 |  | 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 | ||
| | Putting in the waste | ||
| | Time | ||
| | Temperature | ||
| | Scum | ||
| | When the gas is made | ||
| | Taking care of your biogas unit | ||
| | Making more biogas | ||
| | What more can you do? | ||
