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Sustainable Treatment and Reuse of Municipal Wastewater

Sustainable Treatment and Reuse of Municipal Wastewater

Menahem Libhaber | Alvaro Orozco Jaramillo

(2012)

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Book Details

Abstract

In many countries, especially in developing countries, many people are lacking access to water and sanitation services and this inadequate service is the main cause of diseases in these countries. Application of appropriate wastewater treatment technologies, which are effective, low cost (in investment and especially in operation and maintenance), simple to operate, proven technologies, is a key component in any strategy aimed at increasing the coverage of wastewater treatment. 
Sustainable Treatment and Reuse of Municipal Wastewater presents the concepts of appropriate technology for wastewater treatment and the issues of strategy and policy for increasing wastewater treatment coverage. The book focuses on the resolution of wastewater treatment and disposal problems in developing countries, however the concepts presented are valid and applicable anywhere and plants based on combined unit processes of appropriate technology can also be used in developed countries and provide to them the benefits described. 
Sustainable Treatment and Reuse of Municipal Wastewater presents the basic engineering design procedures to obtain high quality effluents by treatment plants based on simple, low cost and easy to operate processes.  The main message of the book is the idea of the ability to combine unit processes to create a treatment plant based on a series of appropriate technology processes which jointly can generate any required effluent quality. A plant based on a combination of appropriate technology unit processes is still easy to operate and is usually of lower costs than conventional processes in terms of investment and certainly in operation and maintenance. Chapters in the book are organized in a practical and accessible way to: 

  • Demonstrate selected unit process of appropriate technology and provide the scientific basis, the equations and the parameters required to design the unit processes, with some innovations developed by the authors.
  • Highlight design procedures for selected combined processes which are in use in developing countries.
  • Propose an innovative Orderly Design Method (ODM), which is easy to follow by practicing engineers, using the equations and formulas developed, once the fundamentals of each unit and combined process have been established. 
  • Provide a numeric example for the basic design of each selected appropriate technology process for a city with a population of 20,000 using the ODM and an Excel program which will be provided to the readers for download from an online web page. 
This book is a valuable and practical resource for all wastewater treatment engineers in field and the operational managers of waste treatment facilities. 
Authors: Menahem Libhaber, PhD, Consulting Engineer to the World Bank and other institutions, Alvaro Orozco Jaramillo, MSc, Consulting Engineer to the World Bank, the Inter-American Development Bank, Biwater and other institutions in various countries. 

Table of Contents

Section Title Page Action Price
Cover page 1
Half title page 2
Title page 3
Copyright page 4
Contents 5
About the Authors 12
Acknowledgements 14
Dedication 16
Preface 17
Nomenclature 21
Part 1 29
Concepts 29
Chapter 1 30
Appropriate technologies for treatment of municipal wastewater 30
1.1 INTRODUCTION 30
1.1.1 Wastewater treatment issues in developing countries 30
1.1.2 Effluent quality standards 32
1.2 WASTEWATER TREATMENT PRINCIPLES 34
1.2.1 Introduction 34
1.2.2 Key pollutants in municipal wastewater 34
1.2.3 Treatment processes and sequencing of treatment units 34
1.2.3.1 Treatment units sequencing and processes 34
1.2.3.2 Conventional secondary treatment processes 37
1.3 THE APPROPRIATE TECHNOLOGY CONCEPT 41
1.4 SUSTAINABILITY ASPECTS OF APPROPRIATE TECHNOLOGY PROCESSES 44
1.5 PROPOSED STRATEGY FOR WASTEWATER MANAGEMENT IN DEVELOPING COUNTRIES 46
1.5.1 The government’s perspective 46
1.5.2 The utility’s perspective 47
1.5.3 The strategy pillars 48
1.6 ANAEROBIC AND AEROBIC PROCESSES OF DECOMPOSITION OF ORGANIC MATTER 49
1.7 UNIT PROCESSES OF APPROPRIATE TECHNOLOGY FOR TREATMENT OF MUNICIPALWASTEWATER 52
1.7.1 Introduction 52
1.7.2 Main unit processes of appropriate technology 54
1.7.2.1 Rotating micro screens (RMS) 54
1.7.2.2 Vortex grit chambers 56
1.7.2.3 Anaerobic lagoons 57
1.7.2.4 Upflow anaerobic sludge blanket reactor (UASB) 61
1.7.2.5 Anaerobic filter 65
1.7.2.6 Lagoons systems 68
1.7.2.7 Stabilization reservoirs for effluent reuse for irrigation and for intermittent discharge of effluents to rivers 78
1.7.2.8 Constructed wetlands 93
1.7.2.9 Chemically Enhanced Primary Treatment (CEPT) 95
1.7.3 Additional unit processes of appropriate technology 98
1.7.3.1 Sand filters 98
1.7.3.2 Dissolved air flotation (DAF) 99
1.7.3.3 Overland flow 100
1.7.3.4 Infiltration-percolation 103
1.7.3.5 Septic tanks 105
1.7.3.6 Submarine and large rivers outfalls 106
1.8 COMMONLY USED COMBINED UNIT PROCESSES OF APPROPRIATE TECHNOLOGY 111
1.8.1 Introduction 111
1.8.2 A series of conventional stabilization lagoons 113
1.8.3 A series of improved stabilization lagoons 115
1.8.4 UASB followed by facultative lagoons 121
1.8.5 UASB followed by anaerobic filter 125
1.8.6 UASB followed by dissolved air flotation 130
1.8.7 Chemically Enhanced Primary Treatment (CEPT) followed by Sand Filtration 132
1.8.8 Pre-treatment of various types followed by a stabilization reservoir (Wastewater reuse for irrigation, the stabilization reservoirs concept) 133
1.8.9 UASB followed by anaerobic filter followed by dissolved air flotation followed by membrane filtration 138
1.9 ADDITIONAL POTENTIAL COMBINED PROCESSES OF APPROPRIATE TECHNOLOGY 139
1.9.1 Introduction 139
1.9.2 Additional potential combined processes 143
1.10 THE EFFECT OF TEMPERATURE ON WASTEWATER TREATMENT AND CLASSIFICATION OF APPROPRIATE TECHNOLOGY PROCESSES ACCORDING TO THEIR ADEQUACY FOR DIFFERENT TEMPERATURE ZONES 167
1.10.1 Introduction 167
1.10.2 Appropriate technology processes adequate for zones with seasons of very low temperatures 171
1.10.3 Appropriate technology processes adequate for zones with seasons of medium low temperatures 173
1.10.4 Appropriate technology processes adequate for zones with seasons of mild low temperatures 174
1.11 PROCESSES ADEQUATE FOR PROJECTS IN WHICH THE LAND AREA AVAILABLE FOR WASTEWATER TREATMENT IS LIMITED 180
1.11.1 The size of land area occupied by various appropriate technology based wastewater treatment plants 180
1.11.2 Processes which occupy small land areas and are adequate for cases in which the land available for wastewater treatment i 183
1.12 REMOVAL OF PATHOGENS, PHOSPHOROUS AND NITROGEN IN APPROPRIATE TECHNOLOGY PROCESSES 186
1.12.1 Removal of pathogenic organisms 186
1.12.2 Removal of phosphorous and nitrogen 187
1.13 RECOVERY OF RESOURCES FROM MUNICIPALWASTEWATER, THE POTENTIAL FOR GENERATION OF ENERGY IN WASTEWATER TREATMENT PLANTS AND ITS IMPLICATIONS REGARDING THE SUSTAINABILITY OF THEIR OPERATION 191
1.13.1 Introduction 191
1.13.2 Effluents as a water source for irrigation 192
1.13.3 Effluents as a source of fertilizers 193
1.13.4 Wastewater as a source of energy 194
1.13.5 Wastewater treatment for reducing green house gases emission 200
1.13.6 Contribution of resources generation to sustainability and improved management of utilities 200
1.13.7 Example of recovery of the resources contained in wastewater 201
1.14 APPROPRIATE TECHNOLOGY TREATMENT PROCESSES CLASSIFIED ACCORDING TO THEIR ADEQUACY FOR USE IN VARIOUS CATEGORIES OF SIZE OF CITIES 202
1.15 PERFORMANCE AND COSTS OF APPROPRIATE TECHNOLOGY TREATMENT PROCESSES IN RELATION TO ACTIVATED SLUDGE 203
1.16 SLECTION OF THE ADEQUATE TREATMENT PROCESS 205
1.17 SEWERAGE NETWORKS, THE CONDOMINIAL SEWERAGE CONCEPT 209
1.18 WASTEWATER TREATMENT IN THE CONTEXT OF GLOBALWATER ISSUES 211
1.18.1 Introduction 211
1.18.2 The global water crisis 211
1.18.3 The main water consumers and the potential for water savings by consumer category 214
1.18.4 Reasons for the water crisis 214
1.18.5 Water and climate change 215
1.18.6 The situation of the poor 215
1.18.7 Water as a human right 215
1.18.8 Proposed strategy options to alleviate the water crisis 216
1.18.9 The water crises implications on wastewater treatment 219
1.19 THE PROCESSES FOR WHICH DESIGN PROCEDURES ARE PRESENTED IN THE FOLLOWING CHAPTERS 220
Part 2 222
Design 222
Chapter 2 223
Decomposition processes of organic matter 223
2.1 INTRODUCTION1 223
2.2 THE BIOCONVERSION EQUATION 229
2.2.1 Aerobic conversion 229
2.2.2 Anaerobic conversion 230
2.3 BACTERIAL METABOLISM 231
2.4 AEROBIC DECOMPOSITION 235
2.5 ANAEROBIC DECOMPOSITION 237
2.6 DIFFERENCES BETWEEN AEROBIC AND ANAEROBIC TREATMENT 239
2.7 KINETICS AND STOICHIOMETRY OF CARBONACEOUS BOD DECOMPOSITION3 240
Chapter 3 248
Calculation of the wastewater flow and BOD load 248
3.1 DESIGN FLOW1 248
3.2 BOD DESIGN LOAD 251
3.3 SAMPLE CALCULATION 253
3.3.1 Solution 253
Chapter 4 257
Rotating Micro Screens – RMS 257
4.1 PROCESS DESCRIPTION 257
4.1.1 Introduction 257
4.1.2 Process basics 259
4.1.3 Performance 265
4.2 BASIC DESIGN PROCEDURE 267
4.2.1 General design considerations 267
4.2.2 Orderly design method (ODM) 267
4.3 BASIC DESIGN EXAMPLE 269
THE ORDERLY DESIGN METHOD APPLIED TO ROTATING MICROSCREEN 272
Chapter 5 281
Treatment in stabilization lagoons 281
5.1 PROCESS DESCRIPTION 281
5.1.1 Introduction 281
5.1.2 Basics of the process 285
5.1.3 PERFORMANCE 294
5.2 BASIC DESIGN PROCEDURES 297
5.2.1 General design considerations 297
5.2.2 Orderly design method – ODM 299
5.3 BASIC DESIGN EXAMPLE 312
Chapter 6 325
Anaerobic treatment 325
6.1 PROCESS DESCRIPTION 325
6.1.1 Introduction1 325
6.1.2 Basics of the processes 326
6.1.3 Performance 334
6.2 BASIC DESIGN PROCEDURE 336
6.2.1 General design considerations 336
6.2.2 Orderly design method, ODM 337
6.3 BASIC DESIGN EXAMPLE 347
Chapter 7 363
Stabilization reservoirs, concepts and application for effluent reuse in irrigation 363
7.1 PROCESS DESCRIPTION 363
7.1.1 Introduction 363
7.1.2 Basics of the process 365
7.1.3 Performance 376
7.2 BASIC DESIGN PROCEDURES 377
7.2.1 General design considerations 377
7.2.2 Orderly Design Method, ODM 378
7.3 BASIC DESIGN EXAMPLE 393
Chapter 8 407
Sub-Surface Flow Constructed Wetlands (SSFCW) 407
8.1 PROCESS DESCRIPTION 407
8.1.1 Introduction 407
8.1.2 Basics of the process 409
8.1.3 Performance 413
8.2 BASIC DESIGN PROCEDURE 414
8.2.1 General design considerations 414
8.2.2 Orderly Design Method, ODM 414
8.3 DESIGN EXAMPLE 420
Chapter 9 431
Chemically Enhanced Primary Treatment (CEPT) 431
9.1 PROCESS DESCRIPTION 431
9.1.1 Introduction1 431
9.1.2 Basics of the process 432
9.1.3 Performance 445
9.2 BASIC DESIGN PROCEDURES 445
9.2.1 General design considerations 445
9.2.2 Orderly design method, ODM 446
9.3 BASIC DESIGN EXAMPLE 448
Chapter 10 457
Complementary processes to combine with appropriate technology processes 457
10.1 INTRODUCTION 457
10.2 SAND FILTRATION 458
10.2.1 Introduction 458
10.2.2 Basics of the process 461
10.2.3 Basic design 466
10.3 DISSOLVED AIR FLOTATION (DAF)1 469
10.3.1 Introduction 469
10.3.2 Basics of the process 470
10.3.3 Basic design 471
10.4 UV DISINFECTION (BY ULTRAVIOLET RAYS) 473
10.4.1 Introduction 473
10.4.2 Basics of the process 475
10.4.3 Basic design 477
10.5 MEMBRANES 479
10.5.1 Introduction 479
10.5.2 Basics of the process 484
10.5.3 Basic design 487
Chapter 11 489
Combinations of unit processes of appropriate technology 489
11.1 INTRODUCTION 489
11.2 COMBINATION 1: ROTATING MICRO SCREENS FOLLOWED BY UASB FOLLOWED BY FACULTATIVE LAGOONS 491
11.2.1 Introduction 491
11.2.2 Performance 493
11.2.3 Design 493
11.3 COMBINATION 2: ROTATING MICRO SCREENS FOLLOWED BY UASB FOLLOWED BY ANAEROBIC FILTER 499
11.3.1 Introduction 499
11.3.2 Performance 501
11.3.3 Design 502
11.4 COMBINATION 3: ROTATING MICRO SCREENS FOLLOWED BY UASB FOLLOWED BY SAND FILTRATION FOLLOWED BY UV DISINFECTION 502
11.4.1 Introduction 502
11.4.2 Performance 503
11.4.3 Design 503
11.5 COMBINATION 4: ROTATING MICRO SCREENS FOLLOWED BY CEPT FOLLOWED BY SAND FILTRATION FOLLOWED BY UV DISINFECTION 506
11.5.1 Introduction 506
11.5.2 Performance 507
11.5.3 Design 508
11.6 COMBINATION 5: ROTATING MICRO SCREENS FOLLOWED BY UASB FOLLOWED BY ANAEROBIC FILTER FOLLOWED BY DAF FOLLOWED BY MEMBRANE FILTRATION (MICRO FILTRATION AND IF NECESSARY ULTRA FILTRATION) 509
11.6.1 Introduction 509
11.6.2 Performance 510
11.6.3 Design 511
Chapter 12 515
Global warming and wastewater treatment impact on climate 515
12.1 GLOBALWARMING1 515
12.1.1 Introduction 515
12.1.2 Earth’s temperature and warming 519
12.1.3 CO2 emission 525
12.1.4 GCM: global climate models 526
12.1.5 The data of vostok and other analyses 529
12.1.6 The Kyoto Protocol 531
12.1.7 IPPC proposals 532
12.1.8 Geoengineering proposals 535
12.1.9 Final reflections 539
12.2 WASTEWATER TREATMENT IMPACT ON CLIMATE 540
12.2.1 Emission factors (EF) of green house gases in wastewater treatment systems18 540
12.2.2 Methodologies of quantification of green house gases in wastewater treatment systems 543
12.2.3 The impact of wastewater on global warming 544
12.3 CLEAN DEVELOPMENT MECHANISMS (CDM) 547
12.3.1 The kyoto protocol and the CDM 547
12.3.2 Requirements of the CDM 548
12.3.3 A CDM case study: Santa Cruz, Bolivia22 551
References 561
Index 570