 |  | Improved Biogas Unit for Developing Countries (GTZ, 1991, 98 p.) | |
 |  | (introduction...) | |
| | Acknowledgments | |
| | Foreword | |
| | Acknowledgment | |
| | 1. Preface | |
| | 2. Why biogas ? | |
| | 3. Explanation of terms | |
| | 4. Biogas extension work | |
| | 5. The agricultural biogas unit | |
| | 6. Construction of the biogas plant | |
| | 7. Construction of cattle stable | |
| | 8. Construction of the pigsty | |
| | 9. The sanitary biogas unit | |
| | 10. Use of slurry | |
| | 11. Use of gas | |
| | 12. Operation and maintenance | |
| | 13. Pending technical issues | |
| | 14. Appendix | |
