Better Farming Series 31. Biogas: What it is; How it is Made; How to Use it (FAO Better Farming Series, 1984): Cold weather protection

Better Farming Series 31. Biogas: What it is; How it is Made; How to Use it (FAO Better Farming Series, 1984)

(introduction...)

Preface

Introduction

(introduction...)

Biogas

How is biogas made?

How big should your biogas unit be?

How to build a small biogas unit

(introduction...)

You will need

Where to put your biogas unit

Building the unit

Testing for leaks

Waste materials

What waste materials to use

How to use them

Making a starter

Putting waste into your biogas unit

Time

Cold weather protection

Stirring the waste mixture

When the gas is made

Using your biogas

Using the fertilizer

Taking care of your biogas unit

Making more biogas

Cold weather protection

87. If the temperature where you are often falls below 15°C, you will have to keep the waste mixture in your biogas unit warm.

88. If you put your biogas unit under the ground or partly under the ground, this will help to keep the waste warm.

Keep the waste warm

89. You can keep the waste mixture in your biogas unit warm by putting leaves, grass, straw or maize stalks around the large drum.

Keep the mixture warm

90. You can also keep it warm by adding a bucket or two of poultry drop, pigs mixed with other waste to the waste already in the large drum. Use one part of poultry droppings to three parts of other waste.

Use poultry droppings