| Acknowledgement | 第5-6页 |
| 摘要 | 第6-10页 |
| Abstract | 第10-14页 |
| Acronyms and abbreviations | 第22-24页 |
| 1. Chapter one:Introduction and thesis structures | 第24-35页 |
| 1.1 General Introduction | 第24-26页 |
| 1.2 General view of water resources and water pollution in China | 第26-30页 |
| 1.3 Problem statement and definitions | 第30-31页 |
| 1.4 Objectives of the research | 第31-32页 |
| 1.5 Scope of the study | 第32-33页 |
| 1.6 Thesis organization | 第33-35页 |
| 2. Chapter two: Literatures review and background | 第35-64页 |
| 2.1 Introduction | 第35-36页 |
| 2.2 Anaerobic treatment process | 第36-50页 |
| 2.2.1 Principle of anaerobic treatment | 第37页 |
| 2.2.2 Main conversion processes of organic matter in anaerobic reactor | 第37-42页 |
| 2.2.2.1 Hydrolysis | 第38-39页 |
| 2.2.2.2 Acidogenesis | 第39页 |
| 2.2.2.3 Aceteogenesis | 第39-40页 |
| 2.2.2.4 Methanogensis | 第40-42页 |
| 2.2.3 High rate anaerobic reactors | 第42页 |
| 2.2.4 Anaerobic filter | 第42-43页 |
| 2.2.5 Important factors affecting anaerobic treatment efficiency | 第43-49页 |
| 2.2.5.1 Temperature | 第44-46页 |
| 2.2.5.2 pH, Acidity and alkalinity | 第46-47页 |
| 2.2.5.3 Hydraulic retention time (HRT) | 第47-48页 |
| 2.2.5.4 Organic loading rate (OLR) | 第48-49页 |
| 2.2.6. Advantage and disadvantages of anaerobic filter | 第49-50页 |
| 2.3 Biological nutrients removal (BNR) | 第50-53页 |
| 2.3.1 Principle of biological nitrogen removal | 第50-53页 |
| 2.3.2 Enhanced biological phosphorus removal | 第53页 |
| 2.4 Constructed wetlands | 第53-64页 |
| 2.4.1 General background of constructed wetlands | 第53-56页 |
| 2.4.2 Type of constructed wetlands | 第56-59页 |
| 2.4.3 Pollutants removal processes in the constructed wetlands | 第59-62页 |
| 2.4.3.1 Suspended solids removal | 第59页 |
| 2.4.3.2 Organic matter removal | 第59-60页 |
| 2.4.3.3 Nitrogen removal | 第60页 |
| 2.4.3.4 Phosphorus removal | 第60页 |
| 2.4.3.5 Heavy metals removal | 第60-61页 |
| 2.4.3.6 Pathogens removal | 第61-62页 |
| 2.4.4 Role of constructed wetland plants | 第62-64页 |
| 3. Chapter three: Material and methods | 第64-79页 |
| 3.1 Introduction | 第64页 |
| 3.2 Process description | 第64-67页 |
| 3.3 System operation | 第67-68页 |
| 3.4 Experimental setup | 第68-74页 |
| 3.4.1 A pilot scale of the modified anaerobic- anoxic- oxic(A~2/O) process | 第68-71页 |
| 3.4.2 A laboratory scale of the modified A~2/O process | 第71-73页 |
| 3.4.3 Constructed wetland | 第73-74页 |
| 3.5 Wastewater characteristics, analytical techniques and system operation | 第74-78页 |
| 3.5.1 Raw wastewater characteristics | 第74-75页 |
| 3.5.2 Analytical methods | 第75-76页 |
| 3.5.3 Seeding and start-up period of the system reactors | 第76-77页 |
| 3.5.4 Taguchi orthogonal array design | 第77-78页 |
| 3.6 Summary | 第78-79页 |
| 4. Chapter four: Performance evaluation of the modified A~2/O process forrural domestic wastewater treatment at ambient temperature | 第79-109页 |
| 4.1 Introduction | 第79页 |
| 4.2 Brief background of A~2/O process | 第79-81页 |
| 4.3 Material and methods | 第81-84页 |
| 4.3.1 Experimental system and operation | 第81-83页 |
| 4.3.2 Domestic wastewater characteristics and analytic items | 第83-84页 |
| 4.4 Results and discussions | 第84-107页 |
| 4.4.1 Profiles of operational parameters of UAF treatment process | 第84-96页 |
| 4.4.1.1 Performance efficiency of UAF reactor in COD removal | 第85-92页 |
| 4.4.1.2 Volatile fatty acids (VFA) | 第92-93页 |
| 4.4.1.3 Biogas production rate | 第93-95页 |
| 4.4.1.4 Nutrient removal in the UAF reactor | 第95-96页 |
| 4.4.2 Anoxic/ Oxic treatment process efficiency | 第96-103页 |
| 4.4.2.1 Profile of DO operation parameter | 第96页 |
| 4.4.2.2 Performance efficiency of A/O reactors in COD removal | 第96-98页 |
| 4.4.2.3 Efficiency of nitrification and denitrification process in A/O reactors | 第98-101页 |
| 4.4.2.4 TP removal efficiency in the A/O reactors | 第101-103页 |
| 4.4.3 Overall treatment performance of the modified A~2/O process | 第103-107页 |
| 4.5 Summary | 第107-109页 |
| 5. Chapter five:Application of Taguchi orthogonal array design foroptimization the COD removal process | 第109-131页 |
| 5.1 Introduction | 第109-111页 |
| 5.2 Material and methods | 第111-114页 |
| 5.2.1 Experimental setup | 第111-112页 |
| 5.2.2 Taguchi orthogonal array (TOA) method | 第112页 |
| 5.2.3 Analytical methods | 第112-114页 |
| 5.3 Taguchi results and discussions | 第114-120页 |
| 5.3.1 General linear model | 第116-117页 |
| 5.3.2 Effect of pH on the COD removal process | 第117页 |
| 5.3.3 Effect of the temperature on the COD removal process | 第117-118页 |
| 5.3.4 Effect of HRT on the COD removal process | 第118-119页 |
| 5.3.5 Effect of the OLR on the COD removal process | 第119页 |
| 5.3.6 Prediction of the optimum COD removal efficiency | 第119-120页 |
| 5.4 Long term performance efficiency of the UAF reactor | 第120-123页 |
| 5.5 Evaluation of water dropping height in the oxic reactor regarding to NH_4~+ removal | 第123-126页 |
| 5.6 Long term performance efficiency of an integrated A/O process | 第126-129页 |
| 5.7 Summary | 第129-131页 |
| 6. Chapter six:Performance efficiency of the horizontal subsurface flowconstructed wetland | 第131-148页 |
| 6.1 Introduction | 第131页 |
| 6.2 Constructed wetlands background | 第131-134页 |
| 6.3 Material and methods | 第134-137页 |
| 6.3.1 Preparation of constructed wetland and test procedures | 第134-136页 |
| 6.3.2 Raw wastewater characteristics | 第136-137页 |
| 6.4 Plants growth parameters | 第137-139页 |
| 6.5 Performance efficiency of the constructed wetland | 第139-147页 |
| 6.5.1 COD removal efficiency | 第139-141页 |
| 6.5.2 TN and NH_4~+-removal efficiency | 第141-145页 |
| 6.5.3 TP removal efficiency | 第145-147页 |
| 6.6 Summary | 第147-148页 |
| 7. Chapter seven:Overall assessment of the bio-ecological combined systemperformance efficiency for rural domestic wastewater treatment | 第148-155页 |
| 7.1 Introduction | 第148页 |
| 7.2 Efficiency of the bio-ecological combined system in COD removal | 第148-150页 |
| 7.3 Efficiency of the bio-ecological combined system in TN removal | 第150-151页 |
| 7.4 Efficiency of the bio-ecological combined system in NH_4~+-N removal | 第151-152页 |
| 7.5 Efficiency of the bio-ecological combined system in TP removal | 第152-153页 |
| 7.6 Summary | 第153-155页 |
| 8. Chapter eight: Conclusions and Recommendations | 第155-160页 |
| 8.1 Conclusions | 第155-158页 |
| 8.2 Recommendations | 第158-160页 |
| References | 第160-175页 |
| List of Publications | 第175-176页 |
