Skip to main content
U.S. flag

An official website of the United States government

Here’s how you know

Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

HTTPS

Secure .gov websites use HTTPS
A lock (LockA locked padlock) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

    • Environmental Topics
    • Air
    • Bed Bugs
    • Cancer
    • Chemicals, Toxics, and Pesticide
    • Emergency Response
    • Environmental Information by Location
    • Health
    • Land, Waste, and Cleanup
    • Lead
    • Mold
    • Radon
    • Research
    • Science Topics
    • Water Topics
    • A-Z Topic Index
    • Laws & Regulations
    • By Business Sector
    • By Topic
    • Compliance
    • Enforcement
    • Laws and Executive Orders
    • Regulations
    • Report a Violation
    • Environmental Violations
    • Fraud, Waste or Abuse
    • About EPA
    • Our Mission and What We Do
    • Headquarters Offices
    • Regional Offices
    • Labs and Research Centers
    • Planning, Budget, and Results
    • Organization Chart
    • EPA History

Breadcrumb

  1. Home
  2. Compliance

Microbiology of Wastewater Treatment

Related Information
  • CWA-NPDES Permit Compliance Technical Assistance Webinar Series
On this page:
  • Training Video
  • Presenter
  • Supplemental Materials

Training Video

This webinar introduces the audience to the microorganisms that thrive in activated sludge. Changes in the environment of the aeration tank will cause different bacteria to grow. In particular, the filamentous bacteria will especially dominate when specific activated sludge environment supports their growth. Therefore, if you don’t like what has grown, change the aeration tank environment and something different will grow – hopefully settling better in the clarifier.  

Date of Recording: November 17, 2020 (1-2:30 pm Eastern)

Presenter

  • Jon van Dommelen has worked for Ohio EPA for 25 years. He spent the first 6 years reviewing detailed plans and issuing permits to install for new wastewater treatment, plants and collections systems in the Division of Environmental and Financial Assistance. He eventually transferred to the Division of Surface Water, joining the Compliance Assistance Unit. Four years ago, he returned to DEFA along with the CAU. He has worked in the CAU for a total of 19 years troubleshooting noncompliance at wastewater treatment plants ranging from 1500 gallon per day package plants up to 15 million gallon per day municipal systems. In addition, Jon has trained operators of WWTPs in process control of activated sludge, microbiology, biological nutrient removal, among other topics related to wastewater treatment. He has also presented at WEFTEC (3 times), at many OTCO and OWEA workshops, as well as for other regional, state, and local organizations. He has published articles pertaining to topics of interest to operators in the Buckeye Bulletin, a publication of the Ohio Water Environment Association.

    Jon graduated from Ohio State University with a Bachelor of Science in Civil Engineering and is a register Professional Engineer in the State of Ohio. His wife tells people that no one should have as much fun at their job as Jon does.

Supplemental Materials

  • Microbiology of Wastewater Treatment: Training Slides (pdf) (9.53 MB, November 17, 2020)

Compliance

  • Addressing Noncompliance
    • How We Monitor Compliance
    • Compliance Monitoring Programs
      • CAA
      • CERCLA
      • CWA
      • FIFRA
      • RCRA
      • SDWA
      • TSCA
    • Audit Policy
    • Compliance Monitoring Resources and Guidance Documents
  • Assisting Regulated Entities
    • Compliance Assistance Centers
    • Compliance Advisors
    • Compliance Assistance Resources and Guidance Documents
  • Training EPA and its Partners
    • National Enforcement Training Institute (NETI)
  • Engaging State and Tribal Partners
    • State Review Framework
    • State Oversight Resources and Guidance Documents
  • Advancing EPA's National Planning and Results
    • Compliance Learning Agenda
  • Compliance Assurance Data Tools
    • NPDES Electronic Reporting
Contact Us about Compliance
Contact Us to ask a question, provide feedback, or report a problem.
Last updated on July 30, 2024
  • Assistance
  • Spanish
  • Arabic
  • Chinese (simplified)
  • Chinese (traditional)
  • French
  • Haitian Creole
  • Korean
  • Portuguese
  • Russian
  • Tagalog
  • Vietnamese
United States Environmental Protection Agency

Discover.

  • Accessibility Statement
  • Budget & Performance
  • Contracting
  • EPA www Web Snapshot
  • Grants
  • No FEAR Act Data
  • Plain Writing
  • Privacy
  • Privacy and Security Notice

Connect.

  • Data
  • Inspector General
  • Jobs
  • Newsroom
  • Regulations.gov
  • Subscribe
  • USA.gov
  • White House

Ask.

  • Contact EPA
  • EPA Disclaimers
  • Hotlines
  • FOIA Requests
  • Frequent Questions
  • Site Feedback

Follow.