Wet weather design and operation in water resource recovery facilities : a special publication. / Water Environment Federation.

Format:

Book

Author/Creator:

Water Environment Federation, author.

Contributor:

Water Environment Federation.

Series:

WEF special publication

Language:

English

Subjects (All):

Sewage disposal plants--Design and construction.

Sewage disposal plants.

Sewage disposal plants--Management.

Physical Description:

1 online resource (xxxii, 305 pages) : illustrations.

Place of Publication:

Alexandria, Virginia : Water Environment Federation, [2014]

Summary:

Wet Weather Design and Operation in Water Resource Recovery Facilities provides professionals involved in the field with a comprehensive reference of current design and operational practices for dealing with the unique challenges associated with the proper management of wet weather flows. Intended as a companion to Design of Water Resource Recovery Facilities , 6th Edition, MOP 8, Wet Weather Design and Operation in Water Resource Recovery Facilities focuses on providing a wet weather flow management perspective to the subject matter previously covered by the widely relied upon design practitioner resource. Going beyond MOP 8 by including operational-oriented considerations related to wet weather events, the text is comprised of 16 chapters, grouped around planning and configuration for wet weather events in water resource recovery facilities and facility processes.

Contents:

Intro

Title Page

Copyright

Contents

List of Figures

List of Tables

Preface

Chapter 1 Introduction

Christopher W. Tabor, P.E., and Julian Sandino, Ph.D., P.E., BCEE, CH2M HILL, Co-Chair

1.0 Background and Purpose

2.0 Scope and Organization

3.0 Reference

Chapter 2 Overall Design Considerations

Dale E. Kocarek, P.E., BCEE

Patrick J. Bradley

Nicholas J. Bucurel, P.E.

and Jon Cooper

1.0 Water Quality Considerations

1.1 Introduction to Water Quality Standards

1.2 Effects of Untreated Wastewater

1.2.1 Bacteriological Effects

1.2.2 Oxygen Depletion

2.0 Background on Regulatory and Historical Practices

2.1 Requirements of the Clean Water Act

2.2 Past Regulatory Practices

3.0 National Pollutant Discharge Elimination System Permit Considerations

3.1 Technology-Based Limits and Water Quality-Based Limits

3.2 Concentration and Loading Limits

3.3 Seven-Day Average and 30-Day Average Limits

3.4 Bypass and Overflow Reporting

4.0 Climate Change Design Considerations

5.0 Definition of Flows

6.0 Introduction to System Wet Weather Flow Management

6.1 Introduction

6.2 Collection System Considerations

6.2.1 Collection System Type

6.2.2 Flow Storage and Satellite Treatment

6.2.3 Flow Storage, Satellite Treatment, and High-Rate Treatment

7.0 Green Solutions

8.0 References

Chapter 3 Integrated System Approach for Design

Jim Scholl, Susan Moisio, and Nalin Sahni

1.0 Introduction

2.0 Integrated System Planning

3.0 Integrated System Design Components

4.0 Integrated Planning Example

5.0 References

6.0 Suggested Reading

Chapter 4 Integrated System Approach for Operations

James Drake, P.E., BCEE, and Jane McLamarrah, Ph.D., P.E.

2.0 Planning for Integrated Operation.

2.1 Effect of Collection System Maintenance

2.2 Collection System Integration with Treatment

2.3 Receiving Waterbody Considerations during Wet Weather Operations

2.4 Water Resource Recovery Facility

3.0 Facility Operational Considerations during Wet Weather Events

3.1 Challenges of Precipitation Characterization during Wet Weather Operations

3.2 Energy Management

3.3 Water Quality Effects of Regulatory/Permit Thresholds

3.4 Returning to Normal Operations and Minimizing Maintenance Requirements

3.5 Managing Stormwater Generated On-Site

3.6 Postevent Analysis

4.0 Development of Standard Operation Procedures for Wet Weather Events

4.1 Wet Weather Configurations

4.2 Purpose of Water Resource Recovery Facility Wet Weather Standard Operation Procedures

4.3 Standard Operation Procedure Parameters

6.0 Suggested Readings

Chapter 5 Site Selection and Facility Arrangement

Siddhartha Sengupta, P.E.

Valerie Fuchs, Ph.D.

Jared C. Hutchins, P.E., ENV SP

Jason Iken, P.E.

and Jane McLamarrah, Ph.D., P.E.

2.0 Site Selection

3.0 Facility Arrangement

3.1 Layout Types

3.2 Arrangement of Treatment Processes

3.3 Site Drainage

4.0 Case Studies

4.1 Adding Wet Weather Capacity an Existing Water Resource Recovery Facility

4.2 Comparison of Conventional and High-Rate Treatment Technologies at a New Site

Chapter 6 Facility Hydraulics and Pumping

Joseph C. Reichenberger P.E., BCEE, and David Terrill, P.E.

2.0 Hydraulics and Flow Splitting

2.1 Hydraulic Profile Effects

2.2 Hydraulic Fundamentals

2.3 Flow Splitting Options

2.3.1 Active Systems

2.3.1.1 Modulating Weirs

2.3.1.2 Tilting or Folding Weirs

2.3.1.3 Modulating Valves and Gates

2.3.1.4 Pumping.

2.3.2 Passive Systems

2.3.2.1 Vortex Valves

2.3.2.2 Orifices

2.3.2.3 Constant Level Gate

2.3.2.4 Fixed Overflow Weir

3.0 Pumping Design

4.0 Other Hydraulic Considerations

5.0 Odor Control

6.0 References

Chapter 7 Support Systems

Vamsi Seeta and Jann Yamauchi

2.0 Power System

2.1 Power Supply Reliability and Redundancy

2.2 Demand-Side Management

2.2.1 Power Demand Spikes

2.2.2 Load Management-Peak Load Shifting/Load Shedding

2.3 In-rush Current and Mitigation Measures

3.0 Standby/Emergency Power System

3.1 Critical Loads

3.2 Diesel Emergency/Standby Engine Generators

3.3 Diesel-Fueled Engines and Pumps

3.4 Co-Generation Engines as Backup Power System

4.0 Chemical Feed and Storage Facilities

5.0 Communications and Controls

Chapter 8 Occupational Health and Safety

Stacy J. Passaro, P.E., BCEE, and Alan Scrivner

1.0 Safety during Wet Weather Events

2.0 Wastewater Wet Weather Infrastructure and Specific Hazards

2.1 Manholes

2.2 Wet Wells and Dry Wells

2.3 Vaults

2.4 Force Mains and Appurtenances

2.5 Screens

2.6 Grit Removal Systems

2.7 Flow Channels

2.8 Equalization Tanks/Basins

2.9 Process Tanks

2.9.1 Flooded Conditions

2.9.2 Empty Tanks

2.10 Emergency Process Modes

2.11 Chemical Feed for Wet Weather Treatment

2.12 Satellite/Remote Wet Weather Treatment Facilities and Filters

2.13 Power Systems

2.14 Access Road Flooding

2.15 Building Flooding

2.16 Site Construction Effects

2.17 Climatic Effects

2.18 Summary

3.0 Wet Weather Risk Management

3.1 Risk Analysis

3.2 Disaster Planning

4.0 Disaster Management and Recovery

4.1 Event Monitoring and Reporting

4.2 Coordinating with Local Emergency Operations

4.3 Coordination with Federal Agencies.

5.0 Reference

Chapter 9 Modeling for Wet Weather

Peter A. Vanrolleghem, Ph.D., ing.

Lorenzo Benedetti

Susan Moisio

and Nalin Sahni

1.0 Holistic Planning and Operations-The Integrated Urban Wastewater System

1.1 Introduction

1.1.1 Benefits of Integrated Modeling

1.1.2 Challenges of Integrated Modeling

1.2 Modeling of System Components

1.2.1 Urban Catchment

1.2.2 (Simplified) Collection System

1.2.3 Water Resource Recovery Facility

1.2.4 Receiving Stream

1.2.5 Interfaces between Subsystems

1.2.6 Real-Time Control

1.3 Generation and Evaluation of Options

1.3.1 Simulation Period: Event-Based Versus Long-Term Simulation

1.3.2 Key Performance Indicators, Time Series Analysis

1.4 Examples of Case Studies

2.0 Modeling the Influent Characteristics-A Collection System Perspective

2.1 Flow Characterization

2.1.1 Flow Generation

2.1.1.1 Combined Systems: Rainfall/Runoff/ Groundwater Infiltration/Snowmelt

2.1.1.2 Separate Systems: Rainfall-Dependent Inflow and Infiltration

2.1.2 Flow Conveyance/Storage: Operations with Special Attention to Storage

2.1.3 Modeling Climate Change

2.1.4 Risk/Regulatory Effects

2.2 Composition Characterization

2.2.1 Runoff Pollution Composition in Combined Sewers

2.2.2 First Flush (Sediment Resuspension Plus Dry Weather Plug Flush-Out)

2.2.3 Sediment Inventory

2.2.4 Retention Tank Effects on Wastewater Quality

2.2.5 Temperature Variations Resulting from Rain, Snowmelt, or Summer Storms

2.2.6 Oxygen Content

3.0 Modeling Wet Weather at the Water Resource Recovery Facility

3.1 Preliminary Treatment

3.2 Primary Treatment

3.2.1 Models with Enhanced Predictive Power for Wet Weather Flows

3.2.2 Chemically Enhanced Primary Treatment Models

3.3 Biological Treatment.

3.3.1 Influent Wastewater Characterization for Model Use

3.3.2 Modeling Mixing Behavior under Wet Weather Hydraulics

3.3.2.1 Tanks-in-Series

3.3.2.2 Computational Fluid Dynamics

3.3.3 Modeling Aeration Efficiency under Wet Weather Conditions

3.3.4 Secondary Clarifier Models with Enhanced Predictive Power under Wet Weather Flows

3.3.5 Modeling Approaches for Real-Time Control Systems for Wet Weather

3.4 Physical and Chemical Treatment

3.5 Disinfection

3.6 Residuals Processing and Management

4.0 References

5.0 Suggested Readings

Chapter 10 On-Site Storage/Flow Equalization

Thomas A. Lyon, P.E.

2.0 Location

2.1 Location in the Treatment Process

2.2 Hydraulic Considerations

2.3 Site Considerations

3.0 Sizing and Type of Construction

3.1 Peak Flow and Volume Requirements

3.2 Modular Design

3.3 Type of Construction

4.0 Pretreatment Requirements

4.1 Screening

4.2 Grit Removal

5.0 Operation

5.1 Flow Diversion and Startup

5.2 Sustained Operation

5.3 Operation as a Retention Treatment Basin

5.4 Dewatering

5.5 Cleanup and Preparedness for the Next Event

6.0 Significant Components

6.1 Mixing and Aeration Systems

6.2 Dewatering Pumps/Control Valves

6.3 Basin Cleaning Systems

6.3.1 Sludge Collectors

6.3.2 Tipping Buckets

6.3.3 Hydraulic Flush Gates

6.3.4 Siphon Chambers

6.3.5 Water Cannons/Yard Hydrants

6.3.6 High-Pressure Spray Water Systems

6.3.7 Manual Cleaning

6.4 Odor Control

7.0 References

8.0 Suggested Readings

Chapter 11 Preliminary Treatment

William Eleazer, P.E., and Allen P. Sehloff, P.E.

1.0 Scope

1.1 Screenings Removal

1.2 Grit Removal

1.3 Flow Equalization

2.0 Effects of Wet Weather Flows on Preliminary Treatment

2.1 Effect on Screenings Systems

2.1.1 Screens.

2.1.2 Channel Velocity and Hydraulics.

Notes:

Includes bibliographical references and index.

Description based on print version record.

ISBN:

1-57278-308-7

1-5231-0313-2