 |  | 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 |