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Spring Is Coming and It’s Lagoon Time!

By Heather Jennings, PE

As winter loses its grip on us and we move toward spring, it’s finally time to start monitoring lagoons for seasonal turnover and stricter permit requirements. It’s also a great time to start bioremediation of your lagoon organic sludge!

With warmer weather it is easy to capitalize on those microorganisms that have been suppressed during the cooler months. A good example of this is a system we worked with in New Mexico that was dealing with irregular sludge build-up in their three lagoons. The system was modified to run in series relative to the influent rather than the short circuiting that took the first pond out of use. A 6-month test (later extended to 300 days) was developed in which Bio Energizer®, a bio stimulant, was administered to make nutrients more available to wastewater microorganisms.

Results: Pond 1 had a 12% sludge reduction, Pond 2 had a 36% reduction, and Pond 3 had a 24% reduction. The great thing is that no dredging expense was necessary, just daily application of Bio Energizer®.

To download/read the case study. click here for English or here for Spanish.

BIO ENERGIZER® Reduces Sludge 45% In One Year, Saves Municipal Plant $6 M In Dredging Costs

by Heather Jennings, PS

In this study, a one-year bioremediation plan featuring Bio Energizer® was implemented for a municipal wastewater treatment facility with 2 primary lagoons in which sludge depths had reached 5–7 feet. The lagoons were at risk of upset and wastewater processing capacity was reduced. 

Bio Energizer® was added via peristaltic pump to the lagoon inlets. Initially the dose applied was 7 ppm (7 gallons of product to 1,000,000 gallons of influent, assuming a typical Biochemical Oxygen Demand [BOD5] of 240 mg/L) and was eventually decreased 10 months later to 5 ppm. A maintenance dose of 3 ppm was established 2 months later.

Sludge levels were measured at baseline and quarterly. Sludge depth was biologically reduced by an average of 45%. This represented 17,810 dry tons of sludge that did not need to be mechanically removed and hauled to a disposal location, a potential savings of $6 million. When compared with product cost, and it was found that the facility product investment was 5.8% of the potential dredging costs.

To view the report, click here.

For more information about Bio Energizer®, click here.

The Water Break Podcast, Episode #5: Lagoon Aeration

“Where we bridge the gap between water plant operators and engineers”

In this podcast episode, host Heather Jennings, PE, interviews Patrick Hill, a wastewater treatment lagoon specialist at Triplepoint Environmental. Patrick has presented on lagoon topics at conferences throughout the U.S. and at WEFTEC. He was named one of Water and Waste Digest’s young water professionals to watch in 2015. In this podcast, Heather and Patrick discuss lagoons, their technical considerations, and aeration options. And at the end of the podcast, in Wanda’s Water Tidbits, Heather describes an Australian effort to use an electrochemical method to clean up heavily polluted industrial wastewater.

Triplepoint Environmental Website: lagoons.com

REFERENCED IN THE PODCAST

New Atlas article: Zaps of electricity clean up wastewater from biofuel production

Algal Research article: Electrochemical oxidation of nitrogen-rich post-hydrothermal liquefaction wastewater

University of Sydney article: Engineers use electricity to clean up toxic water

Bugs Bunny and Daffy Duck animation: Algae Season/Duckweed Season

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