%
  • pH - 5.5 to 8.2 (acceptable)
  • Particle size — ¼ inch to 3 inches (largest dimension)
  • Temperature — Thermophilic (110o to 160o F)
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MAINE DEPARTMENT OF ENVIRONMENTAL PROTECTION www.maine.gov/dep

3 Bin System

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MAINE DEPARTMENT OF ENVIRONMENTAL PROTECTION www.maine.gov/dep

3 Bin Facility

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MAINE DEPARTMENT OF ENVIRONMENTAL PROTECTION www.maine.gov/dep

Making the “Bed”

Start with a 18”-24” thick bed of fresh bedded horse manure.

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MAINE DEPARTMENT OF ENVIRONMENTAL PROTECTION www.maine.gov/dep

THE EARTH TUB – ON -SITE COMMERCIAL COMPOSTING

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MAINE DEPARTMENT OF ENVIRONMENTAL PROTECTION www.maine.gov/dep

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MAINE DEPARTMENT OF ENVIRONMENTAL PROTECTION www.maine.gov/dep

“Green Mountain - Earth Flow”- UMO

1 ton of Food/day!!

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MAINE DEPARTMENT OF ENVIRONMENTAL PROTECTION www.maine.gov/dep

Compost System

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MAINE DEPARTMENT OF ENVIRONMENTAL PROTECTION www.maine.gov/dep

www.maine.gov/dep