Cover Image
close this bookBetter Farming Series 32 - Biogas 2: Building a Better Biogas Unit (FAO, 1986, 47 p.)
View the document(introduction...)
View the documentPreface
View the documentIntroduction
close this folderHow to build a better small biogas unit
View the documentYou will need
View the documentCleaning the oil drum
View the documentWhere to put your biogas unit
View the documentPreparing the oil drum
View the documentTesting for leaks
View the documentPreparing the gas holder
View the documentAttaching the gas holder
close this folderPutting in the waste
View the documentThe waste materials
View the documentThe starter
View the documentPutting waste in this biogas unit
View the documentAfter the waste is in
View the documentTime
close this folderTemperature
View the document(introduction...)
View the documentCold weather protection
View the documentScum
View the documentWhen the gas is made
View the documentTaking care of your biogas unit
View the documentMaking more biogas
close this folderWhat more can you do?
View the document(introduction...)
View the documentAnother kind of biogas unit

Cold weather protection

108. If the temperature where you live often falls below 15°C, you can keep the waste mixture warm by covering this biogas unit with plant materials such as leaves, grass, straw or maize stalks.

Protect the drum oil

109. However, as you were told in Item 28 in this booklet, you must not put this unit underground as you could with your old unit or you will not be able to shake it to break up the scum