City of Fond du Lac is accepting applications for the position of Wastewater Operations Intern at the Wastewater Treatment & Resource Recovery Facility (WTRRF).  Various duties and responsibilities will include the following:

The Intern will assist the Main Plant Operator with equipment rotations and determining calculations for high strength waste, sludge transfer, and monitoring chemical inventory.


Because this is a hands-on opportunity, there will be times when the intern will be expected to contribute to normal daily maintenance and get dirty cleaning the influent wetwell, fine screens, grit washer, and/or screening conveyors and raking the roll-off.

Primary Treatment

·         Scum Pit Cleaning – learn the method of scum pit cleaning under the direction of the operator

·         Pump Activation – learn the primary/blend pumping procedures

Secondary Treatment

·         Mixed Liquor Solids – learn how to use a settleometer and calculate the SVI.  They will also learn the operation of a microscope for performing microbial analysis on a daily basis to determine the diverse health and activity of our mixed liquor

·         RAS/WAS Pump Operation -The Intern will be shown the method of RAS and WAS Pump Operation.  Under the direction of the Operator, they will make adjustments to the RAS and WAS rates.


  • There will be daily sampling for both operation and lab analysis.  The Intern will be directly involved with aeration basin profiling for phosphorus, ammonia, nitrates, dissolved oxygen and COD.

·         pH Analysis – learn the methods of pH analysis and calibration using the laboratory pH meter.  The Intern will then be responsible for performing and recording pH during their rounds with an operator including digester, mixed liquor and effluent.

·         Sludge Depth Measurement -The intern will be shown the method of sludge depth measurements and will be responsible for performing the measurements under the direction of a treatment plant operator both in the primary and secondary clarifiers. They will also learn how to make operational decisions based off these measurements.

Sludge Handling

·         Centrifuge Operations – Under the direction of an Operator, learn all aspects of centrifuge operation and perform sampling and testing for total solids using a moisture analyzer.  Additionally, the Intern will be involved in polymer preparation and conveying the biosolids into roll-offs for disposal.

  • Digesters – The Intern will assist the Operator with their digester rounds including checking digester levels, pH and completing the log sheet.

Biogas Engine

  • System Maintenance and Monitoring – There is a 450 kW Biogas Engine on site and monitoring includes checking temperatures, pressures and levels of associated equipment to ensure smooth and efficient operation.
  • Gas Cleaning and Monitoring – The Intern will have the opportunity to learn about the biogas cleaning equipment, gas analysis and associated equipment log sheets.


  • The intern will have the opportunity to learn wastewater laboratory techniques and spend approximately 2-3 weeks with the laboratory staff shadowing and having hands on opportunities.

·         Analyses learned will include at minimum total suspended solids, ammonia, total phosphorus, biochemical oxygen demand and chemical oxygen demand.

Requirements include high school graduation and ideally current enrollment in a two or four-year college program focused on wastewater or related science. Scheduled hours are from approximately June – August from 7:00 am – 3:30 pm.

The pay rate is $13.83/hour.  Applications reviewed upon receipt.

Please visit for application materials, or call (920) 322-3624. A physical exam and drug-screening test is required prior to employment.