| Preface |
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xi | |
| Author |
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xv | |
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Chapter 1 Conventional Waste Activated Sludge Process |
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1 | (20) |
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1.1 Description of Main Units in the Process |
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1 | (4) |
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1.2 Rationale for Advanced Sludge Treatment |
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5 | (6) |
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1.3 Basic Principles of Anaerobic Digestion |
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11 | (6) |
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1.3.1 Hydrolytic Bacteria |
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12 | (1) |
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1.3.2 Fermentative Bacteria |
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12 | (1) |
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1.3.3 Acetogenic Bacteria |
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13 | (1) |
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1.3.3.1 Hydrogen-Producing Acetogenic Bacteria |
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13 | (1) |
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1.3.3.2 Hydrogen-Consuming Acetogenic Bacteria |
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14 | (1) |
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14 | (2) |
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1.3.5 Protein Degradation |
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16 | (1) |
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1.4 Theoretical Energy Aspects of Pre-Treatment |
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17 | (4) |
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Chapter 2 Biological Treatment of Sludge |
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21 | (22) |
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2.1 Introduction to the AB Process for Municipal Wastewater |
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21 | (2) |
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2.2 The High-Rate Contact Stabilization Process for Municipal Wastewater |
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23 | (1) |
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2.3 Process Configuration and Operating Conditions of a Pilot-Scale AB Process |
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24 | (3) |
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2.4 Performance of the AB Process |
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27 | (2) |
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2.5 Physicochemical Characteristics of A-Stage and B-Stage Sludges |
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29 | (3) |
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2.6 Biochemical Methane Potential of A-Stage and B-Stage Sludges |
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32 | (2) |
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34 | (1) |
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2.8 Physical Properties of Sludge Before and After Anaerobic Digestion |
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35 | (1) |
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2.9 High-Rate Activated Sludge Followed by Autotrophic Nitrogen Removal |
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36 | (1) |
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2.10 Anaerobic Membrane Bioreactor Followed by Autotrophic Nitrogen Removal |
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37 | (1) |
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2.11 Predation of Protozoa and Metazoa |
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38 | (1) |
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39 | (4) |
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Chapter 3 Biological Treatment of Sludge: Application of the AB Process to Industrial Wastewater |
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43 | (16) |
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43 | (3) |
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3.2 Process Configuration and Operating Conditions |
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46 | (3) |
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3.3 Performance of the A-Stage |
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49 | (1) |
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3.4 Effect of Dissolved Oxygen on the Performance of the A-Stage |
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50 | (1) |
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3.5 Effect of Fe3+ Dosage on the Performance of the A-Stage |
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50 | (5) |
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3.6 Methane Potential and Calorific Value of the A-Stage Sludge |
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55 | (2) |
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3.7 Electricity Consumption |
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57 | (1) |
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58 | (1) |
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Chapter 4 Thermal/Biological Treatment of Sludge |
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59 | (18) |
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4.1 Thermal/Biological Treatment in the Return Activated Sludge (RAS) Line |
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59 | (1) |
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4.2 Thermal/Biological Pre-Treatment Below 100°C |
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60 | (6) |
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4.3 Thermal Treatment Above 100°C |
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66 | (11) |
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66 | (2) |
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4.3.2 Effects of Thermal Treatment on Sludge Solubilization |
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68 | (1) |
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4.3.3 Effect of Thermal Treatment on Anaerobic Biodegradability |
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69 | (2) |
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4.3.4 Effect of Thermal Treatment on Viscosity, Dewaterability and Foam Control |
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71 | (1) |
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4.3.5 Mass Balance of Thermal Hydrolysis |
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71 | (1) |
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4.3.6 Energy Balance of Thermal Hydrolysis |
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72 | (5) |
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Chapter 5 Mechanical Treatment of Sludge |
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77 | (6) |
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77 | (1) |
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77 | (1) |
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5.3 Lysis-Thickening Centrifuge |
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77 | (1) |
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5.4 High-Pressure Homogenizer |
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78 | (3) |
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5.5 Electrokinetic Disintegration |
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81 | (2) |
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Chapter 6 Chemical Treatment of Sludge |
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83 | (30) |
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83 | (1) |
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6.2 Alkaline Pre-Treatment |
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83 | (5) |
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6.3 Alkaline/Mechanical Pre-Treatment of Sludge |
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88 | (2) |
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90 | (1) |
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6.5 Fenton Oxidation Pre-Treatment |
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91 | (2) |
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93 | (15) |
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93 | (1) |
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6.6.2 Quantification Units |
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94 | (1) |
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6.6.3 Laboratory Set-Up and Conditions |
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94 | (2) |
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6.6.3.1 Effective Ozone Dosage |
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96 | (1) |
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6.6.3.2 Actual Ozone Dosage |
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96 | (1) |
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6.6.4 Effect of Ozone Pre-Treatment on Sludge Solubilization |
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97 | (6) |
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6.6.5 Effect of Ozone Pre-Treatment on Anaerobic Biodegradability |
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103 | (3) |
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6.6.6 Full-Scale Application of Ozone for Sludge Treatment |
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106 | (2) |
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6.7 Free Nitrous Acid Pre-Treatment |
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108 | (1) |
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6.8 Enzymatic Pre-Treatment |
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109 | (4) |
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Chapter 7 Thermal/Chemical Pre-Treatment of Sludge |
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113 | (4) |
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Chapter 8 Physical Pre-Treatment of Sludge: Ultrasound |
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117 | (36) |
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8.1 Introduction and Mechanisms of Ultrasound |
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117 | (2) |
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8.2 Application of Ultrasound on Sludge |
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119 | (2) |
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8.3 Quantification of Ultrasonication Energy Input |
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121 | (1) |
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8.4 Quantification of Solubilization Due to Ultrasonication |
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122 | (1) |
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8.5 Effect of Power Density on Sludge Solubilization |
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122 | (1) |
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8.6 Effect of Probe Amplitude on Sludge Solubilization |
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123 | (2) |
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8.7 Effect of Ultrasonication Frequency |
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125 | (1) |
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8.8 Effect of Total Solids Content of Sludge |
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125 | (1) |
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8.9 Effect of Ultrasound on Solubilization of WAS |
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126 | (1) |
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8.10 Effect of Ultrasonication on Biopolymers and Extra-Polymeric Substances Solubilization |
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127 | (1) |
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8.11 Effect of Ultrasonication on Divalent Ions Solubilization |
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128 | (1) |
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8.12 Effect of Ultrasonication on Anaerobic Digestion |
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129 | (7) |
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8.13 Process Configurations and Operating Conditions |
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136 | (1) |
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8.14 Performance of Ultrasonication Pre-Treatment |
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137 | (6) |
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8.15 Effect of Ultrasound Pre-Treatment on Sludge Dewaterability |
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143 | (1) |
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8.16 Effect of High Ultrasound Dosage |
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144 | (1) |
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8.17 Effect of Ultrasound on Bacterial Activity |
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144 | (1) |
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8.18 Full-Scale Ultrasonication Treatment of Sludge |
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144 | (9) |
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8.18.1 Avonmouth, Wessex Water, United Kingdom |
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146 | (1) |
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8.18.2 Severn Trent Water, United Kingdom |
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146 | (1) |
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8.18.3 Anglian Water, United Kingdom |
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147 | (1) |
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147 | (1) |
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8.18.5 Orange County Sanitation District, United States |
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147 | (1) |
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8.18.6 Beenyup WWTP, Australia |
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148 | (1) |
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8.18.7 Meldorf WWTP, Germany |
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149 | (1) |
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8.18.8 Bamberg WWTP, Germany |
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149 | (1) |
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8.18.9 Leinetal WWTP, Germany |
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150 | (3) |
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Chapter 9 Combination of Ultrasound and Thermal Pre-Treatments |
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153 | (18) |
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153 | (3) |
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9.2 Effect of Temperature During the ULS-Thermal Pre-Treatment of Sludge |
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156 | (2) |
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9.3 Ultrasound-Thermal Pre-Treatment at 55°C |
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158 | (1) |
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9.4 Ultrasound-Thermal Pre-Treatment at 65°C |
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159 | (5) |
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9.5 Qualitative Analysis of Indigenous Enzymes During Ultrasound and Thermal Pre-Treatment |
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164 | (2) |
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9.6 Solids Removal During Ultrasound and Thermal Pre-Treatment |
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166 | (2) |
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9.7 Effect of the Combined Pre-Treatments on Anaerobic Biodegradability |
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168 | (1) |
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169 | (2) |
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Chapter 10 Physicochemical Treatment: Application of Microwave and Chemical Treatment of Sludge |
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171 | (8) |
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10.1 Introduction to Microwave Treatment of Sludge |
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171 | (1) |
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10.2 Microwave/H2O2 Pre-Treatment |
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172 | (3) |
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10.3 Microwave/Alkaline Pre-Treatment |
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175 | (4) |
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Chapter 11 Physicochemical Treatment: Combination of Alkaline and Ultrasonic Pre-Treatment of Sludge |
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179 | (20) |
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179 | (4) |
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11.2 Process Configuration and Operating Conditions |
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183 | (1) |
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11.3 Performance of Individual Pre-Treatments |
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184 | (1) |
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11.4 Sludge Solubilization During Combined Pre-Treatment |
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185 | (4) |
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11.5 Molecular Weight Distribution of Solubilized Organics |
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189 | (3) |
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11.6 Fluorescent Products Characterization of Solubilized Organics |
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192 | (2) |
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11.7 Anaerobic Biodegradability of Pre-Treated Sludge |
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194 | (2) |
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196 | (3) |
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Chapter 12 Physicochemical Treatment: Combination of Ozone and Ultrasonic Pre-Treatment of Sludge |
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199 | (36) |
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199 | (3) |
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12.2 Process Configuration and Operating Conditions |
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202 | (3) |
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12.3 Performance of Individual Pre-Treatments |
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205 | (1) |
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12.3.1 COD and Biopolymers Solubilization |
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205 | (1) |
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206 | (1) |
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12.4 Performance of Combined Pre-Treatment |
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206 | (10) |
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12.4.1 Determination of the Best Combination Sequence |
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206 | (3) |
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12.4.2 Sludge Solubilization |
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209 | (1) |
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12.4.3 Molecular Weight Distribution |
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210 | (2) |
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12.4.4 Anaerobic Digestion of the Pre-Treated Sludge |
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212 | (4) |
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216 | (1) |
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12.6 Kinetic Analysis of the Anaerobic Digestion Process |
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217 | (1) |
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12.7 Optimization of ULS-Ozone Conditions |
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217 | (4) |
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12.8 Conclusions of the Batch Process |
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221 | (1) |
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12.9 Performance of a Continuous Process |
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221 | (13) |
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12.9.1 Process Configuration and Operating Conditions |
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221 | (1) |
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12.9.2 Biogas Production and Solids Removal in the Continuous Process |
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222 | (5) |
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12.9.3 SCOD and Soluble Biopolymers in the Digested Sludge |
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227 | (1) |
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12.9.4 Dewaterability of Digested Sludge |
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228 | (1) |
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12.9.5 Ammonia-Nitrogen in Digested Sludge |
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229 | (1) |
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12.9.6 Molecular Weight Distribution of Organics in Digested Sludge |
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230 | (1) |
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12.9.6.1 High MW Compounds |
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230 | (1) |
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12.9.6.2 Low MW Compounds |
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231 | (1) |
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12.9.7 Fluorescent Products in the Digested Sludge |
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232 | (1) |
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12.9.7.1 Humic Acid-Like Substances |
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233 | (1) |
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12.9.7.2 Fulvic Acid-Like Substances |
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233 | (1) |
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12.10 Conclusions of the Continuous Process |
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234 | (1) |
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Chapter 13 Comparison of the Effects of Ultrasonication, Ultrasonication-Ozonation and Ultrasonication-Alkaline Pre-Treatments of Sludge in Continuous Anaerobic Process |
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235 | (10) |
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235 | (1) |
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13.2 Biogas Production and Solids Removal |
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235 | (1) |
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13.3 SCOD and Dewaterability in Digested Sludge |
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236 | (4) |
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13.4 Molecular Weight Distribution |
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240 | (2) |
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240 | (1) |
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241 | (1) |
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13.5 Fluorescent Products Characterization |
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242 | (2) |
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13.5.1 Humic Acid--Like Substances |
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243 | (1) |
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13.5.2 Fulvic Acid--Like Substances |
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243 | (1) |
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244 | (1) |
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Chapter 14 Physicochemical Treatment: Application of Ozone, Ultrasonic and Alkaline Post-Treatment of Sludge |
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245 | (24) |
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245 | (1) |
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14.2 Process Configuration and Operating Conditions |
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246 | (1) |
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14.3 Particle Size Reduction Following Post-Treatment |
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247 | (1) |
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14.4 COD and Biopolymers Solubilization During Post-Treatment |
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248 | (1) |
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14.5 Molecular Weight Distribution of Solubilized Organics |
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249 | (1) |
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14.6 Characterization of Fluorescent Products in Solubilized Organics |
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250 | (2) |
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14.7 Batch Anaerobic Re-Digestion Following the Post-Treatments |
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252 | (2) |
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252 | (2) |
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14.7.2 Change in SCOD during Anaerobic Digestion |
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254 | (1) |
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14.8 Conclusions of the Batch Re-Digestion |
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254 | (1) |
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14.9 Performance of a Continuous Process with Post-Treatment |
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255 | (11) |
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255 | (1) |
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14.9.2 Pre- and Post-Treatment Conditions |
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256 | (1) |
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257 | (4) |
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14.9.4 Microbial Stress during Semi-Continuous Anaerobic Digestion |
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261 | (1) |
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14.9.5 Performance of the Continuous Post-Treatment Processes |
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261 | (5) |
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14.9.6 Conclusions of the Continuous Processes with Post-Treatments |
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266 | (1) |
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14.10 Conclusions and Future Prospects |
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266 | (3) |
| References |
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269 | (26) |
| Index |
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295 | |