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Evaluating Anaerobic Digesters Energy Generation Opportunities and Barriers in Africa

by

Stephen Karekezi, Waeni Kithyoma and Oscar Onguru


Table of Contents

1.0 BACKGROUND AND INTRODUCTION
                         

10

1.1 Description of the technology                                            

10

1.2 Advantages and drawbacks of Biogas                                      

15

2.0 BIOGAS ENERGY POTENTIAL AND DISSEMINATION                                     

17

2.1 Potential and Dissemination of Biogas Technologies Global Examples

17

2.2 Biogas Potential and Dissemination in Africa

18

3.0 KEY DRIVERS AND BARRIERS FOR BIOGAS DEVELOPMENT
                                 

21

3.1 Key Drivers

21

3.2 Barriers

22

4.0 KEY FACTORS FOR BIOGAS DEVELOPMENT
                                           

24

4.1 Policy and institutional issues

24

4.2 Financing Issues

24

4.3 Technical / Capacity Issues                                           

24

5.0 RECOMMENDATIONS
                               

26

5.1 Policy Options     

26

5.2 Financing options              

26

5.3 Technical            

20

6.0 BIBLIOGRAPHY                         

29

7. 0 APPENDICES:                          

32

7.1 Technical potential of Biogas in Africa                             

34

7.2 Biogas Project in Tanzania                                       

36

7.3 Biogas Digester Cost Comparison

36

 

List of Tables

 

Table 1: Comparison of Different sizes of biogas digesters

14

Table 2: Energy generation costs from various renewable energy sources

17

Table 3: Potential of Biogas in Nepal (2007)

18

Table 4: Dissemination of Domestic and Institutional Biogas Systems in Asia

18

Table 5: Technical Potential of Biogas Digesters in Africa

19

Table 6: Number of Installed Biogas Digesters in Selected Countries of Africa

19

Table 7: Job Creation Potential of Bio-fuels

22

Table 8: Biogas Units in Kenya: Key Features

23

List of Figures

 

Figure 1: Flow sheet of a medium large scale biogas plant

13

Figure 2: Fixed Dome Digester

15

List of Boxes

 

Box 1: Small-scale Biogas Technologies in Use in Kenya

15

Box 2: Why biogas projects failed in Kenya

26

Box 3: Biogas Sector Partnership (BSP) and Clean Development Mechanism (CDM)

28

Box 4: Case Example Bio-digesters and micro loans for farmers in Cambodia

29

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