Tag Archives: lagoon circulation

Wastewater Lagoon Odor Control for Spring Turnover

Spring is the time of the year when unmixed lagoons turn over, so it’s also the time of the year when operators (and local residents) are concerned about wastewater lagoon odor control. Although spring lagoon turnover and its accompanying odors … Continue reading



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Lagoon Hydraulics: Diagnosing and Preventing Short-Circuiting

“Short-circuiting is the greatest deterrent to consistent pond performance. The importance of the hydraulic design of a pond system cannot be overemphasized.” That’s a quote from the EPA’s lagoon manual, Principles of Design and Operations of Wastewater Treatment Pond Systems for … Continue reading



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Lagoon Diffuser Mixing Performance: CFD Study of the MARS

We know good data leads to good decisions, so we’re always looking for ways to improve our data. Recently, we commissioned a CFD (Computational Fluid Dynamics) study of our MARS lagoon diffuser to refine our data about its performance. A … Continue reading



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What are these red worms in the lagoon?

We’re often in the field, visiting wastewater lagoon facilities and learning about the challenges operators face. Last week, an operator in Georgia showed us a video of lagoon sludge swarming with tiny, wriggling red worms (see video below). Since we’re always interested in … Continue reading



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Spring Lagoon Odors: Can Lagoon Circulators Prevent Them?

Ah, Spring! The daffodils are blooming, the birds are chirping, and all the solids that settled to the bottom of the wastewater lagoon over the winter are getting dislodged, releasing sludge and gases that create spring lagoon odors. For many municipalities, the … Continue reading



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Wastewater Pathogen Removal: Do Lagoons Do It Better?

When it comes to controlling disease-causing pathogens, lagoons do it better—but do they do it well enough? The purpose of wastewater treatment is to remove before discharge any substance that can have a negative effect on the environment. In previous articles, … Continue reading



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How to Prevent Autumn Lagoon Turnover and Odors

It’s autumn again—time for football, apple cider, falling leaves, and wastewater lagoon turnover. Although less extreme than the spring transition, cooler fall temperatures cause destratification and may trigger lagoon turnover. In this short article, we’ll talk about causes of lagoon … Continue reading



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Aerated Lagoon Design: Partial Mix vs. Complete Mix

According to an EPA wastewater technology fact sheet, the purpose of wastewater aeration is twofold: to supply the required oxygen to the metabolizing microorganisms; and to provide mixing so that the microorganisms come into contact with the dissolved and suspended … Continue reading



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Lagoon Aeration: Enemy of Sludge Accumulation

Benjamin Franklin famously said there are only two things in this world to be certain of: death and taxes. Wastewater operators can add a third: sludge. Sludge can be just a normal, innocuous byproduct of wastewater treatment, or it can be a … Continue reading



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How to Prevent Spring Lagoon Turnover and Odors

Spring is in the air, and for some wastewater lagoons, that means foul lagoon odors are in the air, too. In this short article, we’ll talk about seasonal lagoon turnover, why the spring turnover can be the most severe, and how … Continue reading



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