Biogas Plant Resources
Methane Digesters For Fuel Gas and Fertilizer With Complete Instructions For Two Working Models
by L. John Fry
Santa Barbara, California
Resource from
http://journeytoforever.org/biofuel_library/MethaneDigesters/MDToC.html
Download Methane Digesters for Fuel Gas and Fertilizer [PDF]
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Table of Contents
1 BackgroundMethane-Gas Plant: Synergy at Work
2 History
3 Biology of Digestion
Bio-Succession in the Digester
pH and the Well-Buffered Digester
Temperature
4 Raw Materials
Digestible Properties of Organic Matter
Amount of Manure Collectable
Manure Production and the Livestock Unit
Carbon to Nitrogen Ratio (C/N)
Calculating C/N Ratios
5 The Gas
Composition
Fuel Value
Amount of Gas From Different Wastes
6 Digesters
Basic Digester Design
Raw Materials and Digester Design
Loading Rate, Detention Time and Digester Size
Heating Digesters
Insulating Digesters
7 Using Gas
Properties of Methane
Uses of Methane
Efficiency of Digestion
8 Using Sludge
Sludge as a Fertilizer
Sludge Gardening and Farming
Sludge-Pond Cultures
9 Building a Sump Digester
Making Starter Brew
10 Building an Inner Tube Digester
Inner Tube Digester Parts List
1. Main Chamber of the Digester
2. The Plastic Insert
3. Attaching the Cylinder to the Inner Tube
4. Inlet Fittings and Attachment of the Slurry (Feeding) Bucket
5. Fitting the Effluent Pipe
6. Fitting the Gas Outlet
7. The Scum Collector
8. Gas Yield Indicator
9. Pressure Release Bottle
10. Inner Tube Storage
11. Burner
12. Temperature
13. The Bacterial Brew
14. Feeding
15. Removing Scum and Effluent
16. Safety Precautions
17. Lighting the Flame
18. pH
11 Necessity is the Mother of Invention
Design of the First Full Scale Displacement Methane Plant
Digester Description
