Cover Image
close this bookBetter Farming Series 31. Biogas: What it is; How it is Made; How to Use it (FAO Better Farming Series, 1984)
View the document(introduction...)
View the documentPreface
Open this folder and view contentsIntroduction
Open this folder and view contentsHow to build a small biogas unit
Open this folder and view contentsWaste materials
View the documentTime
View the documentCold weather protection
View the documentStirring the waste mixture
View the documentWhen the gas is made
View the documentUsing your biogas
View the documentUsing the fertilizer
View the documentTaking care of your biogas unit
View the documentMaking 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