Topic outline

  • Sewer Sedimentation Control

    Credits: 6 PDH

    PDH Course Description:

    Sewer sediment is one of major sources of pollutants in urban wet-weather flow (WWF) discharges that include combined-sewer overflow (CSO), separate sanitary-sewer overflow (SSO), and stormwater runoff. During lowflow, dry-weather periods, sanitary wastewater solids deposited in combined sewers have significant adverse impacts on the integrity of the sewerage system and receiving-water quality. In the US, estimates of dry-weather flow deposition in combined sewers vary from 5 to 30% of the daily inputs of solids and pollutants.This course covers sources of sewer solids, sewer solids loading, sewer sediment and associated pollutants and their impacts, sewer cleaning, and in-sewer sediment control. For in-sewer sediment control, the report presents a number of in-sewer flushing systems with case studies.

    Topics:

    • Sources of Sewer Sediment
    • Overland Surface Runoff Solids
    • Sanitary Wastewater Solids
    • Structural Deterioration of Sewerage System
    • Receiving Water, Groundwater
    • Storm Runoff Solids Loading
    • Litter and Floatables
    • Effects of Roadway Sanding,Street Dust and Dirt
    • Road Sand, Street Dust and Dirt, Soil Erosion
    • Summary of Solids Loading
    • Effects of Age and Maintenance
    • Organic Pollutant loading
    • Hydrogen Sulfide in Sewers, and Factors Affecting Sulfide Concentration
    • Structural Corrosion
    • Hydrogen sulfide and Dissolved Sulfide Sampling and Testing Procedures
    • Wastewater, Pore Space, Continuous Dissolved Sulfide Sampling
    • Power Rodding, Balling, Jetting, Pigging, Power Bucket, Silt Traps
    • Vacuum Flushing System and Automatic Vacuum Flushing Systems
    • Flushing Small Diameter Sewers
    • Alternative Sources of Flush Water
    • Integration of New Conveyance System/Flushing Vaults and Grit Pit Functionalities
    • Flushing Vaults, Grit Pits
    • Sediment Accumulation and Estimating Methodology
    • Runoff Volumes
    • Potential Wet Weather Solids Deposition
    • Operation and Maintenance Costs
    • Cost Effectiveness Analysis of Automated Flushing vs Periodic Manual Sediment Removal
    • Capital Costs for the Automated Flushing Systems, and Manual Cleaning

    To take this course:

    1.) Enroll in Course:
    Click below to enroll:
    (must be logged into your user account)


    2.) Study: Once enrolled, click below to begin the course:

    Download the Study Guide

    3.) Test: Once you've thoroughly read the course materials, please click below to take the final examination.

    Take the final exam

    4.) Certificate: A passing grade of 70% or higher on the exam, is required to receive the certificate of completion for this PDH course.
         NOTE: After the exam is completed, you will need to return to this page, in order to print (download) the certificate of completion.

    Print the Certificate of Completion


    Intended Audience: for civil, construction, and hydraulic engineers.
    Publication Source: US Environmental Protection Agency

    Donald Parnell, PE
    • Topic 1