Tag Archives: low lagoon DO

Preventing Fall Lagoon Odor Caused by Seasonal Turnover

October is here—time for football, apple cider, falling leaves, and seasonal lagoon turnover. Although less extreme than the spring transition, autumn’s cooler temperatures cause destratification and may trigger lagoon turnover and corresponding odors. In this short article, we’ll talk about the causes … Continue reading



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Lagoon Aeration System Design: Calculations and Common Pitfalls

To ensure wastewater treatment objectives are met, a lagoon aeration system design must be customized for its specific application. In this video, Patrick Hill outlines the facility details we use to calculate aeration requirements and customize a lagoon aeration system design. … Continue reading



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Duckweed Control in Wastewater Lagoons

Duckweed, or water lens, is a rapidly growing, invasive aquatic plant that thrives in wastewater lagoons due to the presence of ammonia and phosphorus, which act as fertilizer. Since summertime is high season for lagoon duckweed, it’s a good time … 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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Why are there red streaks in my lagoon? About lagoon Daphnia

We love hearing from operators–their questions give us insight into what may be going on in other lagoon systems. An operator asked if we could identify some red bugs he saw floating on the edge of his lagoon. At first we … Continue reading



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Troubleshooting Low Lagoon Dissolved Oxygen

Lagoon dissolved oxygen, or DO, is the lifeblood of the wastewater lagoon system. The bacteria and other microbes that consume biological oxygen demand (BOD) need 1.5–2 lbs. of dissolved oxygen per pound of influent BOD, and as much 4 lbs. of … 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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That Dairy Air: Preventing Dairy Wastewater Odor

We’ve seen quite a few news stories recently about dairies being cited and fined for wastewater lagoon violations, namely biological oxygen demand (BOD) exceeding permit levels and odor complaints. So what’s going on? Why is dairy processing wastewater such 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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Troubleshooting High Wastewater Pond TSS

Total Suspended Solids, or TSS, is a standard testing parameter for wastewater pond or lagoon operators. Effluent TSS is a measurement of  the amount of solid material that is escaping with the wastewater pond or lagoon effluent, and is a … Continue reading



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