 |  | Better Farming Series 32 - Biogas 2: Building a Better Biogas Unit (FAO, 1986, 47 p.) |
 |  | (introduction...) |
| | Preface |
| | Introduction |
|  | How to build a better small biogas unit |
| | You will need |
| | Cleaning the oil drum |
| | Where to put your biogas unit |
| | Preparing the oil drum |
| | Testing for leaks |
| | Preparing the gas holder |
| | Attaching the gas holder |
| | Putting in the waste |
| | The waste materials |
| | The starter |
| | Putting waste in this biogas unit |
| | After the waste is in |
| | Time |
| | Temperature |
| | (introduction...) |
| | Cold weather protection |
| | Scum |
| | When the gas is made |
| | Taking care of your biogas unit |
| | Making more biogas |
| | What more can you do? |
| | (introduction...) |
| | Another kind of biogas unit |
