| Acknowledgements | 第5-7页 |
| Table of contents | 第7-10页 |
| List of figures | 第10-11页 |
| List of tables | 第11-12页 |
| Abbreviations | 第12-14页 |
| Summary | 第14-16页 |
| 摘要 | 第17-19页 |
| Chapter One: General Introduction | 第19-26页 |
| 1.1. Background informations | 第19-20页 |
| 1.2. Introduction | 第20-25页 |
| 1.3. Objectives | 第25-26页 |
| 1.3.1. General objective | 第25页 |
| 1.3.2. Specific objectives | 第25-26页 |
| Chapter Two: Review of literature | 第26-51页 |
| 2.1. Aquaculture: Management and Concerns about sustainable aquaculture | 第26-32页 |
| 2.1.1. Major concerns | 第26-27页 |
| 2.1.2. Eutrophication | 第27-28页 |
| 2.1.3. Aquaculture management and biological treatment approaches | 第28-32页 |
| 2.2. Contribution of ecological engineering in treatment of aquaculture discharge | 第32-39页 |
| 2.2.1. Definition and concepts | 第32-33页 |
| 2.2.2. Ecological engineering design principles | 第33-34页 |
| 2.2.3. Fundamental criteria for a viable living technology | 第34-36页 |
| 2.2.4. Ecological engineering for purification, renovation and restoration | 第36-37页 |
| 2.2.5. Constructed wetland | 第37-38页 |
| 2.2.6. Ecological engineering for increased production, environmental improvement trough nutrients recycling | 第38-39页 |
| 2.3. Impacts of aquatic environmental changes to the fish behavior and physiology | 第39-48页 |
| 2.3.1. Water temperature | 第39-41页 |
| 2.3.2. Water pH | 第41-42页 |
| 2.3.3. Salinity | 第42-43页 |
| 2.3.4. Dissolved oxygen | 第43-45页 |
| 2.3.5. Carbon dioxide | 第45-46页 |
| 2.3.6. Ammonia | 第46-47页 |
| 2.3.7. Nitrites and nitrates | 第47-48页 |
| 2.4. Overview of the agro-environmental conditions in Burundi | 第48-51页 |
| Chapter Three: A cost effective technique for treating aquaculture discharge water using the grass species, Lolium perenne Lam as a biofilter | 第51-68页 |
| 3.1. Abstract | 第51页 |
| 3.2. Introduction | 第51-53页 |
| 3.3. Material and Methods | 第53-57页 |
| 3.4. Results | 第57-63页 |
| 3.4.1. Aquatic environmental changes when using L. perenne as a biofilter | 第57-58页 |
| 3.4.2. Comparative study of the recirculating and floating systems in nutrients removal efficiency | 第58-63页 |
| 3.4.3. Performance of Lolium perenne Lam in improving irrigation water | 第63页 |
| 3.5. Discussion | 第63-67页 |
| 3.6. Conclusions | 第67-68页 |
| Chapter Four: Potential bioremediation of aquacultural discharge using a combination of nitrobacteria clture solution and Lolium perenne Lam | 第68-85页 |
| 4.1. Abstract | 第68-69页 |
| 4.2. Introduction | 第69-70页 |
| 4.3. Material and Methods | 第70-73页 |
| 4.3.1. Effects of floating medium biofilter on Nitrogen dynamics | 第70-71页 |
| 4.3.2. Nutrients removal at different ammonia load and pH levels | 第71-72页 |
| 4.3.3. Nutrients removal at different ammonia load and different volumes of the nitrobacteria solution | 第72-73页 |
| 4.4. Results | 第73-81页 |
| 4.4.1. Effects of bacteria medium biofilter on Nitrogen dynamics | 第73-75页 |
| 4.4.2. Nutrients fluctuation at different ammonia load and different volumes of additive bacteria solution | 第75-77页 |
| 4.4.3. Nutrients removal at different ammonia load and different pH levels | 第77-81页 |
| 4.5. Discussion | 第81-84页 |
| 4.6. Conclusions | 第84-85页 |
| Chapter Five: Aquaculture solids management using a combination of sand/gravel or unwoven fabric bed with Lolium perenne Lam as a plant biofilter | 第85-96页 |
| 5.1. Abstract | 第85页 |
| 5.2. Introduction | 第85-87页 |
| 5.3. Material and Methods | 第87-89页 |
| 5.4. Results | 第89-93页 |
| 5.5. Discussion | 第93-95页 |
| 5.6. Conclusions | 第95-96页 |
| Chapter Six: General Conclusions and Recommendations | 第96-99页 |
| 6.1 General conclusions | 第96-97页 |
| 6.2 Applications of Research findings | 第97-98页 |
| 6.3 Recommendations | 第98-99页 |
| Chapter Seven: References | 第99-111页 |
