Wastewater operator continuing education

Trickling Filters: What More Flow Buys and Costs

Training certificate — Rhode Island requires no renewal hours

Operators often face trouble when increasing flow through trickling filters without understanding how it affects recirculation, sludge, and effluent quality. This hour shows how to read plant data and adjust hydraulic rates to keep the filter working well without wasting energy or causing problems.

Course summary, as it appears on your certificate

Equip operators with an understanding of the effects and trade-offs when manipulating flow and recirculation rates in trickling filter and fixed-film wastewater treatment processes, with emphasis on hydraulic levers distinct from activated sludge practices.

Level 2 — what each change does to the plant — effluent, efficiency, sludge and energy — assumes Level 1

Credit awarded: 1 hour — Technical

The Rhode Island course number is issued by the Agency for this course and is printed on your certificate.

Reviewed by: Robert Risley, Class 1 Wastewater Operator — reviewed October 2026

AquaCert does not mark its own homework: a licensed operator reviews the content and the course cannot be sold while that review is out of date.

One hour of study is one hour of credit. Your certificate reports the hours, which is what Rhode Island records against your renewal.

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What's included

• ✓ Self-paced online coursework you can start, pause, and resume anytime
• ✓ Short questions along the way, and a short final quiz to pass for your certificate (retake it as often as you need)
• ✓ An official certificate of completion (PDF) with a public verification code
• ✓ Progress saved to your My Learning dashboard