The first section of urban sewage quality and harm 1
Composition of sewage in a town 1
Second, the quality of urban sewage is 1
Harm of pollutants in sewage of Sanzhen 3
In the second quarter, urban sewage treatment methods 4
Physical therapy method 4
Chemical treatment method 5
Three biological treatment methods 5
Section III Level and Technology of Urban Sewage Treatment 7
The degree of sewage treatment in a town
Treatment method of secondary sludge 8
Process flow of Sanzhen Sewage Treatment Plant 10
Chapter II Water Distribution Wells and Metering Facilities of Regulating Pool 1 1
Section 1 Regulating Pool 1 1
Design overview 1 1
Two calculation examples 12
Example 2. 1 Calculate the mixing tank according to the hourly flow curve 12.
Example 2.2 Calculate the mixing tank 14 according to the cumulative flow curve.
Design and calculation of for SBR tank 14 mixing tank
Section II Water Distribution Well 16
Design overview 16
Two calculation examples 17
Example 2.4 Design calculation of weir water distribution well 17
Section III Measuring Facilities 17
Design overview 17
(1) type and structure 17
(ii) General provisions 19
Two calculation examples 20
Example 2.5 Design and Calculation of Babbitt Metal Measuring Tank 20
Example 2.6 Design calculation of measuring triangle weir 2 1
Chapter III Pretreatment Facilities 23
The first grid 23
Design overview 23
Two calculation examples 24
Example 3. 1 grid design calculation 24
Example 3.2 Selection and calculation of grid decontamination machine equipment 26
In the grit chamber 26 in the second quarter
Horizontal grit chamber 26
Design overview 26
(2) Calculation Example 26
Example 3.3 Design and calculation of advection grit chamber 26
Two vertical flow grit chambers 28
Design overview 28
(2) Calculation Example 29
Example 3.4 Design and calculation of vertical flow grit chamber 29
Three aeration grit chambers 30
Design overview 30
(II) Calculation Example 30
Example 3.5 Design and Calculation of Aerated grit chamber 30
Four-vortex grit chamber 3 1
(1) Design Overview 3 1
(II) Calculation Example 33
Example 3.6 Selection and calculation of vortex grit chamber 33
The fourth chapter 35 primary sedimentation tank
The first horizontal primary sedimentation tank 36
Design overview 36
Two calculation examples 38
Example 4. Design and Calculation of1advection primary sedimentation tank 38
The second vertical primary sedimentation tank 40
Design overview 40
Two calculation examples 40
Example 4.2 Design and Calculation of Vertical Primary Sedimentation Tank 40
The third radial primary sedimentation tank 42
Design overview 42
Two calculation examples 44
Example 4.3 Design and calculation of radial primary sedimentation tank 44
The fourth inclined plate (tube) primary sedimentation tank 45
Design overview 45
Two calculation examples 46
Example 4.4 Design and calculation of inclined plate (pipe) primary sedimentation tank 46
Chapter V Strengthening Primary Treatment Facilities 48
The first water hydrolysis (acidification) process 48
Design overview 48
Two calculation examples 49
Example 5. 1 design and calculation of hydrolysis (acidification) tank 49
Section II Chemical Flocculation Strengthening Process 50
Design overview 50
Two calculation examples 5 1
Example 5.2 Calculation of Chemical Flocculation Strengthening Facilities 5 1
Chapter VI Aerobic Activated Sludge Treatment Facilities 53
The first part of the traditional activated sludge process 53
Design overview 53
Two design examples 54
Example 6. 1 A plug aeration tank 54 was designed according to the sludge loading method.
Example 6.2 A plug aeration tank 60 was designed according to the sludge aging method.
Example 6.3 Design of Fully Mixed Aeration Tank 6 1
Example 6.4 Process Design and Calculation of Activated Sludge by Stage Aeration 64
Example 6.5 Process Design and Calculation of Activated Sludge Adsorption Regeneration 67
Section II Nitrogen and Phosphorus Removal by Activated Sludge Process 68
A 1/O biological denitrification process 69
(a) process characteristics 69
(2) Design parameters and equipment 69
(3) Calculation Example 70
Example 6.6A 1/O biological nitrogen removal process design calculation 70
A2/O biological phosphorus removal process 76
(a) process characteristics 76
(2) Design parameters and equipment 77
(3) Calculation Example 77
Example 6.7A2/O biological phosphorus removal process design calculation 77
Three-stage A2/O biological nitrogen and phosphorus removal process 79
(a) process characteristics 79
(2) Design parameters and equipment 80
(3) Calculation Example 80
Example 6.8A2/O biological nitrogen and phosphorus removal process design calculation 80
4 Improved A2/O biological nitrogen and phosphorus removal process 83
(a) process characteristics 83
(2) Design parameters and equipment 83
(3) Calculation Example 83
Example 6.9 Design of Improved A2/O Biological Nitrogen and Phosphorus Removal Process
Calculation 83
Section 3 adsorption. Biodegradation method of activated sludge 87
Process characteristics 87
Design parameters and equipment 88
Three calculation examples 88
Example 6. 10AB process design calculation 88
The fourth quarter oxidation ditch 92
92 overview
Two. Technical features 93
Types and basic forms of oxidation ditch 93
Siobel oxidation ditch 93
(a) technical features 93
(2) Design parameters and equipment 94
(3) Calculation Example 95
Example 6. 1 1 Aubert oxidation ditch process design calculation 95
Five Pasville oxidation ditch 100
(a) process characteristics 100
(2) Main design parameters and equipment 100
(3) Calculation example 100
Example 6. 12 process design calculation Pasville oxidation ditch 100
Six oxidation ditches working alternately 104
(1) Process characteristics 104
(2) Design parameters and equipment 104
(3) Calculation example 104
Example 6. 13 process design calculation of three-ditch oxidation ditch 104
Oxidation ditch in Chikarussel 108
(1) Process characteristics 108
(2) Design parameters 109
(3) Calculation example 109
Example 6. 14 carrousel oxidation ditch 109 process design calculation
Eight improved carrousel oxidation ditch 1 12
(1) Process characteristics 1 12
(2) Design parameter 1 13
(3) Calculation example 1 13
Example 6. 15 process design calculation of improved carrousel oxidation ditch 1 13
Section 5 Batch Activated Sludge Process 1 17
Design overview 1 17
Two calculation examples 1 18
Example 6. 16 classic SBR process design 1 18
Example 6. 17CASS process design calculation 120
Section VI Design of Activated Sludge Mathematical Model Bioreactor 122
Brief Introduction of Activated Sludge Mathematical Model (ASM 1) 123
Function model of activated sludge 127
Iii. the design steps are the same as ASM 1 127.
Four calculation examples 128
Example 6. 18 fully mixed aeration tank 128 is designed with ASM 1.
Example 6. 19 ASM 1 design stage aeration tank 134 was adopted.
Example 6.20 Calculation of plug-flow aeration tank 137 with ASM 1
Example 6.2 1 Calculation of adsorption and regeneration process with ASM 1 139.
Example 6.22 Calculation of A/O nitrogen removal process with ASM 1 14 1
Section VII Membrane Bioreactor 143
Design overview 143
Two calculation examples 145
Example 6.23 Design and Calculation of Submerged MBR 145
Section VIII Composite Bioreactor 148
Design overview 148
Two calculation examples 149
Example 6.24 Calculation of Composite Bioreactor 149
Chapter VII Biofilm Treatment Facilities 15 1
Section 1 Biological Filter 15 1
Filter type and parameters 15 1
Two common biofilters 15 1
(1) General provisions 15 1
(2) Calculation example 15 1
Example 7. 1 Calculation of common biofilter by volume loading method 15 1.
Example 7.2 Calculation of common biofilter 152 by dynamic formula method.
Three high-load biofilters 153
(1) General Conditions 153
(2) Calculation example 153
Example 7.3 Calculation of High Load Biofilter 153 by Area Load Method
Example 7.4 Calculation of High Load Biofilter 154 by Volume Load Method
Four-tower biofilter 155
(1) General Conditions 155
(2) Calculation example 155
Example 7.5 Calculation of Tower Biofilter 155
Five-stage biological filter oxygen demand 156
Example 7.6 Calculation of Biological Filter 156 Oxygen Demand
6 biological filter water distribution system 157
(1) General Conditions 157
(2) Calculation example 157
Example 7.7 Calculation of Fixed Nozzle Water Distributor 157
Example 7.8 Calculation of Rotating Water Distributor 158
Drainage and ventilation system of seven-stage biological filter 160
Sludge volume of eight-stage biological filter 160
Example 7.9 Calculation of Sludge Volume in High-load Biofilter 16 1
The second quarter biological turntable 162
Design overview 162
Two calculation examples 163
Example 7. Calculation of10 biological turntable 163
Section 3 Biological Contact Oxidation Method 165
Design overview 165
Two calculation examples 166
Example 7. 1 1 calculation of secondary biological contact oxidation tank 166
Example 7. Calculation of12 contact sedimentation tank (two-stage type) 168
Example 7. 13 Calculation of Primary Biological Contact Oxidation Tank 170
The fourth quarter biological aerated filter 17 1
Design overview 17 1
Two calculation examples 172
Example 7. 14DC BAF calculation 172
Example 7. 15N BAF calculation 175
Example 7. Calculation of16 DN separated biological aerated filter 176
Example 7. Calculation of17 combined DN biological aerated filter 178
Section 5 Biological Fluidized Bed 179
Design overview 179
Two calculation examples 180
Example 7. 18 Volume calculation of aerobic three-phase fluidized bed 180
Chapter VIII Natural Purification Facilities 18 1
Section 1 Stabilization Pond 18 1
A stable pond type and selection 18 1
Anaerobic pond 182
(1) design parameters 182
(2) Calculation example 182
Example 8. Calculation of Ordinary Aerobic Pool 182 by1area load method
Example 8.2 Calculation of common aerobic tank 183 by Oswald method.
Example 8.3 Ordinary aerobic tank 184 is calculated by Wehner. Weah Mufa.
Three religions and nine streams pond 185
(1) design parameters 185
(2) Calculation example 186
Example 8.4 Calculation of Aerobic Pool 186 by Area Load Method
Example 8.5 Calculation of Aerobic Pool 187 by Curve Graphic Method
Si anaerobic tank 188
(1) design parameters 188
(2) Calculation example 188
Example 8.6 Anaerobic pool calculation 188
Wu aerated pond 190
(1) design parameters 190
(2) Calculation example 190
Example 8.7 Calculation of Series 190 Isovolumetric Aerobic aerated pond
Example 8.8 Calculate the aerobic aerated pond 19 1 with the removal rate.
The sludge volume of Liupingtang is 192.
Example 8.9 Calculation of Sludge Volume in Stabilized Pond (1) 192
Example 8. Calculation of Sludge Volume in10 Stabilized Pond (2) 192
Removal of Nitrogen and Phosphorus by qi Stabilization Pond 193
Other relevant design calculations of the eighth stabilization pond 193
(1) design and calculation of water inlet and outlet 193
Example 8. 1 1 stabilization pond 193 design and calculation of import and export
(2) Length-width ratio design of stabilization pond 195
(3) Design of diversion wall 195
(4) The comprehensive work and treatment efficiency of the stabilization pond is 196.
Section 2 Land Treatment 197
Types and parameters of land treatment 197
(1) Applicable conditions 197
(II) Design parameters and treatment effect 197
Two slow infiltration systems 198
(1) design conditions 198
(2) Calculation example 198
Example 8. 12 Calculation of Slow Permeability System 198
Three rapid infiltration systems 20 1
(1) design condition 20 1
(2) Calculation Example 20 1
Example 8. Calculation of13 Rapid Infiltration System 20 1
The four-sided water injection system 202
(1) Suitable conditions and design parameters 202
(2) Calculation Example 203
Example 8. Calculation of14 Surface Overflow System 203
V. Wetland Treatment System 204
(1) design conditions
(2) Calculation Example 204
Example 8. 15 calculation of surface flow wetland treatment 204
Example 8. 16 calculation of subsurface flow wetland treatment 205
6 Design of water inlet and outlet for land treatment 206
(a) Design of water intake for land treatment 206
(2) Design of land treatment wastewater 208
Chapter 9 Secondary sedimentation tank 2 10
Section 1 Characteristics and design points of secondary sedimentation tank 2 10
I. Difference between the second sedimentation tank and the first sedimentation tank 2 10
Choose 2 10 for the double pool type.
Three design points 2 1 1 2-stage advection secondary sedimentation tank 2 13
Design overview 2 13
Two calculation examples 2 15
Example 9. 1 Calculate the horizontal secondary sedimentation tank 2 15 according to the sedimentation time and horizontal velocity.
Example 9.2 Calculation of inlet and outlet system of advection sedimentation tank 2 16
Example 9.3 According to the settlement test, the area of the secondary sedimentation tank is 2 17.
Section III Radial Secondary Sedimentation Tank 2 18
Design overview 2 18
Two calculation examples 220
Example 9.4 Design and Calculation of Ordinary Radial Secondary Sedimentation Tank 220
Example 9.5 Design and calculation of radial secondary sedimentation tank with centripetal flow 223
The fourth inclined plate (tube) secondary sedimentation tank 224
Design overview 225
Two calculation examples 225
Example 9.6 Design and calculation of inclined tube secondary sedimentation tank 225
Chapter X Disinfection Facilities 227
The first section liquid chlorine disinfection 227
Design overview 227
Two calculation examples 229
Example 10. 1 design and calculation of liquid chlorine disinfection process 229
In the second quarter chlorine dioxide disinfection 230
Design overview 230
Two calculation examples 230
Example 10.2 chlorine dioxide disinfection design calculation 230
Section III Ozone Disinfection 23 1
Design overview 23 1
Two calculation examples 234
Example 10.3 ozone disinfection process calculation 234
The fourth quarter ultraviolet disinfection 234
Design overview 234
Two calculation examples 236
Example 10.4 ultraviolet disinfection process calculation 236
Section 5 Contact Pool 237
Design overview 237
Two calculation examples 238
Example 10.5 contact unit process calculation 238
Chapter 11 Sludge Treatment and Deodorization Facilities 239
The first section sludge treatment target and process flow 239
In the second quarter sludge production calculation 240
Design overview 240
Two calculation examples 242
Example 1 1. 1 Calculation of sludge moisture content 242
Example 1 1.2 Calculation of sludge relative density 242
Example 1 1.3 Calculation of Digested Sludge Volume 242
In the third quarter sludge pipeline transportation 243
Design overview 243
Two calculation examples 245
Example 1 1.4 Calculation of sludge conveying pipeline 245
The fourth quarter sludge concentration 245
Design overview 245
Two calculation examples 248
Example 1 1.5 Design continuous gravity concentration tank 248 by experimental method.
Example 1 1.6 Design of continuous gravity concentration tank 250 for sludge solid flux.
Example 1 1.7 design and calculation of air flotation concentrator 25 1
Section 5 Anaerobic Digestion of Sludge 252
Design overview 253
Two calculation examples 255
Example 1 1.8 Digester Volume Calculation 255
Example 1 1.9 Thermal Balance Calculation of Moderate Temperature Sludge Digestion System 257
Example 1 1. 10 Calculation of sludge gas circulation stirring in digester 26 1
Example11.11Design of biogas collection and storage system in sludge digester 262
Section 6 Aerobic Digestion of Sludge 263
Design overview 263
(a) the basic principles and characteristics of 263
(2) Design Points 264
Two calculation examples 265
Example 1 1. 12 sludge aerobic digester and calculation of air demand 265
Section 7 Sludge Drying and Dehydration 267
Design overview 267
Two calculation examples 268
Example: 1 1. 13 Design and calculation of sludge drying field1666666666666
Example 1 1. 14 design and calculation of sludge vacuum drum filter dehydrator 269
Example 1 1. 15 design and calculation of sludge frame filter press 270
Example 1 1. 16 design and calculation of sludge dewatering for roller belt filter press 27 1
Section 8 Sludge Drying and Incineration 272
Design overview 272
Two calculation examples 275
Example 1 1. 17 Design and calculation of sludge drying and incineration 275
Section 9 Deodorization Facilities of Sewage Treatment Plant 277
Design overview 277
Two. Design points 279
Three calculation examples 280
Example 1 1. 18 deodorization calculation of 280 in water intake pump house and coarse grid workshop
Example 1 1. 19 calculation of high-energy ion deodorization in primary sedimentation tank 280
Chapter XII Process Facilities for Tertiary Treatment of Urban Sewage
Section 1 Purpose, Contents and Methods of Three-level Governance 282
The purpose of three-stage treatment 282
Contents of two-stage or three-stage processing 282
Three-stage therapy 283
Technology 283
(II) Method 283
The second high-density sedimentation tank 284
I. Structure and characteristics 284
(1) process structure 284
(II) Technical Features 285
(3) Performance characteristics 286
Two key parts design 286
Three calculation examples 287
Example 12. 1 design and calculation of high-density sedimentation tank 287
Section III Filtering Facilities 29 1
V filter 29 1
(1) Design Overview 29 1
(2) Calculation Example 293
Example 12.2V filter design calculation 293
The double fluidized bed filter 297
Design overview 297
(2) Calculation Example 299
Example 12.3 design and calculation of fluidized bed filter 299
Three-sided filter 30 1
(1) design overview 30 1
(2) Calculation Example 303
Example 12.4 selection calculation of rotating filter 303
Section 4 Denitrification and Chemical Phosphorus Removal Facilities 304
Denitrification equipment 304
Chemical phosphorus removal facility 305
(a) design overview 305
(2) Calculation Example 305
Example 12.5 estimation of the dosage of chemical phosphorus remover 305
Chapter 13 Vertical Design Calculation of Sewage Treatment Plant 307
Section 1 Purpose, Significance and Requirements of Vertical Design 307
I. Purpose and significance 307
Two. General provisions 307
In the second quarter, the vertical design process calculation 307
Example 13. 1 Vertical Layout Process of Sewage Treatment Plant
Calculation 307
Appendix 328
Appendix 1 Pollutant Discharge Standard for Urban Sewage Treatment Plants (GB 189 18—2002)328
Appendix II Comprehensive Wastewater Discharge Standard (GB 8978- 1996) (Abstract) 334
Appendix III Water Quality Standard for Sewage Discharged into Urban Sewers (GB 343-2010) (Abstract) 34 1
Appendix IV Monthly Visible Light Radiation at Sea Level at Different Latitudes 342
Appendix V Sunshine Hours and Sunshine Percentage of Major Cities in China 343
Appendix VI Atmospheric Pressure at Different Altitudes 345
Appendix VII Stoichiometric and Kinetic Parameters of Common Biological Reactions in Municipal Sewage Treatment 345
Appendix VIII Thermal indexes of common building materials 346
Appendix ix Solubility (Saturation) of Oxygen in Distilled Water 346
Reference 347